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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
25 | A | IQ test | PROGRAMMING | 1,300 | [
"brute force"
] | A. IQ test | 2 | 256 | Bob is preparing to pass IQ test. The most frequent task in this test is to find out which one of the given *n* numbers differs from the others. Bob observed that one number usually differs from the others in evenness. Help Bob — to check his answers, he needs a program that among the given *n* numbers finds one that i... | The first line contains integer *n* (3<=≤<=*n*<=≤<=100) — amount of numbers in the task. The second line contains *n* space-separated natural numbers, not exceeding 100. It is guaranteed, that exactly one of these numbers differs from the others in evenness. | Output index of number that differs from the others in evenness. Numbers are numbered from 1 in the input order. | [
"5\n2 4 7 8 10\n",
"4\n1 2 1 1\n"
] | [
"3\n",
"2\n"
] | none | 0 | [
{
"input": "5\n2 4 7 8 10",
"output": "3"
},
{
"input": "4\n1 2 1 1",
"output": "2"
},
{
"input": "3\n1 2 2",
"output": "1"
},
{
"input": "3\n100 99 100",
"output": "2"
},
{
"input": "3\n5 3 2",
"output": "3"
},
{
"input": "4\n43 28 1 91",
"output"... | 1,601,364,099 | 2,147,483,647 | Python 3 | OK | TESTS | 32 | 216 | 0 | n=int(input())
a=[int(i)%2 for i in input().split()]
o=e=0
for i in range(n):
if a[i]:
o+=1
else:
e+=1
if o<e:
for i in range(n):
if a[i]:
print(i+1)
break
else:
for i in range(n):
if not a[i]:
print(i+1)
br... | Title: IQ test
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Bob is preparing to pass IQ test. The most frequent task in this test is to find out which one of the given *n* numbers differs from the others. Bob observed that one number usually differs from the others in evenness. Help Bob — t... | ```python
n=int(input())
a=[int(i)%2 for i in input().split()]
o=e=0
for i in range(n):
if a[i]:
o+=1
else:
e+=1
if o<e:
for i in range(n):
if a[i]:
print(i+1)
break
else:
for i in range(n):
if not a[i]:
print(i+1)
... | 3.946 |
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 ... | 1,687,689,333 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 31 | 0 | def find_primes(n):
sieve = [True] * (n + 1)
sieve[0] = sieve[1] = False
primes = []
for p in range(2, int(n**0.5) + 1):
if sieve[p]:
for i in range(p * p, n + 1, p):
sieve[i] = False
for p in range(2, n + 1):
if sieve[p]:
prime... | 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
def find_primes(n):
sieve = [True] * (n + 1)
sieve[0] = sieve[1] = False
primes = []
for p in range(2, int(n**0.5) + 1):
if sieve[p]:
for i in range(p * p, n + 1, p):
sieve[i] = False
for p in range(2, n + 1):
if sieve[p]:
... | 0 | |
572 | A | Arrays | PROGRAMMING | 900 | [
"sortings"
] | null | null | You are given two arrays *A* and *B* consisting of integers, sorted in non-decreasing order. Check whether it is possible to choose *k* numbers in array *A* and choose *m* numbers in array *B* so that any number chosen in the first array is strictly less than any number chosen in the second array. | The first line contains two integers *n**A*,<=*n**B* (1<=≤<=*n**A*,<=*n**B*<=≤<=105), separated by a space — the sizes of arrays *A* and *B*, correspondingly.
The second line contains two integers *k* and *m* (1<=≤<=*k*<=≤<=*n**A*,<=1<=≤<=*m*<=≤<=*n**B*), separated by a space.
The third line contains *n**A* numbers *... | Print "YES" (without the quotes), if you can choose *k* numbers in array *A* and *m* numbers in array *B* so that any number chosen in array *A* was strictly less than any number chosen in array *B*. Otherwise, print "NO" (without the quotes). | [
"3 3\n2 1\n1 2 3\n3 4 5\n",
"3 3\n3 3\n1 2 3\n3 4 5\n",
"5 2\n3 1\n1 1 1 1 1\n2 2\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | In the first sample test you can, for example, choose numbers 1 and 2 from array *A* and number 3 from array *B* (1 < 3 and 2 < 3).
In the second sample test the only way to choose *k* elements in the first array and *m* elements in the second one is to choose all numbers in both arrays, but then not all the num... | 500 | [
{
"input": "3 3\n2 1\n1 2 3\n3 4 5",
"output": "YES"
},
{
"input": "3 3\n3 3\n1 2 3\n3 4 5",
"output": "NO"
},
{
"input": "5 2\n3 1\n1 1 1 1 1\n2 2",
"output": "YES"
},
{
"input": "3 5\n1 1\n5 5 5\n5 5 5 5 5",
"output": "NO"
},
{
"input": "1 1\n1 1\n1\n1",
"ou... | 1,533,483,264 | 2,147,483,647 | Python 3 | OK | TESTS | 52 | 171 | 10,547,200 | lenA, lenB = map(int, input().split())
k, m = map(int, input().split())
arrA = list(map(int, input().split()))
arrB = list(map(int, input().split()))
if(arrB[lenB - m] > arrA[k - 1]):
print("YES")
else:
print("NO") | Title: Arrays
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given two arrays *A* and *B* consisting of integers, sorted in non-decreasing order. Check whether it is possible to choose *k* numbers in array *A* and choose *m* numbers in array *B* so that any number chosen in the fi... | ```python
lenA, lenB = map(int, input().split())
k, m = map(int, input().split())
arrA = list(map(int, input().split()))
arrB = list(map(int, input().split()))
if(arrB[lenB - m] > arrA[k - 1]):
print("YES")
else:
print("NO")
``` | 3 | |
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... | 1,696,574,889 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | n,h=map(int,input().split())
arr=list(map(int,input().split()))
summ=0
for i in range(n):
if arr[i]<=h:
sum+=1
else:
sum+=2
print(summ)
| 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,h=map(int,input().split())
arr=list(map(int,input().split()))
summ=0
for i in range(n):
if arr[i]<=h:
sum+=1
else:
sum+=2
print(summ)
``` | -1 | |
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"... | 1,696,696,177 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 20 | 62 | 0 | n,m,a=map(int,input().split())
hor=-(-n//a)
ver=-(-m//a)
total=hor*ver
print(total) | 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
n,m,a=map(int,input().split())
hor=-(-n//a)
ver=-(-m//a)
total=hor*ver
print(total)
``` | 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... | 1,586,350,975 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 18 | 109 | 0 | import sys
string = sys.stdin.read()
counts = dict()
for char in string:
if char not in counts:
counts[char] = 1
else:
counts[char] += 1
n = (counts["n"]-1)/2
e = (counts["e"])/3
i = (counts["i"])
t = (counts["t"])
print( int(min(n,e,i,t)) )
| 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
import sys
string = sys.stdin.read()
counts = dict()
for char in string:
if char not in counts:
counts[char] = 1
else:
counts[char] += 1
n = (counts["n"]-1)/2
e = (counts["e"])/3
i = (counts["i"])
t = (counts["t"])
print( int(min(n,e,i,t)) )
``` | -1 | |
289 | B | Polo the Penguin and Matrix | PROGRAMMING | 1,400 | [
"brute force",
"dp",
"implementation",
"sortings",
"ternary search"
] | null | null | Little penguin Polo has an *n*<=×<=*m* matrix, consisting of integers. Let's index the matrix rows from 1 to *n* from top to bottom and let's index the columns from 1 to *m* from left to right. Let's represent the matrix element on the intersection of row *i* and column *j* as *a**ij*.
In one move the penguin can add ... | The first line contains three integers *n*, *m* and *d* (1<=≤<=*n*,<=*m*<=≤<=100,<=1<=≤<=*d*<=≤<=104) — the matrix sizes and the *d* parameter. Next *n* lines contain the matrix: the *j*-th integer in the *i*-th row is the matrix element *a**ij* (1<=≤<=*a**ij*<=≤<=104). | In a single line print a single integer — the minimum number of moves the penguin needs to make all matrix elements equal. If that is impossible, print "-1" (without the quotes). | [
"2 2 2\n2 4\n6 8\n",
"1 2 7\n6 7\n"
] | [
"4\n",
"-1\n"
] | none | 1,000 | [
{
"input": "2 2 2\n2 4\n6 8",
"output": "4"
},
{
"input": "1 2 7\n6 7",
"output": "-1"
},
{
"input": "3 2 1\n5 7\n1 2\n5 100",
"output": "104"
},
{
"input": "3 3 3\n5 8 5\n11 11 17\n14 5 2",
"output": "12"
},
{
"input": "3 3 3\n5 8 5\n11 11 17\n14 5 3",
"outpu... | 1,584,257,567 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 216 | 307,200 | # maa chudaaye duniya
from bisect import bisect_right
n, m, d = map(int, input().split())
arr = []
for i in range(n):
arr.append(list(map(int, input().split())))
z = arr[0][0]
md = z % d
t = True
meh = []
for i in arr:
for j in i:
meh.append(j)
if j%d != md:
t = False
... | Title: Polo the Penguin and Matrix
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little penguin Polo has an *n*<=×<=*m* matrix, consisting of integers. Let's index the matrix rows from 1 to *n* from top to bottom and let's index the columns from 1 to *m* from left to right. Let's represe... | ```python
# maa chudaaye duniya
from bisect import bisect_right
n, m, d = map(int, input().split())
arr = []
for i in range(n):
arr.append(list(map(int, input().split())))
z = arr[0][0]
md = z % d
t = True
meh = []
for i in arr:
for j in i:
meh.append(j)
if j%d != md:
t... | 0 | |
614 | B | Gena's Code | PROGRAMMING | 1,400 | [
"implementation",
"math"
] | null | null | It's the year 4527 and the tanks game that we all know and love still exists. There also exists Great Gena's code, written in 2016. The problem this code solves is: given the number of tanks that go into the battle from each country, find their product. If it is turns to be too large, then the servers might have not en... | The first line of the input contains the number of countries *n* (1<=≤<=*n*<=≤<=100<=000). The second line contains *n* non-negative integers *a**i* without leading zeroes — the number of tanks of the *i*-th country.
It is guaranteed that the second line contains at least *n*<=-<=1 beautiful numbers and the total leng... | Print a single number without leading zeroes — the product of the number of tanks presented by each country. | [
"3\n5 10 1\n",
"4\n1 1 10 11\n",
"5\n0 3 1 100 1\n"
] | [
"50",
"110",
"0"
] | In sample 1 numbers 10 and 1 are beautiful, number 5 is not not.
In sample 2 number 11 is not beautiful (contains two '1's), all others are beautiful.
In sample 3 number 3 is not beautiful, all others are beautiful. | 1,000 | [
{
"input": "3\n5 10 1",
"output": "50"
},
{
"input": "4\n1 1 10 11",
"output": "110"
},
{
"input": "5\n0 3 1 100 1",
"output": "0"
},
{
"input": "40\n10 100 10 1 10 10 100 10 10 100 10 100 100 10 1824868942 100 100 1 10 100 100 10 100 100 10 100 10 1 10 100 100 100 10 1 10 1 ... | 1,631,479,687 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 5 | 46 | 6,963,200 | import math
n = int(input())
p = "1"
l = list(map(str, input().split()))
no = -1
for i in l:
if i == "0":
print("0")
exit(0)
elif i == "1":
continue
elif int(i) % 10 == 0:
p += i[1:]
else:
no = int(i)
if no == -1:
print(p)
else:
print(int(p) * no) | Title: Gena's Code
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
It's the year 4527 and the tanks game that we all know and love still exists. There also exists Great Gena's code, written in 2016. The problem this code solves is: given the number of tanks that go into the battle from eac... | ```python
import math
n = int(input())
p = "1"
l = list(map(str, input().split()))
no = -1
for i in l:
if i == "0":
print("0")
exit(0)
elif i == "1":
continue
elif int(i) % 10 == 0:
p += i[1:]
else:
no = int(i)
if no == -1:
print(p)
else:
print(int(p) * no)
``` | 0 | |
469 | A | I Wanna Be the Guy | PROGRAMMING | 800 | [
"greedy",
"implementation"
] | null | null | There is a game called "I Wanna Be the Guy", consisting of *n* levels. Little X and his friend Little Y are addicted to the game. Each of them wants to pass the whole game.
Little X can pass only *p* levels of the game. And Little Y can pass only *q* levels of the game. You are given the indices of levels Little X can... | The first line contains a single integer *n* (1<=≤<=<=*n*<=≤<=100).
The next line contains an integer *p* (0<=≤<=*p*<=≤<=*n*) at first, then follows *p* distinct integers *a*1,<=*a*2,<=...,<=*a**p* (1<=≤<=*a**i*<=≤<=*n*). These integers denote the indices of levels Little X can pass. The next line contains the levels... | If they can pass all the levels, print "I become the guy.". If it's impossible, print "Oh, my keyboard!" (without the quotes). | [
"4\n3 1 2 3\n2 2 4\n",
"4\n3 1 2 3\n2 2 3\n"
] | [
"I become the guy.\n",
"Oh, my keyboard!\n"
] | In the first sample, Little X can pass levels [1 2 3], and Little Y can pass level [2 4], so they can pass all the levels both.
In the second sample, no one can pass level 4. | 500 | [
{
"input": "4\n3 1 2 3\n2 2 4",
"output": "I become the guy."
},
{
"input": "4\n3 1 2 3\n2 2 3",
"output": "Oh, my keyboard!"
},
{
"input": "10\n5 8 6 1 5 4\n6 1 3 2 9 4 6",
"output": "Oh, my keyboard!"
},
{
"input": "10\n8 8 10 7 3 1 4 2 6\n8 9 5 10 3 7 2 4 8",
"output":... | 1,696,132,607 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | n=int(input())
a=set(map(int,input().split()))
b=set(map(int,input().split()))
c=a.union(b)
d=list(c)
d.remove(0)
if len(d)==n:
print('I become the guy.')
else:
print('Oh, my keyboard!') | Title: I Wanna Be the Guy
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There is a game called "I Wanna Be the Guy", consisting of *n* levels. Little X and his friend Little Y are addicted to the game. Each of them wants to pass the whole game.
Little X can pass only *p* levels of the g... | ```python
n=int(input())
a=set(map(int,input().split()))
b=set(map(int,input().split()))
c=a.union(b)
d=list(c)
d.remove(0)
if len(d)==n:
print('I become the guy.')
else:
print('Oh, my keyboard!')
``` | -1 | |
9 | A | Die Roll | PROGRAMMING | 800 | [
"math",
"probabilities"
] | A. Die Roll | 1 | 64 | Yakko, Wakko and Dot, world-famous animaniacs, decided to rest from acting in cartoons, and take a leave to travel a bit. Yakko dreamt to go to Pennsylvania, his Motherland and the Motherland of his ancestors. Wakko thought about Tasmania, its beaches, sun and sea. Dot chose Transylvania as the most mysterious and unpr... | The only line of the input file contains two natural numbers Y and W — the results of Yakko's and Wakko's die rolls. | Output the required probability in the form of irreducible fraction in format «A/B», where A — the numerator, and B — the denominator. If the required probability equals to zero, output «0/1». If the required probability equals to 1, output «1/1». | [
"4 2\n"
] | [
"1/2\n"
] | Dot will go to Transylvania, if she is lucky to roll 4, 5 or 6 points. | 0 | [
{
"input": "4 2",
"output": "1/2"
},
{
"input": "1 1",
"output": "1/1"
},
{
"input": "1 2",
"output": "5/6"
},
{
"input": "1 3",
"output": "2/3"
},
{
"input": "1 4",
"output": "1/2"
},
{
"input": "1 5",
"output": "1/3"
},
{
"input": "1 6",
... | 1,667,287,236 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 36 | 498 | 15,769,600 | from unittest import result
first_line = input().split()
y , w = first_line
maximum = max(y,w)
result = int(maximum)-1
probability = ["1/1","5/6","2/3","1/2","1/3","1/6"]
print(probability[int(result)]) | Title: Die Roll
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
Yakko, Wakko and Dot, world-famous animaniacs, decided to rest from acting in cartoons, and take a leave to travel a bit. Yakko dreamt to go to Pennsylvania, his Motherland and the Motherland of his ancestors. Wakko thought about T... | ```python
from unittest import result
first_line = input().split()
y , w = first_line
maximum = max(y,w)
result = int(maximum)-1
probability = ["1/1","5/6","2/3","1/2","1/3","1/6"]
print(probability[int(result)])
``` | 3.633507 |
108 | A | Palindromic Times | PROGRAMMING | 1,000 | [
"implementation",
"strings"
] | A. Palindromic Times | 2 | 256 | Tattah is asleep if and only if Tattah is attending a lecture. This is a well-known formula among Tattah's colleagues.
On a Wednesday afternoon, Tattah was attending Professor HH's lecture. At 12:21, right before falling asleep, he was staring at the digital watch around Saher's wrist. He noticed that the digits on th... | The first and only line of the input starts with a string with the format "HH:MM" where "HH" is from "00" to "23" and "MM" is from "00" to "59". Both "HH" and "MM" have exactly two digits. | Print the palindromic time of day that comes soonest after the time given in the input. If the input time is palindromic, output the soonest palindromic time after the input time. | [
"12:21\n",
"23:59\n"
] | [
"13:31\n",
"00:00\n"
] | none | 500 | [
{
"input": "12:21",
"output": "13:31"
},
{
"input": "23:59",
"output": "00:00"
},
{
"input": "15:51",
"output": "20:02"
},
{
"input": "10:44",
"output": "11:11"
},
{
"input": "04:02",
"output": "04:40"
},
{
"input": "02:11",
"output": "02:20"
},
... | 1,667,038,939 | 2,147,483,647 | PyPy 3-64 | RUNTIME_ERROR | TESTS | 0 | 154 | 2,764,800 | n,m,k,l = map(int,input().split())
ans=1
while ans*m-k<l:
ans+=1
if ans*m<n:
print(ans)
else:
print(-1) | Title: Palindromic Times
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Tattah is asleep if and only if Tattah is attending a lecture. This is a well-known formula among Tattah's colleagues.
On a Wednesday afternoon, Tattah was attending Professor HH's lecture. At 12:21, right before falling... | ```python
n,m,k,l = map(int,input().split())
ans=1
while ans*m-k<l:
ans+=1
if ans*m<n:
print(ans)
else:
print(-1)
``` | -1 |
258 | A | Little Elephant and Bits | PROGRAMMING | 1,100 | [
"greedy",
"math"
] | null | null | The Little Elephant has an integer *a*, written in the binary notation. He wants to write this number on a piece of paper.
To make sure that the number *a* fits on the piece of paper, the Little Elephant ought to delete exactly one any digit from number *a* in the binary record. At that a new number appears. It consis... | The single line contains integer *a*, written in the binary notation without leading zeroes. This number contains more than 1 and at most 105 digits. | In the single line print the number that is written without leading zeroes in the binary notation — the answer to the problem. | [
"101\n",
"110010\n"
] | [
"11\n",
"11010\n"
] | In the first sample the best strategy is to delete the second digit. That results in number 11<sub class="lower-index">2</sub> = 3<sub class="lower-index">10</sub>.
In the second sample the best strategy is to delete the third or fourth digits — that results in number 11010<sub class="lower-index">2</sub> = 26<sub cla... | 500 | [
{
"input": "101",
"output": "11"
},
{
"input": "110010",
"output": "11010"
},
{
"input": "10000",
"output": "1000"
},
{
"input": "1111111110",
"output": "111111111"
},
{
"input": "10100101011110101",
"output": "1100101011110101"
},
{
"input": "11101001... | 1,677,660,896 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 9 | 62 | 0 | x = input()
a = x.find('0')
if a == -1:
print(x)
else:
print(x[:a]+x[a+1:])
| Title: Little Elephant and Bits
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Little Elephant has an integer *a*, written in the binary notation. He wants to write this number on a piece of paper.
To make sure that the number *a* fits on the piece of paper, the Little Elephant ought... | ```python
x = input()
a = x.find('0')
if a == -1:
print(x)
else:
print(x[:a]+x[a+1:])
``` | 0 | |
960 | A | Check the string | PROGRAMMING | 1,200 | [
"implementation"
] | null | null | A has a string consisting of some number of lowercase English letters 'a'. He gives it to his friend B who appends some number of letters 'b' to the end of this string. Since both A and B like the characters 'a' and 'b', they have made sure that at this point, at least one 'a' and one 'b' exist in the string.
B now gi... | The first and only line consists of a string $S$ ($ 1 \le |S| \le 5\,000 $). It is guaranteed that the string will only consist of the lowercase English letters 'a', 'b', 'c'. | Print "YES" or "NO", according to the condition. | [
"aaabccc\n",
"bbacc\n",
"aabc\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | Consider first example: the number of 'c' is equal to the number of 'a'.
Consider second example: although the number of 'c' is equal to the number of the 'b', the order is not correct.
Consider third example: the number of 'c' is equal to the number of 'b'. | 500 | [
{
"input": "aaabccc",
"output": "YES"
},
{
"input": "bbacc",
"output": "NO"
},
{
"input": "aabc",
"output": "YES"
},
{
"input": "aabbcc",
"output": "YES"
},
{
"input": "aaacccbb",
"output": "NO"
},
{
"input": "abc",
"output": "YES"
},
{
"in... | 1,535,362,911 | 1,911 | Python 3 | WRONG_ANSWER | TESTS | 47 | 124 | 0 | a=input()
s=[0]*3
for i in range(len(a)):
if a[i]=='a':
s[0]+=1
elif a[i]=='b':
s[1]+=1
elif a[i]=='c':
s[2]+=1
af=a.find('a')
bf=a.find('b')
cf=a.find('c')
a=a[::-1]
ae=a.find('a')
be=a.find('b')
ce=a.find('c')
if af<bf and af<cf and bf<cf and be<ae and ce<be and ce<... | Title: Check the string
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A has a string consisting of some number of lowercase English letters 'a'. He gives it to his friend B who appends some number of letters 'b' to the end of this string. Since both A and B like the characters 'a' and 'b... | ```python
a=input()
s=[0]*3
for i in range(len(a)):
if a[i]=='a':
s[0]+=1
elif a[i]=='b':
s[1]+=1
elif a[i]=='c':
s[2]+=1
af=a.find('a')
bf=a.find('b')
cf=a.find('c')
a=a[::-1]
ae=a.find('a')
be=a.find('b')
ce=a.find('c')
if af<bf and af<cf and bf<cf and be<ae and ce<... | 0 | |
630 | A | Again Twenty Five! | PROGRAMMING | 800 | [
"number theory"
] | null | null | The HR manager was disappointed again. The last applicant failed the interview the same way as 24 previous ones. "Do I give such a hard task?" — the HR manager thought. "Just raise number 5 to the power of *n* and get last two digits of the number. Yes, of course, *n* can be rather big, and one cannot find the power us... | The only line of the input contains a single integer *n* (2<=≤<=*n*<=≤<=2·1018) — the power in which you need to raise number 5. | Output the last two digits of 5*n* without spaces between them. | [
"2\n"
] | [
"25"
] | none | 0 | [
{
"input": "2",
"output": "25"
},
{
"input": "7",
"output": "25"
},
{
"input": "1000000000000000000",
"output": "25"
},
{
"input": "2000000000000000000",
"output": "25"
},
{
"input": "987654321012345678",
"output": "25"
}
] | 1,689,862,544 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 2 | 500 | 5,222,400 | n = int(input())
Powered = 5 ** n
last2 = Powered % 100
print(last2)
| Title: Again Twenty Five!
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The HR manager was disappointed again. The last applicant failed the interview the same way as 24 previous ones. "Do I give such a hard task?" — the HR manager thought. "Just raise number 5 to the power of *n* and ge... | ```python
n = int(input())
Powered = 5 ** n
last2 = Powered % 100
print(last2)
``` | 0 | |
603 | A | Alternative Thinking | PROGRAMMING | 1,600 | [
"dp",
"greedy",
"math"
] | null | null | Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary string of length *n*. Each character of Kevin's string represents Kevin's score on one of the *n* questions of the olympiad—'1' for a correctly identified cow and '0' otherwise.
However, all is... | The first line contains the number of questions on the olympiad *n* (1<=≤<=*n*<=≤<=100<=000).
The following line contains a binary string of length *n* representing Kevin's results on the USAICO. | Output a single integer, the length of the longest possible alternating subsequence that Kevin can create in his string after flipping a single substring. | [
"8\n10000011\n",
"2\n01\n"
] | [
"5\n",
"2\n"
] | In the first sample, Kevin can flip the bolded substring '10000011' and turn his string into '10011011', which has an alternating subsequence of length 5: '10011011'.
In the second sample, Kevin can flip the entire string and still have the same score. | 500 | [
{
"input": "8\n10000011",
"output": "5"
},
{
"input": "2\n01",
"output": "2"
},
{
"input": "5\n10101",
"output": "5"
},
{
"input": "75\n010101010101010101010101010101010101010101010101010101010101010101010101010",
"output": "75"
},
{
"input": "11\n00000000000",
... | 1,454,240,424 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 5 | 62 | 0 | x=int(input())
p=input()
start=0
end=0
p+='2'
flag=False
ans=1
for i in range(1,x+1):
if p[i]!=p[i-1]:
ans+=1
start=end+1
end=i-1
if end-start>=2:
flag=True
print(ans+flag*2-1)
| Title: Alternative Thinking
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary string of length *n*. Each character of Kevin's string represents Kevin's score on one o... | ```python
x=int(input())
p=input()
start=0
end=0
p+='2'
flag=False
ans=1
for i in range(1,x+1):
if p[i]!=p[i-1]:
ans+=1
start=end+1
end=i-1
if end-start>=2:
flag=True
print(ans+flag*2-1)
``` | 0 | |
704 | A | Thor | PROGRAMMING | 1,600 | [
"brute force",
"data structures",
"implementation"
] | null | null | Thor is getting used to the Earth. As a gift Loki gave him a smartphone. There are *n* applications on this phone. Thor is fascinated by this phone. He has only one minor issue: he can't count the number of unread notifications generated by those applications (maybe Loki put a curse on it so he can't).
*q* events are ... | The first line of input contains two integers *n* and *q* (1<=≤<=*n*,<=*q*<=≤<=300<=000) — the number of applications and the number of events to happen.
The next *q* lines contain the events. The *i*-th of these lines starts with an integer *type**i* — type of the *i*-th event. If *type**i*<==<=1 or *type**i*<==<=2 t... | Print the number of unread notifications after each event. | [
"3 4\n1 3\n1 1\n1 2\n2 3\n",
"4 6\n1 2\n1 4\n1 2\n3 3\n1 3\n1 3\n"
] | [
"1\n2\n3\n2\n",
"1\n2\n3\n0\n1\n2\n"
] | In the first sample:
1. Application 3 generates a notification (there is 1 unread notification). 1. Application 1 generates a notification (there are 2 unread notifications). 1. Application 2 generates a notification (there are 3 unread notifications). 1. Thor reads the notification generated by application 3, the... | 500 | [
{
"input": "3 4\n1 3\n1 1\n1 2\n2 3",
"output": "1\n2\n3\n2"
},
{
"input": "4 6\n1 2\n1 4\n1 2\n3 3\n1 3\n1 3",
"output": "1\n2\n3\n0\n1\n2"
},
{
"input": "10 85\n2 2\n1 10\n1 1\n2 6\n1 2\n1 4\n1 7\n2 1\n1 1\n3 3\n1 9\n1 6\n1 8\n1 10\n3 8\n2 8\n1 6\n1 3\n1 9\n1 6\n1 3\n1 8\n1 1\n1 6\n1 1... | 1,689,590,609 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 31 | 0 | n, q = map(int, input().split())
counter = 0
app_array_duplicate = [0] * (n + 1)
app_array = [0] * (n + 1)
list_of_apps = []
for _ in range(q):
event_name, val = map(int, input().split())
if event_name == 1:
app_array_duplicate[val] += 1
app_array[val] += 1
counter += 1
... | Title: Thor
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Thor is getting used to the Earth. As a gift Loki gave him a smartphone. There are *n* applications on this phone. Thor is fascinated by this phone. He has only one minor issue: he can't count the number of unread notifications ge... | ```python
n, q = map(int, input().split())
counter = 0
app_array_duplicate = [0] * (n + 1)
app_array = [0] * (n + 1)
list_of_apps = []
for _ in range(q):
event_name, val = map(int, input().split())
if event_name == 1:
app_array_duplicate[val] += 1
app_array[val] += 1
counte... | 0 | |
721 | A | One-dimensional Japanese Crossword | PROGRAMMING | 800 | [
"implementation"
] | null | null | Recently Adaltik discovered japanese crosswords. Japanese crossword is a picture, represented as a table sized *a*<=×<=*b* squares, and each square is colored white or black. There are integers to the left of the rows and to the top of the columns, encrypting the corresponding row or column. The number of integers repr... | The first line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=100) — the length of the row. The second line of the input contains a single string consisting of *n* characters 'B' or 'W', ('B' corresponds to black square, 'W' — to white square in the row that Adaltik drew). | The first line should contain a single integer *k* — the number of integers encrypting the row, e.g. the number of groups of black squares in the row.
The second line should contain *k* integers, encrypting the row, e.g. corresponding to sizes of groups of consecutive black squares in the order from left to right. | [
"3\nBBW\n",
"5\nBWBWB\n",
"4\nWWWW\n",
"4\nBBBB\n",
"13\nWBBBBWWBWBBBW\n"
] | [
"1\n2 ",
"3\n1 1 1 ",
"0\n",
"1\n4 ",
"3\n4 1 3 "
] | The last sample case correspond to the picture in the statement. | 500 | [
{
"input": "3\nBBW",
"output": "1\n2 "
},
{
"input": "5\nBWBWB",
"output": "3\n1 1 1 "
},
{
"input": "4\nWWWW",
"output": "0"
},
{
"input": "4\nBBBB",
"output": "1\n4 "
},
{
"input": "13\nWBBBBWWBWBBBW",
"output": "3\n4 1 3 "
},
{
"input": "1\nB",
... | 1,619,423,681 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 46 | 0 | length=input()
string=input()
B=''
Bs=[]
for char in string:
if char=='B':
B+=char
else:
Bs.append(BGroup)
B=''
Bs.append(BGroup)
BsNumber=0
BsLengths=''
for string in Bs:
if string!='':
BsNumber+=1
BsLengths+=str(len(string))+' '
print(BsNumber)
print(BsLengths... | Title: One-dimensional Japanese Crossword
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Recently Adaltik discovered japanese crosswords. Japanese crossword is a picture, represented as a table sized *a*<=×<=*b* squares, and each square is colored white or black. There are integers to the... | ```python
length=input()
string=input()
B=''
Bs=[]
for char in string:
if char=='B':
B+=char
else:
Bs.append(BGroup)
B=''
Bs.append(BGroup)
BsNumber=0
BsLengths=''
for string in Bs:
if string!='':
BsNumber+=1
BsLengths+=str(len(string))+' '
print(BsNumber)
print... | -1 | |
891 | A | Pride | PROGRAMMING | 1,500 | [
"brute force",
"dp",
"greedy",
"math",
"number theory"
] | null | null | You have an array *a* with length *n*, you can perform operations. Each operation is like this: choose two adjacent elements from *a*, say *x* and *y*, and replace one of them with *gcd*(*x*,<=*y*), where *gcd* denotes the [greatest common divisor](https://en.wikipedia.org/wiki/Greatest_common_divisor).
What is the mi... | The first line of the input contains one integer *n* (1<=≤<=*n*<=≤<=2000) — the number of elements in the array.
The second line contains *n* space separated integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=109) — the elements of the array. | Print -1, if it is impossible to turn all numbers to 1. Otherwise, print the minimum number of operations needed to make all numbers equal to 1. | [
"5\n2 2 3 4 6\n",
"4\n2 4 6 8\n",
"3\n2 6 9\n"
] | [
"5\n",
"-1\n",
"4\n"
] | In the first sample you can turn all numbers to 1 using the following 5 moves:
- [2, 2, 3, 4, 6]. - [2, 1, 3, 4, 6] - [2, 1, 3, 1, 6] - [2, 1, 1, 1, 6] - [1, 1, 1, 1, 6] - [1, 1, 1, 1, 1]
We can prove that in this case it is not possible to make all numbers one using less than 5 moves. | 500 | [
{
"input": "5\n2 2 3 4 6",
"output": "5"
},
{
"input": "4\n2 4 6 8",
"output": "-1"
},
{
"input": "3\n2 6 9",
"output": "4"
},
{
"input": "15\n10 10 10 10 10 10 21 21 21 21 21 21 21 21 21",
"output": "15"
},
{
"input": "12\n10 10 14 14 14 14 14 14 14 14 21 21",
... | 1,551,988,385 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 93 | 307,200 | import sys
cache = {}
def getMn(n):
try:
return cache[n]
except:
cache[n] = [1,n]
i = 2
while i<=n**0.5:
if n%i==0:
cache[n].append(i)
cache[n].append(n//i)
i+=1
cache[n].sort()
return cache... | Title: Pride
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You have an array *a* with length *n*, you can perform operations. Each operation is like this: choose two adjacent elements from *a*, say *x* and *y*, and replace one of them with *gcd*(*x*,<=*y*), where *gcd* denotes the [great... | ```python
import sys
cache = {}
def getMn(n):
try:
return cache[n]
except:
cache[n] = [1,n]
i = 2
while i<=n**0.5:
if n%i==0:
cache[n].append(i)
cache[n].append(n//i)
i+=1
cache[n].sort()
re... | 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... | 1,638,999,909 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 62 | 0 | in_list = list(map(int,input().split()));
m = in_list[0]
n = in_list[1]
if(m % 2 == 0):
print(m/2 * n)
elif(n%2 ==0):
print(m * n/2)
else:
print((m-1)/2*n+(n-1)/2 )
| 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
in_list = list(map(int,input().split()));
m = in_list[0]
n = in_list[1]
if(m % 2 == 0):
print(m/2 * n)
elif(n%2 ==0):
print(m * n/2)
else:
print((m-1)/2*n+(n-1)/2 )
``` | 0 |
236 | A | Boy or Girl | PROGRAMMING | 800 | [
"brute force",
"implementation",
"strings"
] | null | null | Those days, many boys use beautiful girls' photos as avatars in forums. So it is pretty hard to tell the gender of a user at the first glance. Last year, our hero went to a forum and had a nice chat with a beauty (he thought so). After that they talked very often and eventually they became a couple in the network.
Bu... | The first line contains a non-empty string, that contains only lowercase English letters — the user name. This string contains at most 100 letters. | If it is a female by our hero's method, print "CHAT WITH HER!" (without the quotes), otherwise, print "IGNORE HIM!" (without the quotes). | [
"wjmzbmr\n",
"xiaodao\n",
"sevenkplus\n"
] | [
"CHAT WITH HER!\n",
"IGNORE HIM!\n",
"CHAT WITH HER!\n"
] | For the first example. There are 6 distinct characters in "wjmzbmr". These characters are: "w", "j", "m", "z", "b", "r". So wjmzbmr is a female and you should print "CHAT WITH HER!". | 500 | [
{
"input": "wjmzbmr",
"output": "CHAT WITH HER!"
},
{
"input": "xiaodao",
"output": "IGNORE HIM!"
},
{
"input": "sevenkplus",
"output": "CHAT WITH HER!"
},
{
"input": "pezu",
"output": "CHAT WITH HER!"
},
{
"input": "wnemlgppy",
"output": "CHAT WITH HER!"
},... | 1,699,324,464 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 62 | 0 | s = len(set(list(input())))
if s%2==0:
print('chat with her!')
else:
print('ignore him')
| Title: Boy or Girl
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Those days, many boys use beautiful girls' photos as avatars in forums. So it is pretty hard to tell the gender of a user at the first glance. Last year, our hero went to a forum and had a nice chat with a beauty (he though... | ```python
s = len(set(list(input())))
if s%2==0:
print('chat with her!')
else:
print('ignore him')
``` | 0 | |
111 | A | Petya and Inequiations | PROGRAMMING | 1,400 | [
"greedy"
] | A. Petya and Inequiations | 2 | 256 | Little Petya loves inequations. Help him find *n* positive integers *a*1,<=*a*2,<=...,<=*a**n*, such that the following two conditions are satisfied:
- *a*12<=+<=*a*22<=+<=...<=+<=*a**n*2<=≥<=*x*- *a*1<=+<=*a*2<=+<=...<=+<=*a**n*<=≤<=*y* | The first line contains three space-separated integers *n*, *x* and *y* (1<=≤<=*n*<=≤<=105,<=1<=≤<=*x*<=≤<=1012,<=1<=≤<=*y*<=≤<=106).
Please do not use the %lld specificator to read or write 64-bit integers in С++. It is recommended to use cin, cout streams or the %I64d specificator. | Print *n* positive integers that satisfy the conditions, one integer per line. If such numbers do not exist, print a single number "-1". If there are several solutions, print any of them. | [
"5 15 15\n",
"2 3 2\n",
"1 99 11\n"
] | [
"4\n4\n1\n1\n2\n",
"-1\n",
"11\n"
] | none | 500 | [
{
"input": "5 15 15",
"output": "11\n1\n1\n1\n1"
},
{
"input": "2 3 2",
"output": "-1"
},
{
"input": "1 99 11",
"output": "11"
},
{
"input": "100000 810000099998 1000000",
"output": "900001\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n1\n... | 1,684,407,753 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 51 | 248 | 9,932,800 | n,x,y=map(int,input().split())
if(x<y or y<n):print(-1)
else:
l_sum=[]
for i in range(n-1):
l_sum.append(1)
l_sum.append(y-n+1)
if((n-1)+(y-n+1)*(y-n+1)>=x):
for i in l_sum:print(i,end=" ")
else :print(-1)
| Title: Petya and Inequiations
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Little Petya loves inequations. Help him find *n* positive integers *a*1,<=*a*2,<=...,<=*a**n*, such that the following two conditions are satisfied:
- *a*12<=+<=*a*22<=+<=...<=+<=*a**n*2<=≥<=*x*- *a*1<=+<=*a*2<=+<... | ```python
n,x,y=map(int,input().split())
if(x<y or y<n):print(-1)
else:
l_sum=[]
for i in range(n-1):
l_sum.append(1)
l_sum.append(y-n+1)
if((n-1)+(y-n+1)*(y-n+1)>=x):
for i in l_sum:print(i,end=" ")
else :print(-1)
``` | 0 |
599 | A | Patrick and Shopping | PROGRAMMING | 800 | [
"implementation"
] | null | null | Today Patrick waits for a visit from his friend Spongebob. To prepare for the visit, Patrick needs to buy some goodies in two stores located near his house. There is a *d*1 meter long road between his house and the first shop and a *d*2 meter long road between his house and the second shop. Also, there is a road of len... | The first line of the input contains three integers *d*1, *d*2, *d*3 (1<=≤<=*d*1,<=*d*2,<=*d*3<=≤<=108) — the lengths of the paths.
- *d*1 is the length of the path connecting Patrick's house and the first shop; - *d*2 is the length of the path connecting Patrick's house and the second shop; - *d*3 is the length o... | Print the minimum distance that Patrick will have to walk in order to visit both shops and return to his house. | [
"10 20 30\n",
"1 1 5\n"
] | [
"60\n",
"4\n"
] | The first sample is shown on the picture in the problem statement. One of the optimal routes is: house <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/70a0795f45d32287dba0eb83fc4a3f470c6e5537.png" style="max-width: 100.0%;max-height: 100.0%;"/> first shop <img align="middle" class="tex-form... | 500 | [
{
"input": "10 20 30",
"output": "60"
},
{
"input": "1 1 5",
"output": "4"
},
{
"input": "100 33 34",
"output": "134"
},
{
"input": "777 777 777",
"output": "2331"
},
{
"input": "2 2 8",
"output": "8"
},
{
"input": "12 34 56",
"output": "92"
},
... | 1,680,723,314 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 31 | 0 | m =[int(x) for x in input().split()]
d_1 = m[0]
d_2 = m[1]
d_3 = m[2]
if d_1 + d_2 >= d_3:
print(d_1 + d_2 + d_3)
else:
print((d_1 + d_2) * 2) | Title: Patrick and Shopping
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Today Patrick waits for a visit from his friend Spongebob. To prepare for the visit, Patrick needs to buy some goodies in two stores located near his house. There is a *d*1 meter long road between his house and the... | ```python
m =[int(x) for x in input().split()]
d_1 = m[0]
d_2 = m[1]
d_3 = m[2]
if d_1 + d_2 >= d_3:
print(d_1 + d_2 + d_3)
else:
print((d_1 + d_2) * 2)
``` | 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... | 1,658,416,977 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 30 | 0 | s_input = input().upper()
x = 0;
indices = []
for i in range(0, len(s_input)):
if (s_input[i]=='H' or s_input[i]=='E' or s_input[i]=='L' or s_input[i]=='O'):
indices.append(i)
for j in range(0, len(indices)-1):
flag = 1
if(indices[j]+1!=indices[j+1]):
flag = 0
break;
if(flag==0):
... | 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 = input().upper()
x = 0;
indices = []
for i in range(0, len(s_input)):
if (s_input[i]=='H' or s_input[i]=='E' or s_input[i]=='L' or s_input[i]=='O'):
indices.append(i)
for j in range(0, len(indices)-1):
flag = 1
if(indices[j]+1!=indices[j+1]):
flag = 0
break;
if(fla... | 0 |
911 | B | Two Cakes | PROGRAMMING | 1,200 | [
"binary search",
"brute force",
"implementation"
] | null | null | It's New Year's Eve soon, so Ivan decided it's high time he started setting the table. Ivan has bought two cakes and cut them into pieces: the first cake has been cut into *a* pieces, and the second one — into *b* pieces.
Ivan knows that there will be *n* people at the celebration (including himself), so Ivan has set ... | The first line contains three integers *n*, *a* and *b* (1<=≤<=*a*,<=*b*<=≤<=100, 2<=≤<=*n*<=≤<=*a*<=+<=*b*) — the number of plates, the number of pieces of the first cake, and the number of pieces of the second cake, respectively. | Print the maximum possible number *x* such that Ivan can distribute the cake in such a way that each plate will contain at least *x* pieces of cake. | [
"5 2 3\n",
"4 7 10\n"
] | [
"1\n",
"3\n"
] | In the first example there is only one way to distribute cakes to plates, all of them will have 1 cake on it.
In the second example you can have two plates with 3 and 4 pieces of the first cake and two plates both with 5 pieces of the second cake. Minimal number of pieces is 3. | 0 | [
{
"input": "5 2 3",
"output": "1"
},
{
"input": "4 7 10",
"output": "3"
},
{
"input": "100 100 100",
"output": "2"
},
{
"input": "10 100 3",
"output": "3"
},
{
"input": "2 9 29",
"output": "9"
},
{
"input": "4 6 10",
"output": "3"
},
{
"inp... | 1,667,140,249 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 31 | 0 | p,a,b = list(map(int,input().split()))
if p == a+b:
print(1)
elif p<a and p<b:
s = min(a,b)
print(s//2)
| Title: Two Cakes
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
It's New Year's Eve soon, so Ivan decided it's high time he started setting the table. Ivan has bought two cakes and cut them into pieces: the first cake has been cut into *a* pieces, and the second one — into *b* pieces.
Iv... | ```python
p,a,b = list(map(int,input().split()))
if p == a+b:
print(1)
elif p<a and p<b:
s = min(a,b)
print(s//2)
``` | 0 | |
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"
},
{
... | 1,674,117,420 | 2,147,483,647 | Python 3 | OK | TESTS | 49 | 93 | 0 | a=[int(a)for a in input().split()]
b=input()
k=0
for i in range(len(b)):
t=a[int(b[i])-1]
k+=t
print(k) | 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
a=[int(a)for a in input().split()]
b=input()
k=0
for i in range(len(b)):
t=a[int(b[i])-1]
k+=t
print(k)
``` | 3 | |
731 | A | Night at the Museum | PROGRAMMING | 800 | [
"implementation",
"strings"
] | null | null | Grigoriy, like the hero of one famous comedy film, found a job as a night security guard at the museum. At first night he received embosser and was to take stock of the whole exposition.
Embosser is a special devise that allows to "print" the text of a plastic tape. Text is printed sequentially, character by character... | The only line of input contains the name of some exhibit — the non-empty string consisting of no more than 100 characters. It's guaranteed that the string consists of only lowercase English letters. | Print one integer — the minimum number of rotations of the wheel, required to print the name given in the input. | [
"zeus\n",
"map\n",
"ares\n"
] | [
"18\n",
"35\n",
"34\n"
] | To print the string from the first sample it would be optimal to perform the following sequence of rotations:
1. from 'a' to 'z' (1 rotation counterclockwise), 1. from 'z' to 'e' (5 clockwise rotations), 1. from 'e' to 'u' (10 rotations counterclockwise), 1. from 'u' to 's' (2 counterclockwise rotations). | 500 | [
{
"input": "zeus",
"output": "18"
},
{
"input": "map",
"output": "35"
},
{
"input": "ares",
"output": "34"
},
{
"input": "l",
"output": "11"
},
{
"input": "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuv",
"... | 1,674,268,755 | 2,147,483,647 | Python 3 | OK | TESTS | 44 | 46 | 0 | s = input()
res = 0
sp = 'a'
for x in s:
h = abs(ord(x) - ord(sp))
if h <= 13:
res += h
else:
res += (26 - h)
sp = x
# for x in range(len(s)):
# h = 0
# if s[x]>sp:
# h += ord(sp) - ord('a') + 1
# h += ord('z') - ord(s[x])
# else:
# h += ord(s[x]) - ord('a') + 1
# ... | Title: Night at the Museum
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Grigoriy, like the hero of one famous comedy film, found a job as a night security guard at the museum. At first night he received embosser and was to take stock of the whole exposition.
Embosser is a special devis... | ```python
s = input()
res = 0
sp = 'a'
for x in s:
h = abs(ord(x) - ord(sp))
if h <= 13:
res += h
else:
res += (26 - h)
sp = x
# for x in range(len(s)):
# h = 0
# if s[x]>sp:
# h += ord(sp) - ord('a') + 1
# h += ord('z') - ord(s[x])
# else:
# h += ord(s[x]) - ord('a... | 3 | |
174 | A | Problem About Equation | PROGRAMMING | 1,100 | [
"math"
] | null | null | A group of *n* merry programmers celebrate Robert Floyd's birthday. Polucarpus has got an honourable task of pouring Ber-Cola to everybody. Pouring the same amount of Ber-Cola to everybody is really important. In other words, the drink's volume in each of the *n* mugs must be the same.
Polycarpus has already began the... | The first line contains a pair of integers *n*, *b* (2<=≤<=*n*<=≤<=100,<=1<=≤<=*b*<=≤<=100), where *n* is the total number of friends in the group and *b* is the current volume of drink in the bottle. The second line contains a sequence of integers *a*1,<=*a*2,<=...,<=*a**n* (0<=≤<=*a**i*<=≤<=100), where *a**i* is the ... | Print a single number "-1" (without the quotes), if there is no solution. Otherwise, print *n* float numbers *c*1,<=*c*2,<=...,<=*c**n*, where *c**i* is the volume of the drink to add in the *i*-th mug. Print the numbers with no less than 6 digits after the decimal point, print each *c**i* on a single line. Polycarpus ... | [
"5 50\n1 2 3 4 5\n",
"2 2\n1 100\n"
] | [
"12.000000\n11.000000\n10.000000\n9.000000\n8.000000\n",
"-1\n"
] | none | 500 | [
{
"input": "5 50\n1 2 3 4 5",
"output": "12.000000\n11.000000\n10.000000\n9.000000\n8.000000"
},
{
"input": "2 2\n1 100",
"output": "-1"
},
{
"input": "2 2\n1 1",
"output": "1.000000\n1.000000"
},
{
"input": "3 2\n1 2 1",
"output": "1.000000\n0.000000\n1.000000"
},
{
... | 1,679,305,282 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | Один конь.py | Title: Problem About Equation
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A group of *n* merry programmers celebrate Robert Floyd's birthday. Polucarpus has got an honourable task of pouring Ber-Cola to everybody. Pouring the same amount of Ber-Cola to everybody is really important. In... | ```python
Один конь.py
``` | -1 | |
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... | 1,691,657,179 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 60 | 0 | def min_tram(w, stops):
capacity = 0
current_passengers = 0
for i in range(n):
exiting_passengers, entering_passengers = stops[i]
current_passengers -= exiting_passengers
current_passengers += entering_passengers
capacity = max(capacity, current_passengers)
re... | 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
def min_tram(w, stops):
capacity = 0
current_passengers = 0
for i in range(n):
exiting_passengers, entering_passengers = stops[i]
current_passengers -= exiting_passengers
current_passengers += entering_passengers
capacity = max(capacity, current_passenger... | -1 | |
268 | B | Buttons | PROGRAMMING | 1,000 | [
"implementation",
"math"
] | null | null | Manao is trying to open a rather challenging lock. The lock has *n* buttons on it and to open it, you should press the buttons in a certain order to open the lock. When you push some button, it either stays pressed into the lock (that means that you've guessed correctly and pushed the button that goes next in the seque... | A single line contains integer *n* (1<=≤<=*n*<=≤<=2000) — the number of buttons the lock has. | In a single line print the number of times Manao has to push a button in the worst-case scenario. | [
"2\n",
"3\n"
] | [
"3\n",
"7\n"
] | Consider the first test sample. Manao can fail his first push and push the wrong button. In this case he will already be able to guess the right one with his second push. And his third push will push the second right button. Thus, in the worst-case scenario he will only need 3 pushes. | 1,000 | [
{
"input": "2",
"output": "3"
},
{
"input": "3",
"output": "7"
},
{
"input": "4",
"output": "14"
},
{
"input": "1",
"output": "1"
},
{
"input": "10",
"output": "175"
},
{
"input": "2000",
"output": "1333335000"
},
{
"input": "1747",
"ou... | 1,694,877,875 | 2,147,483,647 | Python 3 | OK | TESTS | 24 | 92 | 0 | import sys
import math
for line in sys.stdin:
numbers = [int(x) for x in line.strip().split()]
n= numbers[0]
print(int(((n**3)+(5*n))/6)) | Title: Buttons
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Manao is trying to open a rather challenging lock. The lock has *n* buttons on it and to open it, you should press the buttons in a certain order to open the lock. When you push some button, it either stays pressed into the loc... | ```python
import sys
import math
for line in sys.stdin:
numbers = [int(x) for x in line.strip().split()]
n= numbers[0]
print(int(((n**3)+(5*n))/6))
``` | 3 | |
638 | A | Home Numbers | PROGRAMMING | 1,100 | [
"*special",
"constructive algorithms",
"math"
] | null | null | The main street of Berland is a straight line with *n* houses built along it (*n* is an even number). The houses are located at both sides of the street. The houses with odd numbers are at one side of the street and are numbered from 1 to *n*<=-<=1 in the order from the beginning of the street to the end (in the pictur... | The first line of the input contains two integers, *n* and *a* (1<=≤<=*a*<=≤<=*n*<=≤<=100<=000) — the number of houses on the street and the number of the house that Vasya needs to reach, correspondingly. It is guaranteed that number *n* is even. | Print a single integer — the minimum time Vasya needs to get from the beginning of the street to house *a*. | [
"4 2\n",
"8 5\n"
] | [
"2\n",
"3\n"
] | In the first sample there are only four houses on the street, two houses at each side. House 2 will be the last at Vasya's right.
The second sample corresponds to picture with *n* = 8. House 5 is the one before last at Vasya's left. | 500 | [
{
"input": "4 2",
"output": "2"
},
{
"input": "8 5",
"output": "3"
},
{
"input": "2 1",
"output": "1"
},
{
"input": "2 2",
"output": "1"
},
{
"input": "10 1",
"output": "1"
},
{
"input": "10 10",
"output": "1"
},
{
"input": "100000 100000",... | 1,458,481,637 | 6,437 | Python 3 | OK | TESTS | 69 | 77 | 5,734,400 | import string
x = input()
y = x.split(' ')
n, a = list(map(lambda x: int(x), y))
s = 0
if a & 1 == 1:
s = (a + 1) / 2
else:
s = (n - a + 2) / 2
print(int(s)) | Title: Home Numbers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The main street of Berland is a straight line with *n* houses built along it (*n* is an even number). The houses are located at both sides of the street. The houses with odd numbers are at one side of the street and are nu... | ```python
import string
x = input()
y = x.split(' ')
n, a = list(map(lambda x: int(x), y))
s = 0
if a & 1 == 1:
s = (a + 1) / 2
else:
s = (n - a + 2) / 2
print(int(s))
``` | 3 | |
18 | A | Triangle | PROGRAMMING | 1,500 | [
"brute force",
"geometry"
] | A. Triangle | 2 | 64 | At a geometry lesson Bob learnt that a triangle is called right-angled if it is nondegenerate and one of its angles is right. Bob decided to draw such a triangle immediately: on a sheet of paper he drew three points with integer coordinates, and joined them with segments of straight lines, then he showed the triangle t... | The first input line contains 6 space-separated integers *x*1,<=*y*1,<=*x*2,<=*y*2,<=*x*3,<=*y*3 — coordinates of the triangle's vertices. All the coordinates are integer and don't exceed 100 in absolute value. It's guaranteed that the triangle is nondegenerate, i.e. its total area is not zero. | If the given triangle is right-angled, output RIGHT, if it is almost right-angled, output ALMOST, and if it is neither of these, output NEITHER. | [
"0 0 2 0 0 1\n",
"2 3 4 5 6 6\n",
"-1 0 2 0 0 1\n"
] | [
"RIGHT\n",
"NEITHER\n",
"ALMOST\n"
] | none | 0 | [
{
"input": "0 0 2 0 0 1",
"output": "RIGHT"
},
{
"input": "2 3 4 5 6 6",
"output": "NEITHER"
},
{
"input": "-1 0 2 0 0 1",
"output": "ALMOST"
},
{
"input": "27 74 85 23 100 99",
"output": "NEITHER"
},
{
"input": "-97 -19 17 62 30 -76",
"output": "NEITHER"
},... | 1,448,870,113 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 24 | 124 | 307,200 | def isRightAngled(x1,y1,x2,y2,x3,y3):
if x2 == x1 or x3 == x1 or x3 == x2:
if y2 == y1 or y3 == y1 or y3 == y2:
return True
slope1 = (y2-y1)/(x2-x1)
slope2 = (y3-y1)/(x3-x1)
slope3 = (y3-y2)/(x3-x2)
if slope1 * slope2 == -1 or slope2 * slope3 == -1 or slope2 * slope3 == -1:
return True
else:
re... | Title: Triangle
Time Limit: 2 seconds
Memory Limit: 64 megabytes
Problem Description:
At a geometry lesson Bob learnt that a triangle is called right-angled if it is nondegenerate and one of its angles is right. Bob decided to draw such a triangle immediately: on a sheet of paper he drew three points with integer co... | ```python
def isRightAngled(x1,y1,x2,y2,x3,y3):
if x2 == x1 or x3 == x1 or x3 == x2:
if y2 == y1 or y3 == y1 or y3 == y2:
return True
slope1 = (y2-y1)/(x2-x1)
slope2 = (y3-y1)/(x3-x1)
slope3 = (y3-y2)/(x3-x2)
if slope1 * slope2 == -1 or slope2 * slope3 == -1 or slope2 * slope3 == -1:
return True
e... | 0 |
508 | A | Pasha and Pixels | PROGRAMMING | 1,100 | [
"brute force"
] | null | null | Pasha loves his phone and also putting his hair up... But the hair is now irrelevant.
Pasha has installed a new game to his phone. The goal of the game is following. There is a rectangular field consisting of *n* row with *m* pixels in each row. Initially, all the pixels are colored white. In one move, Pasha can choos... | The first line of the input contains three integers *n*,<=*m*,<=*k* (1<=≤<=*n*,<=*m*<=≤<=1000, 1<=≤<=*k*<=≤<=105) — the number of rows, the number of columns and the number of moves that Pasha is going to perform.
The next *k* lines contain Pasha's moves in the order he makes them. Each line contains two integers *i*... | If Pasha loses, print the number of the move when the 2<=×<=2 square consisting of black pixels is formed.
If Pasha doesn't lose, that is, no 2<=×<=2 square consisting of black pixels is formed during the given *k* moves, print 0. | [
"2 2 4\n1 1\n1 2\n2 1\n2 2\n",
"2 3 6\n2 3\n2 2\n1 3\n2 2\n1 2\n1 1\n",
"5 3 7\n2 3\n1 2\n1 1\n4 1\n3 1\n5 3\n3 2\n"
] | [
"4\n",
"5\n",
"0\n"
] | none | 500 | [
{
"input": "2 2 4\n1 1\n1 2\n2 1\n2 2",
"output": "4"
},
{
"input": "2 3 6\n2 3\n2 2\n1 3\n2 2\n1 2\n1 1",
"output": "5"
},
{
"input": "5 3 7\n2 3\n1 2\n1 1\n4 1\n3 1\n5 3\n3 2",
"output": "0"
},
{
"input": "3 3 11\n2 1\n3 1\n1 1\n1 3\n1 2\n2 3\n3 3\n3 2\n2 2\n1 3\n3 3",
... | 1,697,801,543 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 4 | 2,000 | 8,601,600 | n,m,k=map(int,input().split())
whole=[]
for i in range(k):
a,b=map(int,input().split())
whole.append((a,b))
for i in range(k):
(a,b)=whole[i]
if (a,b-1) in whole[:i+1] and (a-1,b) in whole[:i+1] and (a-1,b-1) in whole[:i+1]:
print(i+1)
break
elif (a,b+1) in whole[:i+1] a... | Title: Pasha and Pixels
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Pasha loves his phone and also putting his hair up... But the hair is now irrelevant.
Pasha has installed a new game to his phone. The goal of the game is following. There is a rectangular field consisting of *n* row ... | ```python
n,m,k=map(int,input().split())
whole=[]
for i in range(k):
a,b=map(int,input().split())
whole.append((a,b))
for i in range(k):
(a,b)=whole[i]
if (a,b-1) in whole[:i+1] and (a-1,b) in whole[:i+1] and (a-1,b-1) in whole[:i+1]:
print(i+1)
break
elif (a,b+1) in who... | 0 | |
847 | G | University Classes | PROGRAMMING | 900 | [
"implementation"
] | null | null | There are *n* student groups at the university. During the study day, each group can take no more than 7 classes. Seven time slots numbered from 1 to 7 are allocated for the classes.
The schedule on Monday is known for each group, i. e. time slots when group will have classes are known.
Your task is to determine the ... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of groups.
Each of the following *n* lines contains a sequence consisting of 7 zeroes and ones — the schedule of classes on Monday for a group. If the symbol in a position equals to 1 then the group has class in the corresponding time slot... | Print minimum number of rooms needed to hold all groups classes on Monday. | [
"2\n0101010\n1010101\n",
"3\n0101011\n0011001\n0110111\n"
] | [
"1\n",
"3\n"
] | In the first example one room is enough. It will be occupied in each of the seven time slot by the first group or by the second group.
In the second example three rooms is enough, because in the seventh time slot all three groups have classes. | 0 | [
{
"input": "2\n0101010\n1010101",
"output": "1"
},
{
"input": "3\n0101011\n0011001\n0110111",
"output": "3"
},
{
"input": "1\n0111000",
"output": "1"
},
{
"input": "1\n0000000",
"output": "0"
},
{
"input": "1\n1111111",
"output": "1"
},
{
"input": "2\n... | 1,572,024,684 | 2,147,483,647 | Python 3 | OK | TESTS | 21 | 109 | 307,200 | n = int(input())
a = [input() for i in range(n)]
print(max(map(lambda x: x.count('1'), zip(*a)))) | Title: University Classes
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There are *n* student groups at the university. During the study day, each group can take no more than 7 classes. Seven time slots numbered from 1 to 7 are allocated for the classes.
The schedule on Monday is known ... | ```python
n = int(input())
a = [input() for i in range(n)]
print(max(map(lambda x: x.count('1'), zip(*a))))
``` | 3 | |
519 | A | A and B and Chess | PROGRAMMING | 900 | [
"implementation"
] | null | null | A and B are preparing themselves for programming contests.
To train their logical thinking and solve problems better, A and B decided to play chess. During the game A wondered whose position is now stronger.
For each chess piece we know its weight:
- the queen's weight is 9, - the rook's weight is 5, - the bisho... | The input contains eight lines, eight characters each — the board's description.
The white pieces on the board are marked with uppercase letters, the black pieces are marked with lowercase letters.
The white pieces are denoted as follows: the queen is represented is 'Q', the rook — as 'R', the bishop — as'B', the kni... | Print "White" (without quotes) if the weight of the position of the white pieces is more than the weight of the position of the black pieces, print "Black" if the weight of the black pieces is more than the weight of the white pieces and print "Draw" if the weights of the white and black pieces are equal. | [
"...QK...\n........\n........\n........\n........\n........\n........\n...rk...\n",
"rnbqkbnr\npppppppp\n........\n........\n........\n........\nPPPPPPPP\nRNBQKBNR\n",
"rppppppr\n...k....\n........\n........\n........\n........\nK...Q...\n........\n"
] | [
"White\n",
"Draw\n",
"Black\n"
] | In the first test sample the weight of the position of the white pieces equals to 9, the weight of the position of the black pieces equals 5.
In the second test sample the weights of the positions of the black and the white pieces are equal to 39.
In the third test sample the weight of the position of the white piece... | 500 | [
{
"input": "rnbqkbnr\npppppppp\n........\n........\n........\n........\nPPPPPPPP\nRNBQKBNR",
"output": "Draw"
},
{
"input": "....bQ.K\n.B......\n.....P..\n........\n........\n........\n...N.P..\n.....R..",
"output": "White"
},
{
"input": "b....p..\nR.......\n.pP...b.\npp......\nq.PPNpPR\... | 1,678,715,033 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 16 | 31 | 0 | a = []
black = 0
white = 0
queen = 9
rook = 5
bishop = 3
knight = 3
pawn = 1
for i in range(8):
a = input()
for j in a:
if j == 'Q':
white+=9
elif j == 'R':
white+=5
elif j == 'B':
white+=3
elif j == 'K':
white+=3
... | Title: A and B and Chess
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A and B are preparing themselves for programming contests.
To train their logical thinking and solve problems better, A and B decided to play chess. During the game A wondered whose position is now stronger.
For eac... | ```python
a = []
black = 0
white = 0
queen = 9
rook = 5
bishop = 3
knight = 3
pawn = 1
for i in range(8):
a = input()
for j in a:
if j == 'Q':
white+=9
elif j == 'R':
white+=5
elif j == 'B':
white+=3
elif j == 'K':
... | 0 | |
731 | A | Night at the Museum | PROGRAMMING | 800 | [
"implementation",
"strings"
] | null | null | Grigoriy, like the hero of one famous comedy film, found a job as a night security guard at the museum. At first night he received embosser and was to take stock of the whole exposition.
Embosser is a special devise that allows to "print" the text of a plastic tape. Text is printed sequentially, character by character... | The only line of input contains the name of some exhibit — the non-empty string consisting of no more than 100 characters. It's guaranteed that the string consists of only lowercase English letters. | Print one integer — the minimum number of rotations of the wheel, required to print the name given in the input. | [
"zeus\n",
"map\n",
"ares\n"
] | [
"18\n",
"35\n",
"34\n"
] | To print the string from the first sample it would be optimal to perform the following sequence of rotations:
1. from 'a' to 'z' (1 rotation counterclockwise), 1. from 'z' to 'e' (5 clockwise rotations), 1. from 'e' to 'u' (10 rotations counterclockwise), 1. from 'u' to 's' (2 counterclockwise rotations). | 500 | [
{
"input": "zeus",
"output": "18"
},
{
"input": "map",
"output": "35"
},
{
"input": "ares",
"output": "34"
},
{
"input": "l",
"output": "11"
},
{
"input": "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuv",
"... | 1,665,152,802 | 2,147,483,647 | Python 3 | OK | TESTS | 44 | 46 | 0 | a = 'abcdefghijklmnopqrstuvwxyz'
ans = 0
x = 0
for c in input():
y = (a.index(c) - x)%26
ans += min(y, 26-y)
x = a.index(c)
print(ans) | Title: Night at the Museum
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Grigoriy, like the hero of one famous comedy film, found a job as a night security guard at the museum. At first night he received embosser and was to take stock of the whole exposition.
Embosser is a special devis... | ```python
a = 'abcdefghijklmnopqrstuvwxyz'
ans = 0
x = 0
for c in input():
y = (a.index(c) - x)%26
ans += min(y, 26-y)
x = a.index(c)
print(ans)
``` | 3 | |
583 | A | Asphalting Roads | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | City X consists of *n* vertical and *n* horizontal infinite roads, forming *n*<=×<=*n* intersections. Roads (both vertical and horizontal) are numbered from 1 to *n*, and the intersections are indicated by the numbers of the roads that form them.
Sand roads have long been recognized out of date, so the decision was ma... | The first line contains integer *n* (1<=≤<=*n*<=≤<=50) — the number of vertical and horizontal roads in the city.
Next *n*2 lines contain the order of intersections in the schedule. The *i*-th of them contains two numbers *h**i*,<=*v**i* (1<=≤<=*h**i*,<=*v**i*<=≤<=*n*), separated by a space, and meaning that the inte... | In the single line print the numbers of the days when road works will be in progress in ascending order. The days are numbered starting from 1. | [
"2\n1 1\n1 2\n2 1\n2 2\n",
"1\n1 1\n"
] | [
"1 4 \n",
"1 \n"
] | In the sample the brigade acts like that:
1. On the first day the brigade comes to the intersection of the 1-st horizontal and the 1-st vertical road. As none of them has been asphalted, the workers asphalt the 1-st vertical and the 1-st horizontal road; 1. On the second day the brigade of the workers comes to the i... | 500 | [
{
"input": "2\n1 1\n1 2\n2 1\n2 2",
"output": "1 4 "
},
{
"input": "1\n1 1",
"output": "1 "
},
{
"input": "2\n1 1\n2 2\n1 2\n2 1",
"output": "1 2 "
},
{
"input": "2\n1 2\n2 2\n2 1\n1 1",
"output": "1 3 "
},
{
"input": "3\n2 2\n1 2\n3 2\n3 3\n1 1\n2 3\n1 3\n3 1\n2 ... | 1,664,693,247 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 31 | 0 | roads = int(input())
h = []
v = []
day = []
for i in range(1,roads**2+1):
a, b = list(input().split(" "))
if ((a not in h) and (b not in v)):
#print (a not in h)
#print (b not in v)
h.append(a)
v.append(b)
day.append(i)
#print(str(i) + " yes")
#el... | Title: Asphalting Roads
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
City X consists of *n* vertical and *n* horizontal infinite roads, forming *n*<=×<=*n* intersections. Roads (both vertical and horizontal) are numbered from 1 to *n*, and the intersections are indicated by the numbers ... | ```python
roads = int(input())
h = []
v = []
day = []
for i in range(1,roads**2+1):
a, b = list(input().split(" "))
if ((a not in h) and (b not in v)):
#print (a not in h)
#print (b not in v)
h.append(a)
v.append(b)
day.append(i)
#print(str(i) + " yes"... | 0 | |
653 | A | Bear and Three Balls | PROGRAMMING | 900 | [
"brute force",
"implementation",
"sortings"
] | null | null | Limak is a little polar bear. He has *n* balls, the *i*-th ball has size *t**i*.
Limak wants to give one ball to each of his three friends. Giving gifts isn't easy — there are two rules Limak must obey to make friends happy:
- No two friends can get balls of the same size. - No two friends can get balls of sizes th... | The first line of the input contains one integer *n* (3<=≤<=*n*<=≤<=50) — the number of balls Limak has.
The second line contains *n* integers *t*1,<=*t*2,<=...,<=*t**n* (1<=≤<=*t**i*<=≤<=1000) where *t**i* denotes the size of the *i*-th ball. | Print "YES" (without quotes) if Limak can choose three balls of distinct sizes, such that any two of them differ by no more than 2. Otherwise, print "NO" (without quotes). | [
"4\n18 55 16 17\n",
"6\n40 41 43 44 44 44\n",
"8\n5 972 3 4 1 4 970 971\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | In the first sample, there are 4 balls and Limak is able to choose three of them to satisfy the rules. He must must choose balls with sizes 18, 16 and 17.
In the second sample, there is no way to give gifts to three friends without breaking the rules.
In the third sample, there is even more than one way to choose bal... | 500 | [
{
"input": "4\n18 55 16 17",
"output": "YES"
},
{
"input": "6\n40 41 43 44 44 44",
"output": "NO"
},
{
"input": "8\n5 972 3 4 1 4 970 971",
"output": "YES"
},
{
"input": "3\n959 747 656",
"output": "NO"
},
{
"input": "4\n1 2 2 3",
"output": "YES"
},
{
... | 1,597,905,448 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 108 | 0 | n = int(input())
arr= [int(x) for x in input().split()]
s = list(set(arr))
s.sort()
f = 0
for i in range(len(s)-1):
if(arr[i+1]-arr[i]==1):
f+=1
if(f==2):
break
if(f==2):
print("YES")
else:
print("NO") | Title: Bear and Three Balls
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Limak is a little polar bear. He has *n* balls, the *i*-th ball has size *t**i*.
Limak wants to give one ball to each of his three friends. Giving gifts isn't easy — there are two rules Limak must obey to make fri... | ```python
n = int(input())
arr= [int(x) for x in input().split()]
s = list(set(arr))
s.sort()
f = 0
for i in range(len(s)-1):
if(arr[i+1]-arr[i]==1):
f+=1
if(f==2):
break
if(f==2):
print("YES")
else:
print("NO")
``` | 0 | |
445 | A | DZY Loves Chessboard | PROGRAMMING | 1,200 | [
"dfs and similar",
"implementation"
] | null | null | DZY loves chessboard, and he enjoys playing with it.
He has a chessboard of *n* rows and *m* columns. Some cells of the chessboard are bad, others are good. For every good cell, DZY wants to put a chessman on it. Each chessman is either white or black. After putting all chessmen, DZY wants that no two chessmen with th... | The first line contains two space-separated integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=100).
Each of the next *n* lines contains a string of *m* characters: the *j*-th character of the *i*-th string is either "." or "-". A "." means that the corresponding cell (in the *i*-th row and the *j*-th column) is good, while a ... | Output must contain *n* lines, each line must contain a string of *m* characters. The *j*-th character of the *i*-th string should be either "W", "B" or "-". Character "W" means the chessman on the cell is white, "B" means it is black, "-" means the cell is a bad cell.
If multiple answers exist, print any of them. It ... | [
"1 1\n.\n",
"2 2\n..\n..\n",
"3 3\n.-.\n---\n--."
] | [
"B\n",
"BW\nWB\n",
"B-B\n---\n--B"
] | In the first sample, DZY puts a single black chessman. Of course putting a white one is also OK.
In the second sample, all 4 cells are good. No two same chessmen share an edge in the sample output.
In the third sample, no good cells are adjacent. So you can just put 3 chessmen, no matter what their colors are. | 500 | [
{
"input": "1 1\n.",
"output": "B"
},
{
"input": "2 2\n..\n..",
"output": "BW\nWB"
},
{
"input": "3 3\n.-.\n---\n--.",
"output": "B-B\n---\n--B"
},
{
"input": "3 1\n-\n.\n.",
"output": "-\nW\nB"
},
{
"input": "11 11\n-----------\n-----------\n-----------\n--------... | 1,606,717,359 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 1 | 124 | 0 | # Problem Link: https://codeforces.com/problemset/problem/445/A
# Author: Raunak Sett
import sys
reader = (s.rstrip() for s in sys.stdin)
input = reader.__next__
# do magic here
n, m = map(int, input().split())
board = [input() for i in range(n)]
for i in range(n):
for j in range(m):
cell = ... | Title: DZY Loves Chessboard
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
DZY loves chessboard, and he enjoys playing with it.
He has a chessboard of *n* rows and *m* columns. Some cells of the chessboard are bad, others are good. For every good cell, DZY wants to put a chessman on it. ... | ```python
# Problem Link: https://codeforces.com/problemset/problem/445/A
# Author: Raunak Sett
import sys
reader = (s.rstrip() for s in sys.stdin)
input = reader.__next__
# do magic here
n, m = map(int, input().split())
board = [input() for i in range(n)]
for i in range(n):
for j in range(m):
... | 0 | |
0 | none | none | none | 0 | [
"none"
] | null | null | The main road in Bytecity is a straight line from south to north. Conveniently, there are coordinates measured in meters from the southernmost building in north direction.
At some points on the road there are *n* friends, and *i*-th of them is standing at the point *x**i* meters and can move with any speed no greater ... | The first line contains single integer *n* (2<=≤<=*n*<=≤<=60<=000) — the number of friends.
The second line contains *n* integers *x*1,<=*x*2,<=...,<=*x**n* (1<=≤<=*x**i*<=≤<=109) — the current coordinates of the friends, in meters.
The third line contains *n* integers *v*1,<=*v*2,<=...,<=*v**n* (1<=≤<=*v**i*<=≤<=109... | Print the minimum time (in seconds) needed for all the *n* friends to meet at some point on the road.
Your answer will be considered correct, if its absolute or relative error isn't greater than 10<=-<=6. Formally, let your answer be *a*, while jury's answer be *b*. Your answer will be considered correct if holds. | [
"3\n7 1 3\n1 2 1\n",
"4\n5 10 3 2\n2 3 2 4\n"
] | [
"2.000000000000\n",
"1.400000000000\n"
] | In the first sample, all friends can gather at the point 5 within 2 seconds. In order to achieve this, the first friend should go south all the time at his maximum speed, while the second and the third friends should go north at their maximum speeds. | 0 | [
{
"input": "3\n7 1 3\n1 2 1",
"output": "2.000000000000"
},
{
"input": "4\n5 10 3 2\n2 3 2 4",
"output": "1.400000000000"
},
{
"input": "3\n1 1000000000 2\n1 2 1000000000",
"output": "333333332.999999999971"
},
{
"input": "2\n4 5\n10 8",
"output": "0.055555555556"
},
... | 1,664,116,695 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 35 | 5,000 | 6,041,600 | n=int(input())
a=list(map(int, input().split()))
c=list(map(int, input().split()))
l=0
r=10**9
while r-l>0.0000001:
m1=l+(r-l)/3
m2=l+(r-l)/3*2
o1=abs(m1-a[0])/c[0]
o2=abs(m2-a[0])/c[0]
for i in range(n):
e1=abs(m1-a[i])/c[i]
e2=abs(m2-a[i])/c[i]
if e1>o1:
o1=e1
if e2>o2:
... | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The main road in Bytecity is a straight line from south to north. Conveniently, there are coordinates measured in meters from the southernmost building in north direction.
At some points on the road there are *n* friends, and *i*... | ```python
n=int(input())
a=list(map(int, input().split()))
c=list(map(int, input().split()))
l=0
r=10**9
while r-l>0.0000001:
m1=l+(r-l)/3
m2=l+(r-l)/3*2
o1=abs(m1-a[0])/c[0]
o2=abs(m2-a[0])/c[0]
for i in range(n):
e1=abs(m1-a[i])/c[i]
e2=abs(m2-a[i])/c[i]
if e1>o1:
o1=e1
... | 0 | |
34 | B | Sale | PROGRAMMING | 900 | [
"greedy",
"sortings"
] | B. Sale | 2 | 256 | Once Bob got to a sale of old TV sets. There were *n* TV sets at that sale. TV set with index *i* costs *a**i* bellars. Some TV sets have a negative price — their owners are ready to pay Bob if he buys their useless apparatus. Bob can «buy» any TV sets he wants. Though he's very strong, Bob can carry at most *m* TV set... | The first line contains two space-separated integers *n* and *m* (1<=≤<=*m*<=≤<=*n*<=≤<=100) — amount of TV sets at the sale, and amount of TV sets that Bob can carry. The following line contains *n* space-separated integers *a**i* (<=-<=1000<=≤<=*a**i*<=≤<=1000) — prices of the TV sets. | Output the only number — the maximum sum of money that Bob can earn, given that he can carry at most *m* TV sets. | [
"5 3\n-6 0 35 -2 4\n",
"4 2\n7 0 0 -7\n"
] | [
"8\n",
"7\n"
] | none | 1,000 | [
{
"input": "5 3\n-6 0 35 -2 4",
"output": "8"
},
{
"input": "4 2\n7 0 0 -7",
"output": "7"
},
{
"input": "6 6\n756 -611 251 -66 572 -818",
"output": "1495"
},
{
"input": "5 5\n976 437 937 788 518",
"output": "0"
},
{
"input": "5 3\n-2 -2 -2 -2 -2",
"output": "... | 1,590,585,355 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 186 | 307,200 | n , m = map(int,input("").split(" "))
lst_2 = []
ans = 0
lst_1 = list(map(int,input("").split(" ")))
if n==m:
for i in lst_1:
ans = ans+i
if ans < 0:
print(abs(ans))
else:
print(-ans)
else:
for j in lst_1:
if j <= 0:
lst_2.append(j)
lst_... | Title: Sale
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Once Bob got to a sale of old TV sets. There were *n* TV sets at that sale. TV set with index *i* costs *a**i* bellars. Some TV sets have a negative price — their owners are ready to pay Bob if he buys their useless apparatus. Bob can... | ```python
n , m = map(int,input("").split(" "))
lst_2 = []
ans = 0
lst_1 = list(map(int,input("").split(" ")))
if n==m:
for i in lst_1:
ans = ans+i
if ans < 0:
print(abs(ans))
else:
print(-ans)
else:
for j in lst_1:
if j <= 0:
lst_2.append(j)
... | 0 |
358 | A | Dima and Continuous Line | PROGRAMMING | 1,400 | [
"brute force",
"implementation"
] | null | null | Dima and Seryozha live in an ordinary dormitory room for two. One day Dima had a date with his girl and he asked Seryozha to leave the room. As a compensation, Seryozha made Dima do his homework.
The teacher gave Seryozha the coordinates of *n* distinct points on the abscissa axis and asked to consecutively connect th... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=103). The second line contains *n* distinct integers *x*1,<=*x*2,<=...,<=*x**n* (<=-<=106<=≤<=*x**i*<=≤<=106) — the *i*-th point has coordinates (*x**i*,<=0). The points are not necessarily sorted by their *x* coordinate. | In the single line print "yes" (without the quotes), if the line has self-intersections. Otherwise, print "no" (without the quotes). | [
"4\n0 10 5 15\n",
"4\n0 15 5 10\n"
] | [
"yes\n",
"no\n"
] | The first test from the statement is on the picture to the left, the second test is on the picture to the right. | 500 | [
{
"input": "4\n0 10 5 15",
"output": "yes"
},
{
"input": "4\n0 15 5 10",
"output": "no"
},
{
"input": "5\n0 1000 2000 3000 1500",
"output": "yes"
},
{
"input": "5\n-724093 710736 -383722 -359011 439613",
"output": "no"
},
{
"input": "50\n384672 661179 -775591 -989... | 1,382,715,721 | 721 | Python 3 | WRONG_ANSWER | TESTS | 12 | 62 | 307,200 | N = int(input())
Nums = list(map(int, input().split()))
if N == 1:
print("no")
else:
Min, Max = float("-inf"), float("inf")
Last = Nums[0]
Flag = False
for i in range(1, len(Nums)):
if Last > Nums[i]:
if Nums[i] < Min:
Flag = True
break
... | Title: Dima and Continuous Line
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Dima and Seryozha live in an ordinary dormitory room for two. One day Dima had a date with his girl and he asked Seryozha to leave the room. As a compensation, Seryozha made Dima do his homework.
The teacher g... | ```python
N = int(input())
Nums = list(map(int, input().split()))
if N == 1:
print("no")
else:
Min, Max = float("-inf"), float("inf")
Last = Nums[0]
Flag = False
for i in range(1, len(Nums)):
if Last > Nums[i]:
if Nums[i] < Min:
Flag = True
break
... | 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... | 1,608,297,151 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 218 | 0 | x=input()
c,b=0,0
for i in x:
if i.islower(): c+=1
else: b+=1
print(x.lower() if c>=b else x.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
x=input()
c,b=0,0
for i in x:
if i.islower(): c+=1
else: b+=1
print(x.lower() if c>=b else x.upper())
``` | 3.9455 |
798 | A | Mike and palindrome | PROGRAMMING | 1,000 | [
"brute force",
"constructive algorithms",
"strings"
] | null | null | Mike has a string *s* consisting of only lowercase English letters. He wants to change exactly one character from the string so that the resulting one is a palindrome.
A palindrome is a string that reads the same backward as forward, for example strings "z", "aaa", "aba", "abccba" are palindromes, but strings "codefo... | The first and single line contains string *s* (1<=≤<=|*s*|<=≤<=15). | Print "YES" (without quotes) if Mike can change exactly one character so that the resulting string is palindrome or "NO" (without quotes) otherwise. | [
"abccaa\n",
"abbcca\n",
"abcda\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | none | 500 | [
{
"input": "abccaa",
"output": "YES"
},
{
"input": "abbcca",
"output": "NO"
},
{
"input": "abcda",
"output": "YES"
},
{
"input": "kyw",
"output": "YES"
},
{
"input": "fccf",
"output": "NO"
},
{
"input": "mnlm",
"output": "YES"
},
{
"input":... | 1,636,990,269 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 31 | 0 | n=input()
count=0
x=true
for i in range(int(len(s)/2)):
if n[i]!=n[len(n)-i-1]:
count+=1
if count>1:
x=False
break
if len(s)%2==1 and count==0:
count+=1
if x and count==1:
print('Yes')
else:
print('No')
| Title: Mike and palindrome
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Mike has a string *s* consisting of only lowercase English letters. He wants to change exactly one character from the string so that the resulting one is a palindrome.
A palindrome is a string that reads the same ... | ```python
n=input()
count=0
x=true
for i in range(int(len(s)/2)):
if n[i]!=n[len(n)-i-1]:
count+=1
if count>1:
x=False
break
if len(s)%2==1 and count==0:
count+=1
if x and count==1:
print('Yes')
else:
print('No')
``` | -1 | |
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... | 1,475,315,430 | 2,147,483,647 | Python 3 | OK | TESTS | 50 | 124 | 0 | import sys
def main(sinp=sys.stdin, sout=sys.stdout):
ranks = sinp.readline()
years = [int(year) for year in sinp.readline().split()]
rank_a, rank_b = map(int, sinp.readline().split())
sout.write(str(sum(years[rank_a-1:rank_b-1])))
if __name__ == '__main__':
main()
| 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
import sys
def main(sinp=sys.stdin, sout=sys.stdout):
ranks = sinp.readline()
years = [int(year) for year in sinp.readline().split()]
rank_a, rank_b = map(int, sinp.readline().split())
sout.write(str(sum(years[rank_a-1:rank_b-1])))
if __name__ == '__main__':
main()
``` | 3.969 |
258 | A | Little Elephant and Bits | PROGRAMMING | 1,100 | [
"greedy",
"math"
] | null | null | The Little Elephant has an integer *a*, written in the binary notation. He wants to write this number on a piece of paper.
To make sure that the number *a* fits on the piece of paper, the Little Elephant ought to delete exactly one any digit from number *a* in the binary record. At that a new number appears. It consis... | The single line contains integer *a*, written in the binary notation without leading zeroes. This number contains more than 1 and at most 105 digits. | In the single line print the number that is written without leading zeroes in the binary notation — the answer to the problem. | [
"101\n",
"110010\n"
] | [
"11\n",
"11010\n"
] | In the first sample the best strategy is to delete the second digit. That results in number 11<sub class="lower-index">2</sub> = 3<sub class="lower-index">10</sub>.
In the second sample the best strategy is to delete the third or fourth digits — that results in number 11010<sub class="lower-index">2</sub> = 26<sub cla... | 500 | [
{
"input": "101",
"output": "11"
},
{
"input": "110010",
"output": "11010"
},
{
"input": "10000",
"output": "1000"
},
{
"input": "1111111110",
"output": "111111111"
},
{
"input": "10100101011110101",
"output": "1100101011110101"
},
{
"input": "11101001... | 1,695,276,605 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 37 | 748 | 17,305,600 | n = int(input())
k = str(n)
li = [x for x in k]
okay = False
for i in range(len(li)):
if li[i]=="0":
li = li[:i]+li[i+1:]
okay = True
break
if okay==False:
li = li[:-1]
kk = "".join(li)
print(int(kk)) | Title: Little Elephant and Bits
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Little Elephant has an integer *a*, written in the binary notation. He wants to write this number on a piece of paper.
To make sure that the number *a* fits on the piece of paper, the Little Elephant ought... | ```python
n = int(input())
k = str(n)
li = [x for x in k]
okay = False
for i in range(len(li)):
if li[i]=="0":
li = li[:i]+li[i+1:]
okay = True
break
if okay==False:
li = li[:-1]
kk = "".join(li)
print(int(kk))
``` | 3 | |
513 | B1 | Permutations | PROGRAMMING | 1,400 | [
"brute force"
] | null | null | You are given a permutation *p* of numbers 1,<=2,<=...,<=*n*. Let's define *f*(*p*) as the following sum:
Find the lexicographically *m*-th permutation of length *n* in the set of permutations having the maximum possible value of *f*(*p*). | The single line of input contains two integers *n* and *m* (1<=≤<=*m*<=≤<=*cnt**n*), where *cnt**n* is the number of permutations of length *n* with maximum possible value of *f*(*p*).
The problem consists of two subproblems. The subproblems have different constraints on the input. You will get some score for the corr... | Output *n* number forming the required permutation. | [
"2 2\n",
"3 2\n"
] | [
"2 1 \n",
"1 3 2 \n"
] | In the first example, both permutations of numbers {1, 2} yield maximum possible *f*(*p*) which is equal to 4. Among them, (2, 1) comes second in lexicographical order. | 3 | [
{
"input": "2 2",
"output": "2 1 "
},
{
"input": "3 2",
"output": "1 3 2 "
},
{
"input": "1 1",
"output": "1 "
},
{
"input": "3 1",
"output": "1 2 3 "
},
{
"input": "3 3",
"output": "2 3 1 "
},
{
"input": "3 4",
"output": "3 2 1 "
},
{
"inp... | 1,423,724,264 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS1 | 4 | 62 | 0 | (n,m)=input().split()
(n,m)=(int(n),int(m)-1)
u=[0 for i in range(n)]
for i in range(1,n+1):
u[-i]=m%(i)
m//=i
v=[i for i in range(1,n+1)]
for i in range(n):
v.sort()
t=v[u[i]]
u[i]=str(t)
v.remove(t)
print(' '.join(u)) | Title: Permutations
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given a permutation *p* of numbers 1,<=2,<=...,<=*n*. Let's define *f*(*p*) as the following sum:
Find the lexicographically *m*-th permutation of length *n* in the set of permutations having the maximum possible ... | ```python
(n,m)=input().split()
(n,m)=(int(n),int(m)-1)
u=[0 for i in range(n)]
for i in range(1,n+1):
u[-i]=m%(i)
m//=i
v=[i for i in range(1,n+1)]
for i in range(n):
v.sort()
t=v[u[i]]
u[i]=str(t)
v.remove(t)
print(' '.join(u))
``` | 0 | |
768 | A | Oath of the Night's Watch | PROGRAMMING | 900 | [
"constructive algorithms",
"sortings"
] | null | null | "Night gathers, and now my watch begins. It shall not end until my death. I shall take no wife, hold no lands, father no children. I shall wear no crowns and win no glory. I shall live and die at my post. I am the sword in the darkness. I am the watcher on the walls. I am the shield that guards the realms of men. I ple... | First line consists of a single integer *n* (1<=≤<=*n*<=≤<=105) — the number of stewards with Jon Snow.
Second line consists of *n* space separated integers *a*1,<=*a*2,<=...,<=*a**n* (0<=≤<=*a**i*<=≤<=109) representing the values assigned to the stewards. | Output a single integer representing the number of stewards which Jon will feed. | [
"2\n1 5\n",
"3\n1 2 5\n"
] | [
"0",
"1"
] | In the first sample, Jon Snow cannot support steward with strength 1 because there is no steward with strength less than 1 and he cannot support steward with strength 5 because there is no steward with strength greater than 5.
In the second sample, Jon Snow can support steward with strength 2 because there are steward... | 500 | [
{
"input": "2\n1 5",
"output": "0"
},
{
"input": "3\n1 2 5",
"output": "1"
},
{
"input": "4\n1 2 3 4",
"output": "2"
},
{
"input": "8\n7 8 9 4 5 6 1 2",
"output": "6"
},
{
"input": "1\n1",
"output": "0"
},
{
"input": "1\n100",
"output": "0"
},
... | 1,689,528,215 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 2 | 77 | 13,004,800 | n = int(input())
stewards = list(map(int, input().split()))
print(stewards.count(2)+ stewards.count(3) + stewards.count(4)) | Title: Oath of the Night's Watch
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
"Night gathers, and now my watch begins. It shall not end until my death. I shall take no wife, hold no lands, father no children. I shall wear no crowns and win no glory. I shall live and die at my post. I am... | ```python
n = int(input())
stewards = list(map(int, input().split()))
print(stewards.count(2)+ stewards.count(3) + stewards.count(4))
``` | 0 | |
0 | none | none | none | 0 | [
"none"
] | null | null | Andryusha is an orderly boy and likes to keep things in their place.
Today he faced a problem to put his socks in the wardrobe. He has *n* distinct pairs of socks which are initially in a bag. The pairs are numbered from 1 to *n*. Andryusha wants to put paired socks together and put them in the wardrobe. He takes the ... | The first line contains the single integer *n* (1<=≤<=*n*<=≤<=105) — the number of sock pairs.
The second line contains 2*n* integers *x*1,<=*x*2,<=...,<=*x*2*n* (1<=≤<=*x**i*<=≤<=*n*), which describe the order in which Andryusha took the socks from the bag. More precisely, *x**i* means that the *i*-th sock Andryusha ... | Print single integer — the maximum number of socks that were on the table at the same time. | [
"1\n1 1\n",
"3\n2 1 1 3 2 3\n"
] | [
"1\n",
"2\n"
] | In the first example Andryusha took a sock from the first pair and put it on the table. Then he took the next sock which is from the first pair as well, so he immediately puts both socks to the wardrobe. Thus, at most one sock was on the table at the same time.
In the second example Andryusha behaved as follows:
- ... | 0 | [
{
"input": "1\n1 1",
"output": "1"
},
{
"input": "3\n2 1 1 3 2 3",
"output": "2"
},
{
"input": "5\n5 1 3 2 4 3 1 2 4 5",
"output": "5"
},
{
"input": "10\n4 2 6 3 4 8 7 1 1 5 2 10 6 8 3 5 10 9 9 7",
"output": "6"
},
{
"input": "50\n30 47 31 38 37 50 36 43 9 23 2 2 ... | 1,488,719,538 | 438 | Python 3 | OK | TESTS | 56 | 171 | 18,227,200 | def main():
#checked = set()
temp = int(input())
lst = list(map(int, input().split()))
counter = 1
lst2 = set()
for i in lst:
if i not in lst2:
lst2.add(i)
if len(lst2) > counter:
counter = len(lst2)
else:
lst2.remove(i)
return counter
print(main()) | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Andryusha is an orderly boy and likes to keep things in their place.
Today he faced a problem to put his socks in the wardrobe. He has *n* distinct pairs of socks which are initially in a bag. The pairs are numbered from 1 to *n*... | ```python
def main():
#checked = set()
temp = int(input())
lst = list(map(int, input().split()))
counter = 1
lst2 = set()
for i in lst:
if i not in lst2:
lst2.add(i)
if len(lst2) > counter:
counter = len(lst2)
else:
lst2.remove(i)
return counter
print(main())
``` | 3 | |
659 | B | Qualifying Contest | PROGRAMMING | 1,300 | [
"constructive algorithms",
"sortings"
] | null | null | Very soon Berland will hold a School Team Programming Olympiad. From each of the *m* Berland regions a team of two people is invited to participate in the olympiad. The qualifying contest to form teams was held and it was attended by *n* Berland students. There were at least two schoolboys participating from each of th... | The first line of the input contains two integers *n* and *m* (2<=≤<=*n*<=≤<=100<=000, 1<=≤<=*m*<=≤<=10<=000, *n*<=≥<=2*m*) — the number of participants of the qualifying contest and the number of regions in Berland.
Next *n* lines contain the description of the participants of the qualifying contest in the following ... | Print *m* lines. On the *i*-th line print the team of the *i*-th region — the surnames of the two team members in an arbitrary order, or a single character "?" (without the quotes) if you need to spend further qualifying contests in the region. | [
"5 2\nIvanov 1 763\nAndreev 2 800\nPetrov 1 595\nSidorov 1 790\nSemenov 2 503\n",
"5 2\nIvanov 1 800\nAndreev 2 763\nPetrov 1 800\nSidorov 1 800\nSemenov 2 503\n"
] | [
"Sidorov Ivanov\nAndreev Semenov\n",
"?\nAndreev Semenov\n"
] | In the first sample region teams are uniquely determined.
In the second sample the team from region 2 is uniquely determined and the team from region 1 can have three teams: "Petrov"-"Sidorov", "Ivanov"-"Sidorov", "Ivanov" -"Petrov", so it is impossible to determine a team uniquely. | 1,000 | [
{
"input": "5 2\nIvanov 1 763\nAndreev 2 800\nPetrov 1 595\nSidorov 1 790\nSemenov 2 503",
"output": "Sidorov Ivanov\nAndreev Semenov"
},
{
"input": "5 2\nIvanov 1 800\nAndreev 2 763\nPetrov 1 800\nSidorov 1 800\nSemenov 2 503",
"output": "?\nAndreev Semenov"
},
{
"input": "10 2\nSHiBIEz... | 1,643,561,390 | 2,147,483,647 | PyPy 3-64 | TIME_LIMIT_EXCEEDED | TESTS | 5 | 1,000 | 21,504,000 | n,m=map(int,input().split())
d={}
for i in range(m): d[i+1]=[]
for i in range(n):
a,b,c=input().split(); b,c=map(int,[b,c])
d[b]+=[(c,a)]
for i in range(m):
t=sorted(d[i+1])[::-1]
print("?" if len(t)>2 and (t[1][0]==t[2][0]) else t[0][1]+' '+t[1][1]) | Title: Qualifying Contest
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Very soon Berland will hold a School Team Programming Olympiad. From each of the *m* Berland regions a team of two people is invited to participate in the olympiad. The qualifying contest to form teams was held and i... | ```python
n,m=map(int,input().split())
d={}
for i in range(m): d[i+1]=[]
for i in range(n):
a,b,c=input().split(); b,c=map(int,[b,c])
d[b]+=[(c,a)]
for i in range(m):
t=sorted(d[i+1])[::-1]
print("?" if len(t)>2 and (t[1][0]==t[2][0]) else t[0][1]+' '+t[1][1])
``` | 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... | 1,662,789,192 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 92 | 0 | sa = input()
suc = 0
slc = 0
for i in sa:
if i.islower():
slc += 1
else:
suc += 1
if slc > suc:
print(sa.lower())
elif slc < suc:
print(sa.upper())
else:
print(sa.lower()) | 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
sa = input()
suc = 0
slc = 0
for i in sa:
if i.islower():
slc += 1
else:
suc += 1
if slc > suc:
print(sa.lower())
elif slc < suc:
print(sa.upper())
else:
print(sa.lower())
``` | 3.977 |
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"
},
{
... | 1,689,835,730 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 43 | 62 | 0 | k=int(input())
m=input()
n=input()
o=0
for i in range(len(m)):
if abs(int(m[i])-int(n[i]))<=5:
o+=abs(int(m[i])-int(n[i]))
# print(o,m[i],n[i])
else:
j=abs(int(m[i])-int(n[i]))
maxi=max(int(m[i]),int(n[i]))
u=min(int(m[i]),int(n[i]))+(10-maxi)
o+=u
#print(o,m[i],n[i])
print(o)
| 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
k=int(input())
m=input()
n=input()
o=0
for i in range(len(m)):
if abs(int(m[i])-int(n[i]))<=5:
o+=abs(int(m[i])-int(n[i]))
# print(o,m[i],n[i])
else:
j=abs(int(m[i])-int(n[i]))
maxi=max(int(m[i]),int(n[i]))
u=min(int(m[i]),int(n[i]))+(10-maxi)
o+=u
#print(o,m[i],n[i])
print(o)
... | 3 | |
518 | A | Vitaly and Strings | PROGRAMMING | 1,600 | [
"constructive algorithms",
"strings"
] | null | null | Vitaly is a diligent student who never missed a lesson in his five years of studying in the university. He always does his homework on time and passes his exams in time.
During the last lesson the teacher has provided two strings *s* and *t* to Vitaly. The strings have the same length, they consist of lowercase Engli... | The first line contains string *s* (1<=≤<=|*s*|<=≤<=100), consisting of lowercase English letters. Here, |*s*| denotes the length of the string.
The second line contains string *t* (|*t*|<==<=|*s*|), consisting of lowercase English letters.
It is guaranteed that the lengths of strings *s* and *t* are the same and str... | If the string that meets the given requirements doesn't exist, print a single string "No such string" (without the quotes).
If such string exists, print it. If there are multiple valid strings, you may print any of them. | [
"a\nc\n",
"aaa\nzzz\n",
"abcdefg\nabcdefh\n"
] | [
"b\n",
"kkk\n",
"No such string\n"
] | String *s* = *s*<sub class="lower-index">1</sub>*s*<sub class="lower-index">2</sub>... *s*<sub class="lower-index">*n*</sub> is said to be lexicographically smaller than *t* = *t*<sub class="lower-index">1</sub>*t*<sub class="lower-index">2</sub>... *t*<sub class="lower-index">*n*</sub>, if there exists such *i*, that ... | 500 | [
{
"input": "a\nc",
"output": "b"
},
{
"input": "aaa\nzzz",
"output": "kkk"
},
{
"input": "abcdefg\nabcdefh",
"output": "No such string"
},
{
"input": "abcdefg\nabcfefg",
"output": "abcdefh"
},
{
"input": "frt\nfru",
"output": "No such string"
},
{
"inp... | 1,690,717,209 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 9 | 31 | 0 | # LUOGU_RID: 118159259
def nxt(s):
if s.count('z')==len(s):
return 'a'*(len(s)+1)
for i in range(len(s)-1,-1,-1):
if a[i]!='z':
return a[:i]+chr(ord(a[i])+1)+a[i+1:]
a,b=input(),input()
c=nxt(a)
if c==b:
print('No such string')
else:
print(c) | Title: Vitaly and Strings
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vitaly is a diligent student who never missed a lesson in his five years of studying in the university. He always does his homework on time and passes his exams in time.
During the last lesson the teacher has provi... | ```python
# LUOGU_RID: 118159259
def nxt(s):
if s.count('z')==len(s):
return 'a'*(len(s)+1)
for i in range(len(s)-1,-1,-1):
if a[i]!='z':
return a[:i]+chr(ord(a[i])+1)+a[i+1:]
a,b=input(),input()
c=nxt(a)
if c==b:
print('No such string')
else:
print(c)
``` | 0 | |
340 | A | The Wall | PROGRAMMING | 1,200 | [
"math"
] | null | null | Iahub and his friend Floyd have started painting a wall. Iahub is painting the wall red and Floyd is painting it pink. You can consider the wall being made of a very large number of bricks, numbered 1, 2, 3 and so on.
Iahub has the following scheme of painting: he skips *x*<=-<=1 consecutive bricks, then he paints th... | The input will have a single line containing four integers in this order: *x*, *y*, *a*, *b*. (1<=≤<=*x*,<=*y*<=≤<=1000, 1<=≤<=*a*,<=*b*<=≤<=2·109, *a*<=≤<=*b*). | Output a single integer — the number of bricks numbered no less than *a* and no greater than *b* that are painted both red and pink. | [
"2 3 6 18\n"
] | [
"3"
] | Let's look at the bricks from *a* to *b* (*a* = 6, *b* = 18). The bricks colored in red are numbered 6, 8, 10, 12, 14, 16, 18. The bricks colored in pink are numbered 6, 9, 12, 15, 18. The bricks colored in both red and pink are numbered with 6, 12 and 18. | 500 | [
{
"input": "2 3 6 18",
"output": "3"
},
{
"input": "4 6 20 201",
"output": "15"
},
{
"input": "15 27 100 10000",
"output": "74"
},
{
"input": "105 60 3456 78910",
"output": "179"
},
{
"input": "1 1 1000 100000",
"output": "99001"
},
{
"input": "3 2 5 5... | 1,377,878,940 | 2,340 | Python 3 | WRONG_ANSWER | PRETESTS | 0 | 30 | 0 | # for finding lcm we need to know gcd
def gcd(a,b):
while b!=0:
temp=b
b=a%b
a=temp
return a
def lcm(a,b):
g=gcd(a,b)
lc=(a*b)//g
print(lc)
return lc
while(1):
try:
a=list(map(int,input().split()))
maxi=0 if a[0]>a[1] else 1
i... | Title: The Wall
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Iahub and his friend Floyd have started painting a wall. Iahub is painting the wall red and Floyd is painting it pink. You can consider the wall being made of a very large number of bricks, numbered 1, 2, 3 and so on.
Iahub ... | ```python
# for finding lcm we need to know gcd
def gcd(a,b):
while b!=0:
temp=b
b=a%b
a=temp
return a
def lcm(a,b):
g=gcd(a,b)
lc=(a*b)//g
print(lc)
return lc
while(1):
try:
a=list(map(int,input().split()))
maxi=0 if a[0]>a[1] else 1
... | 0 | |
11 | B | Jumping Jack | PROGRAMMING | 1,600 | [
"math"
] | B. Jumping Jack | 1 | 64 | Jack is working on his jumping skills recently. Currently he's located at point zero of the number line. He would like to get to the point *x*. In order to train, he has decided that he'll first jump by only one unit, and each subsequent jump will be exactly one longer than the previous one. He can go either left or ri... | The input data consists of only one integer *x* (<=-<=109<=≤<=*x*<=≤<=109). | Output the minimal number of jumps that Jack requires to reach *x*. | [
"2\n",
"6\n",
"0\n"
] | [
"3\n",
"3\n",
"0\n"
] | none | 0 | [
{
"input": "2",
"output": "3"
},
{
"input": "6",
"output": "3"
},
{
"input": "0",
"output": "0"
},
{
"input": "-1000000000",
"output": "44723"
},
{
"input": "999961560",
"output": "44720"
},
{
"input": "999961561",
"output": "44721"
},
{
"i... | 1,452,284,635 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 154 | 0 | x, s, v = abs(int(input())), 0, 0
while s < x or (x ^ s) & 1:
v += 1
s += v
print(v) | Title: Jumping Jack
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
Jack is working on his jumping skills recently. Currently he's located at point zero of the number line. He would like to get to the point *x*. In order to train, he has decided that he'll first jump by only one unit, and each ... | ```python
x, s, v = abs(int(input())), 0, 0
while s < x or (x ^ s) & 1:
v += 1
s += v
print(v)
``` | 3.923 |
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... | 1,642,846,016 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 122 | 0 | s = input()
count = 0
count1 = 0
for i in s:
if i.islower():
count+=1
elif i.isupper():
count1+=1
if count == count1:
print(s.lower())
elif count > count1:
print(s.lower())
elif count < count1:
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
s = input()
count = 0
count1 = 0
for i in s:
if i.islower():
count+=1
elif i.isupper():
count1+=1
if count == count1:
print(s.lower())
elif count > count1:
print(s.lower())
elif count < count1:
print(s.upper())
``` | 3.9695 |
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... | 1,620,427,367 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 92 | 6,656,000 | x = input()
y = input()
x = x.split()
y = y.split()
reading_hours = int(x[-1])
hours = [int(hour) for hour in y]
print(reading_hours)
print(hours)
| 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
x = input()
y = input()
x = x.split()
y = y.split()
reading_hours = int(x[-1])
hours = [int(hour) for hour in y]
print(reading_hours)
print(hours)
``` | -1 | |
895 | C | Square Subsets | PROGRAMMING | 2,000 | [
"bitmasks",
"combinatorics",
"dp",
"math"
] | null | null | Petya was late for the lesson too. The teacher gave him an additional task. For some array *a* Petya should find the number of different ways to select non-empty subset of elements from it in such a way that their product is equal to a square of some integer.
Two ways are considered different if sets of indexes of ele... | First line contains one integer *n* (1<=≤<=*n*<=≤<=105) — the number of elements in the array.
Second line contains *n* integers *a**i* (1<=≤<=*a**i*<=≤<=70) — the elements of the array. | Print one integer — the number of different ways to choose some elements so that their product is a square of a certain integer modulo 109<=+<=7. | [
"4\n1 1 1 1\n",
"4\n2 2 2 2\n",
"5\n1 2 4 5 8\n"
] | [
"15\n",
"7\n",
"7\n"
] | In first sample product of elements chosen by any way is 1 and 1 = 1<sup class="upper-index">2</sup>. So the answer is 2<sup class="upper-index">4</sup> - 1 = 15.
In second sample there are six different ways to choose elements so that their product is 4, and only one way so that their product is 16. So the answer is ... | 1,750 | [
{
"input": "4\n1 1 1 1",
"output": "15"
},
{
"input": "4\n2 2 2 2",
"output": "7"
},
{
"input": "5\n1 2 4 5 8",
"output": "7"
},
{
"input": "1\n64",
"output": "1"
},
{
"input": "5\n2 2 2 2 2",
"output": "15"
},
{
"input": "6\n1 2 3 4 5 6",
"output"... | 1,582,483,260 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 11 | 139 | 0 | n = int(input())
*a, = map(int, input().split())
mod = 1000000007
d = []
primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67]
b = [0, 1, 2, 0, 4, 1, 8, 1, 0, 3, 16, 2, 32, 7, 2, 0, 64, 3, 128, 4, 6, 15, 256, 1, 0,31, 2, 8, 512, 5, 1024, 1, 14, 63, 4, 0, 2048, 127, 30, 3, 4096, 9, 8192,... | Title: Square Subsets
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Petya was late for the lesson too. The teacher gave him an additional task. For some array *a* Petya should find the number of different ways to select non-empty subset of elements from it in such a way that their produc... | ```python
n = int(input())
*a, = map(int, input().split())
mod = 1000000007
d = []
primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67]
b = [0, 1, 2, 0, 4, 1, 8, 1, 0, 3, 16, 2, 32, 7, 2, 0, 64, 3, 128, 4, 6, 15, 256, 1, 0,31, 2, 8, 512, 5, 1024, 1, 14, 63, 4, 0, 2048, 127, 30, 3, 4096... | 0 | |
784 | F | Crunching Numbers Just for You | PROGRAMMING | 1,900 | [
"*special",
"implementation"
] | null | null | You are developing a new feature for the website which sells airline tickets: being able to sort tickets by price! You have already extracted the tickets' prices, so there's just the last step to be done...
You are given an array of integers. Sort it in non-descending order. | The input consists of a single line of space-separated integers. The first number is *n* (1<=≤<=*n*<=≤<=10) — the size of the array. The following *n* numbers are the elements of the array (1<=≤<=*a**i*<=≤<=100). | Output space-separated elements of the sorted array. | [
"3 3 1 2\n"
] | [
"1 2 3 \n"
] | Remember, this is a very important feature, and you have to make sure the customers appreciate it! | 0 | [
{
"input": "3 3 1 2",
"output": "1 2 3 "
},
{
"input": "10 54 100 27 1 33 27 80 49 27 6",
"output": "1 6 27 27 27 33 49 54 80 100 "
}
] | 1,691,669,716 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | x=list(map(int,input().split()))
x.remove(ls[0]
s=sorted(x)
print(s) | Title: Crunching Numbers Just for You
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are developing a new feature for the website which sells airline tickets: being able to sort tickets by price! You have already extracted the tickets' prices, so there's just the last step to be done.... | ```python
x=list(map(int,input().split()))
x.remove(ls[0]
s=sorted(x)
print(s)
``` | -1 | |
12 | B | Correct Solution? | PROGRAMMING | 1,100 | [
"implementation",
"sortings"
] | B. Correct Solution? | 2 | 256 | One cold winter evening Alice and her older brother Bob was sitting at home near the fireplace and giving each other interesting problems to solve. When it was Alice's turn, she told the number *n* to Bob and said:
—Shuffle the digits in this number in order to obtain the smallest possible number without leading zeroe... | The first line contains one integer *n* (0<=≤<=*n*<=≤<=109) without leading zeroes. The second lines contains one integer *m* (0<=≤<=*m*<=≤<=109) — Bob's answer, possibly with leading zeroes. | Print OK if Bob's answer is correct and WRONG_ANSWER otherwise. | [
"3310\n1033\n",
"4\n5\n"
] | [
"OK\n",
"WRONG_ANSWER\n"
] | none | 0 | [
{
"input": "3310\n1033",
"output": "OK"
},
{
"input": "4\n5",
"output": "WRONG_ANSWER"
},
{
"input": "40\n04",
"output": "WRONG_ANSWER"
},
{
"input": "12\n12",
"output": "OK"
},
{
"input": "432\n234",
"output": "OK"
},
{
"input": "17109\n01179",
"o... | 1,639,238,860 | 2,147,483,647 | PyPy 3 | OK | TESTS | 32 | 154 | 0 | n=list(input())
a=list(input())
k=[ord(x)-48 for x in n]
s=0
k.sort()
k.reverse()
l=len(n)
for x in reversed(range(l)):
if k[x]!=0:
break
else:
s+=1
k.pop()
k.reverse()
while s>0:
k.insert(1,0)
s-=1
res = [str(i) for i in k]
v=("".join(res))
m = [str(i) for i ... | Title: Correct Solution?
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
One cold winter evening Alice and her older brother Bob was sitting at home near the fireplace and giving each other interesting problems to solve. When it was Alice's turn, she told the number *n* to Bob and said:
—Shuf... | ```python
n=list(input())
a=list(input())
k=[ord(x)-48 for x in n]
s=0
k.sort()
k.reverse()
l=len(n)
for x in reversed(range(l)):
if k[x]!=0:
break
else:
s+=1
k.pop()
k.reverse()
while s>0:
k.insert(1,0)
s-=1
res = [str(i) for i in k]
v=("".join(res))
m = [str... | 3.9615 |
49 | A | Sleuth | PROGRAMMING | 800 | [
"implementation"
] | A. Sleuth | 2 | 256 | Vasya plays the sleuth with his friends. The rules of the game are as follows: those who play for the first time, that is Vasya is the sleuth, he should investigate a "crime" and find out what is happening. He can ask any questions whatsoever that can be answered with "Yes" or "No". All the rest agree beforehand to ans... | The single line contains a question represented by a non-empty line consisting of large and small Latin letters, spaces and a question mark. The line length does not exceed 100. It is guaranteed that the question mark occurs exactly once in the line — as the last symbol and that the line contains at least one letter. | Print answer for the question in a single line: YES if the answer is "Yes", NO if the answer is "No".
Remember that in the reply to the question the last letter, not the last character counts. I. e. the spaces and the question mark do not count as letters. | [
"Is it a melon?\n",
"Is it an apple?\n",
"Is it a banana ?\n",
"Is it an apple and a banana simultaneouSLY?\n"
] | [
"NO\n",
"YES\n",
"YES\n",
"YES\n"
] | none | 500 | [
{
"input": "Is it a melon?",
"output": "NO"
},
{
"input": "Is it an apple?",
"output": "YES"
},
{
"input": " Is it a banana ?",
"output": "YES"
},
{
"input": "Is it an apple and a banana simultaneouSLY?",
"output": "YES"
},
{
"input": "oHtSbDwzHb?",
... | 1,577,558,382 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 0 | 404 | 2,355,200 | a=input().split()
vow=[a,e,i,o,u,y,A,E,I,O,U,Y]
l=[]
for i in a:
if i:
l.append(i)
if(len(l[-1])>1):
if(l[-1][-2] in vow):
print('YES')
else:
print('NO')
else:
if(l[-2][-1] in vow):
print('YES')
else:
print('NO')
| Title: Sleuth
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya plays the sleuth with his friends. The rules of the game are as follows: those who play for the first time, that is Vasya is the sleuth, he should investigate a "crime" and find out what is happening. He can ask any questions ... | ```python
a=input().split()
vow=[a,e,i,o,u,y,A,E,I,O,U,Y]
l=[]
for i in a:
if i:
l.append(i)
if(len(l[-1])>1):
if(l[-1][-2] in vow):
print('YES')
else:
print('NO')
else:
if(l[-2][-1] in vow):
print('YES')
else:
print('NO')
... | -1 |
789 | A | Anastasia and pebbles | PROGRAMMING | 1,100 | [
"implementation",
"math"
] | null | null | Anastasia loves going for a walk in Central Uzhlyandian Park. But she became uninterested in simple walking, so she began to collect Uzhlyandian pebbles. At first, she decided to collect all the pebbles she could find in the park.
She has only two pockets. She can put at most *k* pebbles in each pocket at the same tim... | The first line contains two integers *n* and *k* (1<=≤<=*n*<=≤<=105, 1<=≤<=*k*<=≤<=109) — the number of different pebble types and number of pebbles Anastasia can place in one pocket.
The second line contains *n* integers *w*1,<=*w*2,<=...,<=*w**n* (1<=≤<=*w**i*<=≤<=104) — number of pebbles of each type. | The only line of output contains one integer — the minimum number of days Anastasia needs to collect all the pebbles. | [
"3 2\n2 3 4\n",
"5 4\n3 1 8 9 7\n"
] | [
"3\n",
"5\n"
] | In the first sample case, Anastasia can collect all pebbles of the first type on the first day, of second type — on the second day, and of third type — on the third day.
Optimal sequence of actions in the second sample case:
- In the first day Anastasia collects 8 pebbles of the third type. - In the second day she... | 500 | [
{
"input": "3 2\n2 3 4",
"output": "3"
},
{
"input": "5 4\n3 1 8 9 7",
"output": "5"
},
{
"input": "1 22\n1",
"output": "1"
},
{
"input": "3 57\n78 165 54",
"output": "3"
},
{
"input": "5 72\n74 10 146 189 184",
"output": "6"
},
{
"input": "9 13\n132 8... | 1,662,555,079 | 2,147,483,647 | Python 3 | OK | TESTS | 31 | 108 | 6,963,200 | import math
iter = 1
for _ in range(iter):
n,k = list(map(int,input().split(' ')))
w = list(map(int,input().split(' ')))
r = 0
for i in range(n):
r+=math.ceil(w[i]/k)
print(math.ceil(r/2)) | Title: Anastasia and pebbles
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Anastasia loves going for a walk in Central Uzhlyandian Park. But she became uninterested in simple walking, so she began to collect Uzhlyandian pebbles. At first, she decided to collect all the pebbles she could ... | ```python
import math
iter = 1
for _ in range(iter):
n,k = list(map(int,input().split(' ')))
w = list(map(int,input().split(' ')))
r = 0
for i in range(n):
r+=math.ceil(w[i]/k)
print(math.ceil(r/2))
``` | 3 | |
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"... | 1,663,166,507 | 2,147,483,647 | Python 3 | OK | TESTS | 20 | 46 | 0 | n, m, a = map(int, input().split())
x = int(n / a)
y = int(m / a)
if n % a != 0:
x += 1
if m % a != 0:
y += 1
print(x * y) | 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
n, m, a = map(int, input().split())
x = int(n / a)
y = int(m / a)
if n % a != 0:
x += 1
if m % a != 0:
y += 1
print(x * y)
``` | 3.977 |
793 | B | Igor and his way to work | PROGRAMMING | 1,600 | [
"dfs and similar",
"graphs",
"implementation",
"shortest paths"
] | null | null | Woken up by the alarm clock Igor the financial analyst hurried up to the work. He ate his breakfast and sat in his car. Sadly, when he opened his GPS navigator, he found that some of the roads in Bankopolis, the city where he lives, are closed due to road works. Moreover, Igor has some problems with the steering wheel,... | The first line contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=1000) — the number of rows and the number of columns in the grid.
Each of the next *n* lines contains *m* characters denoting the corresponding row of the grid. The following characters can occur:
- "." — an empty cell; - "*" — a cell with road ... | In the only line print "YES" if there is a path between Igor's home and Igor's office with no more than two turns, and "NO" otherwise. | [
"5 5\n..S..\n****.\nT....\n****.\n.....\n",
"5 5\nS....\n****.\n.....\n.****\n..T..\n"
] | [
"YES",
"NO"
] | The first sample is shown on the following picture:
In the second sample it is impossible to reach Igor's office using less that 4 turns, thus there exists no path using no more than 2 turns. The path using exactly 4 turns is shown on this picture: | 1,000 | [
{
"input": "5 5\nS....\n****.\n.....\n.****\n..T..",
"output": "NO"
},
{
"input": "1 2\nST",
"output": "YES"
},
{
"input": "3 1\nS\n*\nT",
"output": "NO"
},
{
"input": "3 3\n*..\n...\nTS.",
"output": "YES"
},
{
"input": "3 3\nT.*\n*.*\n*S*",
"output": "YES"
... | 1,582,630,066 | 2,147,483,647 | PyPy 3 | TIME_LIMIT_EXCEEDED | TESTS | 8 | 3,000 | 101,888,000 | from collections import deque
import heapq
def valid(i,j,n,m):
if(i>=0 and i<=n-1 and j>=0 and j<=m-1):
return 1
return 0
n,m=list(map(int,input().split()))
a=list()
for i in range(0,n):
e=input()
l=list(e)
a.append(l)
for j in range(0,m):
if(a[i][j]=="S"):
... | Title: Igor and his way to work
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Woken up by the alarm clock Igor the financial analyst hurried up to the work. He ate his breakfast and sat in his car. Sadly, when he opened his GPS navigator, he found that some of the roads in Bankopolis, th... | ```python
from collections import deque
import heapq
def valid(i,j,n,m):
if(i>=0 and i<=n-1 and j>=0 and j<=m-1):
return 1
return 0
n,m=list(map(int,input().split()))
a=list()
for i in range(0,n):
e=input()
l=list(e)
a.append(l)
for j in range(0,m):
if(a[i][j]=="S"):... | 0 | |
151 | A | Soft Drinking | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | This winter is so cold in Nvodsk! A group of *n* friends decided to buy *k* bottles of a soft drink called "Take-It-Light" to warm up a bit. Each bottle has *l* milliliters of the drink. Also they bought *c* limes and cut each of them into *d* slices. After that they found *p* grams of salt.
To make a toast, each frie... | The first and only line contains positive integers *n*, *k*, *l*, *c*, *d*, *p*, *nl*, *np*, not exceeding 1000 and no less than 1. The numbers are separated by exactly one space. | Print a single integer — the number of toasts each friend can make. | [
"3 4 5 10 8 100 3 1\n",
"5 100 10 1 19 90 4 3\n",
"10 1000 1000 25 23 1 50 1\n"
] | [
"2\n",
"3\n",
"0\n"
] | A comment to the first sample:
Overall the friends have 4 * 5 = 20 milliliters of the drink, it is enough to make 20 / 3 = 6 toasts. The limes are enough for 10 * 8 = 80 toasts and the salt is enough for 100 / 1 = 100 toasts. However, there are 3 friends in the group, so the answer is *min*(6, 80, 100) / 3 = 2. | 500 | [
{
"input": "3 4 5 10 8 100 3 1",
"output": "2"
},
{
"input": "5 100 10 1 19 90 4 3",
"output": "3"
},
{
"input": "10 1000 1000 25 23 1 50 1",
"output": "0"
},
{
"input": "1 7 4 5 5 8 3 2",
"output": "4"
},
{
"input": "2 3 3 5 5 10 1 3",
"output": "1"
},
{
... | 1,688,748,901 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 62 | 0 | v1, v2, v3, v4, v5, v6, v7, v8 = map(int, input().split())
max_toasts_drink = (v2 * v3) // v1
max_toasts_lime = v4 * v5
max_toasts_salt = v6 // v8
min_toasts = min(max_toasts_drink, max_toasts_lime, max_toasts_salt) // v7
print(min_toasts)
| Title: Soft Drinking
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
This winter is so cold in Nvodsk! A group of *n* friends decided to buy *k* bottles of a soft drink called "Take-It-Light" to warm up a bit. Each bottle has *l* milliliters of the drink. Also they bought *c* limes and cut... | ```python
v1, v2, v3, v4, v5, v6, v7, v8 = map(int, input().split())
max_toasts_drink = (v2 * v3) // v1
max_toasts_lime = v4 * v5
max_toasts_salt = v6 // v8
min_toasts = min(max_toasts_drink, max_toasts_lime, max_toasts_salt) // v7
print(min_toasts)
``` | 0 | |
779 | C | Dishonest Sellers | PROGRAMMING | 1,200 | [
"constructive algorithms",
"greedy",
"sortings"
] | null | null | Igor found out discounts in a shop and decided to buy *n* items. Discounts at the store will last for a week and Igor knows about each item that its price now is *a**i*, and after a week of discounts its price will be *b**i*.
Not all of sellers are honest, so now some products could be more expensive than after a week... | In the first line there are two positive integer numbers *n* and *k* (1<=≤<=*n*<=≤<=2·105, 0<=≤<=*k*<=≤<=*n*) — total number of items to buy and minimal number of items Igor wants to by right now.
The second line contains sequence of integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=104) — prices of items during d... | Print the minimal amount of money Igor will spend to buy all *n* items. Remember, he should buy at least *k* items right now. | [
"3 1\n5 4 6\n3 1 5\n",
"5 3\n3 4 7 10 3\n4 5 5 12 5\n"
] | [
"10\n",
"25\n"
] | In the first example Igor should buy item 3 paying 6. But items 1 and 2 he should buy after a week. He will pay 3 and 1 for them. So in total he will pay 6 + 3 + 1 = 10.
In the second example Igor should buy right now items 1, 2, 4 and 5, paying for them 3, 4, 10 and 3, respectively. Item 3 he should buy after a week ... | 1,000 | [
{
"input": "3 1\n5 4 6\n3 1 5",
"output": "10"
},
{
"input": "5 3\n3 4 7 10 3\n4 5 5 12 5",
"output": "25"
},
{
"input": "1 0\n9\n8",
"output": "8"
},
{
"input": "2 0\n4 10\n1 2",
"output": "3"
},
{
"input": "4 2\n19 5 17 13\n3 18 8 10",
"output": "29"
},
... | 1,509,330,397 | 2,147,483,647 | Python 3 | OK | TESTS | 67 | 499 | 18,022,400 | n=list(map(int,input().split()))
l=list(map(int,input().split()))
t=list(map(int,input().split()))
d=sorted([l[i]-t[i] for i in range(len(l))])
for i in range (len(d)):
n[0]=n[0]+min(t[i],l[i])
for j in range (n[1]):
n[0]=n[0]+(max(d[j],0))
print(n[0]-len(d)) | Title: Dishonest Sellers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Igor found out discounts in a shop and decided to buy *n* items. Discounts at the store will last for a week and Igor knows about each item that its price now is *a**i*, and after a week of discounts its price will be... | ```python
n=list(map(int,input().split()))
l=list(map(int,input().split()))
t=list(map(int,input().split()))
d=sorted([l[i]-t[i] for i in range(len(l))])
for i in range (len(d)):
n[0]=n[0]+min(t[i],l[i])
for j in range (n[1]):
n[0]=n[0]+(max(d[j],0))
print(n[0]-len(d))
``` | 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... | 1,569,242,223 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 93 | 0 | x="hello"
i=0
flag=0
j=0
s=input()
while i is not len(s):
if s[i]==x[j]:
j+=1
flag+=1
i+=1
if flag is 5:
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
x="hello"
i=0
flag=0
j=0
s=input()
while i is not len(s):
if s[i]==x[j]:
j+=1
flag+=1
i+=1
if flag is 5:
print("YES")
else:
print("NO")
``` | -1 |
315 | A | Sereja and Bottles | PROGRAMMING | 1,400 | [
"brute force"
] | null | null | Sereja and his friends went to a picnic. The guys had *n* soda bottles just for it. Sereja forgot the bottle opener as usual, so the guys had to come up with another way to open bottles.
Sereja knows that the *i*-th bottle is from brand *a**i*, besides, you can use it to open other bottles of brand *b**i*. You can use... | The first line contains integer *n* (1<=≤<=*n*<=≤<=100) — the number of bottles. The next *n* lines contain the bottles' description. The *i*-th line contains two integers *a**i*,<=*b**i* (1<=≤<=*a**i*,<=*b**i*<=≤<=1000) — the description of the *i*-th bottle. | In a single line print a single integer — the answer to the problem. | [
"4\n1 1\n2 2\n3 3\n4 4\n",
"4\n1 2\n2 3\n3 4\n4 1\n"
] | [
"4\n",
"0\n"
] | none | 500 | [
{
"input": "4\n1 1\n2 2\n3 3\n4 4",
"output": "4"
},
{
"input": "4\n1 2\n2 3\n3 4\n4 1",
"output": "0"
},
{
"input": "3\n2 828\n4 392\n4 903",
"output": "3"
},
{
"input": "4\n2 3\n1 772\n3 870\n3 668",
"output": "2"
},
{
"input": "5\n1 4\n6 6\n4 3\n3 4\n4 758",
... | 1,502,702,429 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 10 | 124 | 4,608,000 | n = int(input())
res = [[0, False, 0] for k in range(1000)]
for i in range(n):
a, b = list(map(int, input().split()))
res[a - 1][0] += 1
if a != b:
res[b - 1][1] = True
else:
res[b - 1][2] += 1
ans = 0
for el in res:
if not el[1] or el[2] > 1:
ans += el[0]
elif el[0] > 1 ... | Title: Sereja and Bottles
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Sereja and his friends went to a picnic. The guys had *n* soda bottles just for it. Sereja forgot the bottle opener as usual, so the guys had to come up with another way to open bottles.
Sereja knows that the *i*-th... | ```python
n = int(input())
res = [[0, False, 0] for k in range(1000)]
for i in range(n):
a, b = list(map(int, input().split()))
res[a - 1][0] += 1
if a != b:
res[b - 1][1] = True
else:
res[b - 1][2] += 1
ans = 0
for el in res:
if not el[1] or el[2] > 1:
ans += el[0]
elif ... | 0 | |
990 | A | Commentary Boxes | PROGRAMMING | 1,000 | [
"implementation",
"math"
] | null | null | Berland Football Cup starts really soon! Commentators from all over the world come to the event.
Organizers have already built $n$ commentary boxes. $m$ regional delegations will come to the Cup. Every delegation should get the same number of the commentary boxes. If any box is left unoccupied then the delegations wil... | The only line contains four integer numbers $n$, $m$, $a$ and $b$ ($1 \le n, m \le 10^{12}$, $1 \le a, b \le 100$), where $n$ is the initial number of the commentary boxes, $m$ is the number of delegations to come, $a$ is the fee to build a box and $b$ is the fee to demolish a box. | Output the minimal amount of burles organizers should pay to satisfy all the delegations (i.e. to make the number of the boxes be divisible by $m$). It is allowed that the final number of the boxes is equal to $0$. | [
"9 7 3 8\n",
"2 7 3 7\n",
"30 6 17 19\n"
] | [
"15\n",
"14\n",
"0\n"
] | In the first example organizers can build $5$ boxes to make the total of $14$ paying $3$ burles for the each of them.
In the second example organizers can demolish $2$ boxes to make the total of $0$ paying $7$ burles for the each of them.
In the third example organizers are already able to distribute all the boxes eq... | 0 | [
{
"input": "9 7 3 8",
"output": "15"
},
{
"input": "2 7 3 7",
"output": "14"
},
{
"input": "30 6 17 19",
"output": "0"
},
{
"input": "500000000001 1000000000000 100 100",
"output": "49999999999900"
},
{
"input": "1000000000000 750000000001 10 100",
"output": "... | 1,529,137,362 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 77 | 0 | def main():
n, m, a, b = input().split(' ')
n = int(n)
m = int(m)
a = int(a)
b = int(b)
mod = n % m
div = n // m
if mod != 0:
if n > m:
plus = ((div+1)*m-n)*a
minus = (n-div*m)*b
ans = min(plus, minus)
elif n < m:
plus = (... | Title: Commentary Boxes
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Berland Football Cup starts really soon! Commentators from all over the world come to the event.
Organizers have already built $n$ commentary boxes. $m$ regional delegations will come to the Cup. Every delegation shou... | ```python
def main():
n, m, a, b = input().split(' ')
n = int(n)
m = int(m)
a = int(a)
b = int(b)
mod = n % m
div = n // m
if mod != 0:
if n > m:
plus = ((div+1)*m-n)*a
minus = (n-div*m)*b
ans = min(plus, minus)
elif n < m:
... | 0 | |
851 | A | Arpa and a research in Mexican wave | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | Arpa is researching the Mexican wave.
There are *n* spectators in the stadium, labeled from 1 to *n*. They start the Mexican wave at time 0.
- At time 1, the first spectator stands. - At time 2, the second spectator stands. - ... - At time *k*, the *k*-th spectator stands. - At time *k*<=+<=1, the (*k*<=+<=1)-t... | The first line contains three integers *n*, *k*, *t* (1<=≤<=*n*<=≤<=109, 1<=≤<=*k*<=≤<=*n*, 1<=≤<=*t*<=<<=*n*<=+<=*k*). | Print single integer: how many spectators are standing at time *t*. | [
"10 5 3\n",
"10 5 7\n",
"10 5 12\n"
] | [
"3\n",
"5\n",
"3\n"
] | In the following a sitting spectator is represented as -, a standing spectator is represented as ^.
- At *t* = 0 ---------- <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/4d97e684117250a9afe9be022ab8a63653dd15aa.png" style="max-width: 100.0%;max-height: 100.0%;"/> number of standing spe... | 500 | [
{
"input": "10 5 3",
"output": "3"
},
{
"input": "10 5 7",
"output": "5"
},
{
"input": "10 5 12",
"output": "3"
},
{
"input": "840585600 770678331 788528791",
"output": "770678331"
},
{
"input": "25462281 23343504 8024619",
"output": "8024619"
},
{
"in... | 1,546,915,933 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 93 | 0 | n,k,t = list(map(int, input().split()))
if t <= k:
print(t)
elif t > k and t <= n:
print(k)
else:
p = t - n
print(p if p >= 0 else 0)
| Title: Arpa and a research in Mexican wave
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Arpa is researching the Mexican wave.
There are *n* spectators in the stadium, labeled from 1 to *n*. They start the Mexican wave at time 0.
- At time 1, the first spectator stands. - At time 2,... | ```python
n,k,t = list(map(int, input().split()))
if t <= k:
print(t)
elif t > k and t <= n:
print(k)
else:
p = t - n
print(p if p >= 0 else 0)
``` | 0 | |
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",
... | 1,696,102,766 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | x = int(input())
a = []
for i in range(x):
y = str(input())
a.append(y)
m = a[0]
o = 0
for i in range(len(a)):
if a[i] != m:
o = a[i]
print(a.count(m)) if (a.count(m) > a.count(o)) else print(a.count(o))
break
if a.count(o) == 0:
print(a.count(m))
| 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
x = int(input())
a = []
for i in range(x):
y = str(input())
a.append(y)
m = a[0]
o = 0
for i in range(len(a)):
if a[i] != m:
o = a[i]
print(a.count(m)) if (a.count(m) > a.count(o)) else print(a.count(o))
break
if a.count(o) == 0:
print(a.count(m))
``` | 0 |
448 | D | Multiplication Table | PROGRAMMING | 1,800 | [
"binary search",
"brute force"
] | null | null | Bizon the Champion isn't just charming, he also is very smart.
While some of us were learning the multiplication table, Bizon the Champion had fun in his own manner. Bizon the Champion painted an *n*<=×<=*m* multiplication table, where the element on the intersection of the *i*-th row and *j*-th column equals *i*·*j* ... | The single line contains integers *n*, *m* and *k* (1<=≤<=*n*,<=*m*<=≤<=5·105; 1<=≤<=*k*<=≤<=*n*·*m*). | Print the *k*-th largest number in a *n*<=×<=*m* multiplication table. | [
"2 2 2\n",
"2 3 4\n",
"1 10 5\n"
] | [
"2\n",
"3\n",
"5\n"
] | A 2 × 3 multiplication table looks like this: | 2,000 | [
{
"input": "2 2 2",
"output": "2"
},
{
"input": "2 3 4",
"output": "3"
},
{
"input": "1 10 5",
"output": "5"
},
{
"input": "1 1 1",
"output": "1"
},
{
"input": "10 1 7",
"output": "7"
},
{
"input": "10 10 33",
"output": "14"
},
{
"input": "... | 1,676,352,000 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 6 | 1,000 | 144,588,800 | import math
n, m, k = input().split(" ")
n = int(n)
m = int(m)
k = int(k)
arr = []
for i in range(n):
for j in range(m):
arr.append((i+1)*(j+1))
arr.sort()
print(arr[k-1])
| Title: Multiplication Table
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Bizon the Champion isn't just charming, he also is very smart.
While some of us were learning the multiplication table, Bizon the Champion had fun in his own manner. Bizon the Champion painted an *n*<=×<=*m* multi... | ```python
import math
n, m, k = input().split(" ")
n = int(n)
m = int(m)
k = int(k)
arr = []
for i in range(n):
for j in range(m):
arr.append((i+1)*(j+1))
arr.sort()
print(arr[k-1])
``` | 0 | |
706 | B | Interesting drink | PROGRAMMING | 1,100 | [
"binary search",
"dp",
"implementation"
] | null | null | Vasiliy likes to rest after a hard work, so you may often meet him in some bar nearby. As all programmers do, he loves the famous drink "Beecola", which can be bought in *n* different shops in the city. It's known that the price of one bottle in the shop *i* is equal to *x**i* coins.
Vasiliy plans to buy his favorite ... | The first line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=100<=000) — the number of shops in the city that sell Vasiliy's favourite drink.
The second line contains *n* integers *x**i* (1<=≤<=*x**i*<=≤<=100<=000) — prices of the bottles of the drink in the *i*-th shop.
The third line contains a single i... | Print *q* integers. The *i*-th of them should be equal to the number of shops where Vasiliy will be able to buy a bottle of the drink on the *i*-th day. | [
"5\n3 10 8 6 11\n4\n1\n10\n3\n11\n"
] | [
"0\n4\n1\n5\n"
] | On the first day, Vasiliy won't be able to buy a drink in any of the shops.
On the second day, Vasiliy can buy a drink in the shops 1, 2, 3 and 4.
On the third day, Vasiliy can buy a drink only in the shop number 1.
Finally, on the last day Vasiliy can buy a drink in any shop. | 1,000 | [
{
"input": "5\n3 10 8 6 11\n4\n1\n10\n3\n11",
"output": "0\n4\n1\n5"
},
{
"input": "5\n868 987 714 168 123\n10\n424\n192\n795\n873\n117\n914\n735\n158\n631\n471",
"output": "2\n2\n3\n4\n0\n4\n3\n1\n2\n2"
},
{
"input": "3\n435 482 309\n7\n245\n241\n909\n745\n980\n29\n521",
"output": "... | 1,689,134,250 | 2,147,483,647 | PyPy 3-64 | RUNTIME_ERROR | TESTS | 0 | 92 | 3,276,800 | def count_shops(n, xi, q, mi):
xi.sort()
result = []
for i in range(q):
coins = mi[i]
shops = bisect_right(xi, coins)
result.append(shops)
return result
n = int(input())
xi = list(map(int, input().split()))
q = int(input())
mi = []
for i in range(q):
mi.append(int(inp... | Title: Interesting drink
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasiliy likes to rest after a hard work, so you may often meet him in some bar nearby. As all programmers do, he loves the famous drink "Beecola", which can be bought in *n* different shops in the city. It's known tha... | ```python
def count_shops(n, xi, q, mi):
xi.sort()
result = []
for i in range(q):
coins = mi[i]
shops = bisect_right(xi, coins)
result.append(shops)
return result
n = int(input())
xi = list(map(int, input().split()))
q = int(input())
mi = []
for i in range(q):
mi.appe... | -1 | |
817 | A | Treasure Hunt | PROGRAMMING | 1,200 | [
"implementation",
"math",
"number theory"
] | null | null | Captain Bill the Hummingbird and his crew recieved an interesting challenge offer. Some stranger gave them a map, potion of teleportation and said that only this potion might help them to reach the treasure.
Bottle with potion has two values *x* and *y* written on it. These values define four moves which can be perfo... | The first line contains four integer numbers *x*1,<=*y*1,<=*x*2,<=*y*2 (<=-<=105<=≤<=*x*1,<=*y*1,<=*x*2,<=*y*2<=≤<=105) — positions of Captain Bill the Hummingbird and treasure respectively.
The second line contains two integer numbers *x*,<=*y* (1<=≤<=*x*,<=*y*<=≤<=105) — values on the potion bottle. | Print "YES" if it is possible for Captain to reach the treasure using the potion, otherwise print "NO" (without quotes). | [
"0 0 0 6\n2 3\n",
"1 1 3 6\n1 5\n"
] | [
"YES\n",
"NO\n"
] | In the first example there exists such sequence of moves:
1. <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/7c939890fb4ed35688177327dac981bfa9216c00.png" style="max-width: 100.0%;max-height: 100.0%;"/> — the first type of move 1. <img align="middle" class="tex-formula" src="https://espr... | 0 | [
{
"input": "0 0 0 6\n2 3",
"output": "YES"
},
{
"input": "1 1 3 6\n1 5",
"output": "NO"
},
{
"input": "5 4 6 -10\n1 1",
"output": "NO"
},
{
"input": "6 -3 -7 -7\n1 2",
"output": "NO"
},
{
"input": "2 -5 -8 8\n2 1",
"output": "YES"
},
{
"input": "70 -81... | 1,689,740,334 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 61 | 77 | 0 | x1,y1,x2,y2=map(int,input().split())
x,y=map(int,input().split())
if ((x2-x1)/x%2)==((y2-y1)/y%2) and (x2-x1)%x==0 and (y2-y1)%y==0:
print('Yes')
else:
print('No') | Title: Treasure Hunt
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Captain Bill the Hummingbird and his crew recieved an interesting challenge offer. Some stranger gave them a map, potion of teleportation and said that only this potion might help them to reach the treasure.
Bottle with... | ```python
x1,y1,x2,y2=map(int,input().split())
x,y=map(int,input().split())
if ((x2-x1)/x%2)==((y2-y1)/y%2) and (x2-x1)%x==0 and (y2-y1)%y==0:
print('Yes')
else:
print('No')
``` | 3 | |
991 | A | If at first you don't succeed... | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | Each student eagerly awaits the day he would pass the exams successfully. Thus, Vasya was ready to celebrate, but, alas, he didn't pass it. However, many of Vasya's fellow students from the same group were more successful and celebrated after the exam.
Some of them celebrated in the BugDonalds restaurant, some of them... | The first line contains four integers — $A$, $B$, $C$ and $N$ ($0 \leq A, B, C, N \leq 100$). | If a distribution of $N$ students exists in which $A$ students visited BugDonalds, $B$ — BeaverKing, $C$ — both of the restaurants and at least one student is left home (it is known that Vasya didn't pass the exam and stayed at home), output one integer — amount of students (including Vasya) who did not pass the exam. ... | [
"10 10 5 20\n",
"2 2 0 4\n",
"2 2 2 1\n"
] | [
"5",
"-1",
"-1"
] | The first sample describes following situation: $5$ only visited BugDonalds, $5$ students only visited BeaverKing, $5$ visited both of them and $5$ students (including Vasya) didn't pass the exam.
In the second sample $2$ students only visited BugDonalds and $2$ only visited BeaverKing, but that means all $4$ students... | 500 | [
{
"input": "10 10 5 20",
"output": "5"
},
{
"input": "2 2 0 4",
"output": "-1"
},
{
"input": "2 2 2 1",
"output": "-1"
},
{
"input": "98 98 97 100",
"output": "1"
},
{
"input": "1 5 2 10",
"output": "-1"
},
{
"input": "5 1 2 10",
"output": "-1"
}... | 1,570,108,870 | 2,147,483,647 | Python 3 | OK | TESTS | 76 | 139 | 0 | a,b,c,t=list(map(int,input().split()))
if t<=a+b-c or c>a or c>b: print(-1)
else: print(t-a-b+c) | Title: If at first you don't succeed...
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Each student eagerly awaits the day he would pass the exams successfully. Thus, Vasya was ready to celebrate, but, alas, he didn't pass it. However, many of Vasya's fellow students from the same group w... | ```python
a,b,c,t=list(map(int,input().split()))
if t<=a+b-c or c>a or c>b: print(-1)
else: print(t-a-b+c)
``` | 3 | |
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": "... | 1,626,628,714 | 2,147,483,647 | PyPy 3 | OK | TESTS | 102 | 109 | 20,172,800 | k = list(map(int, input()))
p = list(map(int, input()))
A = []
for i in range (len(k)):
if k[i] == p[i]:
A.append(0)
else:
A.append(1)
print(*A, sep='') | 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
k = list(map(int, input()))
p = list(map(int, input()))
A = []
for i in range (len(k)):
if k[i] == p[i]:
A.append(0)
else:
A.append(1)
print(*A, sep='')
``` | 3.935175 |
300 | A | Array | PROGRAMMING | 1,100 | [
"brute force",
"constructive algorithms",
"implementation"
] | null | null | Vitaly has an array of *n* distinct integers. Vitaly wants to divide this array into three non-empty sets so as the following conditions hold:
1. The product of all numbers in the first set is less than zero (<=<<=0). 1. The product of all numbers in the second set is greater than zero (<=><=0). 1. The produ... | The first line of the input contains integer *n* (3<=≤<=*n*<=≤<=100). The second line contains *n* space-separated distinct integers *a*1,<=*a*2,<=...,<=*a**n* (|*a**i*|<=≤<=103) — the array elements. | In the first line print integer *n*1 (*n*1<=><=0) — the number of elements in the first set. Then print *n*1 numbers — the elements that got to the first set.
In the next line print integer *n*2 (*n*2<=><=0) — the number of elements in the second set. Then print *n*2 numbers — the elements that got to the second... | [
"3\n-1 2 0\n",
"4\n-1 -2 -3 0\n"
] | [
"1 -1\n1 2\n1 0\n",
"1 -1\n2 -3 -2\n1 0\n"
] | none | 500 | [
{
"input": "3\n-1 2 0",
"output": "1 -1\n1 2\n1 0"
},
{
"input": "4\n-1 -2 -3 0",
"output": "1 -1\n2 -3 -2\n1 0"
},
{
"input": "5\n-1 -2 1 2 0",
"output": "1 -1\n2 1 2\n2 0 -2"
},
{
"input": "100\n-64 -51 -75 -98 74 -26 -1 -8 -99 -76 -53 -80 -43 -22 -100 -62 -34 -5 -65 -81 -1... | 1,618,764,447 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 92 | 0 | n = int(input())
a = list(map(int, input().split()))
am = []
duong = []
zero = []
for i in a:
if i < 0:
am.append(i)
elif i > 0:
duong.append(i)
else:
zero.append(i)
if len(am) != 0:
print(len(am), *am)
if len(duong) != 0:
print(len(duong), *duong)
if len(zero... | Title: Array
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vitaly has an array of *n* distinct integers. Vitaly wants to divide this array into three non-empty sets so as the following conditions hold:
1. The product of all numbers in the first set is less than zero (<=<<=0). 1. T... | ```python
n = int(input())
a = list(map(int, input().split()))
am = []
duong = []
zero = []
for i in a:
if i < 0:
am.append(i)
elif i > 0:
duong.append(i)
else:
zero.append(i)
if len(am) != 0:
print(len(am), *am)
if len(duong) != 0:
print(len(duong), *duong)
i... | 0 | |
893 | C | Rumor | PROGRAMMING | 1,300 | [
"dfs and similar",
"graphs",
"greedy"
] | null | null | Vova promised himself that he would never play computer games... But recently Firestorm — a well-known game developing company — published their newest game, World of Farcraft, and it became really popular. Of course, Vova started playing it.
Now he tries to solve a quest. The task is to come to a settlement named Ove... | The first line contains two integer numbers *n* and *m* (1<=≤<=*n*<=≤<=105,<=0<=≤<=*m*<=≤<=105) — the number of characters in Overcity and the number of pairs of friends.
The second line contains *n* integer numbers *c**i* (0<=≤<=*c**i*<=≤<=109) — the amount of gold *i*-th character asks to start spreading the rumor.
... | Print one number — the minimum amount of gold Vova has to spend in order to finish the quest. | [
"5 2\n2 5 3 4 8\n1 4\n4 5\n",
"10 0\n1 2 3 4 5 6 7 8 9 10\n",
"10 5\n1 6 2 7 3 8 4 9 5 10\n1 2\n3 4\n5 6\n7 8\n9 10\n"
] | [
"10\n",
"55\n",
"15\n"
] | In the first example the best decision is to bribe the first character (he will spread the rumor to fourth character, and the fourth one will spread it to fifth). Also Vova has to bribe the second and the third characters, so they know the rumor.
In the second example Vova has to bribe everyone.
In the third example ... | 0 | [
{
"input": "5 2\n2 5 3 4 8\n1 4\n4 5",
"output": "10"
},
{
"input": "10 0\n1 2 3 4 5 6 7 8 9 10",
"output": "55"
},
{
"input": "10 5\n1 6 2 7 3 8 4 9 5 10\n1 2\n3 4\n5 6\n7 8\n9 10",
"output": "15"
},
{
"input": "1 0\n0",
"output": "0"
},
{
"input": "1 0\n10000000... | 1,665,562,609 | 2,147,483,647 | PyPy 3-64 | RUNTIME_ERROR | TESTS | 3 | 264 | 27,852,800 | import sys, heapq
from collections import defaultdict
input = sys.stdin.readline
def dfs(current, graph, seen):
seen.add(current)
for neigh in graph[current]:
if neigh not in seen:
dfs(neigh, graph, seen)
def main():
n, m = list(map(int, input().split()))
costs = list(map(int, inp... | Title: Rumor
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vova promised himself that he would never play computer games... But recently Firestorm — a well-known game developing company — published their newest game, World of Farcraft, and it became really popular. Of course, Vova starte... | ```python
import sys, heapq
from collections import defaultdict
input = sys.stdin.readline
def dfs(current, graph, seen):
seen.add(current)
for neigh in graph[current]:
if neigh not in seen:
dfs(neigh, graph, seen)
def main():
n, m = list(map(int, input().split()))
costs = list(ma... | -1 | |
446 | A | DZY Loves Sequences | PROGRAMMING | 1,600 | [
"dp",
"implementation",
"two pointers"
] | null | null | DZY has a sequence *a*, consisting of *n* integers.
We'll call a sequence *a**i*,<=*a**i*<=+<=1,<=...,<=*a**j* (1<=≤<=*i*<=≤<=*j*<=≤<=*n*) a subsegment of the sequence *a*. The value (*j*<=-<=*i*<=+<=1) denotes the length of the subsegment.
Your task is to find the longest subsegment of *a*, such that it is possible ... | The first line contains integer *n* (1<=≤<=*n*<=≤<=105). The next line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=109). | In a single line print the answer to the problem — the maximum length of the required subsegment. | [
"6\n7 2 3 1 5 6\n"
] | [
"5\n"
] | You can choose subsegment *a*<sub class="lower-index">2</sub>, *a*<sub class="lower-index">3</sub>, *a*<sub class="lower-index">4</sub>, *a*<sub class="lower-index">5</sub>, *a*<sub class="lower-index">6</sub> and change its 3rd element (that is *a*<sub class="lower-index">4</sub>) to 4. | 500 | [
{
"input": "6\n7 2 3 1 5 6",
"output": "5"
},
{
"input": "10\n424238336 649760493 681692778 714636916 719885387 804289384 846930887 957747794 596516650 189641422",
"output": "9"
},
{
"input": "50\n804289384 846930887 681692778 714636916 957747794 424238336 719885387 649760493 596516650 1... | 1,549,915,368 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 93 | 0 | n = int(input())
vec = list(map(int, input().split()))
status = [1] * (n + 1)
for i in range(1, n):
if vec[i] > vec[i - 1]:
status[i] = status[i - 1] + 1
far = [1] * (n + 1)
cur = status[n - 1]
for i in range(n - 2, -1, -1):
if vec[i] < vec[i + 1]:
far[i] += cur - status[i]
else:
... | Title: DZY Loves Sequences
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
DZY has a sequence *a*, consisting of *n* integers.
We'll call a sequence *a**i*,<=*a**i*<=+<=1,<=...,<=*a**j* (1<=≤<=*i*<=≤<=*j*<=≤<=*n*) a subsegment of the sequence *a*. The value (*j*<=-<=*i*<=+<=1) denotes the... | ```python
n = int(input())
vec = list(map(int, input().split()))
status = [1] * (n + 1)
for i in range(1, n):
if vec[i] > vec[i - 1]:
status[i] = status[i - 1] + 1
far = [1] * (n + 1)
cur = status[n - 1]
for i in range(n - 2, -1, -1):
if vec[i] < vec[i + 1]:
far[i] += cur - status[i]
... | 0 | |
20 | C | Dijkstra? | PROGRAMMING | 1,900 | [
"graphs",
"shortest paths"
] | C. Dijkstra? | 1 | 64 | You are given a weighted undirected graph. The vertices are enumerated from 1 to *n*. Your task is to find the shortest path between the vertex 1 and the vertex *n*. | The first line contains two integers *n* and *m* (2<=≤<=*n*<=≤<=105,<=0<=≤<=*m*<=≤<=105), where *n* is the number of vertices and *m* is the number of edges. Following *m* lines contain one edge each in form *a**i*, *b**i* and *w**i* (1<=≤<=*a**i*,<=*b**i*<=≤<=*n*,<=1<=≤<=*w**i*<=≤<=106), where *a**i*,<=*b**i* are edge... | Write the only integer -1 in case of no path. Write the shortest path in opposite case. If there are many solutions, print any of them. | [
"5 6\n1 2 2\n2 5 5\n2 3 4\n1 4 1\n4 3 3\n3 5 1\n",
"5 6\n1 2 2\n2 5 5\n2 3 4\n1 4 1\n4 3 3\n3 5 1\n"
] | [
"1 4 3 5 ",
"1 4 3 5 "
] | none | 1,500 | [
{
"input": "5 6\n1 2 2\n2 5 5\n2 3 4\n1 4 1\n4 3 3\n3 5 1",
"output": "1 4 3 5 "
},
{
"input": "5 6\n1 2 2\n2 5 5\n2 3 4\n1 4 1\n4 3 3\n3 5 1",
"output": "1 4 3 5 "
},
{
"input": "2 1\n1 2 1",
"output": "1 2 "
},
{
"input": "3 1\n1 2 1",
"output": "-1"
},
{
"input... | 1,600,240,925 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 6 | 93 | 307,200 | from heapq import heappush, heappop
push = lambda pq, node: heappush(pq, (node[1], node[0], node[2]))
pop = lambda pq: heappop(pq)
n, m = map(int, input().split())
adj = {x+1:dict() for x in range(n)}
for i in range(m):
a, b, w = map(int, input().split())
adj[a][b] = w
adj[b][a] = w
infinity ... | Title: Dijkstra?
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
You are given a weighted undirected graph. The vertices are enumerated from 1 to *n*. Your task is to find the shortest path between the vertex 1 and the vertex *n*.
Input Specification:
The first line contains two integers *n* a... | ```python
from heapq import heappush, heappop
push = lambda pq, node: heappush(pq, (node[1], node[0], node[2]))
pop = lambda pq: heappop(pq)
n, m = map(int, input().split())
adj = {x+1:dict() for x in range(n)}
for i in range(m):
a, b, w = map(int, input().split())
adj[a][b] = w
adj[b][a] = w
... | 0 |
840 | E | In a Trap | PROGRAMMING | 3,200 | [
"trees"
] | null | null | Lech got into a tree consisting of *n* vertices with a root in vertex number 1. At each vertex *i* written integer *a**i*. He will not get out until he answers *q* queries of the form *u* *v*. Answer for the query is maximal value among all vertices *i* on path from *u* to *v* including *u* and *v*, where *dist*(*i*,<... | First line of input data contains two integers *n* and *q* (1<=≤<=*n*<=≤<=5·104, 1<=≤<=*q*<=≤<=150<=000) — number of vertices in the tree and number of queries respectively.
Next line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (0<=≤<=*a**i*<=≤<=*n*) — numbers on vertices.
Each of next *n*<=-<=1 lines contains t... | Output *q* lines — answers for a queries. | [
"5 3\n0 3 2 1 4\n1 2\n2 3\n3 4\n3 5\n1 4\n1 5\n2 4\n",
"5 4\n1 2 3 4 5\n1 2\n2 3\n3 4\n4 5\n1 5\n2 5\n1 4\n3 3\n"
] | [
"3\n4\n3\n",
"5\n5\n4\n3\n"
] | none | 2,500 | [] | 1,692,454,106 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 0 | 46 | 0 | print("_RANDOM_GUESS_1692454106.4938278")# 1692454106.4938452 | Title: In a Trap
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Lech got into a tree consisting of *n* vertices with a root in vertex number 1. At each vertex *i* written integer *a**i*. He will not get out until he answers *q* queries of the form *u* *v*. Answer for the query is maximal ... | ```python
print("_RANDOM_GUESS_1692454106.4938278")# 1692454106.4938452
``` | 0 | |
698 | A | Vacations | PROGRAMMING | 1,400 | [
"dp"
] | null | null | Vasya has *n* days of vacations! So he decided to improve his IT skills and do sport. Vasya knows the following information about each of this *n* days: whether that gym opened and whether a contest was carried out in the Internet on that day. For the *i*-th day there are four options:
1. on this day the gym is close... | The first line contains a positive integer *n* (1<=≤<=*n*<=≤<=100) — the number of days of Vasya's vacations.
The second line contains the sequence of integers *a*1,<=*a*2,<=...,<=*a**n* (0<=≤<=*a**i*<=≤<=3) separated by space, where:
- *a**i* equals 0, if on the *i*-th day of vacations the gym is closed and the co... | Print the minimum possible number of days on which Vasya will have a rest. Remember that Vasya refuses:
- to do sport on any two consecutive days, - to write the contest on any two consecutive days. | [
"4\n1 3 2 0\n",
"7\n1 3 3 2 1 2 3\n",
"2\n2 2\n"
] | [
"2\n",
"0\n",
"1\n"
] | In the first test Vasya can write the contest on the day number 1 and do sport on the day number 3. Thus, he will have a rest for only 2 days.
In the second test Vasya should write contests on days number 1, 3, 5 and 7, in other days do sport. Thus, he will not have a rest for a single day.
In the third test Vasya ca... | 500 | [
{
"input": "4\n1 3 2 0",
"output": "2"
},
{
"input": "7\n1 3 3 2 1 2 3",
"output": "0"
},
{
"input": "2\n2 2",
"output": "1"
},
{
"input": "1\n0",
"output": "1"
},
{
"input": "10\n0 0 1 1 0 0 0 0 1 0",
"output": "8"
},
{
"input": "100\n3 2 3 3 3 2 3 1 ... | 1,592,825,134 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 5 | 124 | 0 | import os
import sys
debug = True
if debug and os.path.exists("input.in"):
input = open("input.in", "r").readline
else:
debug = False
input = sys.stdin.readline
def inp():
return (int(input()))
def inlt():
return (list(map(int, input().split())))
def insr():
s = in... | Title: Vacations
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya has *n* days of vacations! So he decided to improve his IT skills and do sport. Vasya knows the following information about each of this *n* days: whether that gym opened and whether a contest was carried out in the Int... | ```python
import os
import sys
debug = True
if debug and os.path.exists("input.in"):
input = open("input.in", "r").readline
else:
debug = False
input = sys.stdin.readline
def inp():
return (int(input()))
def inlt():
return (list(map(int, input().split())))
def insr():
... | 0 | |
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... | 1,621,835,961 | 2,147,483,647 | Python 3 | OK | TESTS | 34 | 62 | 0 | n=int(input())
SorF=input()
SorF=SorF.upper()
cntofF=0
cntofS=0
for i in range(len(SorF)-1):
if SorF[i]!=SorF[i+1]:
if SorF[i]=='S':
cntofF+=1
else:
cntofS+=1
if cntofF<=cntofS:
print("NO")
else:
print("YES") | 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())
SorF=input()
SorF=SorF.upper()
cntofF=0
cntofS=0
for i in range(len(SorF)-1):
if SorF[i]!=SorF[i+1]:
if SorF[i]=='S':
cntofF+=1
else:
cntofS+=1
if cntofF<=cntofS:
print("NO")
else:
print("YES")
``` | 3 | |
721 | A | One-dimensional Japanese Crossword | PROGRAMMING | 800 | [
"implementation"
] | null | null | Recently Adaltik discovered japanese crosswords. Japanese crossword is a picture, represented as a table sized *a*<=×<=*b* squares, and each square is colored white or black. There are integers to the left of the rows and to the top of the columns, encrypting the corresponding row or column. The number of integers repr... | The first line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=100) — the length of the row. The second line of the input contains a single string consisting of *n* characters 'B' or 'W', ('B' corresponds to black square, 'W' — to white square in the row that Adaltik drew). | The first line should contain a single integer *k* — the number of integers encrypting the row, e.g. the number of groups of black squares in the row.
The second line should contain *k* integers, encrypting the row, e.g. corresponding to sizes of groups of consecutive black squares in the order from left to right. | [
"3\nBBW\n",
"5\nBWBWB\n",
"4\nWWWW\n",
"4\nBBBB\n",
"13\nWBBBBWWBWBBBW\n"
] | [
"1\n2 ",
"3\n1 1 1 ",
"0\n",
"1\n4 ",
"3\n4 1 3 "
] | The last sample case correspond to the picture in the statement. | 500 | [
{
"input": "3\nBBW",
"output": "1\n2 "
},
{
"input": "5\nBWBWB",
"output": "3\n1 1 1 "
},
{
"input": "4\nWWWW",
"output": "0"
},
{
"input": "4\nBBBB",
"output": "1\n4 "
},
{
"input": "13\nWBBBBWWBWBBBW",
"output": "3\n4 1 3 "
},
{
"input": "1\nB",
... | 1,577,259,482 | 2,147,483,647 | PyPy 3 | OK | TESTS | 54 | 140 | 0 | n=int(input())
s=str(input())
p=0;s+='1'
arr=[]
for i in s:
if i=='B':
p+=1
else:
if p!=0:
arr.append(p)
p=0
print(len(arr))
for i in range(len(arr)):
print(arr[i],end=' ') | Title: One-dimensional Japanese Crossword
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Recently Adaltik discovered japanese crosswords. Japanese crossword is a picture, represented as a table sized *a*<=×<=*b* squares, and each square is colored white or black. There are integers to the... | ```python
n=int(input())
s=str(input())
p=0;s+='1'
arr=[]
for i in s:
if i=='B':
p+=1
else:
if p!=0:
arr.append(p)
p=0
print(len(arr))
for i in range(len(arr)):
print(arr[i],end=' ')
``` | 3 | |
699 | A | Launch of Collider | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | There will be a launch of a new, powerful and unusual collider very soon, which located along a straight line. *n* particles will be launched inside it. All of them are located in a straight line and there can not be two or more particles located in the same point. The coordinates of the particles coincide with the dis... | The first line contains the positive integer *n* (1<=≤<=*n*<=≤<=200<=000) — the number of particles.
The second line contains *n* symbols "L" and "R". If the *i*-th symbol equals "L", then the *i*-th particle will move to the left, otherwise the *i*-th symbol equals "R" and the *i*-th particle will move to the right.... | In the first line print the only integer — the first moment (in microseconds) when two particles are at the same point and there will be an explosion.
Print the only integer -1, if the collision of particles doesn't happen. | [
"4\nRLRL\n2 4 6 10\n",
"3\nLLR\n40 50 60\n"
] | [
"1\n",
"-1\n"
] | In the first sample case the first explosion will happen in 1 microsecond because the particles number 1 and 2 will simultaneously be at the same point with the coordinate 3.
In the second sample case there will be no explosion because there are no particles which will simultaneously be at the same point. | 500 | [
{
"input": "4\nRLRL\n2 4 6 10",
"output": "1"
},
{
"input": "3\nLLR\n40 50 60",
"output": "-1"
},
{
"input": "4\nRLLR\n46 230 264 470",
"output": "92"
},
{
"input": "6\nLLRLLL\n446 492 650 844 930 970",
"output": "97"
},
{
"input": "8\nRRLLLLLL\n338 478 512 574 59... | 1,477,058,990 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | n = int(input())
moves = input()
positions = list(map(int, input().split(' ')))
ans = 10 ** 9
for i in range(n-1):
if moves[i] = 'R' and moves[i+1] = 'L':
ans = min(ans, (positions[i+1] - positions[i]) // 2)
if ans == 10 ** 9:
print(-1)
else:
print(ans)
| Title: Launch of Collider
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There will be a launch of a new, powerful and unusual collider very soon, which located along a straight line. *n* particles will be launched inside it. All of them are located in a straight line and there can not be... | ```python
n = int(input())
moves = input()
positions = list(map(int, input().split(' ')))
ans = 10 ** 9
for i in range(n-1):
if moves[i] = 'R' and moves[i+1] = 'L':
ans = min(ans, (positions[i+1] - positions[i]) // 2)
if ans == 10 ** 9:
print(-1)
else:
print(ans)
``` | -1 | |
839 | C | Journey | PROGRAMMING | 1,500 | [
"dfs and similar",
"dp",
"graphs",
"probabilities",
"trees"
] | null | null | There are *n* cities and *n*<=-<=1 roads in the Seven Kingdoms, each road connects two cities and we can reach any city from any other by the roads.
Theon and Yara Greyjoy are on a horse in the first city, they are starting traveling through the roads. But the weather is foggy, so they can’t see where the horse brings... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=100000) — number of cities.
Then *n*<=-<=1 lines follow. The *i*-th line of these lines contains two integers *u**i* and *v**i* (1<=≤<=*u**i*,<=*v**i*<=≤<=*n*, *u**i*<=≠<=*v**i*) — the cities connected by the *i*-th road.
It is guaranteed that one can reach ... | Print a number — the expected length of their journey. The journey starts in the city 1.
Your answer will be considered correct if its absolute or relative error does not exceed 10<=-<=6.
Namely: let's assume that your answer is *a*, and the answer of the jury is *b*. The checker program will consider your answer cor... | [
"4\n1 2\n1 3\n2 4\n",
"5\n1 2\n1 3\n3 4\n2 5\n"
] | [
"1.500000000000000\n",
"2.000000000000000\n"
] | In the first sample, their journey may end in cities 3 or 4 with equal probability. The distance to city 3 is 1 and to city 4 is 2, so the expected length is 1.5.
In the second sample, their journey may end in city 4 or 5. The distance to the both cities is 2, so the expected length is 2. | 1,500 | [
{
"input": "4\n1 2\n1 3\n2 4",
"output": "1.500000000000000"
},
{
"input": "5\n1 2\n1 3\n3 4\n2 5",
"output": "2.000000000000000"
},
{
"input": "70\n1 25\n57 1\n18 1\n65 1\n38 1\n1 41\n1 5\n1 69\n1 3\n31 1\n1 8\n1 9\n53 1\n70 1\n45 1\n1 24\n1 42\n1 30\n1 12\n1 37\n64 1\n1 28\n1 58\n1 22\... | 1,584,523,013 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 38 | 1,076 | 31,129,600 | import sys
n = int(input())
d = {}
for _ in range(n-1):
a,b = map(int,input().split())
if a not in d:
d[a]=set()
d[a].add(b)
if b not in d:
d[b]=set()
d[b].add(a)
x = [None]*(n+1)
for node in d:
if len(d[node])==1 and node!=1:
x[node]=0
done = False
visited = [None... | Title: Journey
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There are *n* cities and *n*<=-<=1 roads in the Seven Kingdoms, each road connects two cities and we can reach any city from any other by the roads.
Theon and Yara Greyjoy are on a horse in the first city, they are starting tr... | ```python
import sys
n = int(input())
d = {}
for _ in range(n-1):
a,b = map(int,input().split())
if a not in d:
d[a]=set()
d[a].add(b)
if b not in d:
d[b]=set()
d[b].add(a)
x = [None]*(n+1)
for node in d:
if len(d[node])==1 and node!=1:
x[node]=0
done = False
visit... | -1 | |
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": "... | 1,657,615,956 | 2,147,483,647 | PyPy 3 | OK | TESTS | 102 | 78 | 0 | t = input()
n = input()
a = len(t)
ans = ''
for i in range(a):
if t[i] == n[i]:
ans += '0'
else:
ans += '1'
print(ans) | 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
t = input()
n = input()
a = len(t)
ans = ''
for i in range(a):
if t[i] == n[i]:
ans += '0'
else:
ans += '1'
print(ans)
``` | 3.9805 |
690 | F1 | Tree of Life (easy) | PROGRAMMING | 1,300 | [] | null | null | Heidi has finally found the mythical Tree of Life – a legendary combinatorial structure which is said to contain a prophecy crucially needed to defeat the undead armies.
On the surface, the Tree of Life is just a regular undirected tree well-known from computer science. This means that it is a collection of *n* points... | The first line of the input contains a single integer *n* – the number of vertices in the tree (1<=≤<=*n*<=≤<=10000). The vertices are labeled with the numbers from 1 to *n*. Then *n*<=-<=1 lines follow, each describing one edge using two space-separated numbers *a* *b* – the labels of the vertices connected by the edg... | Print one integer – the number of lifelines in the tree. | [
"4\n1 2\n1 3\n1 4\n",
"5\n1 2\n2 3\n3 4\n3 5\n"
] | [
"3",
"4"
] | In the second sample, there are four lifelines: paths between vertices 1 and 3, 2 and 4, 2 and 5, and 4 and 5. | 0 | [
{
"input": "4\n1 2\n1 3\n1 4",
"output": "3"
},
{
"input": "5\n1 2\n2 3\n3 4\n3 5",
"output": "4"
},
{
"input": "2\n1 2",
"output": "0"
},
{
"input": "3\n2 1\n3 2",
"output": "1"
},
{
"input": "10\n5 1\n1 2\n9 3\n10 5\n6 3\n8 5\n2 7\n2 3\n9 4",
"output": "11"
... | 1,468,142,500 | 4,900 | Python 3 | OK | TESTS | 19 | 78 | 102,400 | n = int(input())
a = [0]*(n+1)
for _ in range(n-1):
x, y = input().split(' ')
x, y = [int(x), int(y)]
a[x] += 1
a[y] += 1
to = 0
for x in a:
to += (x * (x-1))//2
print(to) | Title: Tree of Life (easy)
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Heidi has finally found the mythical Tree of Life – a legendary combinatorial structure which is said to contain a prophecy crucially needed to defeat the undead armies.
On the surface, the Tree of Life is just a r... | ```python
n = int(input())
a = [0]*(n+1)
for _ in range(n-1):
x, y = input().split(' ')
x, y = [int(x), int(y)]
a[x] += 1
a[y] += 1
to = 0
for x in a:
to += (x * (x-1))//2
print(to)
``` | 3 | |
490 | A | Team Olympiad | PROGRAMMING | 800 | [
"greedy",
"implementation",
"sortings"
] | null | null | The School №0 of the capital of Berland has *n* children studying in it. All the children in this school are gifted: some of them are good at programming, some are good at maths, others are good at PE (Physical Education). Hence, for each child we know value *t**i*:
- *t**i*<==<=1, if the *i*-th child is good at prog... | The first line contains integer *n* (1<=≤<=*n*<=≤<=5000) — the number of children in the school. The second line contains *n* integers *t*1,<=*t*2,<=...,<=*t**n* (1<=≤<=*t**i*<=≤<=3), where *t**i* describes the skill of the *i*-th child. | In the first line output integer *w* — the largest possible number of teams.
Then print *w* lines, containing three numbers in each line. Each triple represents the indexes of the children forming the team. You can print both the teams, and the numbers in the triplets in any order. The children are numbered from 1 to... | [
"7\n1 3 1 3 2 1 2\n",
"4\n2 1 1 2\n"
] | [
"2\n3 5 2\n6 7 4\n",
"0\n"
] | none | 500 | [
{
"input": "7\n1 3 1 3 2 1 2",
"output": "2\n3 5 2\n6 7 4"
},
{
"input": "4\n2 1 1 2",
"output": "0"
},
{
"input": "1\n2",
"output": "0"
},
{
"input": "2\n3 1",
"output": "0"
},
{
"input": "3\n2 1 2",
"output": "0"
},
{
"input": "3\n1 2 3",
"output... | 1,682,938,203 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 31 | 0 | num = int(input())
list_stud = input().split()
prog = list_stud.count('1')
math = list_stud.count('1')
pe = list_stud.count('1')
print(min(prog,pe,math))
| Title: Team Olympiad
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The School №0 of the capital of Berland has *n* children studying in it. All the children in this school are gifted: some of them are good at programming, some are good at maths, others are good at PE (Physical Education)... | ```python
num = int(input())
list_stud = input().split()
prog = list_stud.count('1')
math = list_stud.count('1')
pe = list_stud.count('1')
print(min(prog,pe,math))
``` | 0 | |
213 | A | Game | PROGRAMMING | 1,700 | [
"dfs and similar",
"greedy"
] | null | null | Furik and Rubik love playing computer games. Furik has recently found a new game that greatly interested Rubik. The game consists of *n* parts and to complete each part a player may probably need to complete some other ones. We know that the game can be fully completed, that is, its parts do not form cyclic dependencie... | The first line contains integer *n* (1<=≤<=*n*<=≤<=200) — the number of game parts. The next line contains *n* integers, the *i*-th integer — *c**i* (1<=≤<=*c**i*<=≤<=3) represents the number of the computer, on which you can complete the game part number *i*.
Next *n* lines contain descriptions of game parts. The *i... | On a single line print the answer to the problem. | [
"1\n1\n0\n",
"5\n2 2 1 1 3\n1 5\n2 5 1\n2 5 4\n1 5\n0\n"
] | [
"1\n",
"7\n"
] | Note to the second sample: before the beginning of the game the best strategy is to stand by the third computer. First we complete part 5. Then we go to the 1-st computer and complete parts 3 and 4. Then we go to the 2-nd computer and complete parts 1 and 2. In total we get 1+1+2+1+2, which equals 7 hours. | 1,000 | [
{
"input": "1\n1\n0",
"output": "1"
},
{
"input": "5\n2 2 1 1 3\n1 5\n2 5 1\n2 5 4\n1 5\n0",
"output": "7"
},
{
"input": "7\n1 3 3 1 2 1 1\n0\n1 1\n1 1\n2 1 6\n3 1 2 7\n1 1\n1 1",
"output": "11"
},
{
"input": "2\n2 1\n0\n1 1",
"output": "4"
},
{
"input": "3\n2 1 2... | 1,664,405,084 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 186 | 0 | problems = int(input())
n = []
sure = 0
for i in range(problems):
n.append(input())
for i in range(problems):
if n[0].count('1') >= 2:
sure += 1
n = n[1:]
print(sure) | Title: Game
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Furik and Rubik love playing computer games. Furik has recently found a new game that greatly interested Rubik. The game consists of *n* parts and to complete each part a player may probably need to complete some other ones. We kn... | ```python
problems = int(input())
n = []
sure = 0
for i in range(problems):
n.append(input())
for i in range(problems):
if n[0].count('1') >= 2:
sure += 1
n = n[1:]
print(sure)
``` | 0 | |
965 | B | Battleship | PROGRAMMING | 1,300 | [
"implementation"
] | null | null | Arkady is playing Battleship. The rules of this game aren't really important.
There is a field of $n \times n$ cells. There should be exactly one $k$-decker on the field, i. e. a ship that is $k$ cells long oriented either horizontally or vertically. However, Arkady doesn't know where it is located. For each cell Arka... | The first line contains two integers $n$ and $k$ ($1 \le k \le n \le 100$) — the size of the field and the size of the ship.
The next $n$ lines contain the field. Each line contains $n$ characters, each of which is either '#' (denotes a definitely empty cell) or '.' (denotes a cell that can belong to the ship). | Output two integers — the row and the column of a cell that belongs to the maximum possible number of different locations of the ship.
If there are multiple answers, output any of them. In particular, if no ship can be placed on the field, you can output any cell. | [
"4 3\n#..#\n#.#.\n....\n.###\n",
"10 4\n#....##...\n.#...#....\n..#..#..#.\n...#.#....\n.#..##.#..\n.....#...#\n...#.##...\n.#...#.#..\n.....#..#.\n...#.#...#\n",
"19 6\n##..............###\n#......#####.....##\n.....#########.....\n....###########....\n...#############...\n..###############..\n.###############... | [
"3 2\n",
"6 1\n",
"1 8\n"
] | The picture below shows the three possible locations of the ship that contain the cell $(3, 2)$ in the first sample. | 1,000 | [
{
"input": "4 3\n#..#\n#.#.\n....\n.###",
"output": "3 2"
},
{
"input": "10 4\n#....##...\n.#...#....\n..#..#..#.\n...#.#....\n.#..##.#..\n.....#...#\n...#.##...\n.#...#.#..\n.....#..#.\n...#.#...#",
"output": "6 1"
},
{
"input": "19 6\n##..............###\n#......#####.....##\n.....####... | 1,525,605,822 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 62 | 6,963,200 | n,k = map(int, input().split())
import numpy as np
a = []
for i in range(n):
ai = list(map(lambda x: -1 if x == '#' else 0, list(input())))
for i1 in range(n-k+1):
arr = ai[i1:i1+k]
if not -1 in arr:
ai[i1:i1+k] = [x + 1 for x in arr]
a.append(ai)
a = np.array(a, dtype = np.int32)
for i in range(n):
ai = a... | Title: Battleship
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Arkady is playing Battleship. The rules of this game aren't really important.
There is a field of $n \times n$ cells. There should be exactly one $k$-decker on the field, i. e. a ship that is $k$ cells long oriented either ... | ```python
n,k = map(int, input().split())
import numpy as np
a = []
for i in range(n):
ai = list(map(lambda x: -1 if x == '#' else 0, list(input())))
for i1 in range(n-k+1):
arr = ai[i1:i1+k]
if not -1 in arr:
ai[i1:i1+k] = [x + 1 for x in arr]
a.append(ai)
a = np.array(a, dtype = np.int32)
for i in range(n... | -1 | |
952 | C | Ravioli Sort | PROGRAMMING | 1,600 | [
"implementation"
] | null | null | Everybody knows of [spaghetti sort](https://en.wikipedia.org/wiki/Spaghetti_sort). You decided to implement an analog sorting algorithm yourself, but as you survey your pantry you realize you're out of spaghetti! The only type of pasta you have is ravioli, but you are not going to let this stop you...
You come up with... | The first line of input contains a single number *n* (1<=≤<=*n*<=≤<=10) — the size of the array.
The second line of input contains *n* space-separated integers *a**i* (1<=≤<=*a**i*<=≤<=100) — the elements of the array. | Output "YES" if the array can be sorted using the described procedure and "NO" if it can not. | [
"3\n1 2 3\n",
"3\n3 1 2\n"
] | [
"YES\n",
"NO\n"
] | In the second example the array will change even before the tallest stack is chosen for the first time: ravioli from stack of height 3 will slide on the stack of height 1, and the algorithm will output an array {2, 2, 2}. | 0 | [
{
"input": "3\n1 2 3",
"output": "YES"
},
{
"input": "3\n3 1 2",
"output": "NO"
},
{
"input": "1\n13",
"output": "YES"
},
{
"input": "10\n67 67 67 67 67 67 67 67 67 67",
"output": "YES"
},
{
"input": "10\n16 17 16 15 14 15 16 17 16 15",
"output": "YES"
},
... | 1,665,641,929 | 2,147,483,647 | Python 3 | OK | TESTS | 40 | 46 | 0 | n=int(input())
x=list(map(int,input().split()))
count=0
for i in range(n-1):
if x[i]+1==x[i+1] or x[i]-1==x[i+1] or x[i]==x[i+1]: count+=1
else: break
if count==n-1: print('YES')
else: print('NO') | Title: Ravioli Sort
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Everybody knows of [spaghetti sort](https://en.wikipedia.org/wiki/Spaghetti_sort). You decided to implement an analog sorting algorithm yourself, but as you survey your pantry you realize you're out of spaghetti! The only ... | ```python
n=int(input())
x=list(map(int,input().split()))
count=0
for i in range(n-1):
if x[i]+1==x[i+1] or x[i]-1==x[i+1] or x[i]==x[i+1]: count+=1
else: break
if count==n-1: print('YES')
else: print('NO')
``` | 3 | |
11 | A | Increasing Sequence | PROGRAMMING | 900 | [
"constructive algorithms",
"implementation",
"math"
] | A. Increasing Sequence | 1 | 64 | A sequence *a*0,<=*a*1,<=...,<=*a**t*<=-<=1 is called increasing if *a**i*<=-<=1<=<<=*a**i* for each *i*:<=0<=<<=*i*<=<<=*t*.
You are given a sequence *b*0,<=*b*1,<=...,<=*b**n*<=-<=1 and a positive integer *d*. In each move you may choose one element of the given sequence and add *d* to it. What is the least... | The first line of the input contains two integer numbers *n* and *d* (2<=≤<=*n*<=≤<=2000,<=1<=≤<=*d*<=≤<=106). The second line contains space separated sequence *b*0,<=*b*1,<=...,<=*b**n*<=-<=1 (1<=≤<=*b**i*<=≤<=106). | Output the minimal number of moves needed to make the sequence increasing. | [
"4 2\n1 3 3 2\n"
] | [
"3\n"
] | none | 0 | [
{
"input": "4 2\n1 3 3 2",
"output": "3"
},
{
"input": "2 1\n1 1",
"output": "1"
},
{
"input": "2 1\n2 5",
"output": "0"
},
{
"input": "2 1\n1 2",
"output": "0"
},
{
"input": "2 1\n1 1",
"output": "1"
},
{
"input": "2 7\n10 20",
"output": "0"
},
... | 1,689,340,219 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 15 | 1,000 | 0 | _, d = [int(x) for x in input().split(' ')]
l = [int(x) for x in input().split(' ')]
total = 0
for i, el in enumerate(l):
while (i+1 < len(l)) and (el >= l[i+1]):
l[i+1] += d
total += 1
print(total)
| Title: Increasing Sequence
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
A sequence *a*0,<=*a*1,<=...,<=*a**t*<=-<=1 is called increasing if *a**i*<=-<=1<=<<=*a**i* for each *i*:<=0<=<<=*i*<=<<=*t*.
You are given a sequence *b*0,<=*b*1,<=...,<=*b**n*<=-<=1 and a positive integer *d*... | ```python
_, d = [int(x) for x in input().split(' ')]
l = [int(x) for x in input().split(' ')]
total = 0
for i, el in enumerate(l):
while (i+1 < len(l)) and (el >= l[i+1]):
l[i+1] += d
total += 1
print(total)
``` | 0 |
131 | A | cAPS lOCK | PROGRAMMING | 1,000 | [
"implementation",
"strings"
] | null | null | wHAT DO WE NEED cAPS LOCK FOR?
Caps lock is a computer keyboard key. Pressing it sets an input mode in which typed letters are capital by default. If it is pressed by accident, it leads to accidents like the one we had in the first passage.
Let's consider that a word has been typed with the Caps lock key accidentall... | The first line of the input data contains a word consisting of uppercase and lowercase Latin letters. The word's length is from 1 to 100 characters, inclusive. | Print the result of the given word's processing. | [
"cAPS\n",
"Lock\n"
] | [
"Caps",
"Lock\n"
] | none | 500 | [
{
"input": "cAPS",
"output": "Caps"
},
{
"input": "Lock",
"output": "Lock"
},
{
"input": "cAPSlOCK",
"output": "cAPSlOCK"
},
{
"input": "CAPs",
"output": "CAPs"
},
{
"input": "LoCK",
"output": "LoCK"
},
{
"input": "OOPS",
"output": "oops"
},
{
... | 1,697,121,985 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 7 | 62 | 0 | #### Решение задач проекта CODEFORSES, Задача 131A
#
# (C) 2023 Артур Ще, Москва, Россия
# Released under GNU Public License (GPL)
# email [email protected]
# -----------------------------------------------------------
'''
A. cAPS lOCK
ограничение по времени на тест0.5 second
ограничение по памяти на тест256... | Title: cAPS lOCK
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
wHAT DO WE NEED cAPS LOCK FOR?
Caps lock is a computer keyboard key. Pressing it sets an input mode in which typed letters are capital by default. If it is pressed by accident, it leads to accidents like the one we had in th... | ```python
#### Решение задач проекта CODEFORSES, Задача 131A
#
# (C) 2023 Артур Ще, Москва, Россия
# Released under GNU Public License (GPL)
# email [email protected]
# -----------------------------------------------------------
'''
A. cAPS lOCK
ограничение по времени на тест0.5 second
ограничение по памяти ... | 0 | |
611 | B | New Year and Old Property | PROGRAMMING | 1,300 | [
"bitmasks",
"brute force",
"implementation"
] | null | null | The year 2015 is almost over.
Limak is a little polar bear. He has recently learnt about the binary system. He noticed that the passing year has exactly one zero in its representation in the binary system — 201510<==<=111110111112. Note that he doesn't care about the number of zeros in the decimal representation.
Lim... | The only line of the input contains two integers *a* and *b* (1<=≤<=*a*<=≤<=*b*<=≤<=1018) — the first year and the last year in Limak's interval respectively. | Print one integer – the number of years Limak will count in his chosen interval. | [
"5 10\n",
"2015 2015\n",
"100 105\n",
"72057594000000000 72057595000000000\n"
] | [
"2\n",
"1\n",
"0\n",
"26\n"
] | In the first sample Limak's interval contains numbers 5<sub class="lower-index">10</sub> = 101<sub class="lower-index">2</sub>, 6<sub class="lower-index">10</sub> = 110<sub class="lower-index">2</sub>, 7<sub class="lower-index">10</sub> = 111<sub class="lower-index">2</sub>, 8<sub class="lower-index">10</sub> = 1000<su... | 750 | [
{
"input": "5 10",
"output": "2"
},
{
"input": "2015 2015",
"output": "1"
},
{
"input": "100 105",
"output": "0"
},
{
"input": "72057594000000000 72057595000000000",
"output": "26"
},
{
"input": "1 100",
"output": "16"
},
{
"input": "100000000000000000... | 1,607,575,391 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 3 | 2,000 | 307,200 | from math import log,floor
a,b=map(int,input().split())
p=floor(log(a,2)+1)
n1=a
n2=min(2**p,b)
count=0
while(n1<=n2):
n=n1
zero=0
while(n!=0):
if n&1==0:
zero+=1
if zero>1:
break
n>>=1
if zero==1:
count+=1
n1+=1
p+=1
# print... | Title: New Year and Old Property
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The year 2015 is almost over.
Limak is a little polar bear. He has recently learnt about the binary system. He noticed that the passing year has exactly one zero in its representation in the binary system — 2... | ```python
from math import log,floor
a,b=map(int,input().split())
p=floor(log(a,2)+1)
n1=a
n2=min(2**p,b)
count=0
while(n1<=n2):
n=n1
zero=0
while(n!=0):
if n&1==0:
zero+=1
if zero>1:
break
n>>=1
if zero==1:
count+=1
n1+=1
p+=... | 0 | |
263 | A | Beautiful Matrix | PROGRAMMING | 800 | [
"implementation"
] | null | null | You've got a 5<=×<=5 matrix, consisting of 24 zeroes and a single number one. Let's index the matrix rows by numbers from 1 to 5 from top to bottom, let's index the matrix columns by numbers from 1 to 5 from left to right. In one move, you are allowed to apply one of the two following transformations to the matrix:
1.... | The input consists of five lines, each line contains five integers: the *j*-th integer in the *i*-th line of the input represents the element of the matrix that is located on the intersection of the *i*-th row and the *j*-th column. It is guaranteed that the matrix consists of 24 zeroes and a single number one. | Print a single integer — the minimum number of moves needed to make the matrix beautiful. | [
"0 0 0 0 0\n0 0 0 0 1\n0 0 0 0 0\n0 0 0 0 0\n0 0 0 0 0\n",
"0 0 0 0 0\n0 0 0 0 0\n0 1 0 0 0\n0 0 0 0 0\n0 0 0 0 0\n"
] | [
"3\n",
"1\n"
] | none | 500 | [
{
"input": "0 0 0 0 0\n0 0 0 0 1\n0 0 0 0 0\n0 0 0 0 0\n0 0 0 0 0",
"output": "3"
},
{
"input": "0 0 0 0 0\n0 0 0 0 0\n0 1 0 0 0\n0 0 0 0 0\n0 0 0 0 0",
"output": "1"
},
{
"input": "0 0 0 0 0\n0 0 0 0 0\n0 0 1 0 0\n0 0 0 0 0\n0 0 0 0 0",
"output": "0"
},
{
"input": "0 0 0 0 0... | 1,694,704,542 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | a,b,c,d,e = list(map(int, input().split()))
if 1 in a and b and c and d and e:
print(abs(a,b,c,d,e.index(1)-2)+1)
else:
print() | Title: Beautiful Matrix
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You've got a 5<=×<=5 matrix, consisting of 24 zeroes and a single number one. Let's index the matrix rows by numbers from 1 to 5 from top to bottom, let's index the matrix columns by numbers from 1 to 5 from left to ri... | ```python
a,b,c,d,e = list(map(int, input().split()))
if 1 in a and b and c and d and e:
print(abs(a,b,c,d,e.index(1)-2)+1)
else:
print()
``` | -1 | |
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... | 1,559,996,079 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 216 | 0 | def findCase(myStr):
if len(myStr) <= 1:
return myStr
list_case = list(myStr)
upper_ct, lower_ct = 0,0
for char in list_case:
if char.isupper():
upper_ct += 1
continue
if char.islower():
lower_ct += 1
continue
if(low... | 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 findCase(myStr):
if len(myStr) <= 1:
return myStr
list_case = list(myStr)
upper_ct, lower_ct = 0,0
for char in list_case:
if char.isupper():
upper_ct += 1
continue
if char.islower():
lower_ct += 1
continue
... | 3.946 |
420 | A | Start Up | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | Recently, a start up by two students of a state university of city F gained incredible popularity. Now it's time to start a new company. But what do we call it?
The market analysts came up with a very smart plan: the name of the company should be identical to its reflection in a mirror! In other words, if we write out... | The first line contains a non-empty name that needs to be checked. The name contains at most 105 large English letters. The name will be written with the next sans serif font: | Print 'YES' (without the quotes), if the given name matches its mirror reflection. Otherwise, print 'NO' (without the quotes). | [
"AHA\n",
"Z\n",
"XO\n"
] | [
"YES\n",
"NO\n",
"NO\n"
] | none | 500 | [
{
"input": "AHA",
"output": "YES"
},
{
"input": "Z",
"output": "NO"
},
{
"input": "XO",
"output": "NO"
},
{
"input": "AAA",
"output": "YES"
},
{
"input": "AHHA",
"output": "YES"
},
{
"input": "BAB",
"output": "NO"
},
{
"input": "OMMMAAMMMO"... | 1,642,946,660 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 80 | 108 | 1,638,400 | que='AHIMOTUVWXY'
s=input()
def solve():
for i in s:
if i not in que:
print("NO")
return
for i in range(len(s)//2):
if(s[i]!=s[-i-1]):
print("NO")
return
print("YES")
solve() | Title: Start Up
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Recently, a start up by two students of a state university of city F gained incredible popularity. Now it's time to start a new company. But what do we call it?
The market analysts came up with a very smart plan: the name of ... | ```python
que='AHIMOTUVWXY'
s=input()
def solve():
for i in s:
if i not in que:
print("NO")
return
for i in range(len(s)//2):
if(s[i]!=s[-i-1]):
print("NO")
return
print("YES")
solve()
``` | 3 | |
803 | B | Distances to Zero | PROGRAMMING | 1,200 | [
"constructive algorithms"
] | null | null | You are given the array of integer numbers *a*0,<=*a*1,<=...,<=*a**n*<=-<=1. For each element find the distance to the nearest zero (to the element which equals to zero). There is at least one zero element in the given array. | The first line contains integer *n* (1<=≤<=*n*<=≤<=2·105) — length of the array *a*. The second line contains integer elements of the array separated by single spaces (<=-<=109<=≤<=*a**i*<=≤<=109). | Print the sequence *d*0,<=*d*1,<=...,<=*d**n*<=-<=1, where *d**i* is the difference of indices between *i* and nearest *j* such that *a**j*<==<=0. It is possible that *i*<==<=*j*. | [
"9\n2 1 0 3 0 0 3 2 4\n",
"5\n0 1 2 3 4\n",
"7\n5 6 0 1 -2 3 4\n"
] | [
"2 1 0 1 0 0 1 2 3 ",
"0 1 2 3 4 ",
"2 1 0 1 2 3 4 "
] | none | 0 | [
{
"input": "9\n2 1 0 3 0 0 3 2 4",
"output": "2 1 0 1 0 0 1 2 3 "
},
{
"input": "5\n0 1 2 3 4",
"output": "0 1 2 3 4 "
},
{
"input": "7\n5 6 0 1 -2 3 4",
"output": "2 1 0 1 2 3 4 "
},
{
"input": "1\n0",
"output": "0 "
},
{
"input": "2\n0 0",
"output": "0 0 "
... | 1,700,309,084 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 164 | 233 | 33,280,000 |
n=int(input())
a=list(map(int,input().split()))
res=[0]*n
ld=[0]*n
rd=[0]*n
distance=float('inf')
for i in range(n):
if a[i]==0:
distance=0
else:
distance+=1
ld[i]=distance
distance=float('inf')
for i in range(n-1,-1,-1):
if a[i]==0:
distance=0
else:
... | Title: Distances to Zero
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given the array of integer numbers *a*0,<=*a*1,<=...,<=*a**n*<=-<=1. For each element find the distance to the nearest zero (to the element which equals to zero). There is at least one zero element in the give... | ```python
n=int(input())
a=list(map(int,input().split()))
res=[0]*n
ld=[0]*n
rd=[0]*n
distance=float('inf')
for i in range(n):
if a[i]==0:
distance=0
else:
distance+=1
ld[i]=distance
distance=float('inf')
for i in range(n-1,-1,-1):
if a[i]==0:
distance=0
e... | 3 | |
361 | A | Levko and Table | PROGRAMMING | 800 | [
"constructive algorithms",
"implementation"
] | null | null | Levko loves tables that consist of *n* rows and *n* columns very much. He especially loves beautiful tables. A table is beautiful to Levko if the sum of elements in each row and column of the table equals *k*.
Unfortunately, he doesn't know any such table. Your task is to help him to find at least one of them. | The single line contains two integers, *n* and *k* (1<=≤<=*n*<=≤<=100, 1<=≤<=*k*<=≤<=1000). | Print any beautiful table. Levko doesn't like too big numbers, so all elements of the table mustn't exceed 1000 in their absolute value.
If there are multiple suitable tables, you are allowed to print any of them. | [
"2 4\n",
"4 7\n"
] | [
"1 3\n3 1\n",
"2 1 0 4\n4 0 2 1\n1 3 3 0\n0 3 2 2\n"
] | In the first sample the sum in the first row is 1 + 3 = 4, in the second row — 3 + 1 = 4, in the first column — 1 + 3 = 4 and in the second column — 3 + 1 = 4. There are other beautiful tables for this sample.
In the second sample the sum of elements in each row and each column equals 7. Besides, there are other table... | 500 | [
{
"input": "2 4",
"output": "4 0 \n0 4 "
},
{
"input": "4 7",
"output": "7 0 0 0 \n0 7 0 0 \n0 0 7 0 \n0 0 0 7 "
},
{
"input": "1 8",
"output": "8 "
},
{
"input": "9 3",
"output": "3 0 0 0 0 0 0 0 0 \n0 3 0 0 0 0 0 0 0 \n0 0 3 0 0 0 0 0 0 \n0 0 0 3 0 0 0 0 0 \n0 0 0 0 3 0... | 1,685,521,359 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 1 | 46 | 0 | #Cypher
#Indian Institute Of Technology, Jodhpur
import sys
input = lambda: sys.stdin.readline().rstrip()
mod= 10**9+7
n,k=map(int,input().split())
a=k//n
b=k%n
flag=0
if b==0:
flag=1
for i in range(n):
for j in range(n):
if i==j and not flag:
print(b,end=" ")
else:
... | Title: Levko and Table
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Levko loves tables that consist of *n* rows and *n* columns very much. He especially loves beautiful tables. A table is beautiful to Levko if the sum of elements in each row and column of the table equals *k*.
Unfortun... | ```python
#Cypher
#Indian Institute Of Technology, Jodhpur
import sys
input = lambda: sys.stdin.readline().rstrip()
mod= 10**9+7
n,k=map(int,input().split())
a=k//n
b=k%n
flag=0
if b==0:
flag=1
for i in range(n):
for j in range(n):
if i==j and not flag:
print(b,end=" ")
... | 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... | 1,539,361,191 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 77 | 0 | word = "hello"
index = 0
st=input()
for i in range(0,len(st)):
if(index==5):
print ("YES")
if(st[i]==word[index]):
index+=1
if(index<5):
print("NO")
else:
print("YES")
| 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
word = "hello"
index = 0
st=input()
for i in range(0,len(st)):
if(index==5):
print ("YES")
if(st[i]==word[index]):
index+=1
if(index<5):
print("NO")
else:
print("YES")
``` | -1 |
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