contestId int64 0 1.01k | index stringclasses 57
values | name stringlengths 2 58 | type stringclasses 2
values | rating int64 0 3.5k | tags listlengths 0 11 | title stringclasses 522
values | time-limit stringclasses 8
values | memory-limit stringclasses 8
values | problem-description stringlengths 0 7.15k | input-specification stringlengths 0 2.05k | output-specification stringlengths 0 1.5k | demo-input listlengths 0 7 | demo-output listlengths 0 7 | note stringlengths 0 5.24k | points float64 0 425k | test_cases listlengths 0 402 | creationTimeSeconds int64 1.37B 1.7B | relativeTimeSeconds int64 8 2.15B | programmingLanguage stringclasses 3
values | verdict stringclasses 14
values | testset stringclasses 12
values | passedTestCount int64 0 1k | timeConsumedMillis int64 0 15k | memoryConsumedBytes int64 0 805M | code stringlengths 3 65.5k | prompt stringlengths 262 8.2k | response stringlengths 17 65.5k | score float64 -1 3.99 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
224 | A | Parallelepiped | PROGRAMMING | 1,100 | [
"brute force",
"geometry",
"math"
] | null | null | You've got a rectangular parallelepiped with integer edge lengths. You know the areas of its three faces that have a common vertex. Your task is to find the sum of lengths of all 12 edges of this parallelepiped. | The first and the single line contains three space-separated integers — the areas of the parallelepiped's faces. The area's values are positive (<=><=0) and do not exceed 104. It is guaranteed that there exists at least one parallelepiped that satisfies the problem statement. | Print a single number — the sum of all edges of the parallelepiped. | [
"1 1 1\n",
"4 6 6\n"
] | [
"12\n",
"28\n"
] | In the first sample the parallelepiped has sizes 1 × 1 × 1, in the second one — 2 × 2 × 3. | 500 | [
{
"input": "1 1 1",
"output": "12"
},
{
"input": "4 6 6",
"output": "28"
},
{
"input": "20 10 50",
"output": "68"
},
{
"input": "9 4 36",
"output": "56"
},
{
"input": "324 9 36",
"output": "184"
},
{
"input": "1333 93 129",
"output": "308"
},
{... | 1,663,354,433 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 4 | 2,000 | 0 | A,B,C = list(map(int, input().split()))
for i in range((A*B)+1):
for j in range((A*B)+1):
if i*j == A:
k = B/j
if k*i == C:
print(4*(int(i)+int(j)+int(k))) | Title: Parallelepiped
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You've got a rectangular parallelepiped with integer edge lengths. You know the areas of its three faces that have a common vertex. Your task is to find the sum of lengths of all 12 edges of this parallelepiped.
Input S... | ```python
A,B,C = list(map(int, input().split()))
for i in range((A*B)+1):
for j in range((A*B)+1):
if i*j == A:
k = B/j
if k*i == C:
print(4*(int(i)+int(j)+int(k)))
``` | 0 | |
220 | A | Little Elephant and Problem | PROGRAMMING | 1,300 | [
"implementation",
"sortings"
] | null | null | The Little Elephant has got a problem — somebody has been touching his sorted by non-decreasing array *a* of length *n* and possibly swapped some elements of the array.
The Little Elephant doesn't want to call the police until he understands if he could have accidentally changed the array himself. He thinks that he co... | The first line contains a single integer *n* (2<=≤<=*n*<=≤<=105) — the size of array *a*. The next line contains *n* positive integers, separated by single spaces and not exceeding 109, — array *a*.
Note that the elements of the array are not necessarily distinct numbers. | In a single line print "YES" (without the quotes) if the Little Elephant could have accidentally changed the array himself, and "NO" (without the quotes) otherwise. | [
"2\n1 2\n",
"3\n3 2 1\n",
"4\n4 3 2 1\n"
] | [
"YES\n",
"YES\n",
"NO\n"
] | In the first sample the array has already been sorted, so to sort it, we need 0 swap operations, that is not more than 1. Thus, the answer is "YES".
In the second sample we can sort the array if we swap elements 1 and 3, so we need 1 swap operation to sort the array. Thus, the answer is "YES".
In the third sample we ... | 500 | [
{
"input": "2\n1 2",
"output": "YES"
},
{
"input": "3\n3 2 1",
"output": "YES"
},
{
"input": "4\n4 3 2 1",
"output": "NO"
},
{
"input": "3\n1 3 2",
"output": "YES"
},
{
"input": "2\n2 1",
"output": "YES"
},
{
"input": "9\n7 7 8 8 10 10 10 10 1000000000... | 1,563,213,041 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 32 | 248 | 11,366,400 | n = int(input())
a = list(map(int,input().split()))
first = -1
second = -1
i = 0
while (i<n-1) :
if (a[i]<=a[i+1]):
i += 1
else:
if (first!=-1 and second!=-1) :
break
elif (first==-1) :
first = i
i += 1
else:
second = i
... | Title: Little Elephant and Problem
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Little Elephant has got a problem — somebody has been touching his sorted by non-decreasing array *a* of length *n* and possibly swapped some elements of the array.
The Little Elephant doesn't want to c... | ```python
n = int(input())
a = list(map(int,input().split()))
first = -1
second = -1
i = 0
while (i<n-1) :
if (a[i]<=a[i+1]):
i += 1
else:
if (first!=-1 and second!=-1) :
break
elif (first==-1) :
first = i
i += 1
else:
second = i
... | 0 | |
234 | B | Reading | PROGRAMMING | 1,000 | [
"sortings"
] | null | null | Vasya is going to the Olympics in the city Ntown by train. The boy wants to read the textbook to prepare for the Olympics. He counted that he needed *k* hours for this. He also found that the light in the train changes every hour. The light is measured on a scale from 0 to 100, where 0 is very dark, and 100 is very lig... | The first input line contains two integers *n* and *k* (1<=≤<=*n*<=≤<=1000,<=1<=≤<=*k*<=≤<=*n*) — the number of hours on the train and the number of hours to read, correspondingly. The second line contains *n* space-separated integers *a**i* (0<=≤<=*a**i*<=≤<=100), *a**i* is the light level at the *i*-th hour. | In the first output line print the minimum light level Vasya will read at. In the second line print *k* distinct space-separated integers *b*1,<=*b*2,<=...,<=*b**k*, — the indexes of hours Vasya will read at (1<=≤<=*b**i*<=≤<=*n*). The hours are indexed starting from 1. If there are multiple optimal solutions, print an... | [
"5 3\n20 10 30 40 10\n",
"6 5\n90 20 35 40 60 100\n"
] | [
"20\n1 3 4 \n",
"35\n1 3 4 5 6 \n"
] | In the first sample Vasya should read at the first hour (light 20), third hour (light 30) and at the fourth hour (light 40). The minimum light Vasya will have to read at is 20. | 0 | [
{
"input": "5 3\n20 10 30 40 10",
"output": "20\n1 3 4 "
},
{
"input": "6 5\n90 20 35 40 60 100",
"output": "35\n1 3 4 5 6 "
},
{
"input": "100 7\n85 66 9 91 50 46 61 12 55 65 95 1 25 97 95 4 59 59 52 34 94 30 60 11 68 36 17 84 87 68 72 87 46 99 24 66 75 77 75 2 19 3 33 19 7 20 22 3 71 2... | 1,641,768,998 | 2,147,483,647 | Python 3 | OK | TESTS | 60 | 124 | 0 | f = open('input.txt')
n, k = map(int, f.readline().split())
s = f.readline().split()
new = list(sorted({f"{i}": int(s[i - 1]) for i in range(1, n + 1)}.items(), key=lambda item: item[1]))[n - k:]
ans = []
for q in new:
ans.append(int(q[0]))
ans = sorted(ans)
print(new[0][1], "\n", *ans, file=open('output.tx... | Title: Reading
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya is going to the Olympics in the city Ntown by train. The boy wants to read the textbook to prepare for the Olympics. He counted that he needed *k* hours for this. He also found that the light in the train changes every ho... | ```python
f = open('input.txt')
n, k = map(int, f.readline().split())
s = f.readline().split()
new = list(sorted({f"{i}": int(s[i - 1]) for i in range(1, n + 1)}.items(), key=lambda item: item[1]))[n - k:]
ans = []
for q in new:
ans.append(int(q[0]))
ans = sorted(ans)
print(new[0][1], "\n", *ans, file=open(... | 3 | |
255 | A | Greg's Workout | PROGRAMMING | 800 | [
"implementation"
] | null | null | Greg is a beginner bodybuilder. Today the gym coach gave him the training plan. All it had was *n* integers *a*1,<=*a*2,<=...,<=*a**n*. These numbers mean that Greg needs to do exactly *n* exercises today. Besides, Greg should repeat the *i*-th in order exercise *a**i* times.
Greg now only does three types of exercise... | The first line contains integer *n* (1<=≤<=*n*<=≤<=20). The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=25) — the number of times Greg repeats the exercises. | Print word "chest" (without the quotes), if the chest gets the most exercise, "biceps" (without the quotes), if the biceps gets the most exercise and print "back" (without the quotes) if the back gets the most exercise.
It is guaranteed that the input is such that the answer to the problem is unambiguous. | [
"2\n2 8\n",
"3\n5 1 10\n",
"7\n3 3 2 7 9 6 8\n"
] | [
"biceps\n",
"back\n",
"chest\n"
] | In the first sample Greg does 2 chest, 8 biceps and zero back exercises, so the biceps gets the most exercises.
In the second sample Greg does 5 chest, 1 biceps and 10 back exercises, so the back gets the most exercises.
In the third sample Greg does 18 chest, 12 biceps and 8 back exercises, so the chest gets the mos... | 500 | [
{
"input": "2\n2 8",
"output": "biceps"
},
{
"input": "3\n5 1 10",
"output": "back"
},
{
"input": "7\n3 3 2 7 9 6 8",
"output": "chest"
},
{
"input": "4\n5 6 6 2",
"output": "chest"
},
{
"input": "5\n8 2 2 6 3",
"output": "chest"
},
{
"input": "6\n8 7 ... | 1,673,379,635 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 3 | 92 | 0 | exe = int(input())
train = list(map(int, input().split()))
training = {"chest":0, "biceps":0, "back":0}
for i in range(1, exe+1):
if i % 2 and i % 3:
training["chest"] += train[i - 1]
elif i % 3:
training["biceps"] += train[i-1]
else:
training["back"] += train[i-1]
print(li... | Title: Greg's Workout
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Greg is a beginner bodybuilder. Today the gym coach gave him the training plan. All it had was *n* integers *a*1,<=*a*2,<=...,<=*a**n*. These numbers mean that Greg needs to do exactly *n* exercises today. Besides, Greg ... | ```python
exe = int(input())
train = list(map(int, input().split()))
training = {"chest":0, "biceps":0, "back":0}
for i in range(1, exe+1):
if i % 2 and i % 3:
training["chest"] += train[i - 1]
elif i % 3:
training["biceps"] += train[i-1]
else:
training["back"] += train[i-1]... | 0 | |
54 | A | Presents | PROGRAMMING | 1,300 | [
"implementation"
] | A. Presents | 2 | 256 | The Hedgehog likes to give presents to his friend, but no less he likes to receive them.
Having received another present today, the Hedgehog suddenly understood that he has no place to put it as there was no room left on the special shelf in the cupboard. He will have to choose another shelf, but which one should he c... | The first line contains integers *N* and *K* (1<=≤<=*N*<=≤<=365, 1<=≤<=*K*<=≤<=*N*).
The second line contains a number *C* which represents the number of holidays (0<=≤<=*C*<=≤<=*N*). Then in the same line follow *C* numbers ranging from 1 to *N* which are the numbers of holiday days. The numbers are given in the incr... | Print a single number — the minimal number of presents the Hedgehog will receive over the following *N* days. | [
"5 2\n1 3\n",
"10 1\n3 6 7 8\n"
] | [
"3",
"10"
] | none | 500 | [
{
"input": "5 2\n1 3",
"output": "3"
},
{
"input": "10 1\n3 6 7 8",
"output": "10"
},
{
"input": "5 5\n1 3",
"output": "1"
},
{
"input": "10 3\n3 3 6 9",
"output": "3"
},
{
"input": "5 2\n0",
"output": "2"
},
{
"input": "1 1\n0",
"output": "1"
},... | 1,650,932,272 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 60 | 0 | n,k = map(int, input().split())
a = list(map(int, input().split()))
midx = a.pop(0)
a.sort()
cnt = 0
idx = 0
for i in range(n):
if i % k == 0:
cnt += 1
elif idx < midx and i + 1 == a[idx]:
cnt += 1
idx += 1
print(cnt) | Title: Presents
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
The Hedgehog likes to give presents to his friend, but no less he likes to receive them.
Having received another present today, the Hedgehog suddenly understood that he has no place to put it as there was no room left on the spec... | ```python
n,k = map(int, input().split())
a = list(map(int, input().split()))
midx = a.pop(0)
a.sort()
cnt = 0
idx = 0
for i in range(n):
if i % k == 0:
cnt += 1
elif idx < midx and i + 1 == a[idx]:
cnt += 1
idx += 1
print(cnt)
``` | 0 |
214 | A | System of Equations | PROGRAMMING | 800 | [
"brute force"
] | null | null | Furik loves math lessons very much, so he doesn't attend them, unlike Rubik. But now Furik wants to get a good mark for math. For that Ms. Ivanova, his math teacher, gave him a new task. Furik solved the task immediately. Can you?
You are given a system of equations:
You should count, how many there are pairs of int... | A single line contains two integers *n*,<=*m* (1<=≤<=*n*,<=*m*<=≤<=1000) — the parameters of the system. The numbers on the line are separated by a space. | On a single line print the answer to the problem. | [
"9 3\n",
"14 28\n",
"4 20\n"
] | [
"1\n",
"1\n",
"0\n"
] | In the first sample the suitable pair is integers (3, 0). In the second sample the suitable pair is integers (3, 5). In the third sample there is no suitable pair. | 500 | [
{
"input": "9 3",
"output": "1"
},
{
"input": "14 28",
"output": "1"
},
{
"input": "4 20",
"output": "0"
},
{
"input": "18 198",
"output": "1"
},
{
"input": "22 326",
"output": "1"
},
{
"input": "26 104",
"output": "1"
},
{
"input": "14 10"... | 1,670,121,622 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 11 | 218 | 0 | n,m = map(int,input().split())
amt = 0
for a in range(max(n,m)):
for b in range(max(n,m)):
if((a ** 2) + b == n and a + (b ** 2) == m):
amt += 1
print(amt)
| Title: System of Equations
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Furik loves math lessons very much, so he doesn't attend them, unlike Rubik. But now Furik wants to get a good mark for math. For that Ms. Ivanova, his math teacher, gave him a new task. Furik solved the task immedi... | ```python
n,m = map(int,input().split())
amt = 0
for a in range(max(n,m)):
for b in range(max(n,m)):
if((a ** 2) + b == n and a + (b ** 2) == m):
amt += 1
print(amt)
``` | 0 | |
0 | none | none | none | 0 | [
"none"
] | null | null | A family consisting of father bear, mother bear and son bear owns three cars. Father bear can climb into the largest car and he likes it. Also, mother bear can climb into the middle car and she likes it. Moreover, son bear can climb into the smallest car and he likes it. It's known that the largest car is strictly larg... | You are given four integers *V*1, *V*2, *V*3, *V**m*(1<=≤<=*V**i*<=≤<=100) — sizes of father bear, mother bear, son bear and Masha, respectively. It's guaranteed that *V*1<=><=*V*2<=><=*V*3. | Output three integers — sizes of father bear's car, mother bear's car and son bear's car, respectively.
If there are multiple possible solutions, print any.
If there is no solution, print "-1" (without quotes). | [
"50 30 10 10\n",
"100 50 10 21\n"
] | [
"50\n30\n10\n",
"-1\n"
] | In first test case all conditions for cars' sizes are satisfied.
In second test case there is no answer, because Masha should be able to climb into smallest car (so size of smallest car in not less than 21), but son bear should like it, so maximum possible size of it is 20. | 0 | [
{
"input": "50 30 10 10",
"output": "50\n30\n10"
},
{
"input": "100 50 10 21",
"output": "-1"
},
{
"input": "100 50 19 10",
"output": "100\n50\n19"
},
{
"input": "99 50 25 49",
"output": "100\n99\n49"
},
{
"input": "3 2 1 1",
"output": "4\n3\n1"
},
{
"... | 1,514,039,363 | 1,463 | Python 3 | WRONG_ANSWER | PRETESTS | 3 | 61 | 5,529,600 | v1,v2,v3,vm = map(int,input().split())
ans = []
pr1 = []
pr2 = []
if vm > v1:
ans.append(-1)
elif vm > v2:
ans.append(-1)
elif vm > v3:
ans.append(-1)
else:
for i in range(0,v1+1):
flag = False
if (v1<=i) and (2*v1>=i):
ans.append(i)
flag = Tr... | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A family consisting of father bear, mother bear and son bear owns three cars. Father bear can climb into the largest car and he likes it. Also, mother bear can climb into the middle car and she likes it. Moreover, son bear can cli... | ```python
v1,v2,v3,vm = map(int,input().split())
ans = []
pr1 = []
pr2 = []
if vm > v1:
ans.append(-1)
elif vm > v2:
ans.append(-1)
elif vm > v3:
ans.append(-1)
else:
for i in range(0,v1+1):
flag = False
if (v1<=i) and (2*v1>=i):
ans.append(i)
... | 0 | |
38 | A | Army | PROGRAMMING | 800 | [
"implementation"
] | A. Army | 2 | 256 | The Berland Armed Forces System consists of *n* ranks that are numbered using natural numbers from 1 to *n*, where 1 is the lowest rank and *n* is the highest rank.
One needs exactly *d**i* years to rise from rank *i* to rank *i*<=+<=1. Reaching a certain rank *i* having not reached all the previous *i*<=-<=1 ranks is... | The first input line contains an integer *n* (2<=≤<=*n*<=≤<=100). The second line contains *n*<=-<=1 integers *d**i* (1<=≤<=*d**i*<=≤<=100). The third input line contains two integers *a* and *b* (1<=≤<=*a*<=<<=*b*<=≤<=*n*). The numbers on the lines are space-separated. | Print the single number which is the number of years that Vasya needs to rise from rank *a* to rank *b*. | [
"3\n5 6\n1 2\n",
"3\n5 6\n1 3\n"
] | [
"5\n",
"11\n"
] | none | 0 | [
{
"input": "3\n5 6\n1 2",
"output": "5"
},
{
"input": "3\n5 6\n1 3",
"output": "11"
},
{
"input": "2\n55\n1 2",
"output": "55"
},
{
"input": "3\n85 78\n1 3",
"output": "163"
},
{
"input": "4\n63 4 49\n2 3",
"output": "4"
},
{
"input": "5\n93 83 42 56\n... | 1,555,236,375 | 2,147,483,647 | Python 3 | OK | TESTS | 50 | 248 | 0 | x = int(input())
a = list(map(int,input().split()))
x1,z1 = map(int,input().split())
s = 0
for i in range(z1-x1):
s = s + a[x1-1+i]
print(s) | Title: Army
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
The Berland Armed Forces System consists of *n* ranks that are numbered using natural numbers from 1 to *n*, where 1 is the lowest rank and *n* is the highest rank.
One needs exactly *d**i* years to rise from rank *i* to rank *i*<=+<... | ```python
x = int(input())
a = list(map(int,input().split()))
x1,z1 = map(int,input().split())
s = 0
for i in range(z1-x1):
s = s + a[x1-1+i]
print(s)
``` | 3.938 |
27 | A | Next Test | PROGRAMMING | 1,200 | [
"implementation",
"sortings"
] | A. Next Test | 2 | 256 | «Polygon» is a system which allows to create programming tasks in a simple and professional way. When you add a test to the problem, the corresponding form asks you for the test index. As in most cases it is clear which index the next test will have, the system suggests the default value of the index. It is calculated ... | The first line contains one integer *n* (1<=≤<=*n*<=≤<=3000) — the amount of previously added tests. The second line contains *n* distinct integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=3000) — indexes of these tests. | Output the required default value for the next test index. | [
"3\n1 7 2\n"
] | [
"3\n"
] | none | 500 | [
{
"input": "1\n1",
"output": "2"
},
{
"input": "2\n2 1",
"output": "3"
},
{
"input": "3\n3 4 1",
"output": "2"
},
{
"input": "4\n6 4 3 5",
"output": "1"
},
{
"input": "5\n3 2 1 7 4",
"output": "5"
},
{
"input": "6\n4 1 2 5 3 7",
"output": "6"
},
... | 1,695,480,625 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 92 | 102,400 | n=int(input())
a=list(map(int,input().split()))
a.sort()
if(len(a)==a[-1]):
print(a[-1]+1)
else:
for j in range(1,a[-1]):
if(j not in a):
print(j)
break
| Title: Next Test
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
«Polygon» is a system which allows to create programming tasks in a simple and professional way. When you add a test to the problem, the corresponding form asks you for the test index. As in most cases it is clear which index the... | ```python
n=int(input())
a=list(map(int,input().split()))
a.sort()
if(len(a)==a[-1]):
print(a[-1]+1)
else:
for j in range(1,a[-1]):
if(j not in a):
print(j)
break
``` | 3.976809 |
1 | A | Theatre Square | PROGRAMMING | 1,000 | [
"math"
] | A. Theatre Square | 1 | 256 | Theatre Square in the capital city of Berland has a rectangular shape with the size *n*<=×<=*m* meters. On the occasion of the city's anniversary, a decision was taken to pave the Square with square granite flagstones. Each flagstone is of the size *a*<=×<=*a*.
What is the least number of flagstones needed to pave the... | The input contains three positive integer numbers in the first line: *n*,<=<=*m* and *a* (1<=≤<=<=*n*,<=*m*,<=*a*<=≤<=109). | Write the needed number of flagstones. | [
"6 6 4\n"
] | [
"4\n"
] | none | 0 | [
{
"input": "6 6 4",
"output": "4"
},
{
"input": "1 1 1",
"output": "1"
},
{
"input": "2 1 1",
"output": "2"
},
{
"input": "1 2 1",
"output": "2"
},
{
"input": "2 2 1",
"output": "4"
},
{
"input": "2 1 2",
"output": "1"
},
{
"input": "1 1 3"... | 1,690,359,739 | 2,147,483,647 | Python 3 | OK | TESTS | 20 | 46 | 0 | import math
def least_flagstones(I, m, a):
return math.ceil(I/a) * math.ceil(m/a)
I, m, a = map(int, input().split())
print(least_flagstones(I, m, a))
| Title: Theatre Square
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Theatre Square in the capital city of Berland has a rectangular shape with the size *n*<=×<=*m* meters. On the occasion of the city's anniversary, a decision was taken to pave the Square with square granite flagstones. Each ... | ```python
import math
def least_flagstones(I, m, a):
return math.ceil(I/a) * math.ceil(m/a)
I, m, a = map(int, input().split())
print(least_flagstones(I, m, a))
``` | 3.977 |
224 | A | Parallelepiped | PROGRAMMING | 1,100 | [
"brute force",
"geometry",
"math"
] | null | null | You've got a rectangular parallelepiped with integer edge lengths. You know the areas of its three faces that have a common vertex. Your task is to find the sum of lengths of all 12 edges of this parallelepiped. | The first and the single line contains three space-separated integers — the areas of the parallelepiped's faces. The area's values are positive (<=><=0) and do not exceed 104. It is guaranteed that there exists at least one parallelepiped that satisfies the problem statement. | Print a single number — the sum of all edges of the parallelepiped. | [
"1 1 1\n",
"4 6 6\n"
] | [
"12\n",
"28\n"
] | In the first sample the parallelepiped has sizes 1 × 1 × 1, in the second one — 2 × 2 × 3. | 500 | [
{
"input": "1 1 1",
"output": "12"
},
{
"input": "4 6 6",
"output": "28"
},
{
"input": "20 10 50",
"output": "68"
},
{
"input": "9 4 36",
"output": "56"
},
{
"input": "324 9 36",
"output": "184"
},
{
"input": "1333 93 129",
"output": "308"
},
{... | 1,572,727,020 | 2,147,483,647 | Python 3 | OK | TESTS | 27 | 218 | 0 |
# codeforces
# 224A
# solved 2018-11-10 14:37:27
ins = str(input())
s = list(map(int,ins.split()))
a = (s[0]*s[1]/s[2])**0.5
b = (s[0]*s[2]/s[1])**0.5
c = (s[1]*s[2]/s[0])**0.5
print(int((a+b+c)*4))
| Title: Parallelepiped
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You've got a rectangular parallelepiped with integer edge lengths. You know the areas of its three faces that have a common vertex. Your task is to find the sum of lengths of all 12 edges of this parallelepiped.
Input S... | ```python
# codeforces
# 224A
# solved 2018-11-10 14:37:27
ins = str(input())
s = list(map(int,ins.split()))
a = (s[0]*s[1]/s[2])**0.5
b = (s[0]*s[2]/s[1])**0.5
c = (s[1]*s[2]/s[0])**0.5
print(int((a+b+c)*4))
``` | 3 | |
908 | A | New Year and Counting Cards | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | Your friend has *n* cards.
You know that each card has a lowercase English letter on one side and a digit on the other.
Currently, your friend has laid out the cards on a table so only one side of each card is visible.
You would like to know if the following statement is true for cards that your friend owns: "If a c... | The first and only line of input will contain a string *s* (1<=≤<=|*s*|<=≤<=50), denoting the sides of the cards that you can see on the table currently. Each character of *s* is either a lowercase English letter or a digit. | Print a single integer, the minimum number of cards you must turn over to verify your claim. | [
"ee\n",
"z\n",
"0ay1\n"
] | [
"2\n",
"0\n",
"2\n"
] | In the first sample, we must turn over both cards. Note that even though both cards have the same letter, they could possibly have different numbers on the other side.
In the second sample, we don't need to turn over any cards. The statement is vacuously true, since you know your friend has no cards with a vowel on th... | 500 | [
{
"input": "ee",
"output": "2"
},
{
"input": "z",
"output": "0"
},
{
"input": "0ay1",
"output": "2"
},
{
"input": "0abcdefghijklmnopqrstuvwxyz1234567896",
"output": "10"
},
{
"input": "0a0a9e9e2i2i9o9o6u6u9z9z4x4x9b9b",
"output": "18"
},
{
"input": "01... | 1,579,288,428 | 2,147,483,647 | PyPy 3 | OK | TESTS | 38 | 156 | 0 | import sys
import math
import bisect
def main():
ans = 0
for c in input():
if c in 'aeiou':
ans += 1
elif ord(c) >= ord('0') and ord(c) <= ord('9'):
val = int(c)
if val % 2 == 1:
ans += 1
print(ans)
if __name__ == "__main__... | Title: New Year and Counting Cards
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Your friend has *n* cards.
You know that each card has a lowercase English letter on one side and a digit on the other.
Currently, your friend has laid out the cards on a table so only one side of each car... | ```python
import sys
import math
import bisect
def main():
ans = 0
for c in input():
if c in 'aeiou':
ans += 1
elif ord(c) >= ord('0') and ord(c) <= ord('9'):
val = int(c)
if val % 2 == 1:
ans += 1
print(ans)
if __name__ ==... | 3 | |
126 | B | Password | PROGRAMMING | 1,700 | [
"binary search",
"dp",
"hashing",
"string suffix structures",
"strings"
] | null | null | Asterix, Obelix and their temporary buddies Suffix and Prefix has finally found the Harmony temple. However, its doors were firmly locked and even Obelix had no luck opening them.
A little later they found a string *s*, carved on a rock below the temple's gates. Asterix supposed that that's the password that opens the... | You are given the string *s* whose length can vary from 1 to 106 (inclusive), consisting of small Latin letters. | Print the string *t*. If a suitable *t* string does not exist, then print "Just a legend" without the quotes. | [
"fixprefixsuffix\n",
"abcdabc\n"
] | [
"fix",
"Just a legend"
] | none | 1,000 | [
{
"input": "fixprefixsuffix",
"output": "fix"
},
{
"input": "abcdabc",
"output": "Just a legend"
},
{
"input": "qwertyqwertyqwerty",
"output": "qwerty"
},
{
"input": "papapapap",
"output": "papap"
},
{
"input": "aaaaaaaaaa",
"output": "aaaaaaaa"
},
{
"... | 1,529,264,356 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 9 | 154 | 0 |
s = input()
n = len(s)
l = []
c = 0
for i in range(n,0,-1):
if (s[:i+1] == s[n-i-1:]):
if s[:i+1] in s[1:n-1]:
print(s[:i+1])
c = 1
break
if c==0:
print('Just a legend')
| Title: Password
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Asterix, Obelix and their temporary buddies Suffix and Prefix has finally found the Harmony temple. However, its doors were firmly locked and even Obelix had no luck opening them.
A little later they found a string *s*, carve... | ```python
s = input()
n = len(s)
l = []
c = 0
for i in range(n,0,-1):
if (s[:i+1] == s[n-i-1:]):
if s[:i+1] in s[1:n-1]:
print(s[:i+1])
c = 1
break
if c==0:
print('Just a legend')
``` | 0 | |
1,005 | A | Tanya and Stairways | PROGRAMMING | 800 | [
"implementation"
] | null | null | Little girl Tanya climbs the stairs inside a multi-storey building. Every time Tanya climbs a stairway, she starts counting steps from $1$ to the number of steps in this stairway. She speaks every number aloud. For example, if she climbs two stairways, the first of which contains $3$ steps, and the second contains $4$ ... | The first line contains $n$ ($1 \le n \le 1000$) — the total number of numbers pronounced by Tanya.
The second line contains integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 1000$) — all the numbers Tanya pronounced while climbing the stairs, in order from the first to the last pronounced number. Passing a stairway wit... | In the first line, output $t$ — the number of stairways that Tanya climbed. In the second line, output $t$ numbers — the number of steps in each stairway she climbed. Write the numbers in the correct order of passage of the stairways. | [
"7\n1 2 3 1 2 3 4\n",
"4\n1 1 1 1\n",
"5\n1 2 3 4 5\n",
"5\n1 2 1 2 1\n"
] | [
"2\n3 4 ",
"4\n1 1 1 1 ",
"1\n5 ",
"3\n2 2 1 "
] | none | 0 | [
{
"input": "7\n1 2 3 1 2 3 4",
"output": "2\n3 4 "
},
{
"input": "4\n1 1 1 1",
"output": "4\n1 1 1 1 "
},
{
"input": "5\n1 2 3 4 5",
"output": "1\n5 "
},
{
"input": "5\n1 2 1 2 1",
"output": "3\n2 2 1 "
},
{
"input": "1\n1",
"output": "1\n1 "
},
{
"inp... | 1,658,776,848 | 2,147,483,647 | Python 3 | OK | TESTS | 16 | 46 | 0 | numbers_pronounced_by_Tanya = int(input())
number = list(map(int, input().split(' ')))
stairways = 0
number_of_steps_in_each_stairway = []
number.append(0)
for i in range(numbers_pronounced_by_Tanya):
if number[i + 1] == 1:
stairways += 1
number_of_steps_in_each_stairway.append(number[i])
stairw... | Title: Tanya and Stairways
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little girl Tanya climbs the stairs inside a multi-storey building. Every time Tanya climbs a stairway, she starts counting steps from $1$ to the number of steps in this stairway. She speaks every number aloud. For ... | ```python
numbers_pronounced_by_Tanya = int(input())
number = list(map(int, input().split(' ')))
stairways = 0
number_of_steps_in_each_stairway = []
number.append(0)
for i in range(numbers_pronounced_by_Tanya):
if number[i + 1] == 1:
stairways += 1
number_of_steps_in_each_stairway.append(number[i... | 3 | |
439 | A | Devu, the Singer and Churu, the Joker | PROGRAMMING | 900 | [
"greedy",
"implementation"
] | null | null | Devu is a renowned classical singer. He is invited to many big functions/festivals. Recently he was invited to "All World Classical Singing Festival". Other than Devu, comedian Churu was also invited.
Devu has provided organizers a list of the songs and required time for singing them. He will sing *n* songs, *i**th* s... | The first line contains two space separated integers *n*, *d* (1<=≤<=*n*<=≤<=100; 1<=≤<=*d*<=≤<=10000). The second line contains *n* space-separated integers: *t*1,<=*t*2,<=...,<=*t**n* (1<=≤<=*t**i*<=≤<=100). | If there is no way to conduct all the songs of Devu, output -1. Otherwise output the maximum number of jokes that Churu can crack in the grand event. | [
"3 30\n2 2 1\n",
"3 20\n2 1 1\n"
] | [
"5\n",
"-1\n"
] | Consider the first example. The duration of the event is 30 minutes. There could be maximum 5 jokes in the following way:
- First Churu cracks a joke in 5 minutes. - Then Devu performs the first song for 2 minutes. - Then Churu cracks 2 jokes in 10 minutes. - Now Devu performs second song for 2 minutes. - Then Ch... | 500 | [
{
"input": "3 30\n2 2 1",
"output": "5"
},
{
"input": "3 20\n2 1 1",
"output": "-1"
},
{
"input": "50 10000\n5 4 10 9 9 6 7 7 7 3 3 7 7 4 7 4 10 10 1 7 10 3 1 4 5 7 2 10 10 10 2 3 4 7 6 1 8 4 7 3 8 8 4 10 1 1 9 2 6 1",
"output": "1943"
},
{
"input": "50 10000\n4 7 15 9 11 12 ... | 1,567,618,712 | 2,147,483,647 | Python 3 | OK | TESTS | 26 | 109 | 0 | n,m=map(int,input().split())
l=list(map(int,input().split()))
k=sum(l)
if 10*(n-1)+k>m:
print(-1)
else:
print((10*(n-1)+(m-(k+10*(n-1))))//5) | Title: Devu, the Singer and Churu, the Joker
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Devu is a renowned classical singer. He is invited to many big functions/festivals. Recently he was invited to "All World Classical Singing Festival". Other than Devu, comedian Churu was also invit... | ```python
n,m=map(int,input().split())
l=list(map(int,input().split()))
k=sum(l)
if 10*(n-1)+k>m:
print(-1)
else:
print((10*(n-1)+(m-(k+10*(n-1))))//5)
``` | 3 | |
818 | A | Diplomas and Certificates | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | There are *n* students who have taken part in an olympiad. Now it's time to award the students.
Some of them will receive diplomas, some wiil get certificates, and others won't receive anything. Students with diplomas and certificates are called winners. But there are some rules of counting the number of diplomas and ... | The first (and the only) line of input contains two integers *n* and *k* (1<=≤<=*n*,<=*k*<=≤<=1012), where *n* is the number of students and *k* is the ratio between the number of certificates and the number of diplomas. | Output three numbers: the number of students with diplomas, the number of students with certificates and the number of students who are not winners in case when the number of winners is maximum possible.
It's possible that there are no winners. | [
"18 2\n",
"9 10\n",
"1000000000000 5\n",
"1000000000000 499999999999\n"
] | [
"3 6 9\n",
"0 0 9\n",
"83333333333 416666666665 500000000002\n",
"1 499999999999 500000000000\n"
] | none | 0 | [
{
"input": "18 2",
"output": "3 6 9"
},
{
"input": "9 10",
"output": "0 0 9"
},
{
"input": "1000000000000 5",
"output": "83333333333 416666666665 500000000002"
},
{
"input": "1000000000000 499999999999",
"output": "1 499999999999 500000000000"
},
{
"input": "1 1",... | 1,588,581,104 | 2,147,483,647 | PyPy 3 | OK | TESTS | 44 | 140 | 0 | a,b = map(int,input().split())
z = a//2
x =z//(b+1)
print(x,b*x,a-(b+1)*x) | Title: Diplomas and Certificates
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There are *n* students who have taken part in an olympiad. Now it's time to award the students.
Some of them will receive diplomas, some wiil get certificates, and others won't receive anything. Students with... | ```python
a,b = map(int,input().split())
z = a//2
x =z//(b+1)
print(x,b*x,a-(b+1)*x)
``` | 3 | |
545 | C | Woodcutters | PROGRAMMING | 1,500 | [
"dp",
"greedy"
] | null | null | Little Susie listens to fairy tales before bed every day. Today's fairy tale was about wood cutters and the little girl immediately started imagining the choppers cutting wood. She imagined the situation that is described below.
There are *n* trees located along the road at points with coordinates *x*1,<=*x*2,<=...,<=... | The first line contains integer *n* (1<=≤<=*n*<=≤<=105) — the number of trees.
Next *n* lines contain pairs of integers *x**i*,<=*h**i* (1<=≤<=*x**i*,<=*h**i*<=≤<=109) — the coordinate and the height of the *і*-th tree.
The pairs are given in the order of ascending *x**i*. No two trees are located at the point with t... | Print a single number — the maximum number of trees that you can cut down by the given rules. | [
"5\n1 2\n2 1\n5 10\n10 9\n19 1\n",
"5\n1 2\n2 1\n5 10\n10 9\n20 1\n"
] | [
"3\n",
"4\n"
] | In the first sample you can fell the trees like that:
- fell the 1-st tree to the left — now it occupies segment [ - 1;1] - fell the 2-nd tree to the right — now it occupies segment [2;3] - leave the 3-rd tree — it occupies point 5 - leave the 4-th tree — it occupies point 10 - fell the 5-th tree to the right — ... | 1,750 | [
{
"input": "5\n1 2\n2 1\n5 10\n10 9\n19 1",
"output": "3"
},
{
"input": "5\n1 2\n2 1\n5 10\n10 9\n20 1",
"output": "4"
},
{
"input": "4\n10 4\n15 1\n19 3\n20 1",
"output": "4"
},
{
"input": "35\n1 7\n3 11\n6 12\n7 6\n8 5\n9 11\n15 3\n16 10\n22 2\n23 3\n25 7\n27 3\n34 5\n35 10... | 1,666,704,235 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 67 | 748 | 19,660,800 | n=int(input())
tree=[]
s=set()
for i in range(n):
tree.append(list(map(int,input().split())))
ans=1
for i in range(1,n-1):
if tree[i][1]<tree[i][0]-tree[i-1][0]:
ans=ans+1
elif tree[i][1]<tree[i+1][0]-tree[i][0]:
tree[i][0]=tree[i][0]+tree[i][1]
ans=ans+1
ans=ans+1
if n=... | Title: Woodcutters
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little Susie listens to fairy tales before bed every day. Today's fairy tale was about wood cutters and the little girl immediately started imagining the choppers cutting wood. She imagined the situation that is described b... | ```python
n=int(input())
tree=[]
s=set()
for i in range(n):
tree.append(list(map(int,input().split())))
ans=1
for i in range(1,n-1):
if tree[i][1]<tree[i][0]-tree[i-1][0]:
ans=ans+1
elif tree[i][1]<tree[i+1][0]-tree[i][0]:
tree[i][0]=tree[i][0]+tree[i][1]
ans=ans+1
ans=an... | 3 | |
573 | A | Bear and Poker | PROGRAMMING | 1,300 | [
"implementation",
"math",
"number theory"
] | null | null | Limak is an old brown bear. He often plays poker with his friends. Today they went to a casino. There are *n* players (including Limak himself) and right now all of them have bids on the table. *i*-th of them has bid with size *a**i* dollars.
Each player can double his bid any number of times and triple his bid any nu... | First line of input contains an integer *n* (2<=≤<=*n*<=≤<=105), the number of players.
The second line contains *n* integer numbers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=109) — the bids of players. | Print "Yes" (without the quotes) if players can make their bids become equal, or "No" otherwise. | [
"4\n75 150 75 50\n",
"3\n100 150 250\n"
] | [
"Yes\n",
"No\n"
] | In the first sample test first and third players should double their bids twice, second player should double his bid once and fourth player should both double and triple his bid.
It can be shown that in the second sample test there is no way to make all bids equal. | 500 | [
{
"input": "4\n75 150 75 50",
"output": "Yes"
},
{
"input": "3\n100 150 250",
"output": "No"
},
{
"input": "7\n34 34 68 34 34 68 34",
"output": "Yes"
},
{
"input": "10\n72 96 12 18 81 20 6 2 54 1",
"output": "No"
},
{
"input": "20\n958692492 954966768 77387000 724... | 1,544,905,592 | 2,147,483,647 | Python 3 | OK | TESTS | 70 | 467 | 8,908,800 | def cal(x):
while x % 2 == 0:
x = x/2
while x % 3 == 0:
x = x / 3
return x
n = int(input())
a = list(map(int, input().strip().split(' ')))
flag = 1
test = cal(a[0])
for i in range(n):
if cal(a[i]) != test:
flag = 0
break
if flag == 1:
print("Yes")
... | Title: Bear and Poker
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Limak is an old brown bear. He often plays poker with his friends. Today they went to a casino. There are *n* players (including Limak himself) and right now all of them have bids on the table. *i*-th of them has bid wit... | ```python
def cal(x):
while x % 2 == 0:
x = x/2
while x % 3 == 0:
x = x / 3
return x
n = int(input())
a = list(map(int, input().strip().split(' ')))
flag = 1
test = cal(a[0])
for i in range(n):
if cal(a[i]) != test:
flag = 0
break
if flag == 1:
prin... | 3 | |
80 | A | Panoramix's Prediction | PROGRAMMING | 800 | [
"brute force"
] | A. Panoramix's Prediction | 2 | 256 | A prime number is a number which has exactly two distinct divisors: one and itself. For example, numbers 2, 7, 3 are prime, and 1, 6, 4 are not.
The next prime number after *x* is the smallest prime number greater than *x*. For example, the next prime number after 2 is 3, and the next prime number after 3 is 5. Note t... | The first and only input line contains two positive integers — *n* and *m* (2<=≤<=*n*<=<<=*m*<=≤<=50). It is guaranteed that *n* is prime.
Pretests contain all the cases with restrictions 2<=≤<=*n*<=<<=*m*<=≤<=4. | Print YES, if *m* is the next prime number after *n*, or NO otherwise. | [
"3 5\n",
"7 11\n",
"7 9\n"
] | [
"YES",
"YES",
"NO"
] | none | 500 | [
{
"input": "3 5",
"output": "YES"
},
{
"input": "7 11",
"output": "YES"
},
{
"input": "7 9",
"output": "NO"
},
{
"input": "2 3",
"output": "YES"
},
{
"input": "2 4",
"output": "NO"
},
{
"input": "3 4",
"output": "NO"
},
{
"input": "3 5",
... | 1,665,213,264 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 3 | 92 | 0 | n,m = map(int,input().split())
numbers = set(range(3,51))
sushu = []
for i in numbers:
for x in range(2,i):
if i % x == 0:
break
else:
sushu.append(i)
nn = sushu.index(n)
if sushu[nn+1] == m:
print('YES')
else:
print('NO') | Title: Panoramix's Prediction
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
A prime number is a number which has exactly two distinct divisors: one and itself. For example, numbers 2, 7, 3 are prime, and 1, 6, 4 are not.
The next prime number after *x* is the smallest prime number greater t... | ```python
n,m = map(int,input().split())
numbers = set(range(3,51))
sushu = []
for i in numbers:
for x in range(2,i):
if i % x == 0:
break
else:
sushu.append(i)
nn = sushu.index(n)
if sushu[nn+1] == m:
print('YES')
else:
print('NO')
``` | -1 |
711 | A | Bus to Udayland | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | ZS the Coder and Chris the Baboon are travelling to Udayland! To get there, they have to get on the special IOI bus. The IOI bus has *n* rows of seats. There are 4 seats in each row, and the seats are separated into pairs by a walkway. When ZS and Chris came, some places in the bus was already occupied.
ZS and Chris a... | The first line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of rows of seats in the bus.
Then, *n* lines follow. Each line contains exactly 5 characters, the first two of them denote the first pair of seats in the row, the third character denotes the walkway (it always equals '|') and t... | If it is possible for Chris and ZS to sit at neighbouring empty seats, print "YES" (without quotes) in the first line. In the next *n* lines print the bus configuration, where the characters in the pair of seats for Chris and ZS is changed with characters '+'. Thus the configuration should differ from the input one by ... | [
"6\nOO|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX\n",
"4\nXO|OX\nXO|XX\nOX|OX\nXX|OX\n",
"5\nXX|XX\nXX|XX\nXO|OX\nXO|OO\nOX|XO\n"
] | [
"YES\n++|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX\n",
"NO\n",
"YES\nXX|XX\nXX|XX\nXO|OX\nXO|++\nOX|XO\n"
] | Note that the following is an incorrect configuration for the first sample case because the seats must be in the same pair.
O+|+X
XO|XX
OX|OO
XX|OX
OO|OO
OO|XX | 500 | [
{
"input": "6\nOO|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX",
"output": "YES\n++|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX"
},
{
"input": "4\nXO|OX\nXO|XX\nOX|OX\nXX|OX",
"output": "NO"
},
{
"input": "5\nXX|XX\nXX|XX\nXO|OX\nXO|OO\nOX|XO",
"output": "YES\nXX|XX\nXX|XX\nXO|OX\nXO|++\nOX|XO"
... | 1,611,132,555 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 4 | 46 | 0 | n=int(input())
li,f,s=[],0,""
for i in range(n):
k=input()
if "OO" in k and f==0:
s=k.replace("OO","++")
f=1
li.append(s)
else:
li.append(k)
if f==1:
print("YES")
for m in li:
print(m)
else:
print("NO") | Title: Bus to Udayland
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
ZS the Coder and Chris the Baboon are travelling to Udayland! To get there, they have to get on the special IOI bus. The IOI bus has *n* rows of seats. There are 4 seats in each row, and the seats are separated into pai... | ```python
n=int(input())
li,f,s=[],0,""
for i in range(n):
k=input()
if "OO" in k and f==0:
s=k.replace("OO","++")
f=1
li.append(s)
else:
li.append(k)
if f==1:
print("YES")
for m in li:
print(m)
else:
print("NO")
``` | 0 | |
59 | A | Word | PROGRAMMING | 800 | [
"implementation",
"strings"
] | A. Word | 2 | 256 | Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it either only consisted of lowercase letters or, vice versa, only of uppercase ones. At th... | The first line contains a word *s* — it consists of uppercase and lowercase Latin letters and possesses the length from 1 to 100. | Print the corrected word *s*. If the given word *s* has strictly more uppercase letters, make the word written in the uppercase register, otherwise - in the lowercase one. | [
"HoUse\n",
"ViP\n",
"maTRIx\n"
] | [
"house\n",
"VIP\n",
"matrix\n"
] | none | 500 | [
{
"input": "HoUse",
"output": "house"
},
{
"input": "ViP",
"output": "VIP"
},
{
"input": "maTRIx",
"output": "matrix"
},
{
"input": "BNHWpnpawg",
"output": "bnhwpnpawg"
},
{
"input": "VTYGP",
"output": "VTYGP"
},
{
"input": "CHNenu",
"output": "chn... | 1,689,019,149 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 30 | 124 | 0 | def change_letter_case(word):
upper_count = sum(1 for c in word if c.isupper())
lower_count = len(word) - upper_count
if upper_count > lower_count:
return word.upper()
elif lower_count > upper_count:
return word.lower()
else:
return word.lower()
# Test the functi... | Title: Word
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it ei... | ```python
def change_letter_case(word):
upper_count = sum(1 for c in word if c.isupper())
lower_count = len(word) - upper_count
if upper_count > lower_count:
return word.upper()
elif lower_count > upper_count:
return word.lower()
else:
return word.lower()
# Test ... | 3.969 |
393 | A | Nineteen | PROGRAMMING | 0 | [] | null | null | Alice likes word "nineteen" very much. She has a string *s* and wants the string to contain as many such words as possible. For that reason she can rearrange the letters of the string.
For example, if she has string "xiineteenppnnnewtnee", she can get string "xnineteenppnineteenw", containing (the occurrences marked) ... | The first line contains a non-empty string *s*, consisting only of lowercase English letters. The length of string *s* doesn't exceed 100. | Print a single integer — the maximum number of "nineteen"s that she can get in her string. | [
"nniinneetteeeenn\n",
"nneteenabcnneteenabcnneteenabcnneteenabcnneteenabcii\n",
"nineteenineteen\n"
] | [
"2",
"2",
"2"
] | none | 500 | [
{
"input": "nniinneetteeeenn",
"output": "2"
},
{
"input": "nneteenabcnneteenabcnneteenabcnneteenabcnneteenabcii",
"output": "2"
},
{
"input": "nineteenineteen",
"output": "2"
},
{
"input": "nssemsnnsitjtihtthij",
"output": "0"
},
{
"input": "eehihnttehtherjsihihn... | 1,553,281,519 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 10 | 93 | 0 | s = input()
num_n = 0
num_i = 0
num_e = 0
num_t = 0
for i in s:
if i == 'n':
num_n += 1
elif i == 'i':
num_i += 1
elif i == 'e':
num_e += 1
elif i == 't':
num_t += 1
if num_n >= 3:
num_n = num_n // 2
else:
num_n = 0
num_i = num_i // 1
num_e = num_e // 3
num_t = nu... | Title: Nineteen
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Alice likes word "nineteen" very much. She has a string *s* and wants the string to contain as many such words as possible. For that reason she can rearrange the letters of the string.
For example, if she has string "xiinetee... | ```python
s = input()
num_n = 0
num_i = 0
num_e = 0
num_t = 0
for i in s:
if i == 'n':
num_n += 1
elif i == 'i':
num_i += 1
elif i == 'e':
num_e += 1
elif i == 't':
num_t += 1
if num_n >= 3:
num_n = num_n // 2
else:
num_n = 0
num_i = num_i // 1
num_e = num_e // 3
... | 0 | |
439 | D | Devu and his Brother | PROGRAMMING | 1,700 | [
"binary search",
"sortings",
"ternary search",
"two pointers"
] | null | null | Devu and his brother love each other a lot. As they are super geeks, they only like to play with arrays. They are given two arrays *a* and *b* by their father. The array *a* is given to Devu and *b* to his brother.
As Devu is really a naughty kid, he wants the minimum value of his array *a* should be at least as much... | The first line contains two space-separated integers *n*, *m* (1<=≤<=*n*,<=*m*<=≤<=105). The second line will contain *n* space-separated integers representing content of the array *a* (1<=≤<=*a**i*<=≤<=109). The third line will contain *m* space-separated integers representing content of the array *b* (1<=≤<=*b**i*<=≤... | You need to output a single integer representing the minimum number of operations needed to satisfy Devu's condition. | [
"2 2\n2 3\n3 5\n",
"3 2\n1 2 3\n3 4\n",
"3 2\n4 5 6\n1 2\n"
] | [
"3\n",
"4\n",
"0\n"
] | In example 1, you can increase *a*<sub class="lower-index">1</sub> by 1 and decrease *b*<sub class="lower-index">2</sub> by 1 and then again decrease *b*<sub class="lower-index">2</sub> by 1. Now array *a* will be [3; 3] and array *b* will also be [3; 3]. Here minimum element of *a* is at least as large as maximum elem... | 2,000 | [
{
"input": "2 2\n2 3\n3 5",
"output": "3"
},
{
"input": "3 2\n1 2 3\n3 4",
"output": "4"
},
{
"input": "3 2\n4 5 6\n1 2",
"output": "0"
},
{
"input": "10 10\n23 100 38 38 73 54 59 69 44 86\n100 100 100 100 100 100 100 100 100 100",
"output": "416"
},
{
"input": "1... | 1,521,487,569 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 5 | 1,000 | 7,680,000 | n = [int(x) for x in input().split(" ")]
a = [int(x) for x in input().split(" ")]
b = [int(x) for x in input().split(" ")]
lo,hi,ans = 0, int(1e20), int(1e20)
while(lo<=hi):
c1,c2 = lo+(hi-lo)//3, hi-(hi-lo)//3
if c1 == lo and c2 == hi:
break
o1,o2 = 0,0
for i in range(n[0]):
... | Title: Devu and his Brother
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Devu and his brother love each other a lot. As they are super geeks, they only like to play with arrays. They are given two arrays *a* and *b* by their father. The array *a* is given to Devu and *b* to his brother.... | ```python
n = [int(x) for x in input().split(" ")]
a = [int(x) for x in input().split(" ")]
b = [int(x) for x in input().split(" ")]
lo,hi,ans = 0, int(1e20), int(1e20)
while(lo<=hi):
c1,c2 = lo+(hi-lo)//3, hi-(hi-lo)//3
if c1 == lo and c2 == hi:
break
o1,o2 = 0,0
for i in range(n[0]... | 0 | |
540 | A | Combination Lock | PROGRAMMING | 800 | [
"implementation"
] | null | null | Scrooge McDuck keeps his most treasured savings in a home safe with a combination lock. Each time he wants to put there the treasures that he's earned fair and square, he has to open the lock.
The combination lock is represented by *n* rotating disks with digits from 0 to 9 written on them. Scrooge McDuck has to turn ... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of disks on the combination lock.
The second line contains a string of *n* digits — the original state of the disks.
The third line contains a string of *n* digits — Scrooge McDuck's combination that opens the lock. | Print a single integer — the minimum number of moves Scrooge McDuck needs to open the lock. | [
"5\n82195\n64723\n"
] | [
"13\n"
] | In the sample he needs 13 moves:
- 1 disk: <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/b8967f65a723782358b93eff9ce69f336817cf70.png" style="max-width: 100.0%;max-height: 100.0%;"/> - 2 disk: <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/07fa58573ece0d32... | 500 | [
{
"input": "5\n82195\n64723",
"output": "13"
},
{
"input": "12\n102021090898\n010212908089",
"output": "16"
},
{
"input": "1\n8\n1",
"output": "3"
},
{
"input": "2\n83\n57",
"output": "7"
},
{
"input": "10\n0728592530\n1362615763",
"output": "27"
},
{
... | 1,608,552,847 | 2,147,483,647 | PyPy 3 | OK | TESTS | 43 | 155 | 0 | n=int(input())
x=list((input()))
y=list((input()))
c=0
for i in range(n):
s=abs(int(x[i])-(int(y[i])))
c+=min(s,10-s)
print(c) | Title: Combination Lock
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Scrooge McDuck keeps his most treasured savings in a home safe with a combination lock. Each time he wants to put there the treasures that he's earned fair and square, he has to open the lock.
The combination lock is ... | ```python
n=int(input())
x=list((input()))
y=list((input()))
c=0
for i in range(n):
s=abs(int(x[i])-(int(y[i])))
c+=min(s,10-s)
print(c)
``` | 3 | |
343 | A | Rational Resistance | PROGRAMMING | 1,600 | [
"math",
"number theory"
] | null | null | Mad scientist Mike is building a time machine in his spare time. To finish the work, he needs a resistor with a certain resistance value.
However, all Mike has is lots of identical resistors with unit resistance *R*0<==<=1. Elements with other resistance can be constructed from these resistors. In this problem, we wil... | The single input line contains two space-separated integers *a* and *b* (1<=≤<=*a*,<=*b*<=≤<=1018). It is guaranteed that the fraction is irreducible. It is guaranteed that a solution always exists. | Print a single number — the answer to the problem.
Please do not use the %lld specifier to read or write 64-bit integers in С++. It is recommended to use the cin, cout streams or the %I64d specifier. | [
"1 1\n",
"3 2\n",
"199 200\n"
] | [
"1\n",
"3\n",
"200\n"
] | In the first sample, one resistor is enough.
In the second sample one can connect the resistors in parallel, take the resulting element and connect it to a third resistor consecutively. Then, we get an element with resistance <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/5305da389756aab6... | 500 | [
{
"input": "1 1",
"output": "1"
},
{
"input": "3 2",
"output": "3"
},
{
"input": "199 200",
"output": "200"
},
{
"input": "1 1000000000000000000",
"output": "1000000000000000000"
},
{
"input": "3 1",
"output": "3"
},
{
"input": "21 8",
"output": "7... | 1,659,396,300 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 0 | 62 | 0 | def gcd(a,b):
iter=0
while b!=0:
iter+=a%b
a1=a
a=b
b=a1%b
return iter
import sys
a,b=map(int, sys.stdin.readline().split())
print(gcd(a,b)) | Title: Rational Resistance
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Mad scientist Mike is building a time machine in his spare time. To finish the work, he needs a resistor with a certain resistance value.
However, all Mike has is lots of identical resistors with unit resistance *R... | ```python
def gcd(a,b):
iter=0
while b!=0:
iter+=a%b
a1=a
a=b
b=a1%b
return iter
import sys
a,b=map(int, sys.stdin.readline().split())
print(gcd(a,b))
``` | 0 | |
985 | B | Switches and Lamps | PROGRAMMING | 1,200 | [
"implementation"
] | null | null | You are given *n* switches and *m* lamps. The *i*-th switch turns on some subset of the lamps. This information is given as the matrix *a* consisting of *n* rows and *m* columns where *a**i*,<=*j*<==<=1 if the *i*-th switch turns on the *j*-th lamp and *a**i*,<=*j*<==<=0 if the *i*-th switch is not connected to the *j*... | The first line of the input contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=2000) — the number of the switches and the number of the lamps.
The following *n* lines contain *m* characters each. The character *a**i*,<=*j* is equal to '1' if the *i*-th switch turns on the *j*-th lamp and '0' otherwise.
It is guar... | Print "YES" if there is a switch that if you will ignore it and press all the other *n*<=-<=1 switches then all *m* lamps will be turned on. Print "NO" if there is no such switch. | [
"4 5\n10101\n01000\n00111\n10000\n",
"4 5\n10100\n01000\n00110\n00101\n"
] | [
"YES\n",
"NO\n"
] | none | 0 | [
{
"input": "4 5\n10101\n01000\n00111\n10000",
"output": "YES"
},
{
"input": "4 5\n10100\n01000\n00110\n00101",
"output": "NO"
},
{
"input": "1 5\n11111",
"output": "NO"
},
{
"input": "10 1\n1\n0\n0\n0\n0\n0\n0\n0\n0\n1",
"output": "YES"
},
{
"input": "1 1\n1",
... | 1,670,150,630 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | """
https://codeforces.com/problemset/problem/985/B
"""
n, m = [int(x) for x in input().split()]
tableau = []
k = 2 ** n - 1
for i in range(n):
tableau.append(int(input(), 2))
resultat = False
for x in range(n):
nombre = 0
for y in range(n):
if y != x:
nombre |= tableau[y]
if nomb... | Title: Switches and Lamps
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given *n* switches and *m* lamps. The *i*-th switch turns on some subset of the lamps. This information is given as the matrix *a* consisting of *n* rows and *m* columns where *a**i*,<=*j*<==<=1 if the *i*-th... | ```python
"""
https://codeforces.com/problemset/problem/985/B
"""
n, m = [int(x) for x in input().split()]
tableau = []
k = 2 ** n - 1
for i in range(n):
tableau.append(int(input(), 2))
resultat = False
for x in range(n):
nombre = 0
for y in range(n):
if y != x:
nombre |= tableau[y]
... | 0 | |
40 | A | Find Color | PROGRAMMING | 1,300 | [
"constructive algorithms",
"geometry",
"implementation",
"math"
] | A. Find Color | 2 | 256 | Not so long ago as a result of combat operations the main Berland place of interest — the magic clock — was damaged. The cannon's balls made several holes in the clock, that's why the residents are concerned about the repair. The magic clock can be represented as an infinite Cartesian plane, where the origin correspond... | The first and single line contains two integers *x* and *y* — the coordinates of the hole made in the clock by the ball. Each of the numbers *x* and *y* has an absolute value that does not exceed 1000. | Find the required color.
All the points between which and the origin of coordinates the distance is integral-value are painted black. | [
"-2 1\n",
"2 1\n",
"4 3\n"
] | [
"white\n",
"black\n",
"black\n"
] | none | 500 | [
{
"input": "-2 1",
"output": "white"
},
{
"input": "2 1",
"output": "black"
},
{
"input": "4 3",
"output": "black"
},
{
"input": "3 3",
"output": "black"
},
{
"input": "4 4",
"output": "white"
},
{
"input": "-4 4",
"output": "black"
},
{
"i... | 1,474,938,909 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 17 | 218 | 0 | x,y = input().split()
x,y = int(x),int(y)
m = ((x**2+y**2)**.5)%2
c = 0<x*y
if(m>1):
c = not c
if(x==0 or y==0):
print("black")
else:
print(["white","black"][int(c)]) | Title: Find Color
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Not so long ago as a result of combat operations the main Berland place of interest — the magic clock — was damaged. The cannon's balls made several holes in the clock, that's why the residents are concerned about the repair. Th... | ```python
x,y = input().split()
x,y = int(x),int(y)
m = ((x**2+y**2)**.5)%2
c = 0<x*y
if(m>1):
c = not c
if(x==0 or y==0):
print("black")
else:
print(["white","black"][int(c)])
``` | 0 |
385 | C | Bear and Prime Numbers | PROGRAMMING | 1,700 | [
"binary search",
"brute force",
"data structures",
"dp",
"implementation",
"math",
"number theory"
] | null | null | Recently, the bear started studying data structures and faced the following problem.
You are given a sequence of integers *x*1,<=*x*2,<=...,<=*x**n* of length *n* and *m* queries, each of them is characterized by two integers *l**i*,<=*r**i*. Let's introduce *f*(*p*) to represent the number of such indexes *k*, that *... | The first line contains integer *n* (1<=≤<=*n*<=≤<=106). The second line contains *n* integers *x*1,<=*x*2,<=...,<=*x**n* (2<=≤<=*x**i*<=≤<=107). The numbers are not necessarily distinct.
The third line contains integer *m* (1<=≤<=*m*<=≤<=50000). Each of the following *m* lines contains a pair of space-separated integ... | Print *m* integers — the answers to the queries on the order the queries appear in the input. | [
"6\n5 5 7 10 14 15\n3\n2 11\n3 12\n4 4\n",
"7\n2 3 5 7 11 4 8\n2\n8 10\n2 123\n"
] | [
"9\n7\n0\n",
"0\n7\n"
] | Consider the first sample. Overall, the first sample has 3 queries.
1. The first query *l* = 2, *r* = 11 comes. You need to count *f*(2) + *f*(3) + *f*(5) + *f*(7) + *f*(11) = 2 + 1 + 4 + 2 + 0 = 9. 1. The second query comes *l* = 3, *r* = 12. You need to count *f*(3) + *f*(5) + *f*(7) + *f*(11) = 1 + 4 + 2 + 0 = 7.... | 1,500 | [
{
"input": "6\n5 5 7 10 14 15\n3\n2 11\n3 12\n4 4",
"output": "9\n7\n0"
},
{
"input": "7\n2 3 5 7 11 4 8\n2\n8 10\n2 123",
"output": "0\n7"
},
{
"input": "9\n50 50 50 50 50 50 50 50 50\n7\n20 20\n8 13\n13 13\n6 14\n3 5\n15 17\n341 1792",
"output": "0\n0\n0\n0\n9\n0\n0"
},
{
"... | 1,669,908,620 | 2,147,483,647 | PyPy 3 | OK | TESTS | 27 | 1,419 | 105,369,600 | from collections import defaultdict, deque, Counter
from functools import lru_cache, reduce
from heapq import heappush, heappop, heapify
from bisect import bisect_right, bisect_left
from random import randint
from math import *
import operator
import sys
from itertools import accumulate
from io import BytesIO, IOBas... | Title: Bear and Prime Numbers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Recently, the bear started studying data structures and faced the following problem.
You are given a sequence of integers *x*1,<=*x*2,<=...,<=*x**n* of length *n* and *m* queries, each of them is characterized b... | ```python
from collections import defaultdict, deque, Counter
from functools import lru_cache, reduce
from heapq import heappush, heappop, heapify
from bisect import bisect_right, bisect_left
from random import randint
from math import *
import operator
import sys
from itertools import accumulate
from io import Byte... | 3 | |
235 | A | LCM Challenge | PROGRAMMING | 1,600 | [
"number theory"
] | null | null | Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big number with it.
But I also don't want to use many numbers, so I'll choose three positive integers (they don't have to be distinct) which are not greater than *n*. Can you help me to find ... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=106) — the *n* mentioned in the statement. | Print a single integer — the maximum possible LCM of three not necessarily distinct positive integers that are not greater than *n*. | [
"9\n",
"7\n"
] | [
"504\n",
"210\n"
] | The least common multiple of some positive integers is the least positive integer which is multiple for each of them.
The result may become very large, 32-bit integer won't be enough. So using 64-bit integers is recommended.
For the last example, we can chose numbers 7, 6, 5 and the LCM of them is 7·6·5 = 210. It is ... | 500 | [
{
"input": "9",
"output": "504"
},
{
"input": "7",
"output": "210"
},
{
"input": "1",
"output": "1"
},
{
"input": "5",
"output": "60"
},
{
"input": "6",
"output": "60"
},
{
"input": "33",
"output": "32736"
},
{
"input": "21",
"output": ... | 1,620,639,002 | 2,147,483,647 | Python 3 | OK | TESTS | 87 | 466 | 6,963,200 | import sys
import math
n=int(input())
if(n==1):
print(1)
sys.exit(0)
if(n==2):
print(2)
sys.exit(0)
if(n==3):
print(6)
sys.exit(0)
if(n%2==1):
print(n*(n-1)*(n-2))
sys.exit(0)
def lcm(a,b):
return a*b//math.gcd(a,b)
ans=0
for i in range(max(1,n-50),n+1):
for j in range(max(1,n-50),n+1):
for k in range(max(1... | Title: LCM Challenge
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big number with it.
But I also don't want to use many numbers, so I'll choose three positive... | ```python
import sys
import math
n=int(input())
if(n==1):
print(1)
sys.exit(0)
if(n==2):
print(2)
sys.exit(0)
if(n==3):
print(6)
sys.exit(0)
if(n%2==1):
print(n*(n-1)*(n-2))
sys.exit(0)
def lcm(a,b):
return a*b//math.gcd(a,b)
ans=0
for i in range(max(1,n-50),n+1):
for j in range(max(1,n-50),n+1):
for k in r... | 3 | |
27 | A | Next Test | PROGRAMMING | 1,200 | [
"implementation",
"sortings"
] | A. Next Test | 2 | 256 | «Polygon» is a system which allows to create programming tasks in a simple and professional way. When you add a test to the problem, the corresponding form asks you for the test index. As in most cases it is clear which index the next test will have, the system suggests the default value of the index. It is calculated ... | The first line contains one integer *n* (1<=≤<=*n*<=≤<=3000) — the amount of previously added tests. The second line contains *n* distinct integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=3000) — indexes of these tests. | Output the required default value for the next test index. | [
"3\n1 7 2\n"
] | [
"3\n"
] | none | 500 | [
{
"input": "1\n1",
"output": "2"
},
{
"input": "2\n2 1",
"output": "3"
},
{
"input": "3\n3 4 1",
"output": "2"
},
{
"input": "4\n6 4 3 5",
"output": "1"
},
{
"input": "5\n3 2 1 7 4",
"output": "5"
},
{
"input": "6\n4 1 2 5 3 7",
"output": "6"
},
... | 1,564,989,362 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 186 | 0 | x= int(input())
y = list(map(int , input().split()))
f = 0
for i in range(1,x+1):
if( i not in y and f == 0):
print(i , end = "\n")
f = 1 | Title: Next Test
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
«Polygon» is a system which allows to create programming tasks in a simple and professional way. When you add a test to the problem, the corresponding form asks you for the test index. As in most cases it is clear which index the... | ```python
x= int(input())
y = list(map(int , input().split()))
f = 0
for i in range(1,x+1):
if( i not in y and f == 0):
print(i , end = "\n")
f = 1
``` | 0 |
304 | B | Calendar | PROGRAMMING | 1,300 | [
"brute force",
"implementation"
] | null | null | Calendars in widespread use today include the Gregorian calendar, which is the de facto international standard, and is used almost everywhere in the world for civil purposes. The Gregorian reform modified the Julian calendar's scheme of leap years as follows:
Every year that is exactly divisible by four is a leap yea... | The first two lines contain two dates, each date is in the format yyyy:mm:dd (1900<=≤<=*yyyy*<=≤<=2038 and yyyy:mm:dd is a legal date). | Print a single integer — the answer to the problem. | [
"1900:01:01\n2038:12:31\n",
"1996:03:09\n1991:11:12\n"
] | [
"50768\n",
"1579\n"
] | none | 1,000 | [
{
"input": "1900:01:01\n2038:12:31",
"output": "50768"
},
{
"input": "1996:03:09\n1991:11:12",
"output": "1579"
},
{
"input": "1999:12:31\n2000:02:29",
"output": "60"
},
{
"input": "1903:09:27\n1988:06:15",
"output": "30943"
},
{
"input": "1913:11:14\n1901:05:11",... | 1,697,780,033 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 1 | 154 | 5,734,400 | from datetime import date
d, m, y = map(int, input().split(':'))
d1 = date(d, m, y)
d, m, y = map(int, input().split(':'))
d2 = date(d, m, y)
print((d2 - d1).days) | Title: Calendar
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Calendars in widespread use today include the Gregorian calendar, which is the de facto international standard, and is used almost everywhere in the world for civil purposes. The Gregorian reform modified the Julian calendar's... | ```python
from datetime import date
d, m, y = map(int, input().split(':'))
d1 = date(d, m, y)
d, m, y = map(int, input().split(':'))
d2 = date(d, m, y)
print((d2 - d1).days)
``` | 0 | |
488 | A | Giga Tower | PROGRAMMING | 1,100 | [
"brute force"
] | null | null | Giga Tower is the tallest and deepest building in Cyberland. There are 17<=777<=777<=777 floors, numbered from <=-<=8<=888<=888<=888 to 8<=888<=888<=888. In particular, there is floor 0 between floor <=-<=1 and floor 1. Every day, thousands of tourists come to this place to enjoy the wonderful view.
In Cyberland, it ... | The only line of input contains an integer *a* (<=-<=109<=≤<=*a*<=≤<=109). | Print the minimum *b* in a line. | [
"179\n",
"-1\n",
"18\n"
] | [
"1\n",
"9\n",
"10\n"
] | For the first sample, he has to arrive at the floor numbered 180.
For the second sample, he will arrive at 8.
Note that *b* should be positive, so the answer for the third sample is 10, not 0. | 500 | [
{
"input": "179",
"output": "1"
},
{
"input": "-1",
"output": "9"
},
{
"input": "18",
"output": "10"
},
{
"input": "-410058385",
"output": "1"
},
{
"input": "-586825624",
"output": "1"
},
{
"input": "852318890",
"output": "1"
},
{
"input": ... | 1,473,870,045 | 2,147,483,647 | Python 3 | OK | TESTS | 35 | 108 | 2,048,000 | import re
from collections import Counter
from sys import stderr
from typing import Union, Generator, List, Tuple
import string
INF = 2e18 + 3
EPS = 1e-10
def main():
a = int(input())
b = 1
while '8' not in str(a + b):
b += 1
print(b)
if __name__ == '__main__':
main()
| Title: Giga Tower
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Giga Tower is the tallest and deepest building in Cyberland. There are 17<=777<=777<=777 floors, numbered from <=-<=8<=888<=888<=888 to 8<=888<=888<=888. In particular, there is floor 0 between floor <=-<=1 and floor 1. Ever... | ```python
import re
from collections import Counter
from sys import stderr
from typing import Union, Generator, List, Tuple
import string
INF = 2e18 + 3
EPS = 1e-10
def main():
a = int(input())
b = 1
while '8' not in str(a + b):
b += 1
print(b)
if __name__ == '__main__':
main()
``` | 3 | |
116 | A | Tram | PROGRAMMING | 800 | [
"implementation"
] | null | null | Linear Kingdom has exactly one tram line. It has *n* stops, numbered from 1 to *n* in the order of tram's movement. At the *i*-th stop *a**i* passengers exit the tram, while *b**i* passengers enter it. The tram is empty before it arrives at the first stop. Also, when the tram arrives at the last stop, all passengers ex... | The first line contains a single number *n* (2<=≤<=*n*<=≤<=1000) — the number of the tram's stops.
Then *n* lines follow, each contains two integers *a**i* and *b**i* (0<=≤<=*a**i*,<=*b**i*<=≤<=1000) — the number of passengers that exits the tram at the *i*-th stop, and the number of passengers that enter the tram at... | Print a single integer denoting the minimum possible capacity of the tram (0 is allowed). | [
"4\n0 3\n2 5\n4 2\n4 0\n"
] | [
"6\n"
] | For the first example, a capacity of 6 is sufficient:
- At the first stop, the number of passengers inside the tram before arriving is 0. Then, 3 passengers enter the tram, and the number of passengers inside the tram becomes 3. - At the second stop, 2 passengers exit the tram (1 passenger remains inside). Then, 5 ... | 500 | [
{
"input": "4\n0 3\n2 5\n4 2\n4 0",
"output": "6"
},
{
"input": "5\n0 4\n4 6\n6 5\n5 4\n4 0",
"output": "6"
},
{
"input": "10\n0 5\n1 7\n10 8\n5 3\n0 5\n3 3\n8 8\n0 6\n10 1\n9 0",
"output": "18"
},
{
"input": "3\n0 1\n1 1\n1 0",
"output": "1"
},
{
"input": "4\n0 1... | 1,692,273,168 | 2,147,483,647 | Python 3 | OK | TESTS | 71 | 124 | 0 | c=0
m=0
for _ in range(int(input())):
x,e=map(int,input().split())
c=c-x
c=c+e
if c>m:
m=c
print(m) | Title: Tram
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Linear Kingdom has exactly one tram line. It has *n* stops, numbered from 1 to *n* in the order of tram's movement. At the *i*-th stop *a**i* passengers exit the tram, while *b**i* passengers enter it. The tram is empty before it ... | ```python
c=0
m=0
for _ in range(int(input())):
x,e=map(int,input().split())
c=c-x
c=c+e
if c>m:
m=c
print(m)
``` | 3 | |
1,003 | A | Polycarp's Pockets | PROGRAMMING | 800 | [
"implementation"
] | null | null | Polycarp has $n$ coins, the value of the $i$-th coin is $a_i$. Polycarp wants to distribute all the coins between his pockets, but he cannot put two coins with the same value into the same pocket.
For example, if Polycarp has got six coins represented as an array $a = [1, 2, 4, 3, 3, 2]$, he can distribute the coins i... | The first line of the input contains one integer $n$ ($1 \le n \le 100$) — the number of coins.
The second line of the input contains $n$ integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 100$) — values of coins. | Print only one integer — the minimum number of pockets Polycarp needs to distribute all the coins so no two coins with the same value are put into the same pocket. | [
"6\n1 2 4 3 3 2\n",
"1\n100\n"
] | [
"2\n",
"1\n"
] | none | 0 | [
{
"input": "6\n1 2 4 3 3 2",
"output": "2"
},
{
"input": "1\n100",
"output": "1"
},
{
"input": "100\n100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100... | 1,632,750,340 | 2,147,483,647 | Python 3 | OK | TESTS | 37 | 62 | 6,963,200 | # Hydro submission #6151cb01e1e9420537150a48@1632750338314
n = int(input())
arr = input()
arr = [int(value) for value in arr.split(' ')]
def Polycarp_Pockets(a: [int]):
count, count2, number = 0, 0, 0
for i in range(len(a)):
number = a[i]
for j in range(len(a)):
if a[j] =... | Title: Polycarp's Pockets
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Polycarp has $n$ coins, the value of the $i$-th coin is $a_i$. Polycarp wants to distribute all the coins between his pockets, but he cannot put two coins with the same value into the same pocket.
For example, if Po... | ```python
# Hydro submission #6151cb01e1e9420537150a48@1632750338314
n = int(input())
arr = input()
arr = [int(value) for value in arr.split(' ')]
def Polycarp_Pockets(a: [int]):
count, count2, number = 0, 0, 0
for i in range(len(a)):
number = a[i]
for j in range(len(a)):
... | 3 | |
90 | A | Cableway | PROGRAMMING | 1,000 | [
"greedy",
"math"
] | A. Cableway | 2 | 256 | A group of university students wants to get to the top of a mountain to have a picnic there. For that they decided to use a cableway.
A cableway is represented by some cablecars, hanged onto some cable stations by a cable. A cable is scrolled cyclically between the first and the last cable stations (the first of them ... | The first line contains three integers *r*, *g* and *b* (0<=≤<=*r*,<=*g*,<=*b*<=≤<=100). It is guaranteed that *r*<=+<=*g*<=+<=*b*<=><=0, it means that the group consists of at least one student. | Print a single number — the minimal time the students need for the whole group to ascend to the top of the mountain. | [
"1 3 2\n",
"3 2 1\n"
] | [
"34",
"33"
] | Let's analyze the first sample.
At the moment of time 0 a red cablecar comes and one student from the *r* group get on it and ascends to the top at the moment of time 30.
At the moment of time 1 a green cablecar arrives and two students from the *g* group get on it; they get to the top at the moment of time 31.
At t... | 500 | [
{
"input": "1 3 2",
"output": "34"
},
{
"input": "3 2 1",
"output": "33"
},
{
"input": "3 5 2",
"output": "37"
},
{
"input": "10 10 10",
"output": "44"
},
{
"input": "29 7 24",
"output": "72"
},
{
"input": "28 94 13",
"output": "169"
},
{
"... | 1,619,615,782 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 154 | 0 | def solve(arr):
max_val = max(arr)
n = 0
for i,v in enumerate(arr):
if max_val == v:
if i == 0:
n = 0
elif i == 1:
n = 1
else:
n = 2
break
if max_val %2 != 0 :
max_val += 1
return 30+n+3*(... | Title: Cableway
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
A group of university students wants to get to the top of a mountain to have a picnic there. For that they decided to use a cableway.
A cableway is represented by some cablecars, hanged onto some cable stations by a cable. A cabl... | ```python
def solve(arr):
max_val = max(arr)
n = 0
for i,v in enumerate(arr):
if max_val == v:
if i == 0:
n = 0
elif i == 1:
n = 1
else:
n = 2
break
if max_val %2 != 0 :
max_val += 1
retur... | 0 |
677 | A | Vanya and Fence | PROGRAMMING | 800 | [
"implementation"
] | null | null | Vanya and his friends are walking along the fence of height *h* and they do not want the guard to notice them. In order to achieve this the height of each of the friends should not exceed *h*. If the height of some person is greater than *h* he can bend down and then he surely won't be noticed by the guard. The height ... | The first line of the input contains two integers *n* and *h* (1<=≤<=*n*<=≤<=1000, 1<=≤<=*h*<=≤<=1000) — the number of friends and the height of the fence, respectively.
The second line contains *n* integers *a**i* (1<=≤<=*a**i*<=≤<=2*h*), the *i*-th of them is equal to the height of the *i*-th person. | Print a single integer — the minimum possible valid width of the road. | [
"3 7\n4 5 14\n",
"6 1\n1 1 1 1 1 1\n",
"6 5\n7 6 8 9 10 5\n"
] | [
"4\n",
"6\n",
"11\n"
] | In the first sample, only person number 3 must bend down, so the required width is equal to 1 + 1 + 2 = 4.
In the second sample, all friends are short enough and no one has to bend, so the width 1 + 1 + 1 + 1 + 1 + 1 = 6 is enough.
In the third sample, all the persons have to bend, except the last one. The required m... | 500 | [
{
"input": "3 7\n4 5 14",
"output": "4"
},
{
"input": "6 1\n1 1 1 1 1 1",
"output": "6"
},
{
"input": "6 5\n7 6 8 9 10 5",
"output": "11"
},
{
"input": "10 420\n214 614 297 675 82 740 174 23 255 15",
"output": "13"
},
{
"input": "10 561\n657 23 1096 487 785 66 481... | 1,693,171,452 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 31 | 0 | n =input() # Change the value of n as per your requirement
h =input() # Change the value of h as per your requirement
result = []
for i in range(n):
value = int(input(
f"Enter value {i + 1}: ")) # You can modify this line to get input from user or use a different data source
if value > h... | Title: Vanya and Fence
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vanya and his friends are walking along the fence of height *h* and they do not want the guard to notice them. In order to achieve this the height of each of the friends should not exceed *h*. If the height of some pers... | ```python
n =input() # Change the value of n as per your requirement
h =input() # Change the value of h as per your requirement
result = []
for i in range(n):
value = int(input(
f"Enter value {i + 1}: ")) # You can modify this line to get input from user or use a different data source
if... | -1 | |
143 | A | Help Vasilisa the Wise 2 | PROGRAMMING | 1,000 | [
"brute force",
"math"
] | null | null | Vasilisa the Wise from the Kingdom of Far Far Away got a magic box with a secret as a present from her friend Hellawisa the Wise from the Kingdom of A Little Closer. However, Vasilisa the Wise does not know what the box's secret is, since she cannot open it again. She hopes that you will help her one more time with tha... | The input contains numbers written on the edges of the lock of the box. The first line contains space-separated integers *r*1 and *r*2 that define the required sums of numbers in the rows of the square. The second line contains space-separated integers *c*1 and *c*2 that define the required sums of numbers in the colum... | Print the scheme of decorating the box with stones: two lines containing two space-separated integers from 1 to 9. The numbers should be pairwise different. If there is no solution for the given lock, then print the single number "-1" (without the quotes).
If there are several solutions, output any. | [
"3 7\n4 6\n5 5\n",
"11 10\n13 8\n5 16\n",
"1 2\n3 4\n5 6\n",
"10 10\n10 10\n10 10\n"
] | [
"1 2\n3 4\n",
"4 7\n9 1\n",
"-1\n",
"-1\n"
] | Pay attention to the last test from the statement: it is impossible to open the box because for that Vasilisa the Wise would need 4 identical gems containing number "5". However, Vasilisa only has one gem with each number from 1 to 9. | 500 | [
{
"input": "3 7\n4 6\n5 5",
"output": "1 2\n3 4"
},
{
"input": "11 10\n13 8\n5 16",
"output": "4 7\n9 1"
},
{
"input": "1 2\n3 4\n5 6",
"output": "-1"
},
{
"input": "10 10\n10 10\n10 10",
"output": "-1"
},
{
"input": "5 13\n8 10\n11 7",
"output": "3 2\n5 8"
... | 1,689,788,176 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 50 | 62 | 0 | r1, r2 = map(int, input().split())
c1, c2 = map(int, input().split())
d1, d2 = map(int, input().split())
g3 = (c1 + d2 - r1) // 2
g4 = g3 + d1 - c1
g2 = g3 + r1 - c1
g1 = r1 - g2
if (g1 > 0 and g1 < 10) and (g2 > 0 and g2 < 10) and (g3 > 0 and g3 < 10) and (g4 > 0 and g4 < 10) and len(set([g1, g2, g3, g4])) ... | Title: Help Vasilisa the Wise 2
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasilisa the Wise from the Kingdom of Far Far Away got a magic box with a secret as a present from her friend Hellawisa the Wise from the Kingdom of A Little Closer. However, Vasilisa the Wise does not know wha... | ```python
r1, r2 = map(int, input().split())
c1, c2 = map(int, input().split())
d1, d2 = map(int, input().split())
g3 = (c1 + d2 - r1) // 2
g4 = g3 + d1 - c1
g2 = g3 + r1 - c1
g1 = r1 - g2
if (g1 > 0 and g1 < 10) and (g2 > 0 and g2 < 10) and (g3 > 0 and g3 < 10) and (g4 > 0 and g4 < 10) and len(set([g1, g2, ... | 0 | |
141 | A | Amusing Joke | PROGRAMMING | 800 | [
"implementation",
"sortings",
"strings"
] | null | null | So, the New Year holidays are over. Santa Claus and his colleagues can take a rest and have guests at last. When two "New Year and Christmas Men" meet, thear assistants cut out of cardboard the letters from the guest's name and the host's name in honor of this event. Then the hung the letters above the main entrance. O... | The input file consists of three lines: the first line contains the guest's name, the second line contains the name of the residence host and the third line contains letters in a pile that were found at the door in the morning. All lines are not empty and contain only uppercase Latin letters. The length of each line do... | Print "YES" without the quotes, if the letters in the pile could be permuted to make the names of the "New Year and Christmas Men". Otherwise, print "NO" without the quotes. | [
"SANTACLAUS\nDEDMOROZ\nSANTAMOROZDEDCLAUS\n",
"PAPAINOEL\nJOULUPUKKI\nJOULNAPAOILELUPUKKI\n",
"BABBONATALE\nFATHERCHRISTMAS\nBABCHRISTMASBONATALLEFATHER\n"
] | [
"YES\n",
"NO\n",
"NO\n"
] | In the first sample the letters written in the last line can be used to write the names and there won't be any extra letters left.
In the second sample letter "P" is missing from the pile and there's an extra letter "L".
In the third sample there's an extra letter "L". | 500 | [
{
"input": "SANTACLAUS\nDEDMOROZ\nSANTAMOROZDEDCLAUS",
"output": "YES"
},
{
"input": "PAPAINOEL\nJOULUPUKKI\nJOULNAPAOILELUPUKKI",
"output": "NO"
},
{
"input": "BABBONATALE\nFATHERCHRISTMAS\nBABCHRISTMASBONATALLEFATHER",
"output": "NO"
},
{
"input": "B\nA\nAB",
"output": ... | 1,687,002,184 | 2,147,483,647 | Python 3 | OK | TESTS | 54 | 92 | 0 | a = input()
b = input()
c = input()
d = a + b
kq = "YES"
for i in range(ord("A"),ord("Z")+1):
if d.count(chr(i)) != c.count(chr(i)):
kq = "NO"
print(kq) | Title: Amusing Joke
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
So, the New Year holidays are over. Santa Claus and his colleagues can take a rest and have guests at last. When two "New Year and Christmas Men" meet, thear assistants cut out of cardboard the letters from the guest's nam... | ```python
a = input()
b = input()
c = input()
d = a + b
kq = "YES"
for i in range(ord("A"),ord("Z")+1):
if d.count(chr(i)) != c.count(chr(i)):
kq = "NO"
print(kq)
``` | 3 | |
347 | B | Fixed Points | PROGRAMMING | 1,100 | [
"brute force",
"implementation",
"math"
] | null | null | A permutation of length *n* is an integer sequence such that each integer from 0 to (*n*<=-<=1) appears exactly once in it. For example, sequence [0,<=2,<=1] is a permutation of length 3 while both [0,<=2,<=2] and [1,<=2,<=3] are not.
A fixed point of a function is a point that is mapped to itself by the function. A p... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=105). The second line contains *n* integers *a*0,<=*a*1,<=...,<=*a**n*<=-<=1 — the given permutation. | Print a single integer — the maximum possible number of fixed points in the permutation after at most one swap operation. | [
"5\n0 1 3 4 2\n"
] | [
"3\n"
] | none | 1,000 | [
{
"input": "5\n0 1 3 4 2",
"output": "3"
},
{
"input": "10\n6 9 4 7 8 2 3 5 0 1",
"output": "2"
},
{
"input": "100\n99 5 40 32 4 31 38 57 94 47 26 16 89 72 9 80 55 86 78 90 42 41 46 74 56 97 21 48 66 27 93 85 88 59 64 95 10 45 12 22 84 60 8 98 62 51 14 65 39 30 11 71 92 19 76 43 87 54 15... | 1,530,476,424 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 248 | 0 | n=int(input())
l=list(map(int,input().split()))
j=0
c=0
for i in range(n):
if l[i]!=i and j==0:
l[l.index(i)]=l[i]
j=1
elif l[i]!=i and j==1:
c=1
break
if c:
print(i)
else:
print(i+1)
| Title: Fixed Points
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A permutation of length *n* is an integer sequence such that each integer from 0 to (*n*<=-<=1) appears exactly once in it. For example, sequence [0,<=2,<=1] is a permutation of length 3 while both [0,<=2,<=2] and [1,<=2,<... | ```python
n=int(input())
l=list(map(int,input().split()))
j=0
c=0
for i in range(n):
if l[i]!=i and j==0:
l[l.index(i)]=l[i]
j=1
elif l[i]!=i and j==1:
c=1
break
if c:
print(i)
else:
print(i+1)
``` | 0 | |
58 | A | Chat room | PROGRAMMING | 1,000 | [
"greedy",
"strings"
] | A. Chat room | 1 | 256 | Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letters can be deleted from the typed word so that it resulted in the word "hello". For example, ... | The first and only line contains the word *s*, which Vasya typed. This word consisits of small Latin letters, its length is no less that 1 and no more than 100 letters. | If Vasya managed to say hello, print "YES", otherwise print "NO". | [
"ahhellllloou\n",
"hlelo\n"
] | [
"YES\n",
"NO\n"
] | none | 500 | [
{
"input": "ahhellllloou",
"output": "YES"
},
{
"input": "hlelo",
"output": "NO"
},
{
"input": "helhcludoo",
"output": "YES"
},
{
"input": "hehwelloho",
"output": "YES"
},
{
"input": "pnnepelqomhhheollvlo",
"output": "YES"
},
{
"input": "tymbzjyqhymeda... | 1,695,171,188 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 40 | 62 | 0 | # -*- coding: utf-8 -*-
"""
Created on Wed Sep 20 08:45:41 2023
@author: Pomfret Du
"""
word = [*input()]
aim = ['h','e','l','l','o']
for i in word[::-1]:
try:
if i == aim[-1]:
aim.pop(-1)
except:
continue
if aim == []:
print('YES')
else:
print('NO') | Title: Chat room
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letter... | ```python
# -*- coding: utf-8 -*-
"""
Created on Wed Sep 20 08:45:41 2023
@author: Pomfret Du
"""
word = [*input()]
aim = ['h','e','l','l','o']
for i in word[::-1]:
try:
if i == aim[-1]:
aim.pop(-1)
except:
continue
if aim == []:
print('YES')
else:
print('... | 3.969 |
867 | A | Between the Offices | PROGRAMMING | 800 | [
"implementation"
] | null | null | As you may know, MemSQL has American offices in both San Francisco and Seattle. Being a manager in the company, you travel a lot between the two cities, always by plane.
You prefer flying from Seattle to San Francisco than in the other direction, because it's warmer in San Francisco. You are so busy that you don't rem... | The first line of input contains single integer *n* (2<=≤<=*n*<=≤<=100) — the number of days.
The second line contains a string of length *n* consisting of only capital 'S' and 'F' letters. If the *i*-th letter is 'S', then you were in Seattle office on that day. Otherwise you were in San Francisco. The days are given... | Print "YES" if you flew more times from Seattle to San Francisco, and "NO" otherwise.
You can print each letter in any case (upper or lower). | [
"4\nFSSF\n",
"2\nSF\n",
"10\nFFFFFFFFFF\n",
"10\nSSFFSFFSFF\n"
] | [
"NO\n",
"YES\n",
"NO\n",
"YES\n"
] | In the first example you were initially at San Francisco, then flew to Seattle, were there for two days and returned to San Francisco. You made one flight in each direction, so the answer is "NO".
In the second example you just flew from Seattle to San Francisco, so the answer is "YES".
In the third example you staye... | 500 | [
{
"input": "4\nFSSF",
"output": "NO"
},
{
"input": "2\nSF",
"output": "YES"
},
{
"input": "10\nFFFFFFFFFF",
"output": "NO"
},
{
"input": "10\nSSFFSFFSFF",
"output": "YES"
},
{
"input": "20\nSFSFFFFSSFFFFSSSSFSS",
"output": "NO"
},
{
"input": "20\nSSFFF... | 1,619,951,769 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 62 | 0 | # # RED CODER # #
n = int(input())
x = input()
for i in range(n-1):
if x[i] == "s" and x[i+1] == "F":
print("YES")
break
else:
print("NO")
break | Title: Between the Offices
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
As you may know, MemSQL has American offices in both San Francisco and Seattle. Being a manager in the company, you travel a lot between the two cities, always by plane.
You prefer flying from Seattle to San Franci... | ```python
# # RED CODER # #
n = int(input())
x = input()
for i in range(n-1):
if x[i] == "s" and x[i+1] == "F":
print("YES")
break
else:
print("NO")
break
``` | 0 | |
575 | H | Bots | PROGRAMMING | 1,800 | [
"combinatorics",
"dp",
"math",
"number theory"
] | null | null | Sasha and Ira are two best friends. But they aren’t just friends, they are software engineers and experts in artificial intelligence. They are developing an algorithm for two bots playing a two-player game. The game is cooperative and turn based. In each turn, one of the players makes a move (it doesn’t matter which pl... | The first and only line contains integer N.
- 1<=≤<=*N*<=≤<=106 | Output should contain a single integer – number of possible states modulo 109<=+<=7. | [
"2\n"
] | [
"19\n"
] | Start: Game is in state A.
- Turn 1: Either bot can make a move (first bot is red and second bot is blue), so there are two possible states after the first turn – B and C. - Turn 2: In both states B and C, either bot can again make a turn, so the list of possible states is expanded to include D, E, F and G. - Turn... | 0 | [
{
"input": "2",
"output": "19"
},
{
"input": "1",
"output": "5"
},
{
"input": "3",
"output": "69"
},
{
"input": "4",
"output": "251"
},
{
"input": "5",
"output": "923"
},
{
"input": "6",
"output": "3431"
},
{
"input": "7",
"output": "12... | 1,441,534,676 | 8,276 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 77 | 0 | from math import pi, factorial
n = int(input())
print(((factorial(2 * n + 2)//((factorial(n))*(factorial(n)))) - 1) % (10**9 + 7)) | Title: Bots
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Sasha and Ira are two best friends. But they aren’t just friends, they are software engineers and experts in artificial intelligence. They are developing an algorithm for two bots playing a two-player game. The game is cooperative... | ```python
from math import pi, factorial
n = int(input())
print(((factorial(2 * n + 2)//((factorial(n))*(factorial(n)))) - 1) % (10**9 + 7))
``` | 0 | |
558 | B | Amr and The Large Array | PROGRAMMING | 1,300 | [
"implementation"
] | null | null | Amr has got a large array of size *n*. Amr doesn't like large arrays so he intends to make it smaller.
Amr doesn't care about anything in the array except the beauty of it. The beauty of the array is defined to be the maximum number of times that some number occurs in this array. He wants to choose the smallest subseg... | The first line contains one number *n* (1<=≤<=*n*<=≤<=105), the size of the array.
The second line contains *n* integers *a**i* (1<=≤<=*a**i*<=≤<=106), representing elements of the array. | Output two integers *l*,<=*r* (1<=≤<=*l*<=≤<=*r*<=≤<=*n*), the beginning and the end of the subsegment chosen respectively.
If there are several possible answers you may output any of them. | [
"5\n1 1 2 2 1\n",
"5\n1 2 2 3 1\n",
"6\n1 2 2 1 1 2\n"
] | [
"1 5",
"2 3",
"1 5"
] | A subsegment *B* of an array *A* from *l* to *r* is an array of size *r* - *l* + 1 where *B*<sub class="lower-index">*i*</sub> = *A*<sub class="lower-index">*l* + *i* - 1</sub> for all 1 ≤ *i* ≤ *r* - *l* + 1 | 1,000 | [
{
"input": "5\n1 1 2 2 1",
"output": "1 5"
},
{
"input": "5\n1 2 2 3 1",
"output": "2 3"
},
{
"input": "6\n1 2 2 1 1 2",
"output": "1 5"
},
{
"input": "10\n1 1000000 2 1000000 3 2 1000000 1 2 1",
"output": "2 7"
},
{
"input": "10\n1 2 3 4 5 5 1 2 3 4",
"output... | 1,436,888,771 | 2,171 | Python 3 | TIME_LIMIT_EXCEEDED | PRETESTS | 3 | 1,000 | 8,806,400 | n=int(input())
a=list(map(int,input().split(' ')))
c=[]
for i in range(n):
c.append(a[-i-1])
m=n
b=[]
for i in range(max(a)+1):
b.append(0)
for i in a:
b[i]+=1
e=[]
for i in range(0,len(b)):
if b[i]==max(b):
e.append(i)
for q in e:
x=a.index(q)
y=c.index(q)
m=min(n-... | Title: Amr and The Large Array
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Amr has got a large array of size *n*. Amr doesn't like large arrays so he intends to make it smaller.
Amr doesn't care about anything in the array except the beauty of it. The beauty of the array is defined to... | ```python
n=int(input())
a=list(map(int,input().split(' ')))
c=[]
for i in range(n):
c.append(a[-i-1])
m=n
b=[]
for i in range(max(a)+1):
b.append(0)
for i in a:
b[i]+=1
e=[]
for i in range(0,len(b)):
if b[i]==max(b):
e.append(i)
for q in e:
x=a.index(q)
y=c.index(q)
... | 0 | |
106 | B | Choosing Laptop | PROGRAMMING | 1,000 | [
"brute force",
"implementation"
] | B. Choosing Laptop | 2 | 256 | Vasya is choosing a laptop. The shop has *n* laptops to all tastes.
Vasya is interested in the following properties: processor speed, ram and hdd. Vasya is a programmer and not a gamer which is why he is not interested in all other properties.
If all three properties of a laptop are strictly less than those propertie... | The first line contains number *n* (1<=≤<=*n*<=≤<=100).
Then follow *n* lines. Each describes a laptop as *speed* *ram* *hdd* *cost*. Besides,
- *speed*, *ram*, *hdd* and *cost* are integers - 1000<=≤<=*speed*<=≤<=4200 is the processor's speed in megahertz - 256<=≤<=*ram*<=≤<=4096 the RAM volume in megabytes - 1... | Print a single number — the number of a laptop Vasya will choose. The laptops are numbered with positive integers from 1 to *n* in the order in which they are given in the input data. | [
"5\n2100 512 150 200\n2000 2048 240 350\n2300 1024 200 320\n2500 2048 80 300\n2000 512 180 150\n"
] | [
"4"
] | In the third sample Vasya considers the first and fifth laptops outdated as all of their properties cannot match those of the third laptop. The fourth one is the cheapest among the laptops that are left. Thus, Vasya chooses the fourth laptop. | 1,000 | [
{
"input": "5\n2100 512 150 200\n2000 2048 240 350\n2300 1024 200 320\n2500 2048 80 300\n2000 512 180 150",
"output": "4"
},
{
"input": "2\n1500 500 50 755\n1600 600 80 700",
"output": "2"
},
{
"input": "2\n1500 512 50 567\n1600 400 70 789",
"output": "1"
},
{
"input": "4\n10... | 1,631,740,384 | 2,147,483,647 | Python 3 | OK | TESTS | 55 | 154 | 6,963,200 | #106B (86No. Problem B)
n = int(input())
des = []
for i in range(n):
t = list(map(int,input().split()))
des.append(t)
price = 1001
for i in range(n):
flag = 0
for j in range(n):
if des[i][0] < des[j][0] and des[i][1] < des[j][1] and des[i][2] < des[j][2]:
flag = 1
break
if (fl... | Title: Choosing Laptop
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya is choosing a laptop. The shop has *n* laptops to all tastes.
Vasya is interested in the following properties: processor speed, ram and hdd. Vasya is a programmer and not a gamer which is why he is not interested in ... | ```python
#106B (86No. Problem B)
n = int(input())
des = []
for i in range(n):
t = list(map(int,input().split()))
des.append(t)
price = 1001
for i in range(n):
flag = 0
for j in range(n):
if des[i][0] < des[j][0] and des[i][1] < des[j][1] and des[i][2] < des[j][2]:
flag = 1
break... | 3.94853 |
435 | A | Queue on Bus Stop | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | It's that time of the year when the Russians flood their countryside summer cottages (dachas) and the bus stop has a lot of people. People rarely go to the dacha on their own, it's usually a group, so the people stand in queue by groups.
The bus stop queue has *n* groups of people. The *i*-th group from the beginning ... | The first line contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=100). The next line contains *n* integers: *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=*m*). | Print a single integer — the number of buses that is needed to transport all *n* groups to the dacha countryside. | [
"4 3\n2 3 2 1\n",
"3 4\n1 2 1\n"
] | [
"3\n",
"1\n"
] | none | 500 | [
{
"input": "4 3\n2 3 2 1",
"output": "3"
},
{
"input": "3 4\n1 2 1",
"output": "1"
},
{
"input": "1 5\n4",
"output": "1"
},
{
"input": "5 1\n1 1 1 1 1",
"output": "5"
},
{
"input": "6 4\n1 3 2 3 4 1",
"output": "5"
},
{
"input": "6 8\n6 1 1 1 4 5",
... | 1,499,508,470 | 2,147,483,647 | Python 3 | OK | TESTS | 34 | 78 | 5,529,600 | string = input()
numbers = string.split()
a = int(numbers[1])
string = input()
numbers = list(map(int, string.split()))
n = 0
while len(numbers) != 0:
b = 0
for x in numbers[:]:
b += x
if b > a:
break
numbers.remove(x)
n += 1
print(n) | Title: Queue on Bus Stop
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
It's that time of the year when the Russians flood their countryside summer cottages (dachas) and the bus stop has a lot of people. People rarely go to the dacha on their own, it's usually a group, so the people stand... | ```python
string = input()
numbers = string.split()
a = int(numbers[1])
string = input()
numbers = list(map(int, string.split()))
n = 0
while len(numbers) != 0:
b = 0
for x in numbers[:]:
b += x
if b > a:
break
numbers.remove(x)
n += 1
print(n)
``` | 3 | |
47 | B | Coins | PROGRAMMING | 1,200 | [
"implementation"
] | B. Coins | 2 | 256 | One day Vasya came across three Berland coins. They didn't have any numbers that's why Vasya didn't understand how their denominations differ. He supposed that if one coin is heavier than the other one, then it should be worth more. Vasya weighed all the three pairs of coins on pan balance scales and told you the resul... | The input data contains the results of all the weighting, one result on each line. It is guaranteed that every coin pair was weighted exactly once. Vasya labelled the coins with letters «A», «B» and «C». Each result is a line that appears as (letter)(> or < sign)(letter). For example, if coin "A" proved lighter t... | It the results are contradictory, print Impossible. Otherwise, print without spaces the rearrangement of letters «A», «B» and «C» which represent the coins in the increasing order of their weights. | [
"A>B\nC<B\nA>C\n",
"A<B\nB>C\nC>A\n"
] | [
"CBA",
"ACB"
] | none | 1,000 | [
{
"input": "A>B\nC<B\nA>C",
"output": "CBA"
},
{
"input": "A<B\nB>C\nC>A",
"output": "ACB"
},
{
"input": "A<C\nB<A\nB>C",
"output": "Impossible"
},
{
"input": "A<B\nA<C\nB>C",
"output": "ACB"
},
{
"input": "B>A\nC<B\nC>A",
"output": "ACB"
},
{
"input":... | 1,679,061,627 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 60 | 0 | a, b = map(int, input().split())
res = 0
c = 0
if b % a == 0:
print(int(b / a))
else:
while res <= b:
res = res + a
c += 1
print(c) | Title: Coins
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
One day Vasya came across three Berland coins. They didn't have any numbers that's why Vasya didn't understand how their denominations differ. He supposed that if one coin is heavier than the other one, then it should be worth more. ... | ```python
a, b = map(int, input().split())
res = 0
c = 0
if b % a == 0:
print(int(b / a))
else:
while res <= b:
res = res + a
c += 1
print(c)
``` | -1 |
909 | A | Generate Login | PROGRAMMING | 1,000 | [
"brute force",
"greedy",
"sortings"
] | null | null | The preferred way to generate user login in Polygon is to concatenate a prefix of the user's first name and a prefix of their last name, in that order. Each prefix must be non-empty, and any of the prefixes can be the full name. Typically there are multiple possible logins for each person.
You are given the first and ... | The input consists of a single line containing two space-separated strings: the first and the last names. Each character of each string is a lowercase English letter. The length of each string is between 1 and 10, inclusive. | Output a single string — alphabetically earliest possible login formed from these names. The output should be given in lowercase as well. | [
"harry potter\n",
"tom riddle\n"
] | [
"hap\n",
"tomr\n"
] | none | 500 | [
{
"input": "harry potter",
"output": "hap"
},
{
"input": "tom riddle",
"output": "tomr"
},
{
"input": "a qdpinbmcrf",
"output": "aq"
},
{
"input": "wixjzniiub ssdfodfgap",
"output": "wis"
},
{
"input": "z z",
"output": "zz"
},
{
"input": "ertuyivhfg v"... | 1,649,499,351 | 2,147,483,647 | Python 3 | OK | TESTS | 64 | 46 | 0 | im, nazw = input().split(' ')
n = nazw[0]
res = im[0]
im = im[1:]
#print(im, nazw)
for i in im:
if (ord(i)<ord(n)):
res += i
else:
break
res += n
print(res) | Title: Generate Login
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The preferred way to generate user login in Polygon is to concatenate a prefix of the user's first name and a prefix of their last name, in that order. Each prefix must be non-empty, and any of the prefixes can be the fu... | ```python
im, nazw = input().split(' ')
n = nazw[0]
res = im[0]
im = im[1:]
#print(im, nazw)
for i in im:
if (ord(i)<ord(n)):
res += i
else:
break
res += n
print(res)
``` | 3 | |
69 | A | Young Physicist | PROGRAMMING | 1,000 | [
"implementation",
"math"
] | A. Young Physicist | 2 | 256 | A guy named Vasya attends the final grade of a high school. One day Vasya decided to watch a match of his favorite hockey team. And, as the boy loves hockey very much, even more than physics, he forgot to do the homework. Specifically, he forgot to complete his physics tasks. Next day the teacher got very angry at Vasy... | The first line contains a positive integer *n* (1<=≤<=*n*<=≤<=100), then follow *n* lines containing three integers each: the *x**i* coordinate, the *y**i* coordinate and the *z**i* coordinate of the force vector, applied to the body (<=-<=100<=≤<=*x**i*,<=*y**i*,<=*z**i*<=≤<=100). | Print the word "YES" if the body is in equilibrium, or the word "NO" if it is not. | [
"3\n4 1 7\n-2 4 -1\n1 -5 -3\n",
"3\n3 -1 7\n-5 2 -4\n2 -1 -3\n"
] | [
"NO",
"YES"
] | none | 500 | [
{
"input": "3\n4 1 7\n-2 4 -1\n1 -5 -3",
"output": "NO"
},
{
"input": "3\n3 -1 7\n-5 2 -4\n2 -1 -3",
"output": "YES"
},
{
"input": "10\n21 32 -46\n43 -35 21\n42 2 -50\n22 40 20\n-27 -9 38\n-4 1 1\n-40 6 -31\n-13 -2 34\n-21 34 -12\n-32 -29 41",
"output": "NO"
},
{
"input": "10... | 1,611,497,153 | 2,147,483,647 | Python 3 | OK | TESTS | 81 | 154 | 0 | s1=0
s2=0
s3=0
for i in range(int(input())):
l=list(map(int,input().split()))
s1=s1+l[0]
s2=s2+l[1]
s3=s3+l[2]
if s1==0 and s2==0 and s3==0:
print("YES")
else:
print("NO") | Title: Young Physicist
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
A guy named Vasya attends the final grade of a high school. One day Vasya decided to watch a match of his favorite hockey team. And, as the boy loves hockey very much, even more than physics, he forgot to do the homework. S... | ```python
s1=0
s2=0
s3=0
for i in range(int(input())):
l=list(map(int,input().split()))
s1=s1+l[0]
s2=s2+l[1]
s3=s3+l[2]
if s1==0 and s2==0 and s3==0:
print("YES")
else:
print("NO")
``` | 3.9615 |
628 | D | Magic Numbers | PROGRAMMING | 2,200 | [
"dp"
] | null | null | Consider the decimal presentation of an integer. Let's call a number d-magic if digit *d* appears in decimal presentation of the number on even positions and nowhere else.
For example, the numbers 1727374, 17, 1 are 7-magic but 77, 7, 123, 34, 71 are not 7-magic. On the other hand the number 7 is 0-magic, 123 is 2-mag... | The first line contains two integers *m*,<=*d* (1<=≤<=*m*<=≤<=2000, 0<=≤<=*d*<=≤<=9) — the parameters from the problem statement.
The second line contains positive integer *a* in decimal presentation (without leading zeroes).
The third line contains positive integer *b* in decimal presentation (without leading zeroes... | Print the only integer *a* — the remainder after dividing by 109<=+<=7 of the number of d-magic numbers in segment [*a*,<=*b*] that are multiple of *m*. | [
"2 6\n10\n99\n",
"2 0\n1\n9\n",
"19 7\n1000\n9999\n"
] | [
"8\n",
"4\n",
"6\n"
] | The numbers from the answer of the first example are 16, 26, 36, 46, 56, 76, 86 and 96.
The numbers from the answer of the second example are 2, 4, 6 and 8.
The numbers from the answer of the third example are 1767, 2717, 5757, 6707, 8797 and 9747. | 0 | [
{
"input": "2 6\n10\n99",
"output": "8"
},
{
"input": "2 0\n1\n9",
"output": "4"
},
{
"input": "19 7\n1000\n9999",
"output": "6"
},
{
"input": "9 4\n33\n52",
"output": "0"
},
{
"input": "10 8\n18\n59",
"output": "0"
},
{
"input": "43 3\n587\n850",
... | 1,676,371,755 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 0 | 2,000 | 99,430,400 | import sys;
mod = 1000 * 1000 * 1000 + 7
nmax = 2021
z = []
def init():
z.clear()
for i in range(nmax):
z.append([])
for j in range(nmax):
z[i].append([])
for k in range(2):
z[i][j].append(0)
# print(z)
def add(a, b):
if a +... | Title: Magic Numbers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Consider the decimal presentation of an integer. Let's call a number d-magic if digit *d* appears in decimal presentation of the number on even positions and nowhere else.
For example, the numbers 1727374, 17, 1 are 7-ma... | ```python
import sys;
mod = 1000 * 1000 * 1000 + 7
nmax = 2021
z = []
def init():
z.clear()
for i in range(nmax):
z.append([])
for j in range(nmax):
z[i].append([])
for k in range(2):
z[i][j].append(0)
# print(z)
def add(a, b):
... | 0 | |
110 | A | Nearly Lucky Number | PROGRAMMING | 800 | [
"implementation"
] | A. Nearly Lucky Number | 2 | 256 | Petya loves lucky numbers. We all know that lucky numbers are the positive integers whose decimal representations contain only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.
Unfortunately, not all numbers are lucky. Petya calls a number nearly lucky if the number of lucky d... | The only line contains an integer *n* (1<=≤<=*n*<=≤<=1018).
Please do not use the %lld specificator to read or write 64-bit numbers in С++. It is preferred to use the cin, cout streams or the %I64d specificator. | Print on the single line "YES" if *n* is a nearly lucky number. Otherwise, print "NO" (without the quotes). | [
"40047\n",
"7747774\n",
"1000000000000000000\n"
] | [
"NO\n",
"YES\n",
"NO\n"
] | In the first sample there are 3 lucky digits (first one and last two), so the answer is "NO".
In the second sample there are 7 lucky digits, 7 is lucky number, so the answer is "YES".
In the third sample there are no lucky digits, so the answer is "NO". | 500 | [
{
"input": "40047",
"output": "NO"
},
{
"input": "7747774",
"output": "YES"
},
{
"input": "1000000000000000000",
"output": "NO"
},
{
"input": "7",
"output": "NO"
},
{
"input": "4",
"output": "NO"
},
{
"input": "474404774",
"output": "NO"
},
{
... | 1,694,231,159 | 2,147,483,647 | Python 3 | OK | TESTS | 34 | 92 | 0 | n=int(input())
c=0
while n>0:
if n%10==4 or n%10==7:
c+=1
n//=10
if c==4 or c==7:
print("YES")
else:
print("NO")
| Title: Nearly Lucky Number
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Petya loves lucky numbers. We all know that lucky numbers are the positive integers whose decimal representations contain only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.
... | ```python
n=int(input())
c=0
while n>0:
if n%10==4 or n%10==7:
c+=1
n//=10
if c==4 or c==7:
print("YES")
else:
print("NO")
``` | 3.977 |
825 | C | Multi-judge Solving | PROGRAMMING | 1,600 | [
"greedy",
"implementation"
] | null | null | Makes solves problems on Decoforces and lots of other different online judges. Each problem is denoted by its difficulty — a positive integer number. Difficulties are measured the same across all the judges (the problem with difficulty *d* on Decoforces is as hard as the problem with difficulty *d* on any other judge).... | The first line contains two integer numbers *n*, *k* (1<=≤<=*n*<=≤<=103, 1<=≤<=*k*<=≤<=109).
The second line contains *n* space-separated integer numbers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=109). | Print minimum number of problems Makes should solve on other judges in order to solve all chosen problems on Decoforces. | [
"3 3\n2 1 9\n",
"4 20\n10 3 6 3\n"
] | [
"1\n",
"0\n"
] | In the first example Makes at first solves problems 1 and 2. Then in order to solve the problem with difficulty 9, he should solve problem with difficulty no less than 5. The only available are difficulties 5 and 6 on some other judge. Solving any of these will give Makes opportunity to solve problem 3.
In the second ... | 0 | [
{
"input": "3 3\n2 1 9",
"output": "1"
},
{
"input": "4 20\n10 3 6 3",
"output": "0"
},
{
"input": "1 1000000000\n1",
"output": "0"
},
{
"input": "1 1\n3",
"output": "1"
},
{
"input": "50 100\n74 55 33 5 83 24 75 59 30 36 13 4 62 28 96 17 6 35 45 53 33 11 37 93 34... | 1,639,544,194 | 2,147,483,647 | PyPy 3 | OK | TESTS | 61 | 77 | 0 | n,k = map(int,input().split())
A = list(map(int,input().split()))
A.sort()
curr = k
ans = 0
for i in range(n):
if (2*curr>A[i]):
curr = max(A[i],curr)
else:
while (2*curr < A[i]):
curr = 2*curr
ans +=1
curr = max(curr,A[i])
print(ans)
| Title: Multi-judge Solving
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Makes solves problems on Decoforces and lots of other different online judges. Each problem is denoted by its difficulty — a positive integer number. Difficulties are measured the same across all the judges (the pro... | ```python
n,k = map(int,input().split())
A = list(map(int,input().split()))
A.sort()
curr = k
ans = 0
for i in range(n):
if (2*curr>A[i]):
curr = max(A[i],curr)
else:
while (2*curr < A[i]):
curr = 2*curr
ans +=1
curr = max(curr,A[i])
print(ans)
... | 3 | |
785 | A | Anton and Polyhedrons | PROGRAMMING | 800 | [
"implementation",
"strings"
] | null | null | Anton's favourite geometric figures are regular polyhedrons. Note that there are five kinds of regular polyhedrons:
- Tetrahedron. Tetrahedron has 4 triangular faces. - Cube. Cube has 6 square faces. - Octahedron. Octahedron has 8 triangular faces. - Dodecahedron. Dodecahedron has 12 pentagonal faces. - Icosahed... | The first line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=200<=000) — the number of polyhedrons in Anton's collection.
Each of the following *n* lines of the input contains a string *s**i* — the name of the *i*-th polyhedron in Anton's collection. The string can look like this:
- "Tetrahedron" (withou... | Output one number — the total number of faces in all the polyhedrons in Anton's collection. | [
"4\nIcosahedron\nCube\nTetrahedron\nDodecahedron\n",
"3\nDodecahedron\nOctahedron\nOctahedron\n"
] | [
"42\n",
"28\n"
] | In the first sample Anton has one icosahedron, one cube, one tetrahedron and one dodecahedron. Icosahedron has 20 faces, cube has 6 faces, tetrahedron has 4 faces and dodecahedron has 12 faces. In total, they have 20 + 6 + 4 + 12 = 42 faces. | 500 | [
{
"input": "4\nIcosahedron\nCube\nTetrahedron\nDodecahedron",
"output": "42"
},
{
"input": "3\nDodecahedron\nOctahedron\nOctahedron",
"output": "28"
},
{
"input": "25\nIcosahedron\nOctahedron\nTetrahedron\nDodecahedron\nCube\nIcosahedron\nOctahedron\nCube\nTetrahedron\nIcosahedron\nIcosa... | 1,686,113,617 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 1 | 46 | 0 | x=int(input())
c=0
L=[]
d={"Tetrahedron":4,"Cube":6,"Octahedron":8,"Dodecahedron":12,"Icosahedron":20}
for i in range(x):
a=input()
L.append(a)
for i in d:
if i in L:
c+=d[i]
print(c) | Title: Anton and Polyhedrons
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Anton's favourite geometric figures are regular polyhedrons. Note that there are five kinds of regular polyhedrons:
- Tetrahedron. Tetrahedron has 4 triangular faces. - Cube. Cube has 6 square faces. - Octahe... | ```python
x=int(input())
c=0
L=[]
d={"Tetrahedron":4,"Cube":6,"Octahedron":8,"Dodecahedron":12,"Icosahedron":20}
for i in range(x):
a=input()
L.append(a)
for i in d:
if i in L:
c+=d[i]
print(c)
``` | 0 | |
907 | B | Tic-Tac-Toe | PROGRAMMING | 1,400 | [
"implementation"
] | null | null | Two bears are playing tic-tac-toe via mail. It's boring for them to play usual tic-tac-toe game, so they are a playing modified version of this game. Here are its rules.
The game is played on the following field.
Players are making moves by turns. At first move a player can put his chip in any cell of any small field... | First 11 lines contains descriptions of table with 9 rows and 9 columns which are divided into 9 small fields by spaces and empty lines. Each small field is described by 9 characters without spaces and empty lines. character "x" (ASCII-code 120) means that the cell is occupied with chip of the first player, character "... | Output the field in same format with characters "!" (ASCII-code 33) on positions where the current player can put his chip. All other cells should not be modified. | [
"... ... ...\n... ... ...\n... ... ...\n\n... ... ...\n... ... ...\n... x.. ...\n\n... ... ...\n... ... ...\n... ... ...\n6 4\n",
"xoo x.. x..\nooo ... ...\nooo ... ...\n\nx.. x.. x..\n... ... ...\n... ... ...\n\nx.. x.. x..\n... ... ...\n... ... ...\n7 4\n",
"o.. ... ...\n... ... ...\n... ... ...\n\n... xxx ..... | [
"... ... ... \n... ... ... \n... ... ... \n\n... ... ... \n... ... ... \n... x.. ... \n\n!!! ... ... \n!!! ... ... \n!!! ... ... \n\n",
"xoo x!! x!! \nooo !!! !!! \nooo !!! !!! \n\nx!! x!! x!! \n!!! !!! !!! \n!!! !!! !!! \n\nx!! x!! x!! \n!!! !!! !!! \n!!! !!! !!! \n\n",
"o!! !!! !!! \n!!! !!! !!! \n!!! !!! !!!... | In the first test case the first player made a move to lower left cell of central field, so the second player can put a chip only to cells of lower left field.
In the second test case the last move was done to upper left cell of lower central field, however all cells in upper left field are occupied, so the second pla... | 1,000 | [
{
"input": "... ... ...\n... ... ...\n... ... ...\n\n... ... ...\n... ... ...\n... x.. ...\n\n... ... ...\n... ... ...\n... ... ...\n6 4",
"output": "... ... ... \n... ... ... \n... ... ... \n\n... ... ... \n... ... ... \n... x.. ... \n\n!!! ... ... \n!!! ... ... \n!!! ... ... "
},
{
"input": "xoo x... | 1,514,040,166 | 2,266 | Python 3 | OK | TESTS | 20 | 62 | 5,529,600 | # x is the first player
# even number of chips means it is the first player turn
# odd number of chips means it is the second player turn
from sys import stdin, stdout
b = stdin.readlines()
x, y = [int(z) for z in b[-1].strip().split()]
m = [list(l) for l in b[:-1]]
# get in which smaller board we have to play
pos_x... | Title: Tic-Tac-Toe
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Two bears are playing tic-tac-toe via mail. It's boring for them to play usual tic-tac-toe game, so they are a playing modified version of this game. Here are its rules.
The game is played on the following field.
Players ... | ```python
# x is the first player
# even number of chips means it is the first player turn
# odd number of chips means it is the second player turn
from sys import stdin, stdout
b = stdin.readlines()
x, y = [int(z) for z in b[-1].strip().split()]
m = [list(l) for l in b[:-1]]
# get in which smaller board we have to ... | 3 | |
758 | A | Holiday Of Equality | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | In Berland it is the holiday of equality. In honor of the holiday the king decided to equalize the welfare of all citizens in Berland by the expense of the state treasury.
Totally in Berland there are *n* citizens, the welfare of each of them is estimated as the integer in *a**i* burles (burle is the currency in Berl... | The first line contains the integer *n* (1<=≤<=*n*<=≤<=100) — the number of citizens in the kingdom.
The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n*, where *a**i* (0<=≤<=*a**i*<=≤<=106) — the welfare of the *i*-th citizen. | In the only line print the integer *S* — the minimum number of burles which are had to spend. | [
"5\n0 1 2 3 4\n",
"5\n1 1 0 1 1\n",
"3\n1 3 1\n",
"1\n12\n"
] | [
"10",
"1",
"4",
"0"
] | In the first example if we add to the first citizen 4 burles, to the second 3, to the third 2 and to the fourth 1, then the welfare of all citizens will equal 4.
In the second example it is enough to give one burle to the third citizen.
In the third example it is necessary to give two burles to the first and the thi... | 500 | [
{
"input": "5\n0 1 2 3 4",
"output": "10"
},
{
"input": "5\n1 1 0 1 1",
"output": "1"
},
{
"input": "3\n1 3 1",
"output": "4"
},
{
"input": "1\n12",
"output": "0"
},
{
"input": "3\n1 2 3",
"output": "3"
},
{
"input": "14\n52518 718438 358883 462189 853... | 1,668,255,023 | 2,147,483,647 | Python 3 | OK | TESTS | 41 | 46 | 0 | n=int(input())
a = map(int, input().split())
a=list(a)
s=[]
b=0
for i in range (n):
if a[i]<max(a):
b=max(a)-a[i]
s.append(b)
print(sum(s)) | Title: Holiday Of Equality
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
In Berland it is the holiday of equality. In honor of the holiday the king decided to equalize the welfare of all citizens in Berland by the expense of the state treasury.
Totally in Berland there are *n* citizens... | ```python
n=int(input())
a = map(int, input().split())
a=list(a)
s=[]
b=0
for i in range (n):
if a[i]<max(a):
b=max(a)-a[i]
s.append(b)
print(sum(s))
``` | 3 | |
69 | A | Young Physicist | PROGRAMMING | 1,000 | [
"implementation",
"math"
] | A. Young Physicist | 2 | 256 | A guy named Vasya attends the final grade of a high school. One day Vasya decided to watch a match of his favorite hockey team. And, as the boy loves hockey very much, even more than physics, he forgot to do the homework. Specifically, he forgot to complete his physics tasks. Next day the teacher got very angry at Vasy... | The first line contains a positive integer *n* (1<=≤<=*n*<=≤<=100), then follow *n* lines containing three integers each: the *x**i* coordinate, the *y**i* coordinate and the *z**i* coordinate of the force vector, applied to the body (<=-<=100<=≤<=*x**i*,<=*y**i*,<=*z**i*<=≤<=100). | Print the word "YES" if the body is in equilibrium, or the word "NO" if it is not. | [
"3\n4 1 7\n-2 4 -1\n1 -5 -3\n",
"3\n3 -1 7\n-5 2 -4\n2 -1 -3\n"
] | [
"NO",
"YES"
] | none | 500 | [
{
"input": "3\n4 1 7\n-2 4 -1\n1 -5 -3",
"output": "NO"
},
{
"input": "3\n3 -1 7\n-5 2 -4\n2 -1 -3",
"output": "YES"
},
{
"input": "10\n21 32 -46\n43 -35 21\n42 2 -50\n22 40 20\n-27 -9 38\n-4 1 1\n-40 6 -31\n-13 -2 34\n-21 34 -12\n-32 -29 41",
"output": "NO"
},
{
"input": "10... | 1,615,658,416 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 92 | 0 |
n = input()
a = int(input().split())
b = int(input().split())
c= int(input().split())
if (a[0]+b[0]+c[0]==0 and a[1] +b[1] +c[1]==0 and a[2] +b[2] +c[2]==0):
print ("YES")
else:
print ("NO") | Title: Young Physicist
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
A guy named Vasya attends the final grade of a high school. One day Vasya decided to watch a match of his favorite hockey team. And, as the boy loves hockey very much, even more than physics, he forgot to do the homework. S... | ```python
n = input()
a = int(input().split())
b = int(input().split())
c= int(input().split())
if (a[0]+b[0]+c[0]==0 and a[1] +b[1] +c[1]==0 and a[2] +b[2] +c[2]==0):
print ("YES")
else:
print ("NO")
``` | -1 |
1,006 | A | Adjacent Replacements | PROGRAMMING | 800 | [
"implementation"
] | null | null | Mishka got an integer array $a$ of length $n$ as a birthday present (what a surprise!).
Mishka doesn't like this present and wants to change it somehow. He has invented an algorithm and called it "Mishka's Adjacent Replacements Algorithm". This algorithm can be represented as a sequence of steps:
- Replace each occu... | The first line of the input contains one integer number $n$ ($1 \le n \le 1000$) — the number of elements in Mishka's birthday present (surprisingly, an array).
The second line of the input contains $n$ integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 10^9$) — the elements of the array. | Print $n$ integers — $b_1, b_2, \dots, b_n$, where $b_i$ is the final value of the $i$-th element of the array after applying "Mishka's Adjacent Replacements Algorithm" to the array $a$. Note that you cannot change the order of elements in the array. | [
"5\n1 2 4 5 10\n",
"10\n10000 10 50605065 1 5 89 5 999999999 60506056 1000000000\n"
] | [
"1 1 3 5 9\n",
"9999 9 50605065 1 5 89 5 999999999 60506055 999999999\n"
] | The first example is described in the problem statement. | 0 | [
{
"input": "5\n1 2 4 5 10",
"output": "1 1 3 5 9"
},
{
"input": "10\n10000 10 50605065 1 5 89 5 999999999 60506056 1000000000",
"output": "9999 9 50605065 1 5 89 5 999999999 60506055 999999999"
},
{
"input": "1\n999999999",
"output": "999999999"
},
{
"input": "1\n1000000000",... | 1,632,743,401 | 2,147,483,647 | Python 3 | OK | TESTS | 18 | 62 | 6,963,200 | # Hydro submission #6151afe7e1e9420537150298@1632743400038
n = int(input())
a = list(map(int,input().split()))
# print(a)
b = []
# a = [1,2 ,4 ,5 ,10]
for i in a:
# print(i)
if i%2==0:
i = i-1
# print(i)
else:
i=i
b.append(i)
# print(str(b))
# b = str(b)
fo... | Title: Adjacent Replacements
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Mishka got an integer array $a$ of length $n$ as a birthday present (what a surprise!).
Mishka doesn't like this present and wants to change it somehow. He has invented an algorithm and called it "Mishka's Adjace... | ```python
# Hydro submission #6151afe7e1e9420537150298@1632743400038
n = int(input())
a = list(map(int,input().split()))
# print(a)
b = []
# a = [1,2 ,4 ,5 ,10]
for i in a:
# print(i)
if i%2==0:
i = i-1
# print(i)
else:
i=i
b.append(i)
# print(str(b))
# b = ... | 3 | |
59 | A | Word | PROGRAMMING | 800 | [
"implementation",
"strings"
] | A. Word | 2 | 256 | Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it either only consisted of lowercase letters or, vice versa, only of uppercase ones. At th... | The first line contains a word *s* — it consists of uppercase and lowercase Latin letters and possesses the length from 1 to 100. | Print the corrected word *s*. If the given word *s* has strictly more uppercase letters, make the word written in the uppercase register, otherwise - in the lowercase one. | [
"HoUse\n",
"ViP\n",
"maTRIx\n"
] | [
"house\n",
"VIP\n",
"matrix\n"
] | none | 500 | [
{
"input": "HoUse",
"output": "house"
},
{
"input": "ViP",
"output": "VIP"
},
{
"input": "maTRIx",
"output": "matrix"
},
{
"input": "BNHWpnpawg",
"output": "bnhwpnpawg"
},
{
"input": "VTYGP",
"output": "VTYGP"
},
{
"input": "CHNenu",
"output": "chn... | 1,571,929,361 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 248 | 0 | lcount=0
ucount=0
S=input()
for i in S:
if i.islower()==True:
lcount+=1
else:
ucount+=1
if lcount>=ucount:
print(S.lower())
else:
print(S.upper())
| Title: Word
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it ei... | ```python
lcount=0
ucount=0
S=input()
for i in S:
if i.islower()==True:
lcount+=1
else:
ucount+=1
if lcount>=ucount:
print(S.lower())
else:
print(S.upper())
``` | 3.938 |
38 | B | Chess | PROGRAMMING | 1,200 | [
"brute force",
"implementation",
"math"
] | B. Chess | 2 | 256 | Two chess pieces, a rook and a knight, stand on a standard chessboard 8<=×<=8 in size. The positions in which they are situated are known. It is guaranteed that none of them beats the other one.
Your task is to find the number of ways to place another knight on the board so that none of the three pieces on the board b... | The first input line contains the description of the rook's position on the board. This description is a line which is 2 in length. Its first symbol is a lower-case Latin letter from a to h, and its second symbol is a number from 1 to 8. The second line contains the description of the knight's position in a similar way... | Print a single number which is the required number of ways. | [
"a1\nb2\n",
"a8\nd4\n"
] | [
"44\n",
"38\n"
] | none | 0 | [
{
"input": "a1\nb2",
"output": "44"
},
{
"input": "a8\nd4",
"output": "38"
},
{
"input": "a8\nf1",
"output": "42"
},
{
"input": "f8\nh3",
"output": "42"
},
{
"input": "g8\nb7",
"output": "42"
},
{
"input": "h1\ng5",
"output": "42"
},
{
"inp... | 1,673,176,769 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 40 | 124 | 0 | def c_to_i(c,d='a'):
return ord(c)-ord(d)
r_pos = input()
k_pos = input()
cnt = 64
board = [[1 for i in range(8)]for j in range(8)]
k_dx = [0,2,-2,2,-2,1,-1,1,-1]
k_dy = [0,1,1,-1,-1,2,2,-2,-2]
row,col = c_to_i(r_pos[0]),c_to_i(r_pos[1],'1')
# for rock
## check attack from new knight
for i in r... | Title: Chess
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Two chess pieces, a rook and a knight, stand on a standard chessboard 8<=×<=8 in size. The positions in which they are situated are known. It is guaranteed that none of them beats the other one.
Your task is to find the number of wa... | ```python
def c_to_i(c,d='a'):
return ord(c)-ord(d)
r_pos = input()
k_pos = input()
cnt = 64
board = [[1 for i in range(8)]for j in range(8)]
k_dx = [0,2,-2,2,-2,1,-1,1,-1]
k_dy = [0,1,1,-1,-1,2,2,-2,-2]
row,col = c_to_i(r_pos[0]),c_to_i(r_pos[1],'1')
# for rock
## check attack from new knight
... | 3.969 |
553 | A | Kyoya and Colored Balls | PROGRAMMING | 1,500 | [
"combinatorics",
"dp",
"math"
] | null | null | Kyoya Ootori has a bag with *n* colored balls that are colored with *k* different colors. The colors are labeled from 1 to *k*. Balls of the same color are indistinguishable. He draws balls from the bag one by one until the bag is empty. He noticed that he drew the last ball of color *i* before drawing the last ball of... | The first line of input will have one integer *k* (1<=≤<=*k*<=≤<=1000) the number of colors.
Then, *k* lines will follow. The *i*-th line will contain *c**i*, the number of balls of the *i*-th color (1<=≤<=*c**i*<=≤<=1000).
The total number of balls doesn't exceed 1000. | A single integer, the number of ways that Kyoya can draw the balls from the bag as described in the statement, modulo 1<=000<=000<=007. | [
"3\n2\n2\n1\n",
"4\n1\n2\n3\n4\n"
] | [
"3\n",
"1680\n"
] | In the first sample, we have 2 balls of color 1, 2 balls of color 2, and 1 ball of color 3. The three ways for Kyoya are: | 250 | [
{
"input": "3\n2\n2\n1",
"output": "3"
},
{
"input": "4\n1\n2\n3\n4",
"output": "1680"
},
{
"input": "10\n100\n100\n100\n100\n100\n100\n100\n100\n100\n100",
"output": "12520708"
},
{
"input": "5\n10\n10\n10\n10\n10",
"output": "425711769"
},
{
"input": "11\n291\n3... | 1,577,253,032 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 2 | 109 | 307,200 | import math
k=int(input())
l=[]
for i in range(k) :
a=int(input())
l.append(a)
ln=len(l)
i=1
count=0
while i<=ln :
if(l[ln-i]!=0) :
l[ln-i]-=1
count+=1
else :
i+=1
if(count==2) :
i=ln+1
sum=sum(l)
n=math.factoria... | Title: Kyoya and Colored Balls
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Kyoya Ootori has a bag with *n* colored balls that are colored with *k* different colors. The colors are labeled from 1 to *k*. Balls of the same color are indistinguishable. He draws balls from the bag one by o... | ```python
import math
k=int(input())
l=[]
for i in range(k) :
a=int(input())
l.append(a)
ln=len(l)
i=1
count=0
while i<=ln :
if(l[ln-i]!=0) :
l[ln-i]-=1
count+=1
else :
i+=1
if(count==2) :
i=ln+1
sum=sum(l)
n=mat... | -1 | |
34 | A | Reconnaissance 2 | PROGRAMMING | 800 | [
"implementation"
] | A. Reconnaissance 2 | 2 | 256 | *n* soldiers stand in a circle. For each soldier his height *a**i* is known. A reconnaissance unit can be made of such two neighbouring soldiers, whose heights difference is minimal, i.e. |*a**i*<=-<=*a**j*| is minimal. So each of them will be less noticeable with the other. Output any pair of soldiers that can form a ... | The first line contains integer *n* (2<=≤<=*n*<=≤<=100) — amount of soldiers. Then follow the heights of the soldiers in their order in the circle — *n* space-separated integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=1000). The soldier heights are given in clockwise or counterclockwise direction. | Output two integers — indexes of neighbouring soldiers, who should form a reconnaissance unit. If there are many optimum solutions, output any of them. Remember, that the soldiers stand in a circle. | [
"5\n10 12 13 15 10\n",
"4\n10 20 30 40\n"
] | [
"5 1\n",
"1 2\n"
] | none | 500 | [
{
"input": "5\n10 12 13 15 10",
"output": "5 1"
},
{
"input": "4\n10 20 30 40",
"output": "1 2"
},
{
"input": "6\n744 359 230 586 944 442",
"output": "2 3"
},
{
"input": "5\n826 747 849 687 437",
"output": "1 2"
},
{
"input": "5\n999 999 993 969 999",
"output"... | 1,591,976,880 | 2,147,483,647 | PyPy 3 | OK | TESTS | 20 | 280 | 0 | n=int(input())
lst=list(map(int,input().split(' ')))
min_ind=(len(lst),1)
min_val=abs(lst[0]-lst[-1])
for i in range(len(lst)-1):
if abs(lst[i]-lst[i+1])<min_val:
min_val=abs(lst[i]-lst[i+1])
min_ind=(i+1,i+2)
print(min_ind[0],min_ind[1]) | Title: Reconnaissance 2
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
*n* soldiers stand in a circle. For each soldier his height *a**i* is known. A reconnaissance unit can be made of such two neighbouring soldiers, whose heights difference is minimal, i.e. |*a**i*<=-<=*a**j*| is minimal. So... | ```python
n=int(input())
lst=list(map(int,input().split(' ')))
min_ind=(len(lst),1)
min_val=abs(lst[0]-lst[-1])
for i in range(len(lst)-1):
if abs(lst[i]-lst[i+1])<min_val:
min_val=abs(lst[i]-lst[i+1])
min_ind=(i+1,i+2)
print(min_ind[0],min_ind[1])
``` | 3.93 |
776 | A | A Serial Killer | PROGRAMMING | 900 | [
"brute force",
"implementation",
"strings"
] | null | null | Our beloved detective, Sherlock is currently trying to catch a serial killer who kills a person each day. Using his powers of deduction, he came to know that the killer has a strategy for selecting his next victim.
The killer starts with two potential victims on his first day, selects one of these two, kills selected ... | First line of input contains two names (length of each of them doesn't exceed 10), the two initials potential victims. Next line contains integer *n* (1<=≤<=*n*<=≤<=1000), the number of days.
Next *n* lines contains two names (length of each of them doesn't exceed 10), first being the person murdered on this day and t... | Output *n*<=+<=1 lines, the *i*-th line should contain the two persons from which the killer selects for the *i*-th murder. The (*n*<=+<=1)-th line should contain the two persons from which the next victim is selected. In each line, the two names can be printed in any order. | [
"ross rachel\n4\nross joey\nrachel phoebe\nphoebe monica\nmonica chandler\n",
"icm codeforces\n1\ncodeforces technex\n"
] | [
"ross rachel\njoey rachel\njoey phoebe\njoey monica\njoey chandler\n",
"icm codeforces\nicm technex\n"
] | In first example, the killer starts with ross and rachel.
- After day 1, ross is killed and joey appears. - After day 2, rachel is killed and phoebe appears. - After day 3, phoebe is killed and monica appears. - After day 4, monica is killed and chandler appears. | 500 | [
{
"input": "ross rachel\n4\nross joey\nrachel phoebe\nphoebe monica\nmonica chandler",
"output": "ross rachel\njoey rachel\njoey phoebe\njoey monica\njoey chandler"
},
{
"input": "icm codeforces\n1\ncodeforces technex",
"output": "icm codeforces\nicm technex"
},
{
"input": "a b\n3\na c\n... | 1,579,865,120 | 2,147,483,647 | Python 3 | OK | TESTS | 57 | 124 | 0 | def solve(names, new_names):
solution = (names | new_names) - (new_names & names)
return solution
def read_names():
while True: yield set(input().split())
def print_names(names):
print(' '.join(names))
def main():
namesg = read_names()
names = next(namesg)
print_names(names)
n = ... | Title: A Serial Killer
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Our beloved detective, Sherlock is currently trying to catch a serial killer who kills a person each day. Using his powers of deduction, he came to know that the killer has a strategy for selecting his next victim.
The... | ```python
def solve(names, new_names):
solution = (names | new_names) - (new_names & names)
return solution
def read_names():
while True: yield set(input().split())
def print_names(names):
print(' '.join(names))
def main():
namesg = read_names()
names = next(namesg)
print_names(names)... | 3 | |
938 | A | Word Correction | PROGRAMMING | 800 | [
"implementation"
] | null | null | Victor tries to write his own text editor, with word correction included. However, the rules of word correction are really strange.
Victor thinks that if a word contains two consecutive vowels, then it's kinda weird and it needs to be replaced. So the word corrector works in such a way: as long as there are two consec... | The first line contains one integer *n* (1<=≤<=*n*<=≤<=100) — the number of letters in word *s* before the correction.
The second line contains a string *s* consisting of exactly *n* lowercase Latin letters — the word before the correction. | Output the word *s* after the correction. | [
"5\nweird\n",
"4\nword\n",
"5\naaeaa\n"
] | [
"werd\n",
"word\n",
"a\n"
] | Explanations of the examples:
1. There is only one replace: weird <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/70a0795f45d32287dba0eb83fc4a3f470c6e5537.png" style="max-width: 100.0%;max-height: 100.0%;"/> werd;1. No replace needed since there are no two consecutive vowels;1. aaeaa <i... | 0 | [
{
"input": "5\nweird",
"output": "werd"
},
{
"input": "4\nword",
"output": "word"
},
{
"input": "5\naaeaa",
"output": "a"
},
{
"input": "100\naaaaabbbbboyoyoyoyoyacadabbbbbiuiufgiuiuaahjabbbklboyoyoyoyoyaaaaabbbbbiuiuiuiuiuaaaaabbbbbeyiyuyzyw",
"output": "abbbbbocadabbbbb... | 1,645,640,509 | 2,147,483,647 | Python 3 | OK | TESTS | 49 | 46 | 0 | n = int(input())
s = input()
ans = s[0]
for i in range(1, len(s)):
if not (ans[-1] in ['a', 'i', 'e', 'u', 'y', 'o'] and s[i] in ['a', 'i', 'e', 'u', 'y', 'o']):
ans += s[i]
print(ans) | Title: Word Correction
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Victor tries to write his own text editor, with word correction included. However, the rules of word correction are really strange.
Victor thinks that if a word contains two consecutive vowels, then it's kinda weird an... | ```python
n = int(input())
s = input()
ans = s[0]
for i in range(1, len(s)):
if not (ans[-1] in ['a', 'i', 'e', 'u', 'y', 'o'] and s[i] in ['a', 'i', 'e', 'u', 'y', 'o']):
ans += s[i]
print(ans)
``` | 3 | |
787 | A | The Monster | PROGRAMMING | 1,200 | [
"brute force",
"math",
"number theory"
] | null | null | A monster is chasing after Rick and Morty on another planet. They're so frightened that sometimes they scream. More accurately, Rick screams at times *b*,<=*b*<=+<=*a*,<=*b*<=+<=2*a*,<=*b*<=+<=3*a*,<=... and Morty screams at times *d*,<=*d*<=+<=*c*,<=*d*<=+<=2*c*,<=*d*<=+<=3*c*,<=....
The Monster will catch them if a... | The first line of input contains two integers *a* and *b* (1<=≤<=*a*,<=*b*<=≤<=100).
The second line contains two integers *c* and *d* (1<=≤<=*c*,<=*d*<=≤<=100). | Print the first time Rick and Morty will scream at the same time, or <=-<=1 if they will never scream at the same time. | [
"20 2\n9 19\n",
"2 1\n16 12\n"
] | [
"82\n",
"-1\n"
] | In the first sample testcase, Rick's 5th scream and Morty's 8th time are at time 82.
In the second sample testcase, all Rick's screams will be at odd times and Morty's will be at even times, so they will never scream at the same time. | 500 | [
{
"input": "20 2\n9 19",
"output": "82"
},
{
"input": "2 1\n16 12",
"output": "-1"
},
{
"input": "39 52\n88 78",
"output": "1222"
},
{
"input": "59 96\n34 48",
"output": "1748"
},
{
"input": "87 37\n91 29",
"output": "211"
},
{
"input": "11 81\n49 7",
... | 1,490,283,065 | 1,565 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 9 | 1,000 | 4,608,000 | def buscarCoincidencia(a, b, c, d):
mult1 = b
mult2 = d
while mult1 != mult2:
if mult1 < mult2:
mult1 = mult1 + a
else:
mult2 = mult2 + c
print(mult1)
a, b = [int(i) for i in input().split(" ")]
c, d = [int(i) for i in input().split(" ")]
if a % c =... | Title: The Monster
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A monster is chasing after Rick and Morty on another planet. They're so frightened that sometimes they scream. More accurately, Rick screams at times *b*,<=*b*<=+<=*a*,<=*b*<=+<=2*a*,<=*b*<=+<=3*a*,<=... and Morty screams a... | ```python
def buscarCoincidencia(a, b, c, d):
mult1 = b
mult2 = d
while mult1 != mult2:
if mult1 < mult2:
mult1 = mult1 + a
else:
mult2 = mult2 + c
print(mult1)
a, b = [int(i) for i in input().split(" ")]
c, d = [int(i) for i in input().split(" ")]
... | 0 | |
233 | A | Perfect Permutation | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | A permutation is a sequence of integers *p*1,<=*p*2,<=...,<=*p**n*, consisting of *n* distinct positive integers, each of them doesn't exceed *n*. Let's denote the *i*-th element of permutation *p* as *p**i*. We'll call number *n* the size of permutation *p*1,<=*p*2,<=...,<=*p**n*.
Nickolas adores permutations. He lik... | A single line contains a single integer *n* (1<=≤<=*n*<=≤<=100) — the permutation size. | If a perfect permutation of size *n* doesn't exist, print a single integer -1. Otherwise print *n* distinct integers from 1 to *n*, *p*1,<=*p*2,<=...,<=*p**n* — permutation *p*, that is perfect. Separate printed numbers by whitespaces. | [
"1\n",
"2\n",
"4\n"
] | [
"-1\n",
"2 1 \n",
"2 1 4 3 \n"
] | none | 500 | [
{
"input": "1",
"output": "-1"
},
{
"input": "2",
"output": "2 1 "
},
{
"input": "4",
"output": "2 1 4 3 "
},
{
"input": "3",
"output": "-1"
},
{
"input": "5",
"output": "-1"
},
{
"input": "6",
"output": "2 1 4 3 6 5 "
},
{
"input": "7",
... | 1,680,745,884 | 2,147,483,647 | PyPy 3 | OK | TESTS | 30 | 186 | 0 | n = int(input())
if n%2==0:
x = 2
for i in range(n//2):
for j in range(2):
print(f"{x-j}",end =' ')
x +=2
else:
print("-1")
| Title: Perfect Permutation
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A permutation is a sequence of integers *p*1,<=*p*2,<=...,<=*p**n*, consisting of *n* distinct positive integers, each of them doesn't exceed *n*. Let's denote the *i*-th element of permutation *p* as *p**i*. We'll ... | ```python
n = int(input())
if n%2==0:
x = 2
for i in range(n//2):
for j in range(2):
print(f"{x-j}",end =' ')
x +=2
else:
print("-1")
``` | 3 | |
716 | B | Complete the Word | PROGRAMMING | 1,300 | [
"greedy",
"two pointers"
] | null | null | ZS the Coder loves to read the dictionary. He thinks that a word is nice if there exists a substring (contiguous segment of letters) of it of length 26 where each letter of English alphabet appears exactly once. In particular, if the string has length strictly less than 26, no such substring exists and thus it is not n... | The first and only line of the input contains a single string *s* (1<=≤<=|*s*|<=≤<=50<=000), the word that ZS the Coder remembers. Each character of the string is the uppercase letter of English alphabet ('A'-'Z') or is a question mark ('?'), where the question marks denotes the letters that ZS the Coder can't remember... | If there is no way to replace all the question marks with uppercase letters such that the resulting word is nice, then print <=-<=1 in the only line.
Otherwise, print a string which denotes a possible nice word that ZS the Coder learned. This string should match the string from the input, except for the question marks... | [
"ABC??FGHIJK???OPQR?TUVWXY?\n",
"WELCOMETOCODEFORCESROUNDTHREEHUNDREDANDSEVENTYTWO\n",
"??????????????????????????\n",
"AABCDEFGHIJKLMNOPQRSTUVW??M\n"
] | [
"ABCDEFGHIJKLMNOPQRZTUVWXYS",
"-1",
"MNBVCXZLKJHGFDSAQPWOEIRUYT",
"-1"
] | In the first sample case, ABCDEFGHIJKLMNOPQRZTUVWXYS is a valid answer beacuse it contains a substring of length 26 (the whole string in this case) which contains all the letters of the English alphabet exactly once. Note that there are many possible solutions, such as ABCDEFGHIJKLMNOPQRSTUVWXYZ or ABCEDFGHIJKLMNOPQRZT... | 1,000 | [
{
"input": "ABC??FGHIJK???OPQR?TUVWXY?",
"output": "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
},
{
"input": "WELCOMETOCODEFORCESROUNDTHREEHUNDREDANDSEVENTYTWO",
"output": "-1"
},
{
"input": "??????????????????????????",
"output": "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
},
{
"input": "AABCDEFGHIJKLMNO... | 1,663,787,549 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 43 | 78 | 512,000 | s=list(input()); n=len(s)
chk = [chr(i+65) for i in range(26)]; chk.sort()
alph = [chr(i+65) for i in range(26)]; s = list(s); j= 0
for x in s :
if x in alph: alph.remove(x)
a = len(alph)
for x in range(n) :
if s[x] == '?' : s[x] = alph[j%a]; j+=1
if set(s) == set(chk) : print(''.join(s))
else ... | Title: Complete the Word
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
ZS the Coder loves to read the dictionary. He thinks that a word is nice if there exists a substring (contiguous segment of letters) of it of length 26 where each letter of English alphabet appears exactly once. In pa... | ```python
s=list(input()); n=len(s)
chk = [chr(i+65) for i in range(26)]; chk.sort()
alph = [chr(i+65) for i in range(26)]; s = list(s); j= 0
for x in s :
if x in alph: alph.remove(x)
a = len(alph)
for x in range(n) :
if s[x] == '?' : s[x] = alph[j%a]; j+=1
if set(s) == set(chk) : print(''.join(s)) ... | 0 | |
749 | A | Bachgold Problem | PROGRAMMING | 800 | [
"greedy",
"implementation",
"math",
"number theory"
] | null | null | Bachgold problem is very easy to formulate. Given a positive integer *n* represent it as a sum of maximum possible number of prime numbers. One can prove that such representation exists for any integer greater than 1.
Recall that integer *k* is called prime if it is greater than 1 and has exactly two positive integer ... | The only line of the input contains a single integer *n* (2<=≤<=*n*<=≤<=100<=000). | The first line of the output contains a single integer *k* — maximum possible number of primes in representation.
The second line should contain *k* primes with their sum equal to *n*. You can print them in any order. If there are several optimal solution, print any of them. | [
"5\n",
"6\n"
] | [
"2\n2 3\n",
"3\n2 2 2\n"
] | none | 500 | [
{
"input": "5",
"output": "2\n2 3"
},
{
"input": "6",
"output": "3\n2 2 2"
},
{
"input": "2",
"output": "1\n2"
},
{
"input": "3",
"output": "1\n3"
},
{
"input": "99999",
"output": "49999\n2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ... | 1,664,748,578 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 41 | 108 | 6,553,600 | n = int(input())
print(n//2)
for i in range(n//2): print('3' if i==n//2-1 and n%2!=0 else '2', end=' ') | Title: Bachgold Problem
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Bachgold problem is very easy to formulate. Given a positive integer *n* represent it as a sum of maximum possible number of prime numbers. One can prove that such representation exists for any integer greater than 1.
... | ```python
n = int(input())
print(n//2)
for i in range(n//2): print('3' if i==n//2-1 and n%2!=0 else '2', end=' ')
``` | 3 | |
6 | D | Lizards and Basements 2 | PROGRAMMING | 2,600 | [
"brute force",
"dp"
] | D. Lizards and Basements 2 | 2 | 64 | This is simplified version of the problem used on the original contest. The original problem seems to have too difiicult solution. The constraints for input data have been reduced.
Polycarp likes to play computer role-playing game «Lizards and Basements». At the moment he is playing it as a magician. At one of the las... | The first line of the input contains three integers *n*,<=*a*,<=*b* (3<=≤<=*n*<=≤<=10; 1<=≤<=*b*<=<<=*a*<=≤<=10). The second line contains a sequence of *n* integers — *h*1,<=*h*2,<=...,<=*h**n* (1<=≤<=*h**i*<=≤<=15), where *h**i* is the amount of health points the *i*-th archer has. | In the first line print *t* — the required minimum amount of fire balls.
In the second line print *t* numbers — indexes of the archers that Polycarp should hit to kill all the archers in *t* shots. All these numbers should be between 2 and *n*<=-<=1. Separate numbers with spaces. If there are several solutions, output... | [
"3 2 1\n2 2 2\n",
"4 3 1\n1 4 1 1\n"
] | [
"3\n2 2 2 ",
"4\n2 2 3 3 "
] | none | 0 | [
{
"input": "3 2 1\n2 2 2",
"output": "3\n2 2 2 "
},
{
"input": "4 3 1\n1 4 1 1",
"output": "4\n2 2 3 3 "
},
{
"input": "3 5 3\n1 2 1",
"output": "1\n2 "
},
{
"input": "3 5 3\n3 2 2",
"output": "2\n2 2 "
},
{
"input": "3 5 3\n3 2 2",
"output": "2\n2 2 "
},
... | 1,556,720,326 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 22 | 2,000 | 307,200 | n, a, b = map(int, input().split())
f = list(map(int, input().split()))
f.insert(0,0)
mn = 1<<64
hit = None
def dfs(p, ans, hit2):
global mn
if ans >= mn:
return
if p == n:
if f[p] < 0:
global hit
mn = ans
hit = hit2.copy()
return
... | Title: Lizards and Basements 2
Time Limit: 2 seconds
Memory Limit: 64 megabytes
Problem Description:
This is simplified version of the problem used on the original contest. The original problem seems to have too difiicult solution. The constraints for input data have been reduced.
Polycarp likes to play computer ro... | ```python
n, a, b = map(int, input().split())
f = list(map(int, input().split()))
f.insert(0,0)
mn = 1<<64
hit = None
def dfs(p, ans, hit2):
global mn
if ans >= mn:
return
if p == n:
if f[p] < 0:
global hit
mn = ans
hit = hit2.copy()
... | 0 |
625 | A | Guest From the Past | PROGRAMMING | 1,700 | [
"implementation",
"math"
] | null | null | Kolya Gerasimov loves kefir very much. He lives in year 1984 and knows all the details of buying this delicious drink. One day, as you probably know, he found himself in year 2084, and buying kefir there is much more complicated.
Kolya is hungry, so he went to the nearest milk shop. In 2084 you may buy kefir in a plas... | First line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=1018) — the number of rubles Kolya has at the beginning.
Then follow three lines containing integers *a*, *b* and *c* (1<=≤<=*a*<=≤<=1018, 1<=≤<=*c*<=<<=*b*<=≤<=1018) — the cost of one plastic liter bottle, the cost of one glass liter bottle and t... | Print the only integer — maximum number of liters of kefir, that Kolya can drink. | [
"10\n11\n9\n8\n",
"10\n5\n6\n1\n"
] | [
"2\n",
"2\n"
] | In the first sample, Kolya can buy one glass bottle, then return it and buy one more glass bottle. Thus he will drink 2 liters of kefir.
In the second sample, Kolya can buy two plastic bottle and get two liters of kefir, or he can buy one liter glass bottle, then return it and buy one plastic bottle. In both cases he ... | 750 | [
{
"input": "10\n11\n9\n8",
"output": "2"
},
{
"input": "10\n5\n6\n1",
"output": "2"
},
{
"input": "2\n2\n2\n1",
"output": "1"
},
{
"input": "10\n3\n3\n1",
"output": "4"
},
{
"input": "10\n1\n2\n1",
"output": "10"
},
{
"input": "10\n2\n3\n1",
"outpu... | 1,455,218,208 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 57 | 62 | 0 | n = int(input())
a = int(input())
b = int(input())
c = int(input())
if n > b:
if b - c >= a:
print(n // a)
else:
answer = (n - b) // (b - c)
n = b + (n - b) % (b - c)
cnt = 1
cnt = max(cnt + (n - b + c) // a, n // a)
print(answer + cnt)
else:
pri... | Title: Guest From the Past
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Kolya Gerasimov loves kefir very much. He lives in year 1984 and knows all the details of buying this delicious drink. One day, as you probably know, he found himself in year 2084, and buying kefir there is much mor... | ```python
n = int(input())
a = int(input())
b = int(input())
c = int(input())
if n > b:
if b - c >= a:
print(n // a)
else:
answer = (n - b) // (b - c)
n = b + (n - b) % (b - c)
cnt = 1
cnt = max(cnt + (n - b + c) // a, n // a)
print(answer + cnt)
else... | 0 | |
501 | B | Misha and Changing Handles | PROGRAMMING | 1,100 | [
"data structures",
"dsu",
"strings"
] | null | null | Misha hacked the Codeforces site. Then he decided to let all the users change their handles. A user can now change his handle any number of times. But each new handle must not be equal to any handle that is already used or that was used at some point.
Misha has a list of handle change requests. After completing the re... | The first line contains integer *q* (1<=≤<=*q*<=≤<=1000), the number of handle change requests.
Next *q* lines contain the descriptions of the requests, one per line.
Each query consists of two non-empty strings *old* and *new*, separated by a space. The strings consist of lowercase and uppercase Latin letters and di... | In the first line output the integer *n* — the number of users that changed their handles at least once.
In the next *n* lines print the mapping between the old and the new handles of the users. Each of them must contain two strings, *old* and *new*, separated by a space, meaning that before the user had handle *old*,... | [
"5\nMisha ILoveCodeforces\nVasya Petrov\nPetrov VasyaPetrov123\nILoveCodeforces MikeMirzayanov\nPetya Ivanov\n"
] | [
"3\nPetya Ivanov\nMisha MikeMirzayanov\nVasya VasyaPetrov123\n"
] | none | 500 | [
{
"input": "5\nMisha ILoveCodeforces\nVasya Petrov\nPetrov VasyaPetrov123\nILoveCodeforces MikeMirzayanov\nPetya Ivanov",
"output": "3\nPetya Ivanov\nMisha MikeMirzayanov\nVasya VasyaPetrov123"
},
{
"input": "1\nMisha Vasya",
"output": "1\nMisha Vasya"
},
{
"input": "10\na b\nb c\nc d\nd... | 1,684,999,829 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | def solve():
d1={}
d2={}
n=int(input())
for i in range(n):
k,v=list(map(str,input().split(" ")))
if k in d2:
d1[d2[k]]=v;
else:
d1[k]=v;
d2[v]=k
for i in d1.keys():
print(i,d1[i]);
... | Title: Misha and Changing Handles
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Misha hacked the Codeforces site. Then he decided to let all the users change their handles. A user can now change his handle any number of times. But each new handle must not be equal to any handle that is a... | ```python
def solve():
d1={}
d2={}
n=int(input())
for i in range(n):
k,v=list(map(str,input().split(" ")))
if k in d2:
d1[d2[k]]=v;
else:
d1[k]=v;
d2[v]=k
for i in d1.keys():
print(i,d1[i]);
... | 0 | |
496 | A | Minimum Difficulty | PROGRAMMING | 900 | [
"brute force",
"implementation",
"math"
] | null | null | Mike is trying rock climbing but he is awful at it.
There are *n* holds on the wall, *i*-th hold is at height *a**i* off the ground. Besides, let the sequence *a**i* increase, that is, *a**i*<=<<=*a**i*<=+<=1 for all *i* from 1 to *n*<=-<=1; we will call such sequence a track. Mike thinks that the track *a*1, ...,... | The first line contains a single integer *n* (3<=≤<=*n*<=≤<=100) — the number of holds.
The next line contains *n* space-separated integers *a**i* (1<=≤<=*a**i*<=≤<=1000), where *a**i* is the height where the hold number *i* hangs. The sequence *a**i* is increasing (i.e. each element except for the first one is strict... | Print a single number — the minimum difficulty of the track after removing a single hold. | [
"3\n1 4 6\n",
"5\n1 2 3 4 5\n",
"5\n1 2 3 7 8\n"
] | [
"5\n",
"2\n",
"4\n"
] | In the first sample you can remove only the second hold, then the sequence looks like (1, 6), the maximum difference of the neighboring elements equals 5.
In the second test after removing every hold the difficulty equals 2.
In the third test you can obtain sequences (1, 3, 7, 8), (1, 2, 7, 8), (1, 2, 3, 8), for whic... | 500 | [
{
"input": "3\n1 4 6",
"output": "5"
},
{
"input": "5\n1 2 3 4 5",
"output": "2"
},
{
"input": "5\n1 2 3 7 8",
"output": "4"
},
{
"input": "3\n1 500 1000",
"output": "999"
},
{
"input": "10\n1 2 3 4 5 6 7 8 9 10",
"output": "2"
},
{
"input": "10\n1 4 9... | 1,418,836,518 | 2,718 | Python 3 | OK | TESTS | 19 | 61 | 0 | n = int(input())
seq = list(map(int, input().split()))
res = []
for i in range(1, n-1):
res.append((abs(seq[i]-seq[i-1]), abs(seq[i]-seq[i+1])))
seq.pop(res.index(min(res)) + 1)
MAX = 0
for i in range(1, n-1):
if abs(seq[i] - seq[i-1]) > MAX:
MAX = abs(seq[i] - seq[i-1])
print(MAX)
| Title: Minimum Difficulty
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Mike is trying rock climbing but he is awful at it.
There are *n* holds on the wall, *i*-th hold is at height *a**i* off the ground. Besides, let the sequence *a**i* increase, that is, *a**i*<=<<=*a**i*<=+<=1 fo... | ```python
n = int(input())
seq = list(map(int, input().split()))
res = []
for i in range(1, n-1):
res.append((abs(seq[i]-seq[i-1]), abs(seq[i]-seq[i+1])))
seq.pop(res.index(min(res)) + 1)
MAX = 0
for i in range(1, n-1):
if abs(seq[i] - seq[i-1]) > MAX:
MAX = abs(seq[i] - seq[i-1])
pr... | 3 | |
989 | A | A Blend of Springtime | PROGRAMMING | 900 | [
"implementation",
"strings"
] | null | null | "What a pity it's already late spring," sighs Mino with regret, "one more drizzling night and they'd be gone."
"But these blends are at their best, aren't they?" Absorbed in the landscape, Kanno remains optimistic.
The landscape can be expressed as a row of consecutive cells, each of which either contains a flower o... | The first and only line of input contains a non-empty string $s$ consisting of uppercase English letters 'A', 'B', 'C' and characters '.' (dots) only ($\lvert s \rvert \leq 100$) — denoting cells containing an amber flower, a buff one, a canary yellow one, and no flowers, respectively. | Output "Yes" if it's possible that all three colours appear in some cell, and "No" otherwise.
You can print each letter in any case (upper or lower). | [
".BAC.\n",
"AA..CB\n"
] | [
"Yes\n",
"No\n"
] | In the first example, the buff and canary yellow flowers can leave their petals in the central cell, blending all three colours in it.
In the second example, it's impossible to satisfy the requirement because there is no way that amber and buff meet in any cell. | 500 | [
{
"input": ".BAC.",
"output": "Yes"
},
{
"input": "AA..CB",
"output": "No"
},
{
"input": ".",
"output": "No"
},
{
"input": "ACB.AAAAAA",
"output": "Yes"
},
{
"input": "B.BC.BBBCA",
"output": "Yes"
},
{
"input": "BA..CAB..B",
"output": "Yes"
},
... | 1,528,822,240 | 2,440 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 77 | 0 | res = "No"
s = input()
for i in s[1:-1]:
ss = sorted(s[i-1:i+2])
if ss == ["A", "B", "C"]:
res = "Yes"
break
print(res) | Title: A Blend of Springtime
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
"What a pity it's already late spring," sighs Mino with regret, "one more drizzling night and they'd be gone."
"But these blends are at their best, aren't they?" Absorbed in the landscape, Kanno remains optimisti... | ```python
res = "No"
s = input()
for i in s[1:-1]:
ss = sorted(s[i-1:i+2])
if ss == ["A", "B", "C"]:
res = "Yes"
break
print(res)
``` | -1 | |
160 | A | Twins | PROGRAMMING | 900 | [
"greedy",
"sortings"
] | null | null | Imagine that you have a twin brother or sister. Having another person that looks exactly like you seems very unusual. It's hard to say if having something of an alter ego is good or bad. And if you do have a twin, then you very well know what it's like.
Now let's imagine a typical morning in your family. You haven't w... | The first line contains integer *n* (1<=≤<=*n*<=≤<=100) — the number of coins. The second line contains a sequence of *n* integers *a*1, *a*2, ..., *a**n* (1<=≤<=*a**i*<=≤<=100) — the coins' values. All numbers are separated with spaces. | In the single line print the single number — the minimum needed number of coins. | [
"2\n3 3\n",
"3\n2 1 2\n"
] | [
"2\n",
"2\n"
] | In the first sample you will have to take 2 coins (you and your twin have sums equal to 6, 0 correspondingly). If you take 1 coin, you get sums 3, 3. If you take 0 coins, you get sums 0, 6. Those variants do not satisfy you as your sum should be strictly more that your twins' sum.
In the second sample one coin isn't e... | 500 | [
{
"input": "2\n3 3",
"output": "2"
},
{
"input": "3\n2 1 2",
"output": "2"
},
{
"input": "1\n5",
"output": "1"
},
{
"input": "5\n4 2 2 2 2",
"output": "3"
},
{
"input": "7\n1 10 1 2 1 1 1",
"output": "1"
},
{
"input": "5\n3 2 3 3 1",
"output": "3"
... | 1,692,201,373 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 62 | 0 | """
@auther:Abdallah_Gaber
"""
#A.Twins(splitting money equallay)
n = int(input())
coins = [int(x) for x in input().split()]
one_boy_money = sum(coins) / 2
needed_coins = 0
needed_money = 0
sorted(coins)
for i in range(n-1,-1,-1):
if needed_money > one_boy_money:
break
else:
n... | Title: Twins
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Imagine that you have a twin brother or sister. Having another person that looks exactly like you seems very unusual. It's hard to say if having something of an alter ego is good or bad. And if you do have a twin, then you very w... | ```python
"""
@auther:Abdallah_Gaber
"""
#A.Twins(splitting money equallay)
n = int(input())
coins = [int(x) for x in input().split()]
one_boy_money = sum(coins) / 2
needed_coins = 0
needed_money = 0
sorted(coins)
for i in range(n-1,-1,-1):
if needed_money > one_boy_money:
break
else:
... | 0 | |
61 | A | Ultra-Fast Mathematician | PROGRAMMING | 800 | [
"implementation"
] | A. Ultra-Fast Mathematician | 2 | 256 | Shapur was an extremely gifted student. He was great at everything including Combinatorics, Algebra, Number Theory, Geometry, Calculus, etc. He was not only smart but extraordinarily fast! He could manage to sum 1018 numbers in a single second.
One day in 230 AD Shapur was trying to find out if any one can possibly do... | There are two lines in each input. Each of them contains a single number. It is guaranteed that the numbers are made from 0 and 1 only and that their length is same. The numbers may start with 0. The length of each number doesn't exceed 100. | Write one line — the corresponding answer. Do not omit the leading 0s. | [
"1010100\n0100101\n",
"000\n111\n",
"1110\n1010\n",
"01110\n01100\n"
] | [
"1110001\n",
"111\n",
"0100\n",
"00010\n"
] | none | 500 | [
{
"input": "1010100\n0100101",
"output": "1110001"
},
{
"input": "000\n111",
"output": "111"
},
{
"input": "1110\n1010",
"output": "0100"
},
{
"input": "01110\n01100",
"output": "00010"
},
{
"input": "011101\n000001",
"output": "011100"
},
{
"input": "... | 1,689,657,167 | 2,147,483,647 | Python 3 | OK | TESTS | 102 | 62 | 0 | x = input()
y = input()
l1 = list(int(i) for i in x)
l2 = list(int(i) for i in y)
for i in range(len(str(x))):
j=i
print(l1[i]^l2[j],end="") | Title: Ultra-Fast Mathematician
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Shapur was an extremely gifted student. He was great at everything including Combinatorics, Algebra, Number Theory, Geometry, Calculus, etc. He was not only smart but extraordinarily fast! He could manage to sum 10... | ```python
x = input()
y = input()
l1 = list(int(i) for i in x)
l2 = list(int(i) for i in y)
for i in range(len(str(x))):
j=i
print(l1[i]^l2[j],end="")
``` | 3.9845 |
3 | A | Shortest path of the king | PROGRAMMING | 1,000 | [
"greedy",
"shortest paths"
] | A. Shortest path of the king | 1 | 64 | The king is left alone on the chessboard. In spite of this loneliness, he doesn't lose heart, because he has business of national importance. For example, he has to pay an official visit to square *t*. As the king is not in habit of wasting his time, he wants to get from his current position *s* to square *t* in the le... | The first line contains the chessboard coordinates of square *s*, the second line — of square *t*.
Chessboard coordinates consist of two characters, the first one is a lowercase Latin letter (from a to h), the second one is a digit from 1 to 8. | In the first line print *n* — minimum number of the king's moves. Then in *n* lines print the moves themselves. Each move is described with one of the 8: L, R, U, D, LU, LD, RU or RD.
L, R, U, D stand respectively for moves left, right, up and down (according to the picture), and 2-letter combinations stand for diago... | [
"a8\nh1\n"
] | [
"7\nRD\nRD\nRD\nRD\nRD\nRD\nRD\n"
] | none | 0 | [
{
"input": "a8\nh1",
"output": "7\nRD\nRD\nRD\nRD\nRD\nRD\nRD"
},
{
"input": "b2\nb4",
"output": "2\nU\nU"
},
{
"input": "a5\na5",
"output": "0"
},
{
"input": "h1\nb2",
"output": "6\nLU\nL\nL\nL\nL\nL"
},
{
"input": "c5\nh2",
"output": "5\nRD\nRD\nRD\nR\nR"
... | 1,696,514,834 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 35 | 124 | 0 | arr=['a','b','c','d','e','f','g','h']
a=input()
b=input()
x=abs(arr.index(a[0])-arr.index(b[0]))
y=abs(int(a[1])-int(b[1]))
M,m=max(x,y),min(x,y)
d=M-m
print(M)
if a[0]>=b[0]:
if a[1]>b[1]:
if M==x:
for i in range(m):
print('LD')
for i in range(d):
... | Title: Shortest path of the king
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
The king is left alone on the chessboard. In spite of this loneliness, he doesn't lose heart, because he has business of national importance. For example, he has to pay an official visit to square *t*. As the king ... | ```python
arr=['a','b','c','d','e','f','g','h']
a=input()
b=input()
x=abs(arr.index(a[0])-arr.index(b[0]))
y=abs(int(a[1])-int(b[1]))
M,m=max(x,y),min(x,y)
d=M-m
print(M)
if a[0]>=b[0]:
if a[1]>b[1]:
if M==x:
for i in range(m):
print('LD')
for i in rang... | 3.938 |
0 | none | none | none | 0 | [
"none"
] | null | null | Память компьютера состоит из *n* ячеек, которые выстроены в ряд. Пронумеруем ячейки от 1 до *n* слева направо. Про каждую ячейку известно, свободна она или принадлежит какому-либо процессу (в таком случае известен процесс, которому она принадлежит).
Для каждого процесса известно, что принадлежащие ему ячейки занимают ... | В первой строке входных данных записано число *n* (1<=≤<=*n*<=≤<=200<=000) — количество ячеек в памяти компьютера.
Во второй строке входных данных следуют *n* целых чисел *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=*n*), где *a**i* равно либо 0 (это означает, что *i*-я ячейка памяти свободна), либо номеру процесса, к... | Выведите одно целое число — минимальное количество операций, которое нужно сделать для дефрагментации памяти. | [
"4\n0 2 2 1\n",
"8\n0 8 8 8 0 4 4 2\n"
] | [
"2\n",
"4\n"
] | В первом тестовом примере достаточно двух операций:
1. Переписать данные из третьей ячейки в первую. После этого память компьютера примет вид: 2 2 0 1. 1. Переписать данные из четвертой ячейки в третью. После этого память компьютера примет вид: 2 2 1 0. | 0 | [
{
"input": "4\n0 2 2 1",
"output": "2"
},
{
"input": "8\n0 8 8 8 0 4 4 2",
"output": "4"
},
{
"input": "5\n0 0 0 1 1",
"output": "2"
},
{
"input": "6\n0 0 0 3 0 0",
"output": "1"
},
{
"input": "10\n0 10 10 0 0 3 3 0 0 0",
"output": "3"
},
{
"input": "1... | 1,458,982,475 | 6,875 | Python 3 | COMPILATION_ERROR | PRETESTS | 0 | 0 | 0 | #define INF 9000000
#define INT_MAX 2000000000
#include <iostream>
#include <cstdlib>
#include <ctime>
#include <set>
#include <vector>
#include <stack>
#include <unordered_map>
#include <sstream>
#include <cstring>
#include <time.h>
#include <random>
#include <algorithm>
#include <iomanip>
#include <map>
#include <que... | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Память компьютера состоит из *n* ячеек, которые выстроены в ряд. Пронумеруем ячейки от 1 до *n* слева направо. Про каждую ячейку известно, свободна она или принадлежит какому-либо процессу (в таком случае известен процесс, котором... | ```python
#define INF 9000000
#define INT_MAX 2000000000
#include <iostream>
#include <cstdlib>
#include <ctime>
#include <set>
#include <vector>
#include <stack>
#include <unordered_map>
#include <sstream>
#include <cstring>
#include <time.h>
#include <random>
#include <algorithm>
#include <iomanip>
#include <map>
#in... | -1 | |
903 | D | Almost Difference | PROGRAMMING | 2,200 | [
"data structures",
"math"
] | null | null | Let's denote a function
You are given an array *a* consisting of *n* integers. You have to calculate the sum of *d*(*a**i*,<=*a**j*) over all pairs (*i*,<=*j*) such that 1<=≤<=*i*<=≤<=*j*<=≤<=*n*. | The first line contains one integer *n* (1<=≤<=*n*<=≤<=200000) — the number of elements in *a*.
The second line contains *n* integers *a*1, *a*2, ..., *a**n* (1<=≤<=*a**i*<=≤<=109) — elements of the array. | Print one integer — the sum of *d*(*a**i*,<=*a**j*) over all pairs (*i*,<=*j*) such that 1<=≤<=*i*<=≤<=*j*<=≤<=*n*. | [
"5\n1 2 3 1 3\n",
"4\n6 6 5 5\n",
"4\n6 6 4 4\n"
] | [
"4\n",
"0\n",
"-8\n"
] | In the first example:
1. *d*(*a*<sub class="lower-index">1</sub>, *a*<sub class="lower-index">2</sub>) = 0; 1. *d*(*a*<sub class="lower-index">1</sub>, *a*<sub class="lower-index">3</sub>) = 2; 1. *d*(*a*<sub class="lower-index">1</sub>, *a*<sub class="lower-index">4</sub>) = 0; 1. *d*(*a*<sub class="lower-index">... | 0 | [
{
"input": "5\n1 2 3 1 3",
"output": "4"
},
{
"input": "4\n6 6 5 5",
"output": "0"
},
{
"input": "4\n6 6 4 4",
"output": "-8"
},
{
"input": "1\n1",
"output": "0"
},
{
"input": "1\n1000000000",
"output": "0"
},
{
"input": "2\n1 1000000000",
"output"... | 1,699,832,876 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 307,200 | from collections import Counter
n = input()
a = map(int, raw_input().split())
s = 0
c = Counter()
for i in xrange(n):
s += c[a[i] + 1] - c[a[i] - 1] + a[i] * (2 * i + 1 - n)
c[a[i]] += 1
print(s) | Title: Almost Difference
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Let's denote a function
You are given an array *a* consisting of *n* integers. You have to calculate the sum of *d*(*a**i*,<=*a**j*) over all pairs (*i*,<=*j*) such that 1<=≤<=*i*<=≤<=*j*<=≤<=*n*.
Input Specifica... | ```python
from collections import Counter
n = input()
a = map(int, raw_input().split())
s = 0
c = Counter()
for i in xrange(n):
s += c[a[i] + 1] - c[a[i] - 1] + a[i] * (2 * i + 1 - n)
c[a[i]] += 1
print(s)
``` | -1 | |
43 | A | Football | PROGRAMMING | 1,000 | [
"strings"
] | A. Football | 2 | 256 | One day Vasya decided to have a look at the results of Berland 1910 Football Championship’s finals. Unfortunately he didn't find the overall score of the match; however, he got hold of a profound description of the match's process. On the whole there are *n* lines in that description each of which described one goal. E... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=100) — the number of lines in the description. Then follow *n* lines — for each goal the names of the teams that scored it. The names are non-empty lines consisting of uppercase Latin letters whose lengths do not exceed 10 symbols. It is guaranteed that the match di... | Print the name of the winning team. We remind you that in football the team that scores more goals is considered the winner. | [
"1\nABC\n",
"5\nA\nABA\nABA\nA\nA\n"
] | [
"ABC\n",
"A\n"
] | none | 500 | [
{
"input": "1\nABC",
"output": "ABC"
},
{
"input": "5\nA\nABA\nABA\nA\nA",
"output": "A"
},
{
"input": "2\nXTSJEP\nXTSJEP",
"output": "XTSJEP"
},
{
"input": "3\nXZYDJAEDZ\nXZYDJAEDZ\nXZYDJAEDZ",
"output": "XZYDJAEDZ"
},
{
"input": "3\nQCCYXL\nQCCYXL\nAXGLFQDD",
... | 1,571,508,439 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 5 | 218 | 0 | n=int(input())
x=[]
y=[]
ct1=0
ct2=0
if(n==1):
strn=str(input())
print(strn)
elif(n>1):
while(n>0):
strn=str(input())
x.append(strn)
n=n-1
for items in x:
if(items not in y):
y.append(items)
ct1=x.count(y[0])
ct2=n-ct1
if(ct1>ct2)... | Title: Football
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
One day Vasya decided to have a look at the results of Berland 1910 Football Championship’s finals. Unfortunately he didn't find the overall score of the match; however, he got hold of a profound description of the match's process... | ```python
n=int(input())
x=[]
y=[]
ct1=0
ct2=0
if(n==1):
strn=str(input())
print(strn)
elif(n>1):
while(n>0):
strn=str(input())
x.append(strn)
n=n-1
for items in x:
if(items not in y):
y.append(items)
ct1=x.count(y[0])
ct2=n-ct1
i... | 0 |
818 | B | Permutation Game | PROGRAMMING | 1,600 | [
"implementation"
] | null | null | *n* children are standing in a circle and playing a game. Children's numbers in clockwise order form a permutation *a*1,<=*a*2,<=...,<=*a**n* of length *n*. It is an integer sequence such that each integer from 1 to *n* appears exactly once in it.
The game consists of *m* steps. On each step the current leader with in... | The first line contains two integer numbers *n*, *m* (1<=≤<=*n*,<=*m*<=≤<=100).
The second line contains *m* integer numbers *l*1,<=*l*2,<=...,<=*l**m* (1<=≤<=*l**i*<=≤<=*n*) — indices of leaders in the beginning of each step. | Print such permutation of *n* numbers *a*1,<=*a*2,<=...,<=*a**n* that leaders in the game will be exactly *l*1,<=*l*2,<=...,<=*l**m* if all the rules are followed. If there are multiple solutions print any of them.
If there is no permutation which satisfies all described conditions print -1. | [
"4 5\n2 3 1 4 4\n",
"3 3\n3 1 2\n"
] | [
"3 1 2 4 \n",
"-1\n"
] | Let's follow leadership in the first example:
- Child 2 starts. - Leadership goes from 2 to 2 + *a*<sub class="lower-index">2</sub> = 3. - Leadership goes from 3 to 3 + *a*<sub class="lower-index">3</sub> = 5. As it's greater than 4, it's going in a circle to 1. - Leadership goes from 1 to 1 + *a*<sub class="lowe... | 0 | [
{
"input": "4 5\n2 3 1 4 4",
"output": "3 1 2 4 "
},
{
"input": "3 3\n3 1 2",
"output": "-1"
},
{
"input": "1 100\n1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1... | 1,622,674,606 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 19 | 109 | 0 | n, m = [int(number) for number in input().split()]
indices = [int(number) for number in input().split()]
res = [0] * (n+1)
kids = {i for i in range(1, n+1)}
current = indices[0]
flag = False
for i, index in enumerate(indices[1:]):
a = index - current if index > current else n - current + index
... | Title: Permutation Game
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
*n* children are standing in a circle and playing a game. Children's numbers in clockwise order form a permutation *a*1,<=*a*2,<=...,<=*a**n* of length *n*. It is an integer sequence such that each integer from 1 to *n... | ```python
n, m = [int(number) for number in input().split()]
indices = [int(number) for number in input().split()]
res = [0] * (n+1)
kids = {i for i in range(1, n+1)}
current = indices[0]
flag = False
for i, index in enumerate(indices[1:]):
a = index - current if index > current else n - current + index
... | 0 | |
47 | A | Triangular numbers | PROGRAMMING | 800 | [
"brute force",
"math"
] | A. Triangular numbers | 2 | 256 | A triangular number is the number of dots in an equilateral triangle uniformly filled with dots. For example, three dots can be arranged in a triangle; thus three is a triangular number. The *n*-th triangular number is the number of dots in a triangle with *n* dots on a side. . You can learn more about these numbers fr... | The first line contains the single number *n* (1<=≤<=*n*<=≤<=500) — the given integer. | If the given integer is a triangular number output YES, otherwise output NO. | [
"1\n",
"2\n",
"3\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | none | 500 | [
{
"input": "1",
"output": "YES"
},
{
"input": "2",
"output": "NO"
},
{
"input": "3",
"output": "YES"
},
{
"input": "4",
"output": "NO"
},
{
"input": "5",
"output": "NO"
},
{
"input": "6",
"output": "YES"
},
{
"input": "7",
"output": "NO... | 1,586,245,324 | 2,147,483,647 | Python 3 | OK | TESTS | 71 | 218 | 0 | n = int(input())
if n==1:
print("YES")
else:
flag = 0
for i in range(1,n):
if i*(i+1)//2==n:
print("YES")
flag = 1
break
if flag==0:
print("NO")
| Title: Triangular numbers
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
A triangular number is the number of dots in an equilateral triangle uniformly filled with dots. For example, three dots can be arranged in a triangle; thus three is a triangular number. The *n*-th triangular number is t... | ```python
n = int(input())
if n==1:
print("YES")
else:
flag = 0
for i in range(1,n):
if i*(i+1)//2==n:
print("YES")
flag = 1
break
if flag==0:
print("NO")
``` | 3.9455 |
276 | B | Little Girl and Game | PROGRAMMING | 1,300 | [
"games",
"greedy"
] | null | null | The Little Girl loves problems on games very much. Here's one of them.
Two players have got a string *s*, consisting of lowercase English letters. They play a game that is described by the following rules:
- The players move in turns; In one move the player can remove an arbitrary letter from string *s*. - If the p... | The input contains a single line, containing string *s* (1<=≤<=|*s*|<=<=≤<=<=103). String *s* consists of lowercase English letters. | In a single line print word "First" if the first player wins (provided that both players play optimally well). Otherwise, print word "Second". Print the words without the quotes. | [
"aba\n",
"abca\n"
] | [
"First\n",
"Second\n"
] | none | 1,000 | [
{
"input": "aba",
"output": "First"
},
{
"input": "abca",
"output": "Second"
},
{
"input": "aabb",
"output": "First"
},
{
"input": "ctjxzuimsxnarlciuynqeoqmmbqtagszuo",
"output": "Second"
},
{
"input": "gevqgtaorjixsxnbcoybr",
"output": "First"
},
{
"i... | 1,652,638,130 | 2,147,483,647 | Python 3 | OK | TESTS | 51 | 92 | 4,300,800 | word = input()
k = sum(word.count(x)%2 for x in set(word))
if k == 0 or k == 1 or k % 2 == 1:
print('First')
else:
print('Second') | Title: Little Girl and Game
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Little Girl loves problems on games very much. Here's one of them.
Two players have got a string *s*, consisting of lowercase English letters. They play a game that is described by the following rules:
- The... | ```python
word = input()
k = sum(word.count(x)%2 for x in set(word))
if k == 0 or k == 1 or k % 2 == 1:
print('First')
else:
print('Second')
``` | 3 | |
867 | A | Between the Offices | PROGRAMMING | 800 | [
"implementation"
] | null | null | As you may know, MemSQL has American offices in both San Francisco and Seattle. Being a manager in the company, you travel a lot between the two cities, always by plane.
You prefer flying from Seattle to San Francisco than in the other direction, because it's warmer in San Francisco. You are so busy that you don't rem... | The first line of input contains single integer *n* (2<=≤<=*n*<=≤<=100) — the number of days.
The second line contains a string of length *n* consisting of only capital 'S' and 'F' letters. If the *i*-th letter is 'S', then you were in Seattle office on that day. Otherwise you were in San Francisco. The days are given... | Print "YES" if you flew more times from Seattle to San Francisco, and "NO" otherwise.
You can print each letter in any case (upper or lower). | [
"4\nFSSF\n",
"2\nSF\n",
"10\nFFFFFFFFFF\n",
"10\nSSFFSFFSFF\n"
] | [
"NO\n",
"YES\n",
"NO\n",
"YES\n"
] | In the first example you were initially at San Francisco, then flew to Seattle, were there for two days and returned to San Francisco. You made one flight in each direction, so the answer is "NO".
In the second example you just flew from Seattle to San Francisco, so the answer is "YES".
In the third example you staye... | 500 | [
{
"input": "4\nFSSF",
"output": "NO"
},
{
"input": "2\nSF",
"output": "YES"
},
{
"input": "10\nFFFFFFFFFF",
"output": "NO"
},
{
"input": "10\nSSFFSFFSFF",
"output": "YES"
},
{
"input": "20\nSFSFFFFSSFFFFSSSSFSS",
"output": "NO"
},
{
"input": "20\nSSFFF... | 1,601,155,278 | 2,147,483,647 | Python 3 | OK | TESTS | 34 | 93 | 0 | n=int(input())
s=input()
A=0
B=0
for i in range(n-1):
if s[i:i+2]=="SF":
A+=1
elif s[i:i+2]=="FS":
B+=1
if A>B:
print("YES")
else:
print("NO")
| Title: Between the Offices
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
As you may know, MemSQL has American offices in both San Francisco and Seattle. Being a manager in the company, you travel a lot between the two cities, always by plane.
You prefer flying from Seattle to San Franci... | ```python
n=int(input())
s=input()
A=0
B=0
for i in range(n-1):
if s[i:i+2]=="SF":
A+=1
elif s[i:i+2]=="FS":
B+=1
if A>B:
print("YES")
else:
print("NO")
``` | 3 | |
172 | B | Pseudorandom Sequence Period | PROGRAMMING | 1,200 | [
"*special",
"implementation",
"number theory"
] | null | null | Polycarpus has recently got interested in sequences of pseudorandom numbers. He learned that many programming languages generate such sequences in a similar way: (for *i*<=≥<=1). Here *a*, *b*, *m* are constants, fixed for the given realization of the pseudorandom numbers generator, *r*0 is the so-called *randseed* (t... | The single line of the input contains four integers *a*, *b*, *m* and *r*0 (1<=≤<=*m*<=≤<=105,<=0<=≤<=*a*,<=*b*<=≤<=1000,<=0<=≤<=*r*0<=<<=*m*), separated by single spaces. | Print a single integer — the period of the sequence. | [
"2 6 12 11\n",
"2 3 5 1\n",
"3 6 81 9\n"
] | [
"2\n",
"4\n",
"1\n"
] | The first sample is described above.
In the second sample the sequence is (starting from the first element): 0, 3, 4, 1, 0, 3, 4, 1, 0, ...
In the third sample the sequence is (starting from the first element): 33, 24, 78, 78, 78, 78, ... | 1,000 | [
{
"input": "2 6 12 11",
"output": "2"
},
{
"input": "2 3 5 1",
"output": "4"
},
{
"input": "3 6 81 9",
"output": "1"
},
{
"input": "10 11 12 3",
"output": "3"
},
{
"input": "4 4 5 4",
"output": "2"
},
{
"input": "0 1 6 5",
"output": "1"
},
{
... | 1,675,463,090 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 56 | 124 | 31,027,200 | a,b,m,r = map(int,input().split())
mods = [0]*m
while mods[r]<3:
r = (a*r+b)%m
mods[r] += 1
# +1 for element == 3
print(mods.count(2) + 1)
| Title: Pseudorandom Sequence Period
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Polycarpus has recently got interested in sequences of pseudorandom numbers. He learned that many programming languages generate such sequences in a similar way: (for *i*<=≥<=1). Here *a*, *b*, *m* are con... | ```python
a,b,m,r = map(int,input().split())
mods = [0]*m
while mods[r]<3:
r = (a*r+b)%m
mods[r] += 1
# +1 for element == 3
print(mods.count(2) + 1)
``` | 3 | |
260 | E | Dividing Kingdom | PROGRAMMING | 2,500 | [
"binary search",
"brute force",
"data structures"
] | null | null | A country called Flatland is an infinite two-dimensional plane. Flatland has *n* cities, each of them is a point on the plane.
Flatland is ruled by king Circle IV. Circle IV has 9 sons. He wants to give each of his sons part of Flatland to rule. For that, he wants to draw four distinct straight lines, such that two of... | The first line contains integer *n* (9<=≤<=*n*<=≤<=105) — the number of cities in Flatland. Next *n* lines each contain two space-separated integers: *x**i*,<=*y**i* (<=-<=109<=≤<=*x**i*,<=*y**i*<=≤<=109) — the coordinates of the *i*-th city. No two cities are located at the same point. The last line contains nine spac... | If there is no solution, print a single integer -1.
Otherwise, print in the first line two distinct real space-separated numbers: *x*1,<=*x*2 — the abscissas of the straight lines that are parallel to the *Oy* axis. And in the second line print two distinct real space-separated numbers: *y*1,<=*y*2 — the ordinates of ... | [
"9\n1 1\n1 2\n1 3\n2 1\n2 2\n2 3\n3 1\n3 2\n3 3\n1 1 1 1 1 1 1 1 1\n",
"15\n4 4\n-1 -3\n1 5\n3 -4\n-4 4\n-1 1\n3 -3\n-4 -5\n-3 3\n3 2\n4 1\n-4 2\n-2 -5\n-3 4\n-1 4\n2 1 2 1 2 1 3 2 1\n",
"10\n-2 10\n6 0\n-16 -6\n-4 13\n-4 -2\n-17 -10\n9 15\n18 16\n-5 2\n10 -5\n2 1 1 1 1 1 1 1 1\n"
] | [
"1.5000000000 2.5000000000\n1.5000000000 2.5000000000\n",
"-3.5000000000 2.0000000000\n3.5000000000 -1.0000000000\n",
"-1\n"
] | The solution for the first sample test is shown below:
The solution for the second sample test is shown below:
There is no solution for the third sample test. | 2,500 | [] | 1,689,603,901 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | print("_RANDOM_GUESS_1689603901.1287932")# 1689603901.1288142 | Title: Dividing Kingdom
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A country called Flatland is an infinite two-dimensional plane. Flatland has *n* cities, each of them is a point on the plane.
Flatland is ruled by king Circle IV. Circle IV has 9 sons. He wants to give each of his so... | ```python
print("_RANDOM_GUESS_1689603901.1287932")# 1689603901.1288142
``` | 0 | |
378 | A | Playing with Dice | PROGRAMMING | 800 | [
"brute force"
] | null | null | Two players are playing a game. First each of them writes an integer from 1 to 6, and then a dice is thrown. The player whose written number got closer to the number on the dice wins. If both payers have the same difference, it's a draw.
The first player wrote number *a*, the second player wrote number *b*. How many w... | The single line contains two integers *a* and *b* (1<=≤<=*a*,<=*b*<=≤<=6) — the numbers written on the paper by the first and second player, correspondingly. | Print three integers: the number of ways to throw the dice at which the first player wins, the game ends with a draw or the second player wins, correspondingly. | [
"2 5\n",
"2 4\n"
] | [
"3 0 3\n",
"2 1 3\n"
] | The dice is a standard cube-shaped six-sided object with each side containing a number from 1 to 6, and where all numbers on all sides are distinct.
You can assume that number *a* is closer to number *x* than number *b*, if |*a* - *x*| < |*b* - *x*|. | 500 | [
{
"input": "2 5",
"output": "3 0 3"
},
{
"input": "2 4",
"output": "2 1 3"
},
{
"input": "5 3",
"output": "2 1 3"
},
{
"input": "1 6",
"output": "3 0 3"
},
{
"input": "5 1",
"output": "3 1 2"
},
{
"input": "6 3",
"output": "2 0 4"
},
{
"inp... | 1,695,114,008 | 2,147,483,647 | Python 3 | OK | TESTS | 38 | 46 | 0 | a, b = map(int, input().split())
first = 0
draw = 0
second = 0
for i in range(1, 7):
if abs(a-i) < abs(b-i):
first += 1
elif abs(a-i) == abs(b-i):
draw += 1
else:
second += 1
print(first, draw, second) | Title: Playing with Dice
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Two players are playing a game. First each of them writes an integer from 1 to 6, and then a dice is thrown. The player whose written number got closer to the number on the dice wins. If both payers have the same diff... | ```python
a, b = map(int, input().split())
first = 0
draw = 0
second = 0
for i in range(1, 7):
if abs(a-i) < abs(b-i):
first += 1
elif abs(a-i) == abs(b-i):
draw += 1
else:
second += 1
print(first, draw, second)
``` | 3 | |
431 | A | Black Square | PROGRAMMING | 800 | [
"implementation"
] | null | null | Quite recently, a very smart student named Jury decided that lectures are boring, so he downloaded a game called "Black Square" on his super cool touchscreen phone.
In this game, the phone's screen is divided into four vertical strips. Each second, a black square appears on some of the strips. According to the rules o... | The first line contains four space-separated integers *a*1, *a*2, *a*3, *a*4 (0<=≤<=*a*1,<=*a*2,<=*a*3,<=*a*4<=≤<=104).
The second line contains string *s* (1<=≤<=|*s*|<=≤<=105), where the *і*-th character of the string equals "1", if on the *i*-th second of the game the square appears on the first strip, "2", if it a... | Print a single integer — the total number of calories that Jury wastes. | [
"1 2 3 4\n123214\n",
"1 5 3 2\n11221\n"
] | [
"13\n",
"13\n"
] | none | 500 | [
{
"input": "1 2 3 4\n123214",
"output": "13"
},
{
"input": "1 5 3 2\n11221",
"output": "13"
},
{
"input": "5 5 5 1\n3422",
"output": "16"
},
{
"input": "4 3 2 1\n2",
"output": "3"
},
{
"input": "5651 6882 6954 4733\n2442313421",
"output": "60055"
},
{
... | 1,661,537,509 | 2,147,483,647 | Python 3 | OK | TESTS | 49 | 78 | 0 | s = input().split()
s = [int(i) for i in s]
g = input()
ans = 0
for i in g:
ans += s[int(i) - 1]
print(ans)
| Title: Black Square
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Quite recently, a very smart student named Jury decided that lectures are boring, so he downloaded a game called "Black Square" on his super cool touchscreen phone.
In this game, the phone's screen is divided into four ve... | ```python
s = input().split()
s = [int(i) for i in s]
g = input()
ans = 0
for i in g:
ans += s[int(i) - 1]
print(ans)
``` | 3 | |
1,009 | D | Relatively Prime Graph | PROGRAMMING | 1,700 | [
"brute force",
"constructive algorithms",
"graphs",
"greedy",
"math"
] | null | null | Let's call an undirected graph $G = (V, E)$ relatively prime if and only if for each edge $(v, u) \in E$ $GCD(v, u) = 1$ (the greatest common divisor of $v$ and $u$ is $1$). If there is no edge between some pair of vertices $v$ and $u$ then the value of $GCD(v, u)$ doesn't matter. The vertices are numbered from $1$ to... | The only line contains two integers $n$ and $m$ ($1 \le n, m \le 10^5$) — the number of vertices and the number of edges. | If there exists no valid graph with the given number of vertices and edges then output "Impossible".
Otherwise print the answer in the following format:
The first line should contain the word "Possible".
The $i$-th of the next $m$ lines should contain the $i$-th edge $(v_i, u_i)$ of the resulting graph ($1 \le v_i, ... | [
"5 6\n",
"6 12\n"
] | [
"Possible\n2 5\n3 2\n5 1\n3 4\n4 1\n5 4\n",
"Impossible\n"
] | Here is the representation of the graph from the first example: <img class="tex-graphics" src="https://espresso.codeforces.com/7a1353a992545456c007e3071fa0a06fe46fc64e.png" style="max-width: 100.0%;max-height: 100.0%;"/> | 0 | [
{
"input": "5 6",
"output": "Possible\n2 1\n3 1\n4 1\n5 1\n3 2\n5 2"
},
{
"input": "6 12",
"output": "Impossible"
},
{
"input": "572 99643",
"output": "Possible\n2 1\n3 1\n4 1\n5 1\n6 1\n7 1\n8 1\n9 1\n10 1\n11 1\n12 1\n13 1\n14 1\n15 1\n16 1\n17 1\n18 1\n19 1\n20 1\n21 1\n22 1\n23 1... | 1,585,728,236 | 2,147,483,647 | PyPy 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | #include<bits/stdc++.h>
using namespace std;
#define ll long long
#define mod 1000000007ll
#define vll vector<ll>
#define pll pair<ll,ll>
#define vpll vector<pll>
#define pb push_back
#define mp make_pair
#define x first
#define y second
#define db(x) cout << #x << " = " << x << '\n'
#define sep cout << "\n***********... | Title: Relatively Prime Graph
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Let's call an undirected graph $G = (V, E)$ relatively prime if and only if for each edge $(v, u) \in E$ $GCD(v, u) = 1$ (the greatest common divisor of $v$ and $u$ is $1$). If there is no edge between some pair... | ```python
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define mod 1000000007ll
#define vll vector<ll>
#define pll pair<ll,ll>
#define vpll vector<pll>
#define pb push_back
#define mp make_pair
#define x first
#define y second
#define db(x) cout << #x << " = " << x << '\n'
#define sep cout << "\n*... | -1 | |
492 | B | Vanya and Lanterns | PROGRAMMING | 1,200 | [
"binary search",
"implementation",
"math",
"sortings"
] | null | null | Vanya walks late at night along a straight street of length *l*, lit by *n* lanterns. Consider the coordinate system with the beginning of the street corresponding to the point 0, and its end corresponding to the point *l*. Then the *i*-th lantern is at the point *a**i*. The lantern lights all points of the street that... | The first line contains two integers *n*, *l* (1<=≤<=*n*<=≤<=1000, 1<=≤<=*l*<=≤<=109) — the number of lanterns and the length of the street respectively.
The next line contains *n* integers *a**i* (0<=≤<=*a**i*<=≤<=*l*). Multiple lanterns can be located at the same point. The lanterns may be located at the ends of th... | Print the minimum light radius *d*, needed to light the whole street. The answer will be considered correct if its absolute or relative error doesn't exceed 10<=-<=9. | [
"7 15\n15 5 3 7 9 14 0\n",
"2 5\n2 5\n"
] | [
"2.5000000000\n",
"2.0000000000\n"
] | Consider the second sample. At *d* = 2 the first lantern will light the segment [0, 4] of the street, and the second lantern will light segment [3, 5]. Thus, the whole street will be lit. | 1,000 | [
{
"input": "7 15\n15 5 3 7 9 14 0",
"output": "2.5000000000"
},
{
"input": "2 5\n2 5",
"output": "2.0000000000"
},
{
"input": "46 615683844\n431749087 271781274 274974690 324606253 480870261 401650581 13285442 478090364 266585394 425024433 588791449 492057200 391293435 563090494 317950 1... | 1,694,018,724 | 2,147,483,647 | PyPy 3-64 | RUNTIME_ERROR | TESTS | 0 | 62 | 2,764,800 | n=int(input())
a=[]
a=list(map(int,input().split()))
a.sort()
ans=0.0
for i in range(1,n):
ans=max(ans,(a[i]-a[i-1])/2)
print("{.9f}".format(ans)) | Title: Vanya and Lanterns
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vanya walks late at night along a straight street of length *l*, lit by *n* lanterns. Consider the coordinate system with the beginning of the street corresponding to the point 0, and its end corresponding to the poi... | ```python
n=int(input())
a=[]
a=list(map(int,input().split()))
a.sort()
ans=0.0
for i in range(1,n):
ans=max(ans,(a[i]-a[i-1])/2)
print("{.9f}".format(ans))
``` | -1 | |
610 | B | Vika and Squares | PROGRAMMING | 1,300 | [
"constructive algorithms",
"implementation"
] | null | null | Vika has *n* jars with paints of distinct colors. All the jars are numbered from 1 to *n* and the *i*-th jar contains *a**i* liters of paint of color *i*.
Vika also has an infinitely long rectangular piece of paper of width 1, consisting of squares of size 1<=×<=1. Squares are numbered 1, 2, 3 and so on. Vika decided ... | The first line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=200<=000) — the number of jars with colors Vika has.
The second line of the input contains a sequence of integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=109), where *a**i* is equal to the number of liters of paint in the *i*-th jar, i.e. th... | The only line of the output should contain a single integer — the maximum number of squares that Vika can paint if she follows the rules described above. | [
"5\n2 4 2 3 3\n",
"3\n5 5 5\n",
"6\n10 10 10 1 10 10\n"
] | [
"12\n",
"15\n",
"11\n"
] | In the first sample the best strategy is to start painting using color 4. Then the squares will be painted in the following colors (from left to right): 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5.
In the second sample Vika can start to paint using any color.
In the third sample Vika should start painting using color number 5... | 1,000 | [
{
"input": "5\n2 4 2 3 3",
"output": "12"
},
{
"input": "3\n5 5 5",
"output": "15"
},
{
"input": "6\n10 10 10 1 10 10",
"output": "11"
},
{
"input": "1\n167959139",
"output": "167959139"
},
{
"input": "10\n896619242 805194919 844752453 848347723 816995848 85681361... | 1,667,480,461 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 66 | 139 | 26,624,000 |
n = int(input())
array = tuple(map(int, input().split()))
min_el = min(array)
if array.count(min_el) == 1:
print(n * min_el + n-1)
else:
first_occurence = array.index(min_el)
right_pointer = first_occurence
max_len = 0
for i in range(first_occurence + 1, n):
if min_el == ... | Title: Vika and Squares
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vika has *n* jars with paints of distinct colors. All the jars are numbered from 1 to *n* and the *i*-th jar contains *a**i* liters of paint of color *i*.
Vika also has an infinitely long rectangular piece of paper of... | ```python
n = int(input())
array = tuple(map(int, input().split()))
min_el = min(array)
if array.count(min_el) == 1:
print(n * min_el + n-1)
else:
first_occurence = array.index(min_el)
right_pointer = first_occurence
max_len = 0
for i in range(first_occurence + 1, n):
if ... | 3 | |
327 | A | Flipping Game | PROGRAMMING | 1,200 | [
"brute force",
"dp",
"implementation"
] | null | null | Iahub got bored, so he invented a game to be played on paper.
He writes *n* integers *a*1,<=*a*2,<=...,<=*a**n*. Each of those integers can be either 0 or 1. He's allowed to do exactly one move: he chooses two indices *i* and *j* (1<=≤<=*i*<=≤<=*j*<=≤<=*n*) and flips all values *a**k* for which their positions are in... | The first line of the input contains an integer *n* (1<=≤<=*n*<=≤<=100). In the second line of the input there are *n* integers: *a*1,<=*a*2,<=...,<=*a**n*. It is guaranteed that each of those *n* values is either 0 or 1. | Print an integer — the maximal number of 1s that can be obtained after exactly one move. | [
"5\n1 0 0 1 0\n",
"4\n1 0 0 1\n"
] | [
"4\n",
"4\n"
] | In the first case, flip the segment from 2 to 5 (*i* = 2, *j* = 5). That flip changes the sequence, it becomes: [1 1 1 0 1]. So, it contains four ones. There is no way to make the whole sequence equal to [1 1 1 1 1].
In the second case, flipping only the second and the third element (*i* = 2, *j* = 3) will turn all nu... | 500 | [
{
"input": "5\n1 0 0 1 0",
"output": "4"
},
{
"input": "4\n1 0 0 1",
"output": "4"
},
{
"input": "1\n1",
"output": "0"
},
{
"input": "1\n0",
"output": "1"
},
{
"input": "8\n1 0 0 0 1 0 0 0",
"output": "7"
},
{
"input": "18\n0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... | 1,671,966,063 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 2 | 92 | 0 | import sys
def get_ints(): return map(int, sys.stdin.readline().strip().split())
x = int(input())
a = list(get_ints())
maxOne = 0
for num in a:
if num == 1:
maxOne += 1
for i in range(x):
for j in range(i, x):
oneCount = 0
pointer = 0
for num in a:
if... | Title: Flipping Game
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Iahub got bored, so he invented a game to be played on paper.
He writes *n* integers *a*1,<=*a*2,<=...,<=*a**n*. Each of those integers can be either 0 or 1. He's allowed to do exactly one move: he chooses two indices *... | ```python
import sys
def get_ints(): return map(int, sys.stdin.readline().strip().split())
x = int(input())
a = list(get_ints())
maxOne = 0
for num in a:
if num == 1:
maxOne += 1
for i in range(x):
for j in range(i, x):
oneCount = 0
pointer = 0
for num in a:
... | 0 | |
228 | A | Is your horseshoe on the other hoof? | PROGRAMMING | 800 | [
"implementation"
] | null | null | Valera the Horse is going to the party with friends. He has been following the fashion trends for a while, and he knows that it is very popular to wear all horseshoes of different color. Valera has got four horseshoes left from the last year, but maybe some of them have the same color. In this case he needs to go to th... | The first line contains four space-separated integers *s*1,<=*s*2,<=*s*3,<=*s*4 (1<=≤<=*s*1,<=*s*2,<=*s*3,<=*s*4<=≤<=109) — the colors of horseshoes Valera has.
Consider all possible colors indexed with integers. | Print a single integer — the minimum number of horseshoes Valera needs to buy. | [
"1 7 3 3\n",
"7 7 7 7\n"
] | [
"1\n",
"3\n"
] | none | 500 | [
{
"input": "1 7 3 3",
"output": "1"
},
{
"input": "7 7 7 7",
"output": "3"
},
{
"input": "81170865 673572653 756938629 995577259",
"output": "0"
},
{
"input": "3491663 217797045 522540872 715355328",
"output": "0"
},
{
"input": "251590420 586975278 916631563 58697... | 1,688,404,035 | 2,147,483,647 | Python 3 | MEMORY_LIMIT_EXCEEDED | TESTS | 2 | 436 | 268,390,400 | colors = list(map(int, input().split()))
unique_colors = 0
count = [0] * (max(colors) + 1)
for color in colors:
if count[color] == 0:
unique_colors += 1
count[color] += 1
min_horseshoes_to_buy = 4 - unique_colors
print(min_horseshoes_to_buy) | Title: Is your horseshoe on the other hoof?
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Valera the Horse is going to the party with friends. He has been following the fashion trends for a while, and he knows that it is very popular to wear all horseshoes of different color. Valera has ... | ```python
colors = list(map(int, input().split()))
unique_colors = 0
count = [0] * (max(colors) + 1)
for color in colors:
if count[color] == 0:
unique_colors += 1
count[color] += 1
min_horseshoes_to_buy = 4 - unique_colors
print(min_horseshoes_to_buy)
``` | 0 | |
632 | D | Longest Subsequence | PROGRAMMING | 2,100 | [
"brute force",
"math",
"number theory"
] | null | null | You are given array *a* with *n* elements and the number *m*. Consider some subsequence of *a* and the value of least common multiple (LCM) of its elements. Denote LCM as *l*. Find any longest subsequence of *a* with the value *l*<=≤<=*m*.
A subsequence of *a* is an array we can get by erasing some elements of *a*. It... | The first line contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=106) — the size of the array *a* and the parameter from the problem statement.
The second line contains *n* integers *a**i* (1<=≤<=*a**i*<=≤<=109) — the elements of *a*. | In the first line print two integers *l* and *k**max* (1<=≤<=*l*<=≤<=*m*,<=0<=≤<=*k**max*<=≤<=*n*) — the value of LCM and the number of elements in optimal subsequence.
In the second line print *k**max* integers — the positions of the elements from the optimal subsequence in the ascending order.
Note that you can fin... | [
"7 8\n6 2 9 2 7 2 3\n",
"6 4\n2 2 2 3 3 3\n"
] | [
"6 5\n1 2 4 6 7\n",
"2 3\n1 2 3\n"
] | none | 0 | [
{
"input": "7 8\n6 2 9 2 7 2 3",
"output": "6 5\n1 2 4 6 7"
},
{
"input": "6 4\n2 2 2 3 3 3",
"output": "2 3\n1 2 3"
},
{
"input": "10 50\n39 22 60 88 11 65 41 85 65 100",
"output": "22 2\n2 5"
},
{
"input": "100 343\n999 284 486 785 176 742 856 415 992 601 600 122 460 214 33... | 1,457,175,944 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 93 | 1,228,800 | from fractions import gcd
from functools import reduce
n,m = map(int,input().split())
a = list(map(int,input().split()))
d = {}
for v in a:
if v<=m:
d[v] = d.setdefault(v,0)+1
l = sorted([i for i in d])
s = set(l)
ans, mx = 0, 0
for i in range(m+1):
j, tmp = 0, 0
while l[j]*l[j]<=i:
if i%l[j]==... | Title: Longest Subsequence
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given array *a* with *n* elements and the number *m*. Consider some subsequence of *a* and the value of least common multiple (LCM) of its elements. Denote LCM as *l*. Find any longest subsequence of *a* wit... | ```python
from fractions import gcd
from functools import reduce
n,m = map(int,input().split())
a = list(map(int,input().split()))
d = {}
for v in a:
if v<=m:
d[v] = d.setdefault(v,0)+1
l = sorted([i for i in d])
s = set(l)
ans, mx = 0, 0
for i in range(m+1):
j, tmp = 0, 0
while l[j]*l[j]<=i:
i... | 0 | |
270 | A | Fancy Fence | PROGRAMMING | 1,100 | [
"geometry",
"implementation",
"math"
] | null | null | Emuskald needs a fence around his farm, but he is too lazy to build it himself. So he purchased a fence-building robot.
He wants the fence to be a regular polygon. The robot builds the fence along a single path, but it can only make fence corners at a single angle *a*.
Will the robot be able to build the fence Emuska... | The first line of input contains an integer *t* (0<=<<=*t*<=<<=180) — the number of tests. Each of the following *t* lines contains a single integer *a* (0<=<<=*a*<=<<=180) — the angle the robot can make corners at measured in degrees. | For each test, output on a single line "YES" (without quotes), if the robot can build a fence Emuskald wants, and "NO" (without quotes), if it is impossible. | [
"3\n30\n60\n90\n"
] | [
"NO\nYES\nYES\n"
] | In the first test case, it is impossible to build the fence, since there is no regular polygon with angle <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/df5f4b07dd5316fde165b43657b2696e2919e791.png" style="max-width: 100.0%;max-height: 100.0%;"/>.
In the second test case, the fence is a r... | 500 | [
{
"input": "3\n30\n60\n90",
"output": "NO\nYES\nYES"
},
{
"input": "6\n1\n2\n3\n170\n179\n25",
"output": "NO\nNO\nNO\nYES\nYES\nNO"
}
] | 1,696,936,351 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 62 | 0 | for i in range(int(input())):
N=0
a=int(input())
for t in range(3,180):
if a==(t-2)*180/t:
print('YES')
N=1
break
else:
continue
if N==0:
print('NO') | Title: Fancy Fence
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Emuskald needs a fence around his farm, but he is too lazy to build it himself. So he purchased a fence-building robot.
He wants the fence to be a regular polygon. The robot builds the fence along a single path, but it can... | ```python
for i in range(int(input())):
N=0
a=int(input())
for t in range(3,180):
if a==(t-2)*180/t:
print('YES')
N=1
break
else:
continue
if N==0:
print('NO')
``` | 0 | |
50 | A | Domino piling | PROGRAMMING | 800 | [
"greedy",
"math"
] | A. Domino piling | 2 | 256 | You are given a rectangular board of *M*<=×<=*N* squares. Also you are given an unlimited number of standard domino pieces of 2<=×<=1 squares. You are allowed to rotate the pieces. You are asked to place as many dominoes as possible on the board so as to meet the following conditions:
1. Each domino completely covers ... | In a single line you are given two integers *M* and *N* — board sizes in squares (1<=≤<=*M*<=≤<=*N*<=≤<=16). | Output one number — the maximal number of dominoes, which can be placed. | [
"2 4\n",
"3 3\n"
] | [
"4\n",
"4\n"
] | none | 500 | [
{
"input": "2 4",
"output": "4"
},
{
"input": "3 3",
"output": "4"
},
{
"input": "1 5",
"output": "2"
},
{
"input": "1 6",
"output": "3"
},
{
"input": "1 15",
"output": "7"
},
{
"input": "1 16",
"output": "8"
},
{
"input": "2 5",
"outpu... | 1,678,186,279 | 2,147,483,647 | Python 3 | OK | TESTS | 35 | 92 | 0 | num = input()
num = num.split()
sum_num = int(num[0]) * int(num[1])
result = sum_num // 2
print(result)
| Title: Domino piling
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
You are given a rectangular board of *M*<=×<=*N* squares. Also you are given an unlimited number of standard domino pieces of 2<=×<=1 squares. You are allowed to rotate the pieces. You are asked to place as many dominoes as p... | ```python
num = input()
num = num.split()
sum_num = int(num[0]) * int(num[1])
result = sum_num // 2
print(result)
``` | 3.977 |
389 | B | Fox and Cross | PROGRAMMING | 1,100 | [
"greedy",
"implementation"
] | null | null | Fox Ciel has a board with *n* rows and *n* columns. So, the board consists of *n*<=×<=*n* cells. Each cell contains either a symbol '.', or a symbol '#'.
A cross on the board is a connected set of exactly five cells of the board that looks like a cross. The picture below shows how it looks.
Ciel wants to draw several... | The first line contains an integer *n* (3<=≤<=*n*<=≤<=100) — the size of the board.
Each of the next *n* lines describes one row of the board. The *i*-th line describes the *i*-th row of the board and consists of *n* characters. Each character is either a symbol '.', or a symbol '#'. | Output a single line with "YES" if Ciel can draw the crosses in the described way. Otherwise output a single line with "NO". | [
"5\n.#...\n####.\n.####\n...#.\n.....\n",
"4\n####\n####\n####\n####\n",
"6\n.#....\n####..\n.####.\n.#.##.\n######\n.#..#.\n",
"6\n.#..#.\n######\n.####.\n.####.\n######\n.#..#.\n",
"3\n...\n...\n...\n"
] | [
"YES\n",
"NO\n",
"YES\n",
"NO\n",
"YES\n"
] | In example 1, you can draw two crosses. The picture below shows what they look like.
In example 2, the board contains 16 cells with '#', but each cross contains 5. Since 16 is not a multiple of 5, so it's impossible to cover all. | 1,000 | [
{
"input": "4\n####\n####\n####\n####",
"output": "NO"
},
{
"input": "6\n.#....\n####..\n.####.\n.#.##.\n######\n.#..#.",
"output": "YES"
},
{
"input": "6\n.#..#.\n######\n.####.\n.####.\n######\n.#..#.",
"output": "NO"
},
{
"input": "5\n.....\n.#...\n####.\n.####\n...#.",
... | 1,391,523,862 | 2,147,483,647 | Python 3 | OK | TESTS | 42 | 62 | 512,000 | n=int(input())
a=[[] for i in range(n)]
for i in range(n):
s=input().strip()
for j in s:
a[i]+=[j]
kr=0
for i in range(n):
for j in range(n):
#print(i,j)
if a[i][j]=='#':
kr+=1
if 0<i<n-1 and 0<j<n-1 and a[i][j]=='#':
if a[i][j-1]==a[i][j+... | Title: Fox and Cross
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Fox Ciel has a board with *n* rows and *n* columns. So, the board consists of *n*<=×<=*n* cells. Each cell contains either a symbol '.', or a symbol '#'.
A cross on the board is a connected set of exactly five cells of t... | ```python
n=int(input())
a=[[] for i in range(n)]
for i in range(n):
s=input().strip()
for j in s:
a[i]+=[j]
kr=0
for i in range(n):
for j in range(n):
#print(i,j)
if a[i][j]=='#':
kr+=1
if 0<i<n-1 and 0<j<n-1 and a[i][j]=='#':
if a[i][j-1... | 3 | |
58 | A | Chat room | PROGRAMMING | 1,000 | [
"greedy",
"strings"
] | A. Chat room | 1 | 256 | Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letters can be deleted from the typed word so that it resulted in the word "hello". For example, ... | The first and only line contains the word *s*, which Vasya typed. This word consisits of small Latin letters, its length is no less that 1 and no more than 100 letters. | If Vasya managed to say hello, print "YES", otherwise print "NO". | [
"ahhellllloou\n",
"hlelo\n"
] | [
"YES\n",
"NO\n"
] | none | 500 | [
{
"input": "ahhellllloou",
"output": "YES"
},
{
"input": "hlelo",
"output": "NO"
},
{
"input": "helhcludoo",
"output": "YES"
},
{
"input": "hehwelloho",
"output": "YES"
},
{
"input": "pnnepelqomhhheollvlo",
"output": "YES"
},
{
"input": "tymbzjyqhymeda... | 1,696,351,890 | 2,147,483,647 | Python 3 | OK | TESTS | 40 | 46 | 0 |
s = input()
pointer = 0
for char in s:
if char == "hello"[pointer]:
pointer += 1
if pointer == 5:
print("YES")
break
else:
print("NO")
| Title: Chat room
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letter... | ```python
s = input()
pointer = 0
for char in s:
if char == "hello"[pointer]:
pointer += 1
if pointer == 5:
print("YES")
break
else:
print("NO")
``` | 3.977 |
58 | A | Chat room | PROGRAMMING | 1,000 | [
"greedy",
"strings"
] | A. Chat room | 1 | 256 | Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letters can be deleted from the typed word so that it resulted in the word "hello". For example, ... | The first and only line contains the word *s*, which Vasya typed. This word consisits of small Latin letters, its length is no less that 1 and no more than 100 letters. | If Vasya managed to say hello, print "YES", otherwise print "NO". | [
"ahhellllloou\n",
"hlelo\n"
] | [
"YES\n",
"NO\n"
] | none | 500 | [
{
"input": "ahhellllloou",
"output": "YES"
},
{
"input": "hlelo",
"output": "NO"
},
{
"input": "helhcludoo",
"output": "YES"
},
{
"input": "hehwelloho",
"output": "YES"
},
{
"input": "pnnepelqomhhheollvlo",
"output": "YES"
},
{
"input": "tymbzjyqhymeda... | 1,634,912,035 | 2,147,483,647 | Python 3 | OK | TESTS | 40 | 61 | 4,300,800 | s=input()
s1="hello"
pos=0
ans="NO"
for i in range(0, len(s)):
if s[i]==s1[pos]:
pos=pos+1
if pos==5:
ans="YES"
break
print(ans)
| Title: Chat room
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letter... | ```python
s=input()
s1="hello"
pos=0
ans="NO"
for i in range(0, len(s)):
if s[i]==s1[pos]:
pos=pos+1
if pos==5:
ans="YES"
break
print(ans)
``` | 3.961489 |
437 | D | The Child and Zoo | PROGRAMMING | 1,900 | [
"dsu",
"sortings"
] | null | null | Of course our child likes walking in a zoo. The zoo has *n* areas, that are numbered from 1 to *n*. The *i*-th area contains *a**i* animals in it. Also there are *m* roads in the zoo, and each road connects two distinct areas. Naturally the zoo is connected, so you can reach any area of the zoo from any other area usin... | The first line contains two integers *n* and *m* (2<=≤<=*n*<=≤<=105; 0<=≤<=*m*<=≤<=105). The second line contains *n* integers: *a*1,<=*a*2,<=...,<=*a**n* (0<=≤<=*a**i*<=≤<=105). Then follow *m* lines, each line contains two integers *x**i* and *y**i* (1<=≤<=*x**i*,<=*y**i*<=≤<=*n*; *x**i*<=≠<=*y**i*), denoting the roa... | Output a real number — the value of .
The answer will be considered correct if its relative or absolute error doesn't exceed 10<=-<=4. | [
"4 3\n10 20 30 40\n1 3\n2 3\n4 3\n",
"3 3\n10 20 30\n1 2\n2 3\n3 1\n",
"7 8\n40 20 10 30 20 50 40\n1 2\n2 3\n3 4\n4 5\n5 6\n6 7\n1 4\n5 7\n"
] | [
"16.666667\n",
"13.333333\n",
"18.571429\n"
] | Consider the first sample. There are 12 possible situations:
- *p* = 1, *q* = 3, *f*(*p*, *q*) = 10. - *p* = 2, *q* = 3, *f*(*p*, *q*) = 20. - *p* = 4, *q* = 3, *f*(*p*, *q*) = 30. - *p* = 1, *q* = 2, *f*(*p*, *q*) = 10. - *p* = 2, *q* = 4, *f*(*p*, *q*) = 20. - *p* = 4, *q* = 1, *f*(*p*, *q*) = 10.
Another 6 c... | 2,000 | [
{
"input": "4 3\n10 20 30 40\n1 3\n2 3\n4 3",
"output": "16.666667"
},
{
"input": "3 3\n10 20 30\n1 2\n2 3\n3 1",
"output": "13.333333"
},
{
"input": "7 8\n40 20 10 30 20 50 40\n1 2\n2 3\n3 4\n4 5\n5 6\n6 7\n1 4\n5 7",
"output": "18.571429"
},
{
"input": "10 14\n594 965 90 32... | 1,682,744,123 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 9 | 888 | 28,364,800 | n,m = map(int,input().split())
val = list(map(int, input().split()))
arr = [(idx + 1, x) for idx,x in enumerate(val)]
arr.sort(key = lambda x: x[1])
adj = [[] for i in range(n + 1)]
val = [0] + val
for i in range(m):
u,v = map(int,input().split())
adj[u].append(v)
adj[v].append(u)
parent = [... | Title: The Child and Zoo
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Of course our child likes walking in a zoo. The zoo has *n* areas, that are numbered from 1 to *n*. The *i*-th area contains *a**i* animals in it. Also there are *m* roads in the zoo, and each road connects two distin... | ```python
n,m = map(int,input().split())
val = list(map(int, input().split()))
arr = [(idx + 1, x) for idx,x in enumerate(val)]
arr.sort(key = lambda x: x[1])
adj = [[] for i in range(n + 1)]
val = [0] + val
for i in range(m):
u,v = map(int,input().split())
adj[u].append(v)
adj[v].append(u)
... | 0 | |
870 | A | Search for Pretty Integers | PROGRAMMING | 900 | [
"brute force",
"implementation"
] | null | null | You are given two lists of non-zero digits.
Let's call an integer pretty if its (base 10) representation has at least one digit from the first list and at least one digit from the second list. What is the smallest positive pretty integer? | The first line contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=9) — the lengths of the first and the second lists, respectively.
The second line contains *n* distinct digits *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=9) — the elements of the first list.
The third line contains *m* distinct digits *b*1,<=*b*2... | Print the smallest pretty integer. | [
"2 3\n4 2\n5 7 6\n",
"8 8\n1 2 3 4 5 6 7 8\n8 7 6 5 4 3 2 1\n"
] | [
"25\n",
"1\n"
] | In the first example 25, 46, 24567 are pretty, as well as many other integers. The smallest among them is 25. 42 and 24 are not pretty because they don't have digits from the second list.
In the second example all integers that have at least one digit different from 9 are pretty. It's obvious that the smallest among t... | 500 | [
{
"input": "2 3\n4 2\n5 7 6",
"output": "25"
},
{
"input": "8 8\n1 2 3 4 5 6 7 8\n8 7 6 5 4 3 2 1",
"output": "1"
},
{
"input": "1 1\n9\n1",
"output": "19"
},
{
"input": "9 1\n5 4 2 3 6 1 7 9 8\n9",
"output": "9"
},
{
"input": "5 3\n7 2 5 8 6\n3 1 9",
"output"... | 1,681,640,185 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 19 | 62 | 0 | n, m = map(int, input().split())
a = list(map(int, input().split()))
b = list(map(int, input().split()))
mina, minb = min(a), min(b)
if mina in b:
print(mina)
elif minb in a:
print(minb)
else:
print(min(int(str(mina) + str(minb)), int(str(minb) + str(mina))))
| Title: Search for Pretty Integers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given two lists of non-zero digits.
Let's call an integer pretty if its (base 10) representation has at least one digit from the first list and at least one digit from the second list. What is the sm... | ```python
n, m = map(int, input().split())
a = list(map(int, input().split()))
b = list(map(int, input().split()))
mina, minb = min(a), min(b)
if mina in b:
print(mina)
elif minb in a:
print(minb)
else:
print(min(int(str(mina) + str(minb)), int(str(minb) + str(mina))))
``` | 0 | |
916 | A | Jamie and Alarm Snooze | PROGRAMMING | 900 | [
"brute force",
"implementation",
"math"
] | null | null | Jamie loves sleeping. One day, he decides that he needs to wake up at exactly *hh*:<=*mm*. However, he hates waking up, so he wants to make waking up less painful by setting the alarm at a lucky time. He will then press the snooze button every *x* minutes until *hh*:<=*mm* is reached, and only then he will wake up. He ... | The first line contains a single integer *x* (1<=≤<=*x*<=≤<=60).
The second line contains two two-digit integers, *hh* and *mm* (00<=≤<=*hh*<=≤<=23,<=00<=≤<=*mm*<=≤<=59). | Print the minimum number of times he needs to press the button. | [
"3\n11 23\n",
"5\n01 07\n"
] | [
"2\n",
"0\n"
] | In the first sample, Jamie needs to wake up at 11:23. So, he can set his alarm at 11:17. He would press the snooze button when the alarm rings at 11:17 and at 11:20.
In the second sample, Jamie can set his alarm at exactly at 01:07 which is lucky. | 500 | [
{
"input": "3\n11 23",
"output": "2"
},
{
"input": "5\n01 07",
"output": "0"
},
{
"input": "34\n09 24",
"output": "3"
},
{
"input": "2\n14 37",
"output": "0"
},
{
"input": "14\n19 54",
"output": "9"
},
{
"input": "42\n15 44",
"output": "12"
},
... | 1,516,373,247 | 747 | Python 3 | OK | TESTS | 254 | 77 | 5,632,000 | # x = 3
# desired_str = "11 23"
# x = 5
# desired_str = "01 07"
x = int(input())
desired_str = input()
presses = 0
desired = [int(i) for i in desired_str.split()]
while True:
if desired_str.find("7") >= 0:
break
else:
desired[1] -= x
if desired[1] < 0:
desired[0] -= 1
desired[1] += 60
presses += 1
... | Title: Jamie and Alarm Snooze
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Jamie loves sleeping. One day, he decides that he needs to wake up at exactly *hh*:<=*mm*. However, he hates waking up, so he wants to make waking up less painful by setting the alarm at a lucky time. He will the... | ```python
# x = 3
# desired_str = "11 23"
# x = 5
# desired_str = "01 07"
x = int(input())
desired_str = input()
presses = 0
desired = [int(i) for i in desired_str.split()]
while True:
if desired_str.find("7") >= 0:
break
else:
desired[1] -= x
if desired[1] < 0:
desired[0] -= 1
desired[1] += 60
pre... | 3 | |
14 | A | Letter | PROGRAMMING | 800 | [
"implementation"
] | A. Letter | 1 | 64 | A boy Bob likes to draw. Not long ago he bought a rectangular graph (checked) sheet with *n* rows and *m* columns. Bob shaded some of the squares on the sheet. Having seen his masterpiece, he decided to share it with his elder brother, who lives in Flatland. Now Bob has to send his picture by post, but because of the w... | The first line of the input data contains numbers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=50), *n* — amount of lines, and *m* — amount of columns on Bob's sheet. The following *n* lines contain *m* characters each. Character «.» stands for a non-shaded square on the sheet, and «*» — for a shaded square. It is guaranteed that ... | Output the required rectangle of the minimum cost. Study the output data in the sample tests to understand the output format better. | [
"6 7\n.......\n..***..\n..*....\n..***..\n..*....\n..***..\n",
"3 3\n***\n*.*\n***\n"
] | [
"***\n*..\n***\n*..\n***\n",
"***\n*.*\n***\n"
] | none | 0 | [
{
"input": "6 7\n.......\n..***..\n..*....\n..***..\n..*....\n..***..",
"output": "***\n*..\n***\n*..\n***"
},
{
"input": "3 3\n***\n*.*\n***",
"output": "***\n*.*\n***"
},
{
"input": "1 1\n*",
"output": "*"
},
{
"input": "2 1\n*\n*",
"output": "*\n*"
},
{
"input"... | 1,622,125,637 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 124 | 0 | n,m=map(int,input().split())
k=[]
for i in range(n):
k.append(input())
strow=[]
stcol=[]
for i in range(n):
if "*" in k[i]:
strow.append(i)
stcol.append(k[i].find("*"))
stcol.append(k[i].rfind("*"))
srow=min(strow)
erow=max(strow)
scol=min(stcol)
ecol=max(stcol)+1
... | Title: Letter
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
A boy Bob likes to draw. Not long ago he bought a rectangular graph (checked) sheet with *n* rows and *m* columns. Bob shaded some of the squares on the sheet. Having seen his masterpiece, he decided to share it with his elder brothe... | ```python
n,m=map(int,input().split())
k=[]
for i in range(n):
k.append(input())
strow=[]
stcol=[]
for i in range(n):
if "*" in k[i]:
strow.append(i)
stcol.append(k[i].find("*"))
stcol.append(k[i].rfind("*"))
srow=min(strow)
erow=max(strow)
scol=min(stcol)
ecol=max(... | 3.938 |
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