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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
429 | A | Xor-tree | PROGRAMMING | 1,300 | [
"dfs and similar",
"trees"
] | null | null | Iahub is very proud of his recent discovery, propagating trees. Right now, he invented a new tree, called xor-tree. After this new revolutionary discovery, he invented a game for kids which uses xor-trees.
The game is played on a tree having *n* nodes, numbered from 1 to *n*. Each node *i* has an initial value *init**... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=105). Each of the next *n*<=-<=1 lines contains two integers *u**i* and *v**i* (1<=≤<=*u**i*,<=*v**i*<=≤<=*n*; *u**i*<=≠<=*v**i*) meaning there is an edge between nodes *u**i* and *v**i*.
The next line contains *n* integer numbers, the *i*-th of them corresponds t... | In the first line output an integer number *cnt*, representing the minimal number of operations you perform. Each of the next *cnt* lines should contain an integer *x**i*, representing that you pick a node *x**i*. | [
"10\n2 1\n3 1\n4 2\n5 1\n6 2\n7 5\n8 6\n9 8\n10 5\n1 0 1 1 0 1 0 1 0 1\n1 0 1 0 0 1 1 1 0 1\n"
] | [
"2\n4\n7\n"
] | none | 500 | [
{
"input": "10\n2 1\n3 1\n4 2\n5 1\n6 2\n7 5\n8 6\n9 8\n10 5\n1 0 1 1 0 1 0 1 0 1\n1 0 1 0 0 1 1 1 0 1",
"output": "2\n4\n7"
},
{
"input": "15\n2 1\n3 2\n4 3\n5 4\n6 5\n7 6\n8 7\n9 8\n10 9\n11 10\n12 11\n13 12\n14 13\n15 14\n0 1 0 0 1 1 1 1 1 1 0 0 0 1 1\n1 1 1 1 0 0 1 1 0 1 0 0 1 1 0",
"output"... | 1,555,014,376 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | #include <bits/stdc++.h>
using namespace std;
#define FOR(i, x, n) for(ll i = x; i < n; i++)
#define pb push_back
#define ll long long
#define hii cerr << "hii" << endl
#define pii pair<int, int>
#define pll pair<ll, ll>
#define int ll
#define mpp make_pair
#define endl '\n'
#define ff first
#define ss ... | Title: Xor-tree
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Iahub is very proud of his recent discovery, propagating trees. Right now, he invented a new tree, called xor-tree. After this new revolutionary discovery, he invented a game for kids which uses xor-trees.
The game is played ... | ```python
#include <bits/stdc++.h>
using namespace std;
#define FOR(i, x, n) for(ll i = x; i < n; i++)
#define pb push_back
#define ll long long
#define hii cerr << "hii" << endl
#define pii pair<int, int>
#define pll pair<ll, ll>
#define int ll
#define mpp make_pair
#define endl '\n'
#define ff first
#... | -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... | 1,691,278,111 | 2,147,483,647 | Python 3 | OK | TESTS | 71 | 92 | 0 | l = int(input())
c = 0
cu = 0
for _ in range(l):
a, b = map(int, input().split())
cu = cu - a + b
c = max(c, cu)
print(c)
| 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
l = int(input())
c = 0
cu = 0
for _ in range(l):
a, b = map(int, input().split())
cu = cu - a + b
c = max(c, cu)
print(c)
``` | 3 | |
678 | B | The Same Calendar | PROGRAMMING | 1,600 | [
"implementation"
] | null | null | The girl Taylor has a beautiful calendar for the year *y*. In the calendar all days are given with their days of week: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday.
The calendar is so beautiful that she wants to know what is the next year after *y* when the calendar will be exactly the same. Help ... | The only line contains integer *y* (1000<=≤<=*y*<=<<=100'000) — the year of the calendar. | Print the only integer *y*' — the next year after *y* when the calendar will be the same. Note that you should find the first year after *y* with the same calendar. | [
"2016\n",
"2000\n",
"50501\n"
] | [
"2044\n",
"2028\n",
"50507\n"
] | Today is Monday, the 13th of June, 2016. | 0 | [
{
"input": "2016",
"output": "2044"
},
{
"input": "2000",
"output": "2028"
},
{
"input": "50501",
"output": "50507"
},
{
"input": "1000",
"output": "1006"
},
{
"input": "1900",
"output": "1906"
},
{
"input": "1899",
"output": "1905"
},
{
"i... | 1,532,987,881 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | def is_visok(x):
return x % 400 == 0 or x % 4 == 0 and x % 100 != 0
y = int(input())
d, v = 0, is_visok(y)
year = y
d_ = d
v_ = not v
while not (v_ == v and d_ % 7 = 0):
year += 1
v_ = is_visok(year)
d_ += (365, 366)[v_] % 7
print(year)
| Title: The Same Calendar
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The girl Taylor has a beautiful calendar for the year *y*. In the calendar all days are given with their days of week: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday.
The calendar is so beautiful t... | ```python
def is_visok(x):
return x % 400 == 0 or x % 4 == 0 and x % 100 != 0
y = int(input())
d, v = 0, is_visok(y)
year = y
d_ = d
v_ = not v
while not (v_ == v and d_ % 7 = 0):
year += 1
v_ = is_visok(year)
d_ += (365, 366)[v_] % 7
print(year)
``` | -1 | |
975 | A | Aramic script | PROGRAMMING | 900 | [
"implementation",
"strings"
] | null | null | In Aramic language words can only represent objects.
Words in Aramic have special properties:
- A word is a root if it does not contain the same letter more than once. - A root and all its permutations represent the same object. - The root $x$ of a word $y$ is the word that contains all letters that appear in $y$... | The first line contains one integer $n$ ($1 \leq n \leq 10^3$) — the number of words in the script.
The second line contains $n$ words $s_1, s_2, \ldots, s_n$ — the script itself. The length of each string does not exceed $10^3$.
It is guaranteed that all characters of the strings are small latin letters. | Output one integer — the number of different objects mentioned in the given ancient Aramic script. | [
"5\na aa aaa ab abb\n",
"3\namer arem mrea\n"
] | [
"2",
"1"
] | In the first test, there are two objects mentioned. The roots that represent them are "a","ab".
In the second test, there is only one object, its root is "amer", the other strings are just permutations of "amer". | 500 | [
{
"input": "5\na aa aaa ab abb",
"output": "2"
},
{
"input": "3\namer arem mrea",
"output": "1"
},
{
"input": "10\nbda bbb cda dca dda dcb bcd dcb ada ddd",
"output": "6"
},
{
"input": "2\nfhjlqs aceginpr",
"output": "2"
},
{
"input": "2\nbcdfghimn efghijlmo",
... | 1,679,837,890 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 30 | 280 | 43,417,600 | n=int(input())
a=list(input().split())
d={}
for i in range(n):
a[i]=sorted(a[i])
s=a[i][0]
for j in range(len(a[i])-1):
if a[i][j]!=a[i][j+1]:
s+=a[i][j+1]
if s in d:
d[s]+=1
else:
d[s]=1
print(len(d)) | Title: Aramic script
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
In Aramic language words can only represent objects.
Words in Aramic have special properties:
- A word is a root if it does not contain the same letter more than once. - A root and all its permutations represent the ... | ```python
n=int(input())
a=list(input().split())
d={}
for i in range(n):
a[i]=sorted(a[i])
s=a[i][0]
for j in range(len(a[i])-1):
if a[i][j]!=a[i][j+1]:
s+=a[i][j+1]
if s in d:
d[s]+=1
else:
d[s]=1
print(len(d))
``` | 3 | |
169 | B | Replacing Digits | PROGRAMMING | 1,100 | [
"greedy"
] | null | null | You are given an integer *a* that consists of *n* digits. You are also given a sequence of digits *s* of length *m*. The digit in position *j* (1<=≤<=*j*<=≤<=*m*) of sequence *s* means that you can choose an arbitrary position *i* (1<=≤<=*i*<=≤<=*n*) in *a* and replace the digit in the chosen position *i* with *s**j*. ... | The first line contains positive integer *a*. Its length *n* is positive and doesn't exceed 105. The second line contains sequence of digits *s*. Its length *m* is positive and doesn't exceed 105. The digits in the sequence *s* are written consecutively without any separators.
The given number *a* doesn't contain lead... | Print the maximum value that can be obtained from *a* after a series of replacements. You are allowed to use not all elements from *s*. The printed number shouldn't contain any leading zeroes. | [
"1024\n010\n",
"987\n1234567\n"
] | [
"1124\n",
"987\n"
] | none | 1,000 | [
{
"input": "1024\n010",
"output": "1124"
},
{
"input": "987\n1234567",
"output": "987"
},
{
"input": "10\n1",
"output": "11"
},
{
"input": "11\n1",
"output": "11"
},
{
"input": "12\n2",
"output": "22"
},
{
"input": "1\n0",
"output": "1"
},
{
... | 1,518,200,426 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 4 | 92 | 5,632,000 | """
Brandt Smith, Peter Haddad and Lemuel Gorion
Codeforces.com
Problem 169B
"""
a = input()
s = input()
a = [int(x) for x in str(a)]
s = [int(x) for x in str(s)]
s.sort(reverse = True)
final_num = []
for i in range(len(a)):
m = a[i]
n = s[0]
if n > m:
temp = n
s.pop()
else:
... | Title: Replacing Digits
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given an integer *a* that consists of *n* digits. You are also given a sequence of digits *s* of length *m*. The digit in position *j* (1<=≤<=*j*<=≤<=*m*) of sequence *s* means that you can choose an arbitrary ... | ```python
"""
Brandt Smith, Peter Haddad and Lemuel Gorion
Codeforces.com
Problem 169B
"""
a = input()
s = input()
a = [int(x) for x in str(a)]
s = [int(x) for x in str(s)]
s.sort(reverse = True)
final_num = []
for i in range(len(a)):
m = a[i]
n = s[0]
if n > m:
temp = n
s.pop()
e... | -1 | |
791 | A | Bear and Big Brother | PROGRAMMING | 800 | [
"implementation"
] | null | null | Bear Limak wants to become the largest of bears, or at least to become larger than his brother Bob.
Right now, Limak and Bob weigh *a* and *b* respectively. It's guaranteed that Limak's weight is smaller than or equal to his brother's weight.
Limak eats a lot and his weight is tripled after every year, while Bob's we... | The only line of the input contains two integers *a* and *b* (1<=≤<=*a*<=≤<=*b*<=≤<=10) — the weight of Limak and the weight of Bob respectively. | Print one integer, denoting the integer number of years after which Limak will become strictly larger than Bob. | [
"4 7\n",
"4 9\n",
"1 1\n"
] | [
"2\n",
"3\n",
"1\n"
] | In the first sample, Limak weighs 4 and Bob weighs 7 initially. After one year their weights are 4·3 = 12 and 7·2 = 14 respectively (one weight is tripled while the other one is doubled). Limak isn't larger than Bob yet. After the second year weights are 36 and 28, so the first weight is greater than the second one. Li... | 500 | [
{
"input": "4 7",
"output": "2"
},
{
"input": "4 9",
"output": "3"
},
{
"input": "1 1",
"output": "1"
},
{
"input": "4 6",
"output": "2"
},
{
"input": "1 10",
"output": "6"
},
{
"input": "1 1",
"output": "1"
},
{
"input": "1 2",
"output... | 1,696,776,090 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 0 | 77 | 2,150,400 | a,b=int(input().split())
year=0
while a<=b:
a*=3
b*=2
year+=1
if a>b:
break
print(year)
| Title: Bear and Big Brother
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Bear Limak wants to become the largest of bears, or at least to become larger than his brother Bob.
Right now, Limak and Bob weigh *a* and *b* respectively. It's guaranteed that Limak's weight is smaller than or e... | ```python
a,b=int(input().split())
year=0
while a<=b:
a*=3
b*=2
year+=1
if a>b:
break
print(year)
``` | -1 | |
546 | A | Soldier and Bananas | PROGRAMMING | 800 | [
"brute force",
"implementation",
"math"
] | null | null | A soldier wants to buy *w* bananas in the shop. He has to pay *k* dollars for the first banana, 2*k* dollars for the second one and so on (in other words, he has to pay *i*·*k* dollars for the *i*-th banana).
He has *n* dollars. How many dollars does he have to borrow from his friend soldier to buy *w* bananas? | The first line contains three positive integers *k*,<=*n*,<=*w* (1<=<=≤<=<=*k*,<=*w*<=<=≤<=<=1000, 0<=≤<=*n*<=≤<=109), the cost of the first banana, initial number of dollars the soldier has and number of bananas he wants. | Output one integer — the amount of dollars that the soldier must borrow from his friend. If he doesn't have to borrow money, output 0. | [
"3 17 4\n"
] | [
"13"
] | none | 500 | [
{
"input": "3 17 4",
"output": "13"
},
{
"input": "1 2 1",
"output": "0"
},
{
"input": "1 1 1",
"output": "0"
},
{
"input": "1 5 6",
"output": "16"
},
{
"input": "1 1000000000 1",
"output": "0"
},
{
"input": "1000 0 1000",
"output": "500500000"
}... | 1,695,812,283 | 2,147,483,647 | Python 3 | OK | TESTS | 15 | 46 | 5,632,000 | k, n, w = list(map(int, input().split()))
su = 0
for i in range(1,w+1):
su += i * k
print(max(su - n,0))
| Title: Soldier and Bananas
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A soldier wants to buy *w* bananas in the shop. He has to pay *k* dollars for the first banana, 2*k* dollars for the second one and so on (in other words, he has to pay *i*·*k* dollars for the *i*-th banana).
He h... | ```python
k, n, w = list(map(int, input().split()))
su = 0
for i in range(1,w+1):
su += i * k
print(max(su - n,0))
``` | 3 | |
680 | B | Bear and Finding Criminals | PROGRAMMING | 1,000 | [
"constructive algorithms",
"implementation"
] | null | null | There are *n* cities in Bearland, numbered 1 through *n*. Cities are arranged in one long row. The distance between cities *i* and *j* is equal to |*i*<=-<=*j*|.
Limak is a police officer. He lives in a city *a*. His job is to catch criminals. It's hard because he doesn't know in which cities criminals are. Though, he... | The first line of the input contains two integers *n* and *a* (1<=≤<=*a*<=≤<=*n*<=≤<=100) — the number of cities and the index of city where Limak lives.
The second line contains *n* integers *t*1,<=*t*2,<=...,<=*t**n* (0<=≤<=*t**i*<=≤<=1). There are *t**i* criminals in the *i*-th city. | Print the number of criminals Limak will catch. | [
"6 3\n1 1 1 0 1 0\n",
"5 2\n0 0 0 1 0\n"
] | [
"3\n",
"1\n"
] | In the first sample, there are six cities and Limak lives in the third one (blue arrow below). Criminals are in cities marked red.
Using the BCD gives Limak the following information:
- There is one criminal at distance 0 from the third city — Limak is sure that this criminal is exactly in the third city. - There i... | 1,000 | [
{
"input": "6 3\n1 1 1 0 1 0",
"output": "3"
},
{
"input": "5 2\n0 0 0 1 0",
"output": "1"
},
{
"input": "1 1\n1",
"output": "1"
},
{
"input": "1 1\n0",
"output": "0"
},
{
"input": "9 3\n1 1 1 1 1 1 1 1 0",
"output": "8"
},
{
"input": "9 5\n1 0 1 0 1 0... | 1,631,742,338 | 2,147,483,647 | PyPy 3 | OK | TESTS | 24 | 109 | 20,172,800 | def main():
n, city = [int(x) for x in input().split()]
city = city - 1
count = 0
lis = [int(x) for x in input().split()]
if lis[city]==1:
count = count +1
for i in range(1,n):
lef,rig = 0,0
rig = city +i
lef = city -i
if lef >=0 or rig... | Title: Bear and Finding Criminals
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There are *n* cities in Bearland, numbered 1 through *n*. Cities are arranged in one long row. The distance between cities *i* and *j* is equal to |*i*<=-<=*j*|.
Limak is a police officer. He lives in a city... | ```python
def main():
n, city = [int(x) for x in input().split()]
city = city - 1
count = 0
lis = [int(x) for x in input().split()]
if lis[city]==1:
count = count +1
for i in range(1,n):
lef,rig = 0,0
rig = city +i
lef = city -i
if lef ... | 3 | |
540 | D | Bad Luck Island | PROGRAMMING | 1,900 | [
"dp",
"probabilities"
] | null | null | The Bad Luck Island is inhabited by three kinds of species: *r* rocks, *s* scissors and *p* papers. At some moments of time two random individuals meet (all pairs of individuals can meet equiprobably), and if they belong to different species, then one individual kills the other one: a rock kills scissors, scissors kill... | The single line contains three integers *r*, *s* and *p* (1<=≤<=*r*,<=*s*,<=*p*<=≤<=100) — the original number of individuals in the species of rock, scissors and paper, respectively. | Print three space-separated real numbers: the probabilities, at which the rocks, the scissors and the paper will be the only surviving species, respectively. The answer will be considered correct if the relative or absolute error of each number doesn't exceed 10<=-<=9. | [
"2 2 2\n",
"2 1 2\n",
"1 1 3\n"
] | [
"0.333333333333 0.333333333333 0.333333333333\n",
"0.150000000000 0.300000000000 0.550000000000\n",
"0.057142857143 0.657142857143 0.285714285714\n"
] | none | 2,000 | [
{
"input": "2 2 2",
"output": "0.333333333333 0.333333333333 0.333333333333"
},
{
"input": "2 1 2",
"output": "0.150000000000 0.300000000000 0.550000000000"
},
{
"input": "1 1 3",
"output": "0.057142857143 0.657142857143 0.285714285714"
},
{
"input": "3 2 1",
"output": "0... | 1,628,574,783 | 2,147,483,647 | PyPy 3 | OK | TESTS | 96 | 1,107 | 81,510,400 | def var():
return (map(int,input().split()))
def a():
return list((map(int,input().split())))
import copy
from collections import defaultdict,deque
dp1=[[[-1]*(102) for _ in range(102)] for _ in range(102)]
dp2=[[[-1]*(102) for _ in range(102)] for _ in range(102)]
dp3=[[[-1]*(102) for _ in range(... | Title: Bad Luck Island
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Bad Luck Island is inhabited by three kinds of species: *r* rocks, *s* scissors and *p* papers. At some moments of time two random individuals meet (all pairs of individuals can meet equiprobably), and if they belon... | ```python
def var():
return (map(int,input().split()))
def a():
return list((map(int,input().split())))
import copy
from collections import defaultdict,deque
dp1=[[[-1]*(102) for _ in range(102)] for _ in range(102)]
dp2=[[[-1]*(102) for _ in range(102)] for _ in range(102)]
dp3=[[[-1]*(102) for _... | 3 | |
877 | A | Alex and broken contest | PROGRAMMING | 1,100 | [
"implementation",
"strings"
] | null | null | One day Alex was creating a contest about his friends, but accidentally deleted it. Fortunately, all the problems were saved, but now he needs to find them among other problems.
But there are too many problems, to do it manually. Alex asks you to write a program, which will determine if a problem is from this contest ... | The only line contains string from lowercase and uppercase letters and "_" symbols of length, not more than 100 — the name of the problem. | Print "YES", if problem is from this contest, and "NO" otherwise. | [
"Alex_and_broken_contest\n",
"NikitaAndString\n",
"Danil_and_Olya\n"
] | [
"NO",
"YES",
"NO"
] | none | 500 | [
{
"input": "Alex_and_broken_contest",
"output": "NO"
},
{
"input": "NikitaAndString",
"output": "YES"
},
{
"input": "Danil_and_Olya",
"output": "NO"
},
{
"input": "Slava____and_the_game",
"output": "YES"
},
{
"input": "Olya_and_energy_drinks",
"output": "YES"
... | 1,605,274,217 | 2,147,483,647 | Python 3 | OK | TESTS | 55 | 109 | 0 | ls=["Danil","Olya","Slava","Ann","Nikita"]
s=input()
ctr=0
for a in ls:
ctr+=s.count(a)
if ctr==1:
print("YES")
else:
print("NO") | Title: Alex and broken contest
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day Alex was creating a contest about his friends, but accidentally deleted it. Fortunately, all the problems were saved, but now he needs to find them among other problems.
But there are too many problems,... | ```python
ls=["Danil","Olya","Slava","Ann","Nikita"]
s=input()
ctr=0
for a in ls:
ctr+=s.count(a)
if ctr==1:
print("YES")
else:
print("NO")
``` | 3 | |
281 | A | Word Capitalization | PROGRAMMING | 800 | [
"implementation",
"strings"
] | null | null | Capitalization is writing a word with its first letter as a capital letter. Your task is to capitalize the given word.
Note, that during capitalization all the letters except the first one remains unchanged. | A single line contains a non-empty word. This word consists of lowercase and uppercase English letters. The length of the word will not exceed 103. | Output the given word after capitalization. | [
"ApPLe\n",
"konjac\n"
] | [
"ApPLe\n",
"Konjac\n"
] | none | 500 | [
{
"input": "ApPLe",
"output": "ApPLe"
},
{
"input": "konjac",
"output": "Konjac"
},
{
"input": "a",
"output": "A"
},
{
"input": "A",
"output": "A"
},
{
"input": "z",
"output": "Z"
},
{
"input": "ABACABA",
"output": "ABACABA"
},
{
"input": "... | 1,699,939,826 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | word = 'konjac'
print(word[0].upper()+word[1:]) | Title: Word Capitalization
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Capitalization is writing a word with its first letter as a capital letter. Your task is to capitalize the given word.
Note, that during capitalization all the letters except the first one remains unchanged.
Input... | ```python
word = 'konjac'
print(word[0].upper()+word[1:])
``` | 0 | |
401 | A | Vanya and Cards | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | Vanya loves playing. He even has a special set of cards to play with. Each card has a single integer. The number on the card can be positive, negative and can even be equal to zero. The only limit is, the number on each card doesn't exceed *x* in the absolute value.
Natasha doesn't like when Vanya spends a long time p... | The first line contains two integers: *n* (1<=≤<=*n*<=≤<=1000) — the number of found cards and *x* (1<=≤<=*x*<=≤<=1000) — the maximum absolute value of the number on a card. The second line contains *n* space-separated integers — the numbers on found cards. It is guaranteed that the numbers do not exceed *x* in their a... | Print a single number — the answer to the problem. | [
"3 2\n-1 1 2\n",
"2 3\n-2 -2\n"
] | [
"1\n",
"2\n"
] | In the first sample, Vanya needs to find a single card with number -2.
In the second sample, Vanya needs to find two cards with number 2. He can't find a single card with the required number as the numbers on the lost cards do not exceed 3 in their absolute value. | 500 | [
{
"input": "3 2\n-1 1 2",
"output": "1"
},
{
"input": "2 3\n-2 -2",
"output": "2"
},
{
"input": "4 4\n1 2 3 4",
"output": "3"
},
{
"input": "2 2\n-1 -1",
"output": "1"
},
{
"input": "15 5\n-2 -1 2 -4 -3 4 -4 -2 -2 2 -2 -1 1 -4 -2",
"output": "4"
},
{
"... | 1,617,148,046 | 2,147,483,647 | Python 3 | OK | TESTS | 47 | 77 | 204,800 | import math
n,x= map(int,input().split())
l=[]
c=0
y=0
list1=[]
l.extend(map(int,input().split()))
sumy= sum(l)
res=math.fabs(sumy)
if res>x:
while res>x:
res-=x
c+=1
else :
c+=1
elif not res:
print(0)
else:
print(1)
if c:
print(c) | Title: Vanya and Cards
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vanya loves playing. He even has a special set of cards to play with. Each card has a single integer. The number on the card can be positive, negative and can even be equal to zero. The only limit is, the number on each... | ```python
import math
n,x= map(int,input().split())
l=[]
c=0
y=0
list1=[]
l.extend(map(int,input().split()))
sumy= sum(l)
res=math.fabs(sumy)
if res>x:
while res>x:
res-=x
c+=1
else :
c+=1
elif not res:
print(0)
else:
print(1)
if c:
print(c)
``` | 3 | |
868 | A | Bark to Unlock | PROGRAMMING | 900 | [
"brute force",
"implementation",
"strings"
] | null | null | As technologies develop, manufacturers are making the process of unlocking a phone as user-friendly as possible. To unlock its new phone, Arkady's pet dog Mu-mu has to bark the password once. The phone represents a password as a string of two lowercase English letters.
Mu-mu's enemy Kashtanka wants to unlock Mu-mu's p... | The first line contains two lowercase English letters — the password on the phone.
The second line contains single integer *n* (1<=≤<=*n*<=≤<=100) — the number of words Kashtanka knows.
The next *n* lines contain two lowercase English letters each, representing the words Kashtanka knows. The words are guaranteed to b... | Print "YES" if Kashtanka can bark several words in a line forming a string containing the password, and "NO" otherwise.
You can print each letter in arbitrary case (upper or lower). | [
"ya\n4\nah\noy\nto\nha\n",
"hp\n2\nht\ntp\n",
"ah\n1\nha\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | In the first example the password is "ya", and Kashtanka can bark "oy" and then "ah", and then "ha" to form the string "oyahha" which contains the password. So, the answer is "YES".
In the second example Kashtanka can't produce a string containing password as a substring. Note that it can bark "ht" and then "tp" produ... | 250 | [
{
"input": "ya\n4\nah\noy\nto\nha",
"output": "YES"
},
{
"input": "hp\n2\nht\ntp",
"output": "NO"
},
{
"input": "ah\n1\nha",
"output": "YES"
},
{
"input": "bb\n4\nba\nab\naa\nbb",
"output": "YES"
},
{
"input": "bc\n4\nca\nba\nbb\ncc",
"output": "YES"
},
{
... | 1,642,004,612 | 2,147,483,647 | PyPy 3 | OK | TESTS | 90 | 77 | 0 | import sys
input = sys.stdin.readline
pwd = input().strip()
n = int(input())
fst, lst = False, False
arr = []
for i in range(n):
arr.append(input().strip())
for i in range(n):
wrd = arr[i]
if (wrd == pwd) or (pwd == (wrd[::-1])):
fst = True
lst = True
break
... | Title: Bark to Unlock
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
As technologies develop, manufacturers are making the process of unlocking a phone as user-friendly as possible. To unlock its new phone, Arkady's pet dog Mu-mu has to bark the password once. The phone represents a passw... | ```python
import sys
input = sys.stdin.readline
pwd = input().strip()
n = int(input())
fst, lst = False, False
arr = []
for i in range(n):
arr.append(input().strip())
for i in range(n):
wrd = arr[i]
if (wrd == pwd) or (pwd == (wrd[::-1])):
fst = True
lst = True
break... | 3 | |
803 | A | Maximal Binary Matrix | PROGRAMMING | 1,400 | [
"constructive algorithms"
] | null | null | You are given matrix with *n* rows and *n* columns filled with zeroes. You should put *k* ones in it in such a way that the resulting matrix is symmetrical with respect to the main diagonal (the diagonal that goes from the top left to the bottom right corner) and is lexicographically maximal.
One matrix is lexicograph... | The first line consists of two numbers *n* and *k* (1<=≤<=*n*<=≤<=100, 0<=≤<=*k*<=≤<=106). | If the answer exists then output resulting matrix. Otherwise output -1. | [
"2 1\n",
"3 2\n",
"2 5\n"
] | [
"1 0 \n0 0 \n",
"1 0 0 \n0 1 0 \n0 0 0 \n",
"-1\n"
] | none | 0 | [
{
"input": "2 1",
"output": "1 0 \n0 0 "
},
{
"input": "3 2",
"output": "1 0 0 \n0 1 0 \n0 0 0 "
},
{
"input": "2 5",
"output": "-1"
},
{
"input": "1 0",
"output": "0 "
},
{
"input": "1 1",
"output": "1 "
},
{
"input": "20 398",
"output": "1 1 1 1 ... | 1,698,676,770 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 30 | 0 | def create_symmetrical_matrix(n, k):
# Check if it is possible to create a symmetrical matrix
if k > (n * n + 1) // 2:
return -1
# Create an empty matrix filled with zeros
matrix = [[0] * n for _ in range(n)]
# Fill the matrix with ones symmetrically
row, col = 0, 0
... | Title: Maximal Binary Matrix
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given matrix with *n* rows and *n* columns filled with zeroes. You should put *k* ones in it in such a way that the resulting matrix is symmetrical with respect to the main diagonal (the diagonal that goes... | ```python
def create_symmetrical_matrix(n, k):
# Check if it is possible to create a symmetrical matrix
if k > (n * n + 1) // 2:
return -1
# Create an empty matrix filled with zeros
matrix = [[0] * n for _ in range(n)]
# Fill the matrix with ones symmetrically
row, col... | 0 | |
298 | B | Sail | PROGRAMMING | 1,200 | [
"brute force",
"greedy",
"implementation"
] | null | null | The polar bears are going fishing. They plan to sail from (*s**x*,<=*s**y*) to (*e**x*,<=*e**y*). However, the boat can only sail by wind. At each second, the wind blows in one of these directions: east, south, west or north. Assume the boat is currently at (*x*,<=*y*).
- If the wind blows to the east, the boat will ... | The first line contains five integers *t*,<=*s**x*,<=*s**y*,<=*e**x*,<=*e**y* (1<=≤<=*t*<=≤<=105,<=<=-<=109<=≤<=*s**x*,<=*s**y*,<=*e**x*,<=*e**y*<=≤<=109). The starting location and the ending location will be different.
The second line contains *t* characters, the *i*-th character is the wind blowing direction at the... | If they can reach (*e**x*,<=*e**y*) within *t* seconds, print the earliest time they can achieve it. Otherwise, print "-1" (without quotes). | [
"5 0 0 1 1\nSESNW\n",
"10 5 3 3 6\nNENSWESNEE\n"
] | [
"4\n",
"-1\n"
] | In the first sample, they can stay at seconds 1, 3, and move at seconds 2, 4.
In the second sample, they cannot sail to the destination. | 500 | [
{
"input": "5 0 0 1 1\nSESNW",
"output": "4"
},
{
"input": "10 5 3 3 6\nNENSWESNEE",
"output": "-1"
},
{
"input": "19 -172106364 -468680119 -172106365 -468680119\nSSEEESSSESESWSEESSS",
"output": "13"
},
{
"input": "39 -1000000000 -1000000000 -999999997 -1000000000\nENEENWSWSS... | 1,632,999,177 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 62 | 102,400 | from collections import Counter
def main():
t, sx, sy, ex, ey = map(int, input().split())
for i, dir in enumerate(input(), 1):
if dir == 'S':
sy -= 0
elif dir == 'N':
sy += 1
elif dir == 'W':
sx -= 1
elif dir == 'E':
sx += 1
... | Title: Sail
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The polar bears are going fishing. They plan to sail from (*s**x*,<=*s**y*) to (*e**x*,<=*e**y*). However, the boat can only sail by wind. At each second, the wind blows in one of these directions: east, south, west or north. Assu... | ```python
from collections import Counter
def main():
t, sx, sy, ex, ey = map(int, input().split())
for i, dir in enumerate(input(), 1):
if dir == 'S':
sy -= 0
elif dir == 'N':
sy += 1
elif dir == 'W':
sx -= 1
elif dir == 'E':
sx +... | 0 | |
435 | B | Pasha Maximizes | PROGRAMMING | 1,400 | [
"greedy"
] | null | null | Pasha has a positive integer *a* without leading zeroes. Today he decided that the number is too small and he should make it larger. Unfortunately, the only operation Pasha can do is to swap two adjacent decimal digits of the integer.
Help Pasha count the maximum number he can get if he has the time to make at most *k... | The single line contains two integers *a* and *k* (1<=≤<=*a*<=≤<=1018; 0<=≤<=*k*<=≤<=100). | Print the maximum number that Pasha can get if he makes at most *k* swaps. | [
"1990 1\n",
"300 0\n",
"1034 2\n",
"9090000078001234 6\n"
] | [
"9190\n",
"300\n",
"3104\n",
"9907000008001234\n"
] | none | 1,000 | [
{
"input": "1990 1",
"output": "9190"
},
{
"input": "300 0",
"output": "300"
},
{
"input": "1034 2",
"output": "3104"
},
{
"input": "9090000078001234 6",
"output": "9907000008001234"
},
{
"input": "1234 3",
"output": "4123"
},
{
"input": "5 100",
"... | 1,586,329,361 | 2,147,483,647 | PyPy 3 | OK | TESTS | 46 | 140 | 0 | def swap(s,j,k):
t=s[j]
s[j]=s[k]
s[k]=t
s,k = map(str,input().split())
k=int(k)
s=list(s)
n=len(s)
for i in range(len(s)):
max = i
for j in range(i+1,n):
if s[j]>s[max] and j-i<=k :
max = j
for j in range(max , i ,-1):
swap(s,j,j-1)
k... | Title: Pasha Maximizes
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Pasha has a positive integer *a* without leading zeroes. Today he decided that the number is too small and he should make it larger. Unfortunately, the only operation Pasha can do is to swap two adjacent decimal digits ... | ```python
def swap(s,j,k):
t=s[j]
s[j]=s[k]
s[k]=t
s,k = map(str,input().split())
k=int(k)
s=list(s)
n=len(s)
for i in range(len(s)):
max = i
for j in range(i+1,n):
if s[j]>s[max] and j-i<=k :
max = j
for j in range(max , i ,-1):
swap(s,j,j... | 3 | |
607 | B | Zuma | PROGRAMMING | 1,900 | [
"dp"
] | null | null | Genos recently installed the game Zuma on his phone. In Zuma there exists a line of *n* gemstones, the *i*-th of which has color *c**i*. The goal of the game is to destroy all the gemstones in the line as quickly as possible.
In one second, Genos is able to choose exactly one continuous substring of colored gemstones ... | The first line of input contains a single integer *n* (1<=≤<=*n*<=≤<=500) — the number of gemstones.
The second line contains *n* space-separated integers, the *i*-th of which is *c**i* (1<=≤<=*c**i*<=≤<=*n*) — the color of the *i*-th gemstone in a line. | Print a single integer — the minimum number of seconds needed to destroy the entire line. | [
"3\n1 2 1\n",
"3\n1 2 3\n",
"7\n1 4 4 2 3 2 1\n"
] | [
"1\n",
"3\n",
"2\n"
] | In the first sample, Genos can destroy the entire line in one second.
In the second sample, Genos can only destroy one gemstone at a time, so destroying three gemstones takes three seconds.
In the third sample, to achieve the optimal time of two seconds, destroy palindrome 4 4 first and then destroy palindrome 1 2 3 ... | 1,250 | [
{
"input": "3\n1 2 1",
"output": "1"
},
{
"input": "3\n1 2 3",
"output": "3"
},
{
"input": "7\n1 4 4 2 3 2 1",
"output": "2"
},
{
"input": "1\n1",
"output": "1"
},
{
"input": "2\n1 1",
"output": "1"
},
{
"input": "2\n1 2",
"output": "2"
},
{
... | 1,536,539,254 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 7 | 140 | 2,969,600 | from sys import stdin
n=int(input())
s=list(map(int,stdin.readline().strip().split()))
dp=[[-1 for i in range(501)] for j in range(500)]
dp1=[[False for i in range(501)] for j in range(500)]
suf=[1 for i in range(n)]
pref=[1 for i in range(n)]
for i in range(n-1,-1,-1):
for j in range(i+1,n):
if s... | Title: Zuma
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Genos recently installed the game Zuma on his phone. In Zuma there exists a line of *n* gemstones, the *i*-th of which has color *c**i*. The goal of the game is to destroy all the gemstones in the line as quickly as possible.
In ... | ```python
from sys import stdin
n=int(input())
s=list(map(int,stdin.readline().strip().split()))
dp=[[-1 for i in range(501)] for j in range(500)]
dp1=[[False for i in range(501)] for j in range(500)]
suf=[1 for i in range(n)]
pref=[1 for i in range(n)]
for i in range(n-1,-1,-1):
for j in range(i+1,n):
... | 0 | |
32 | B | Borze | PROGRAMMING | 800 | [
"expression parsing",
"implementation"
] | B. Borze | 2 | 256 | Ternary numeric notation is quite popular in Berland. To telegraph the ternary number the Borze alphabet is used. Digit 0 is transmitted as «.», 1 as «-.» and 2 as «--». You are to decode the Borze code, i.e. to find out the ternary number given its representation in Borze alphabet. | The first line contains a number in Borze code. The length of the string is between 1 and 200 characters. It's guaranteed that the given string is a valid Borze code of some ternary number (this number can have leading zeroes). | Output the decoded ternary number. It can have leading zeroes. | [
".-.--\n",
"--.\n",
"-..-.--\n"
] | [
"012",
"20",
"1012"
] | none | 1,000 | [
{
"input": ".-.--",
"output": "012"
},
{
"input": "--.",
"output": "20"
},
{
"input": "-..-.--",
"output": "1012"
},
{
"input": "---..",
"output": "210"
},
{
"input": "..--.---..",
"output": "0020210"
},
{
"input": "-.....----.",
"output": "1000022... | 1,693,379,691 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 92 | 0 | n = list(input())
numlist = []
for i in range(len(n)):
if n[i] == '.':
numlist.append('0')
elif n[i] == '-' and n[i+1] == '.':
numlist.append('1')
n[i+1] = 'L'
elif n[i] == '-' and n[i+1] == '-':
numlist.append('2')
n[i+1] = 'L'
print(''.join(numlist)) | Title: Borze
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Ternary numeric notation is quite popular in Berland. To telegraph the ternary number the Borze alphabet is used. Digit 0 is transmitted as «.», 1 as «-.» and 2 as «--». You are to decode the Borze code, i.e. to find out the ternary ... | ```python
n = list(input())
numlist = []
for i in range(len(n)):
if n[i] == '.':
numlist.append('0')
elif n[i] == '-' and n[i+1] == '.':
numlist.append('1')
n[i+1] = 'L'
elif n[i] == '-' and n[i+1] == '-':
numlist.append('2')
n[i+1] = 'L'
print(''.join(numl... | 3.977 |
228 | A | Is your horseshoe on the other hoof? | PROGRAMMING | 800 | [
"implementation"
] | null | null | Valera the Horse is going to the party with friends. He has been following the fashion trends for a while, and he knows that it is very popular to wear all horseshoes of different color. Valera has got four horseshoes left from the last year, but maybe some of them have the same color. In this case he needs to go to th... | The first line contains four space-separated integers *s*1,<=*s*2,<=*s*3,<=*s*4 (1<=≤<=*s*1,<=*s*2,<=*s*3,<=*s*4<=≤<=109) — the colors of horseshoes Valera has.
Consider all possible colors indexed with integers. | Print a single integer — the minimum number of horseshoes Valera needs to buy. | [
"1 7 3 3\n",
"7 7 7 7\n"
] | [
"1\n",
"3\n"
] | none | 500 | [
{
"input": "1 7 3 3",
"output": "1"
},
{
"input": "7 7 7 7",
"output": "3"
},
{
"input": "81170865 673572653 756938629 995577259",
"output": "0"
},
{
"input": "3491663 217797045 522540872 715355328",
"output": "0"
},
{
"input": "251590420 586975278 916631563 58697... | 1,690,089,111 | 2,147,483,647 | Python 3 | OK | TESTS | 34 | 92 | 0 | s1, s2, s3, s4 = map(int, input().split())
l = []
l.append(s1)
l.append(s2)
l.append(s3)
l.append(s4)
counter = 0
for x in range(len(l)):
for y in range(x + 1, len(l)):
if l[x] == l[y]:
counter += 1
break
print(counter)
| Title: Is your horseshoe on the other hoof?
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Valera the Horse is going to the party with friends. He has been following the fashion trends for a while, and he knows that it is very popular to wear all horseshoes of different color. Valera has ... | ```python
s1, s2, s3, s4 = map(int, input().split())
l = []
l.append(s1)
l.append(s2)
l.append(s3)
l.append(s4)
counter = 0
for x in range(len(l)):
for y in range(x + 1, len(l)):
if l[x] == l[y]:
counter += 1
break
print(counter)
``` | 3 | |
109 | A | Lucky Sum of Digits | PROGRAMMING | 1,000 | [
"brute force",
"implementation"
] | A. Lucky Sum of Digits | 2 | 256 | Petya loves lucky numbers. We all know that lucky numbers are the positive integers whose decimal representations contain only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.
Petya wonders eagerly what minimum lucky number has the sum of digits equal to *n*. Help him cope wi... | The single line contains an integer *n* (1<=≤<=*n*<=≤<=106) — the sum of digits of the required lucky number. | Print on the single line the result — the minimum lucky number, whose sum of digits equals *n*. If such number does not exist, print -1. | [
"11\n",
"10\n"
] | [
"47\n",
"-1\n"
] | none | 500 | [
{
"input": "11",
"output": "47"
},
{
"input": "10",
"output": "-1"
},
{
"input": "64",
"output": "4477777777"
},
{
"input": "1",
"output": "-1"
},
{
"input": "4",
"output": "4"
},
{
"input": "7",
"output": "7"
},
{
"input": "12",
"outpu... | 1,589,156,740 | 2,147,483,647 | Python 3 | OK | TESTS | 51 | 310 | 6,963,200 | from sys import *
n=int(input())
for i in range((n//4)+1):
res=n-4*i
if res%7==0:
j=res//7
print("4"*i+"7"*j)
exit()
print(-1)
| Title: Lucky Sum of Digits
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Petya loves lucky numbers. We all know that lucky numbers are the positive integers whose decimal representations contain only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.
... | ```python
from sys import *
n=int(input())
for i in range((n//4)+1):
res=n-4*i
if res%7==0:
j=res//7
print("4"*i+"7"*j)
exit()
print(-1)
``` | 3.90953 |
4 | C | Registration System | PROGRAMMING | 1,300 | [
"data structures",
"hashing",
"implementation"
] | C. Registration system | 5 | 64 | A new e-mail service "Berlandesk" is going to be opened in Berland in the near future. The site administration wants to launch their project as soon as possible, that's why they ask you to help. You're suggested to implement the prototype of site registration system. The system should work on the following principle.
... | The first line contains number *n* (1<=≤<=*n*<=≤<=105). The following *n* lines contain the requests to the system. Each request is a non-empty line, and consists of not more than 32 characters, which are all lowercase Latin letters. | Print *n* lines, which are system responses to the requests: OK in case of successful registration, or a prompt with a new name, if the requested name is already taken. | [
"4\nabacaba\nacaba\nabacaba\nacab\n",
"6\nfirst\nfirst\nsecond\nsecond\nthird\nthird\n"
] | [
"OK\nOK\nabacaba1\nOK\n",
"OK\nfirst1\nOK\nsecond1\nOK\nthird1\n"
] | none | 0 | [
{
"input": "4\nabacaba\nacaba\nabacaba\nacab",
"output": "OK\nOK\nabacaba1\nOK"
},
{
"input": "6\nfirst\nfirst\nsecond\nsecond\nthird\nthird",
"output": "OK\nfirst1\nOK\nsecond1\nOK\nthird1"
},
{
"input": "1\nn",
"output": "OK"
},
{
"input": "2\nu\nu",
"output": "OK\nu1"
... | 1,688,483,263 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | t = int(input())
dictionary = dict()
for i in range(t):
x = input()
if x in t:
t[x] += 1
print(x += str(t[x]-1))
else:
t[x] = 1
print('OK')
| Title: Registration System
Time Limit: 5 seconds
Memory Limit: 64 megabytes
Problem Description:
A new e-mail service "Berlandesk" is going to be opened in Berland in the near future. The site administration wants to launch their project as soon as possible, that's why they ask you to help. You're suggested to imple... | ```python
t = int(input())
dictionary = dict()
for i in range(t):
x = input()
if x in t:
t[x] += 1
print(x += str(t[x]-1))
else:
t[x] = 1
print('OK')
``` | -1 |
57 | A | Square Earth? | PROGRAMMING | 1,300 | [
"dfs and similar",
"greedy",
"implementation"
] | A. Square Earth? | 2 | 256 | Meg the Rabbit decided to do something nice, specifically — to determine the shortest distance between two points on the surface of our planet. But Meg... what can you say, she wants everything simple. So, she already regards our planet as a two-dimensional circle. No, wait, it's even worse — as a square of side *n*. T... | The single line contains 5 space-separated integers: *n*,<=*x*1,<=*y*1,<=*x*2,<=*y*2 (1<=≤<=*n*<=≤<=1000,<=0<=≤<=*x*1,<=*y*1,<=*x*2,<=*y*2<=≤<=*n*) which correspondingly represent a side of the square, the coordinates of the first point and the coordinates of the second point. It is guaranteed that the points lie on th... | You must print on a single line the shortest distance between the points. | [
"2 0 0 1 0\n",
"2 0 1 2 1\n",
"100 0 0 100 100\n"
] | [
"1\n",
"4\n",
"200\n"
] | none | 500 | [
{
"input": "2 0 0 1 0",
"output": "1"
},
{
"input": "2 0 1 2 1",
"output": "4"
},
{
"input": "100 0 0 100 100",
"output": "200"
},
{
"input": "4 0 3 1 4",
"output": "2"
},
{
"input": "10 8 10 10 0",
"output": "12"
},
{
"input": "26 21 0 26 14",
"ou... | 1,515,773,133 | 2,147,483,647 | Python 3 | OK | TESTS | 55 | 124 | 5,632,000 | def dis(x,y,d):
if y==0 or x==d:
return x+y
else:
return 4*d - x - y
d,x1,y1,x2,y2 = map(int, input().split())
a = abs(dis(x1,y1,d) - dis(x2,y2,d))
print(min(a, 4*d-a)) | Title: Square Earth?
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Meg the Rabbit decided to do something nice, specifically — to determine the shortest distance between two points on the surface of our planet. But Meg... what can you say, she wants everything simple. So, she already regards... | ```python
def dis(x,y,d):
if y==0 or x==d:
return x+y
else:
return 4*d - x - y
d,x1,y1,x2,y2 = map(int, input().split())
a = abs(dis(x1,y1,d) - dis(x2,y2,d))
print(min(a, 4*d-a))
``` | 3.95851 |
628 | C | Bear and String Distance | PROGRAMMING | 1,300 | [
"greedy",
"strings"
] | null | null | Limak is a little polar bear. He likes nice strings — strings of length *n*, consisting of lowercase English letters only.
The distance between two letters is defined as the difference between their positions in the alphabet. For example, , and .
Also, the distance between two nice strings is defined as the sum of di... | The first line contains two integers *n* and *k* (1<=≤<=*n*<=≤<=105, 0<=≤<=*k*<=≤<=106).
The second line contains a string *s* of length *n*, consisting of lowercase English letters. | If there is no string satisfying the given conditions then print "-1" (without the quotes).
Otherwise, print any nice string *s*' that . | [
"4 26\nbear\n",
"2 7\naf\n",
"3 1000\nhey\n"
] | [
"roar",
"db\n",
"-1\n"
] | none | 0 | [
{
"input": "4 26\nbear",
"output": "zcar"
},
{
"input": "2 7\naf",
"output": "hf"
},
{
"input": "3 1000\nhey",
"output": "-1"
},
{
"input": "5 50\nkzsij",
"output": "zaiij"
},
{
"input": "5 500\nvsdxg",
"output": "-1"
},
{
"input": "1 0\na",
"outpu... | 1,693,488,480 | 2,147,483,647 | PyPy 3-64 | RUNTIME_ERROR | TESTS | 0 | 77 | 2,764,800 | import io,os
def solve(n,s,k):
ans = ""
f = 0
for i in range(n):
val = ord('z')-ord(s[i])
if(k == val):
ans += 'z'
ans += s[i+1:]
f = 1
break
elif(k < val):
ans += chr(ord(s[i]) + k)
ans += s[i+1:]
f... | Title: Bear and String Distance
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Limak is a little polar bear. He likes nice strings — strings of length *n*, consisting of lowercase English letters only.
The distance between two letters is defined as the difference between their positions ... | ```python
import io,os
def solve(n,s,k):
ans = ""
f = 0
for i in range(n):
val = ord('z')-ord(s[i])
if(k == val):
ans += 'z'
ans += s[i+1:]
f = 1
break
elif(k < val):
ans += chr(ord(s[i]) + k)
ans += s[i+1:]
... | -1 | |
300 | C | Beautiful Numbers | PROGRAMMING | 1,800 | [
"brute force",
"combinatorics"
] | null | null | Vitaly is a very weird man. He's got two favorite digits *a* and *b*. Vitaly calls a positive integer good, if the decimal representation of this integer only contains digits *a* and *b*. Vitaly calls a good number excellent, if the sum of its digits is a good number.
For example, let's say that Vitaly's favourite dig... | The first line contains three integers: *a*, *b*, *n* (1<=≤<=*a*<=<<=*b*<=≤<=9,<=1<=≤<=*n*<=≤<=106). | Print a single integer — the answer to the problem modulo 1000000007 (109<=+<=7). | [
"1 3 3\n",
"2 3 10\n"
] | [
"1\n",
"165\n"
] | none | 2,000 | [
{
"input": "1 3 3",
"output": "1"
},
{
"input": "2 3 10",
"output": "165"
},
{
"input": "6 8 14215",
"output": "651581472"
},
{
"input": "4 9 104671",
"output": "329390901"
},
{
"input": "6 7 78755",
"output": "0"
},
{
"input": "1 8 265",
"output":... | 1,634,265,662 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 3 | 2,000 | 1,433,600 | from math import comb
def good(a, b, n):
for num in str(n):
if (num != str(a) and num != str(b)):
return False
return True
def beauty(a, b, n):
num = n*b
qtd = 0
pos = [False] * (n+1)
for i in range (n+1):
if good(a, b, num):
p... | Title: Beautiful Numbers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vitaly is a very weird man. He's got two favorite digits *a* and *b*. Vitaly calls a positive integer good, if the decimal representation of this integer only contains digits *a* and *b*. Vitaly calls a good number ex... | ```python
from math import comb
def good(a, b, n):
for num in str(n):
if (num != str(a) and num != str(b)):
return False
return True
def beauty(a, b, n):
num = n*b
qtd = 0
pos = [False] * (n+1)
for i in range (n+1):
if good(a, b, num):
... | 0 | |
916 | A | Jamie and Alarm Snooze | PROGRAMMING | 900 | [
"brute force",
"implementation",
"math"
] | null | null | Jamie loves sleeping. One day, he decides that he needs to wake up at exactly *hh*:<=*mm*. However, he hates waking up, so he wants to make waking up less painful by setting the alarm at a lucky time. He will then press the snooze button every *x* minutes until *hh*:<=*mm* is reached, and only then he will wake up. He ... | The first line contains a single integer *x* (1<=≤<=*x*<=≤<=60).
The second line contains two two-digit integers, *hh* and *mm* (00<=≤<=*hh*<=≤<=23,<=00<=≤<=*mm*<=≤<=59). | Print the minimum number of times he needs to press the button. | [
"3\n11 23\n",
"5\n01 07\n"
] | [
"2\n",
"0\n"
] | In the first sample, Jamie needs to wake up at 11:23. So, he can set his alarm at 11:17. He would press the snooze button when the alarm rings at 11:17 and at 11:20.
In the second sample, Jamie can set his alarm at exactly at 01:07 which is lucky. | 500 | [
{
"input": "3\n11 23",
"output": "2"
},
{
"input": "5\n01 07",
"output": "0"
},
{
"input": "34\n09 24",
"output": "3"
},
{
"input": "2\n14 37",
"output": "0"
},
{
"input": "14\n19 54",
"output": "9"
},
{
"input": "42\n15 44",
"output": "12"
},
... | 1,516,420,160 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 16 | 77 | 5,632,000 | def haveseven(a):
return ((a % 10 == 7) or (int(a/10) == 7))
x = int(input())
hh, mm = map(int, input().split())
if (haveseven(hh) or haveseven(mm)):
print("0")
exit()
cnt = 1
while (True):
if (mm - x <= 0):
mm = mm - x + 60
if (mm == 60):
mm = 0
... | Title: Jamie and Alarm Snooze
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Jamie loves sleeping. One day, he decides that he needs to wake up at exactly *hh*:<=*mm*. However, he hates waking up, so he wants to make waking up less painful by setting the alarm at a lucky time. He will the... | ```python
def haveseven(a):
return ((a % 10 == 7) or (int(a/10) == 7))
x = int(input())
hh, mm = map(int, input().split())
if (haveseven(hh) or haveseven(mm)):
print("0")
exit()
cnt = 1
while (True):
if (mm - x <= 0):
mm = mm - x + 60
if (mm == 60):
mm = 0... | 0 | |
807 | A | Is it rated? | PROGRAMMING | 900 | [
"implementation",
"sortings"
] | null | null | Is it rated?
Here it is. The Ultimate Question of Competitive Programming, Codeforces, and Everything. And you are here to answer it.
Another Codeforces round has been conducted. No two participants have the same number of points. For each participant, from the top to the bottom of the standings, their rating before ... | The first line contains a single integer *n* (2<=≤<=*n*<=≤<=1000) — the number of round participants.
Each of the next *n* lines contains two integers *a**i* and *b**i* (1<=≤<=*a**i*,<=*b**i*<=≤<=4126) — the rating of the *i*-th participant before and after the round, respectively. The participants are listed in order... | If the round is rated for sure, print "rated". If the round is unrated for sure, print "unrated". If it's impossible to determine whether the round is rated or not, print "maybe". | [
"6\n3060 3060\n2194 2194\n2876 2903\n2624 2624\n3007 2991\n2884 2884\n",
"4\n1500 1500\n1300 1300\n1200 1200\n1400 1400\n",
"5\n3123 3123\n2777 2777\n2246 2246\n2246 2246\n1699 1699\n"
] | [
"rated\n",
"unrated\n",
"maybe\n"
] | In the first example, the ratings of the participants in the third and fifth places have changed, therefore, the round was rated.
In the second example, no one's rating has changed, but the participant in the second place has lower rating than the participant in the fourth place. Therefore, if the round was rated, som... | 500 | [
{
"input": "6\n3060 3060\n2194 2194\n2876 2903\n2624 2624\n3007 2991\n2884 2884",
"output": "rated"
},
{
"input": "4\n1500 1500\n1300 1300\n1200 1200\n1400 1400",
"output": "unrated"
},
{
"input": "5\n3123 3123\n2777 2777\n2246 2246\n2246 2246\n1699 1699",
"output": "maybe"
},
{
... | 1,595,832,005 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | #include<bits/stdc++.h>
using namespace std;
#define ll long long
#define f(i,a,b) for(ll i=a; i<b; i++)
bool sortedd(ll a[],ll n){
f(i,0,n-1)if(a[i]<a[i+1]) return false;
return true;
}
int main(){
ll n; cin>>n; bool rated=false;
ll a[n]; f(i,0,n){
ll x,y; cin>>x>>y; a[i]=x; if(x!=y)... | Title: Is it rated?
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Is it rated?
Here it is. The Ultimate Question of Competitive Programming, Codeforces, and Everything. And you are here to answer it.
Another Codeforces round has been conducted. No two participants have the same number ... | ```python
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define f(i,a,b) for(ll i=a; i<b; i++)
bool sortedd(ll a[],ll n){
f(i,0,n-1)if(a[i]<a[i+1]) return false;
return true;
}
int main(){
ll n; cin>>n; bool rated=false;
ll a[n]; f(i,0,n){
ll x,y; cin>>x>>y; a[i]=x... | -1 | |
361 | B | Levko and Permutation | PROGRAMMING | 1,200 | [
"constructive algorithms",
"math",
"number theory"
] | null | null | Levko loves permutations very much. A permutation of length *n* is a sequence of distinct positive integers, each is at most *n*.
Let’s assume that value *gcd*(*a*,<=*b*) shows the greatest common divisor of numbers *a* and *b*. Levko assumes that element *p**i* of permutation *p*1,<=*p*2,<=... ,<=*p**n* is good if *g... | The single line contains two integers *n* and *k* (1<=≤<=*n*<=≤<=105, 0<=≤<=*k*<=≤<=*n*). | In a single line print either any beautiful permutation or -1, if such permutation doesn’t exist.
If there are multiple suitable permutations, you are allowed to print any of them. | [
"4 2\n",
"1 1\n"
] | [
"2 4 3 1",
"-1\n"
] | In the first sample elements 4 and 3 are good because *gcd*(2, 4) = 2 > 1 and *gcd*(3, 3) = 3 > 1. Elements 2 and 1 are not good because *gcd*(1, 2) = 1 and *gcd*(4, 1) = 1. As there are exactly 2 good elements, the permutation is beautiful.
The second sample has no beautiful permutations. | 1,000 | [
{
"input": "4 2",
"output": "2 1 3 4 "
},
{
"input": "1 1",
"output": "-1"
},
{
"input": "7 4",
"output": "3 1 2 4 5 6 7 "
},
{
"input": "10 9",
"output": "1 2 3 4 5 6 7 8 9 10 "
},
{
"input": "10000 5000",
"output": "5000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1... | 1,601,311,280 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 5 | 139 | 2,969,600 |
[n, k] = list(map(int, input().split(" ")))
if k == n-1:
for i in range(1, n+1):
print(i, end=" ")
print("")
elif k < n-1:
beauts = 0
numI = 2
nums = []
nums.append(n)
for i in range(1, n-1):
if beauts < k:
nums.append(numI)
beauts += 1
i... | Title: Levko and Permutation
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Levko loves permutations very much. A permutation of length *n* is a sequence of distinct positive integers, each is at most *n*.
Let’s assume that value *gcd*(*a*,<=*b*) shows the greatest common divisor of numb... | ```python
[n, k] = list(map(int, input().split(" ")))
if k == n-1:
for i in range(1, n+1):
print(i, end=" ")
print("")
elif k < n-1:
beauts = 0
numI = 2
nums = []
nums.append(n)
for i in range(1, n-1):
if beauts < k:
nums.append(numI)
beauts += 1
... | 0 | |
472 | A | Design Tutorial: Learn from Math | PROGRAMMING | 800 | [
"math",
"number theory"
] | null | null | One way to create a task is to learn from math. You can generate some random math statement or modify some theorems to get something new and build a new task from that.
For example, there is a statement called the "Goldbach's conjecture". It says: "each even number no less than four can be expressed as the sum of two ... | The only line contains an integer *n* (12<=≤<=*n*<=≤<=106). | Output two composite integers *x* and *y* (1<=<<=*x*,<=*y*<=<<=*n*) such that *x*<=+<=*y*<==<=*n*. If there are multiple solutions, you can output any of them. | [
"12\n",
"15\n",
"23\n",
"1000000\n"
] | [
"4 8\n",
"6 9\n",
"8 15\n",
"500000 500000\n"
] | In the first example, 12 = 4 + 8 and both 4, 8 are composite numbers. You can output "6 6" or "8 4" as well.
In the second example, 15 = 6 + 9. Note that you can't output "1 14" because 1 is not a composite number. | 500 | [
{
"input": "12",
"output": "4 8"
},
{
"input": "15",
"output": "6 9"
},
{
"input": "23",
"output": "8 15"
},
{
"input": "1000000",
"output": "500000 500000"
},
{
"input": "63874",
"output": "4 63870"
},
{
"input": "14568",
"output": "4 14564"
},
... | 1,681,755,484 | 2,147,483,647 | Python 3 | OK | TESTS | 33 | 202 | 0 | n = int(input())
x = 4
y = 0
i = 9
if n%2 == 0:
y += (n - 4)
else:
while x < n:
if (x + i) == n:
y += i
break
else:
x += 2
ans = str(x)+' '+str(y)
print(ans) | Title: Design Tutorial: Learn from Math
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One way to create a task is to learn from math. You can generate some random math statement or modify some theorems to get something new and build a new task from that.
For example, there is a statemen... | ```python
n = int(input())
x = 4
y = 0
i = 9
if n%2 == 0:
y += (n - 4)
else:
while x < n:
if (x + i) == n:
y += i
break
else:
x += 2
ans = str(x)+' '+str(y)
print(ans)
``` | 3 | |
912 | B | New Year's Eve | PROGRAMMING | 1,300 | [
"bitmasks",
"constructive algorithms",
"number theory"
] | null | null | Since Grisha behaved well last year, at New Year's Eve he was visited by Ded Moroz who brought an enormous bag of gifts with him! The bag contains *n* sweet candies from the good ol' bakery, each labeled from 1 to *n* corresponding to its tastiness. No two candies have the same tastiness.
The choice of candies has a d... | The sole string contains two integers *n* and *k* (1<=≤<=*k*<=≤<=*n*<=≤<=1018). | Output one number — the largest possible xor-sum. | [
"4 3\n",
"6 6\n"
] | [
"7\n",
"7\n"
] | In the first sample case, one optimal answer is 1, 2 and 4, giving the xor-sum of 7.
In the second sample case, one can, for example, take all six candies and obtain the xor-sum of 7. | 1,000 | [
{
"input": "4 3",
"output": "7"
},
{
"input": "6 6",
"output": "7"
},
{
"input": "2 2",
"output": "3"
},
{
"input": "1022 10",
"output": "1023"
},
{
"input": "415853337373441 52",
"output": "562949953421311"
},
{
"input": "75 12",
"output": "127"
... | 1,687,777,212 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | def largest_xor_sum(n, k):
if k == 1:
return n
elif k == 2:
return n | (n - 1)
else:
return (1 << n) - 1
# Read input values
n, k = map(int, input().split())
# Call the function and print the result
print(largest_xor_sum(n, k))
| Title: New Year's Eve
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Since Grisha behaved well last year, at New Year's Eve he was visited by Ded Moroz who brought an enormous bag of gifts with him! The bag contains *n* sweet candies from the good ol' bakery, each labeled from 1 to *n* co... | ```python
def largest_xor_sum(n, k):
if k == 1:
return n
elif k == 2:
return n | (n - 1)
else:
return (1 << n) - 1
# Read input values
n, k = map(int, input().split())
# Call the function and print the result
print(largest_xor_sum(n, k))
``` | 0 | |
743 | C | Vladik and fractions | PROGRAMMING | 1,500 | [
"brute force",
"constructive algorithms",
"math",
"number theory"
] | null | null | Vladik and Chloe decided to determine who of them is better at math. Vladik claimed that for any positive integer *n* he can represent fraction as a sum of three distinct positive fractions in form .
Help Vladik with that, i.e for a given *n* find three distinct positive integers *x*, *y* and *z* such that . Because ... | The single line contains single integer *n* (1<=≤<=*n*<=≤<=104). | If the answer exists, print 3 distinct numbers *x*, *y* and *z* (1<=≤<=*x*,<=*y*,<=*z*<=≤<=109, *x*<=≠<=*y*, *x*<=≠<=*z*, *y*<=≠<=*z*). Otherwise print -1.
If there are multiple answers, print any of them. | [
"3\n",
"7\n"
] | [
"2 7 42\n",
"7 8 56\n"
] | none | 1,250 | [
{
"input": "3",
"output": "2 7 42"
},
{
"input": "7",
"output": "7 8 56"
},
{
"input": "2",
"output": "2 3 6"
},
{
"input": "5",
"output": "5 6 30"
},
{
"input": "4",
"output": "4 5 20"
},
{
"input": "7",
"output": "7 8 56"
},
{
"input": "8... | 1,600,867,779 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 12 | 140 | 0 | import io, os
input = io.BytesIO(os.read(0,os.fstat(0).st_size)).readline
R = lambda : map(int, input().split())
n = int(input())
print(n * (n + 1), n + 1, n)
| Title: Vladik and fractions
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vladik and Chloe decided to determine who of them is better at math. Vladik claimed that for any positive integer *n* he can represent fraction as a sum of three distinct positive fractions in form .
Help Vladik ... | ```python
import io, os
input = io.BytesIO(os.read(0,os.fstat(0).st_size)).readline
R = lambda : map(int, input().split())
n = int(input())
print(n * (n + 1), n + 1, n)
``` | 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"
},
{
... | 1,699,730,494 | 2,147,483,647 | Python 3 | OK | TESTS | 56 | 46 | 0 | s = input()
c = True
for i in range (1, len(s)):
if s[i].islower():
c = False
if c:
for j in range(len(s)):
if s[j].islower():
u = s[j].upper()
else:
u = s[j].lower()
print(u, end="")
else:
print(s)
| 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
s = input()
c = True
for i in range (1, len(s)):
if s[i].islower():
c = False
if c:
for j in range(len(s)):
if s[j].islower():
u = s[j].upper()
else:
u = s[j].lower()
print(u, end="")
else:
print(s)
``` | 3 | |
846 | A | Curriculum Vitae | PROGRAMMING | 1,500 | [
"brute force",
"implementation"
] | null | null | Hideo Kojima has just quit his job at Konami. Now he is going to find a new place to work. Despite being such a well-known person, he still needs a CV to apply for a job.
During all his career Hideo has produced *n* games. Some of them were successful, some were not. Hideo wants to remove several of them (possibly zer... | The first line contains one integer number *n* (1<=≤<=*n*<=≤<=100).
The second line contains *n* space-separated integer numbers *s*1,<=*s*2,<=...,<=*s**n* (0<=≤<=*s**i*<=≤<=1). 0 corresponds to an unsuccessful game, 1 — to a successful one. | Print one integer — the maximum number of games Hideo can leave in his CV so that no unsuccessful game comes after a successful one. | [
"4\n1 1 0 1\n",
"6\n0 1 0 0 1 0\n",
"1\n0\n"
] | [
"3\n",
"4\n",
"1\n"
] | none | 0 | [
{
"input": "4\n1 1 0 1",
"output": "3"
},
{
"input": "6\n0 1 0 0 1 0",
"output": "4"
},
{
"input": "1\n0",
"output": "1"
},
{
"input": "100\n0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0... | 1,533,522,283 | 2,147,483,647 | Python 3 | OK | TESTS | 18 | 109 | 0 | ##n = int(input())
##a = list(map(int, input().split()))
##print(' '.join(map(str, res)))
N = 107
n = int(input())
a = list(map(int, input().split()))
a.insert(0, 0)
f = [[0 for j in range(N)] for i in range(N)]
f[0][0] = 0
f[1][0] = 0
f[1][1] = 1
for i in range(2, n+1):
for j in range(i):
... | Title: Curriculum Vitae
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Hideo Kojima has just quit his job at Konami. Now he is going to find a new place to work. Despite being such a well-known person, he still needs a CV to apply for a job.
During all his career Hideo has produced *n* g... | ```python
##n = int(input())
##a = list(map(int, input().split()))
##print(' '.join(map(str, res)))
N = 107
n = int(input())
a = list(map(int, input().split()))
a.insert(0, 0)
f = [[0 for j in range(N)] for i in range(N)]
f[0][0] = 0
f[1][0] = 0
f[1][1] = 1
for i in range(2, n+1):
for j in range(i):... | 3 | |
59 | A | Word | PROGRAMMING | 800 | [
"implementation",
"strings"
] | A. Word | 2 | 256 | Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it either only consisted of lowercase letters or, vice versa, only of uppercase ones. At th... | The first line contains a word *s* — it consists of uppercase and lowercase Latin letters and possesses the length from 1 to 100. | Print the corrected word *s*. If the given word *s* has strictly more uppercase letters, make the word written in the uppercase register, otherwise - in the lowercase one. | [
"HoUse\n",
"ViP\n",
"maTRIx\n"
] | [
"house\n",
"VIP\n",
"matrix\n"
] | none | 500 | [
{
"input": "HoUse",
"output": "house"
},
{
"input": "ViP",
"output": "VIP"
},
{
"input": "maTRIx",
"output": "matrix"
},
{
"input": "BNHWpnpawg",
"output": "bnhwpnpawg"
},
{
"input": "VTYGP",
"output": "VTYGP"
},
{
"input": "CHNenu",
"output": "chn... | 1,681,674,903 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 122 | 0 | n=input().strip()
s=0
for i in range(len(n)):
if n[i].isupper():
s+=1
else:
s-=1
if s>0:
print(n.upper())
elif s<=0:
print(n.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
n=input().strip()
s=0
for i in range(len(n)):
if n[i].isupper():
s+=1
else:
s-=1
if s>0:
print(n.upper())
elif s<=0:
print(n.lower())
``` | 3.9695 |
500 | A | New Year Transportation | PROGRAMMING | 1,000 | [
"dfs and similar",
"graphs",
"implementation"
] | null | null | New Year is coming in Line World! In this world, there are *n* cells numbered by integers from 1 to *n*, as a 1<=×<=*n* board. People live in cells. However, it was hard to move between distinct cells, because of the difficulty of escaping the cell. People wanted to meet people who live in other cells.
So, user tncks0... | The first line contains two space-separated integers *n* (3<=≤<=*n*<=≤<=3<=×<=104) and *t* (2<=≤<=*t*<=≤<=*n*) — the number of cells, and the index of the cell which I want to go to.
The second line contains *n*<=-<=1 space-separated integers *a*1,<=*a*2,<=...,<=*a**n*<=-<=1 (1<=≤<=*a**i*<=≤<=*n*<=-<=*i*). It is guara... | If I can go to cell *t* using the transportation system, print "YES". Otherwise, print "NO". | [
"8 4\n1 2 1 2 1 2 1\n",
"8 5\n1 2 1 2 1 1 1\n"
] | [
"YES\n",
"NO\n"
] | In the first sample, the visited cells are: 1, 2, 4; so we can successfully visit the cell 4.
In the second sample, the possible cells to visit are: 1, 2, 4, 6, 7, 8; so we can't visit the cell 5, which we want to visit. | 500 | [
{
"input": "8 4\n1 2 1 2 1 2 1",
"output": "YES"
},
{
"input": "8 5\n1 2 1 2 1 1 1",
"output": "NO"
},
{
"input": "20 19\n13 16 7 6 12 1 5 7 8 6 5 7 5 5 3 3 2 2 1",
"output": "YES"
},
{
"input": "50 49\n11 7 1 41 26 36 19 16 38 14 36 35 37 27 20 27 3 6 21 2 27 11 18 17 19 16 ... | 1,651,468,934 | 2,147,483,647 | Python 3 | OK | TESTS | 34 | 46 | 1,433,600 | n, t = map(int, input().split())
a = list(map(int, input().split()))
res = 0
while res < t-1:
res += a[res]
if res == t-1:
print('YES')
else:
print('NO')
| Title: New Year Transportation
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
New Year is coming in Line World! In this world, there are *n* cells numbered by integers from 1 to *n*, as a 1<=×<=*n* board. People live in cells. However, it was hard to move between distinct cells, because o... | ```python
n, t = map(int, input().split())
a = list(map(int, input().split()))
res = 0
while res < t-1:
res += a[res]
if res == t-1:
print('YES')
else:
print('NO')
``` | 3 | |
764 | A | Taymyr is calling you | PROGRAMMING | 800 | [
"brute force",
"implementation",
"math"
] | null | null | Comrade Dujikov is busy choosing artists for Timofey's birthday and is recieving calls from Taymyr from Ilia-alpinist.
Ilia-alpinist calls every *n* minutes, i.e. in minutes *n*, 2*n*, 3*n* and so on. Artists come to the comrade every *m* minutes, i.e. in minutes *m*, 2*m*, 3*m* and so on. The day is *z* minutes long,... | The only string contains three integers — *n*, *m* and *z* (1<=≤<=*n*,<=*m*,<=*z*<=≤<=104). | Print single integer — the minimum number of artists that should be killed so that there are no artists in the room when Ilia calls. | [
"1 1 10\n",
"1 2 5\n",
"2 3 9\n"
] | [
"10\n",
"2\n",
"1\n"
] | Taymyr is a place in the north of Russia.
In the first test the artists come each minute, as well as the calls, so we need to kill all of them.
In the second test we need to kill artists which come on the second and the fourth minutes.
In the third test — only the artist which comes on the sixth minute. | 500 | [
{
"input": "1 1 10",
"output": "10"
},
{
"input": "1 2 5",
"output": "2"
},
{
"input": "2 3 9",
"output": "1"
},
{
"input": "4 8 9",
"output": "1"
},
{
"input": "7 9 2",
"output": "0"
},
{
"input": "10000 10000 10000",
"output": "1"
},
{
"i... | 1,694,278,690 | 2,147,483,647 | Python 3 | OK | TESTS | 32 | 46 | 0 | from math import gcd
n, m, z = map(int,input().split())
counter = 0
for i in range(n*m//(gcd(n,m)), z+1, n*m//(gcd(n,m))):
counter += 1
print(counter) | Title: Taymyr is calling you
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Comrade Dujikov is busy choosing artists for Timofey's birthday and is recieving calls from Taymyr from Ilia-alpinist.
Ilia-alpinist calls every *n* minutes, i.e. in minutes *n*, 2*n*, 3*n* and so on. Artists com... | ```python
from math import gcd
n, m, z = map(int,input().split())
counter = 0
for i in range(n*m//(gcd(n,m)), z+1, n*m//(gcd(n,m))):
counter += 1
print(counter)
``` | 3 | |
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",
... | 1,597,998,781 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 2 | 184 | 6,758,400 | n = int(input())
status = [-1]*n
for i in range(n):
a,b = map(int,input().split(' '))
if a != b and status[b-1] == -1:
status[b-1] = 0
count =0
for i in range(n):
if status[i] == -1:
count += 1
print (count) | 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())
status = [-1]*n
for i in range(n):
a,b = map(int,input().split(' '))
if a != b and status[b-1] == -1:
status[b-1] = 0
count =0
for i in range(n):
if status[i] == -1:
count += 1
print (count)
``` | -1 | |
405 | A | Gravity Flip | PROGRAMMING | 900 | [
"greedy",
"implementation",
"sortings"
] | null | null | Little Chris is bored during his physics lessons (too easy), so he has built a toy box to keep himself occupied. The box is special, since it has the ability to change gravity.
There are *n* columns of toy cubes in the box arranged in a line. The *i*-th column contains *a**i* cubes. At first, the gravity in the box is... | The first line of input contains an integer *n* (1<=≤<=*n*<=≤<=100), the number of the columns in the box. The next line contains *n* space-separated integer numbers. The *i*-th number *a**i* (1<=≤<=*a**i*<=≤<=100) denotes the number of cubes in the *i*-th column. | Output *n* integer numbers separated by spaces, where the *i*-th number is the amount of cubes in the *i*-th column after the gravity switch. | [
"4\n3 2 1 2\n",
"3\n2 3 8\n"
] | [
"1 2 2 3 \n",
"2 3 8 \n"
] | The first example case is shown on the figure. The top cube of the first column falls to the top of the last column; the top cube of the second column falls to the top of the third column; the middle cube of the first column falls to the top of the second column.
In the second example case the gravity switch does not ... | 500 | [
{
"input": "4\n3 2 1 2",
"output": "1 2 2 3 "
},
{
"input": "3\n2 3 8",
"output": "2 3 8 "
},
{
"input": "5\n2 1 2 1 2",
"output": "1 1 2 2 2 "
},
{
"input": "1\n1",
"output": "1 "
},
{
"input": "2\n4 3",
"output": "3 4 "
},
{
"input": "6\n100 40 60 20... | 1,686,429,515 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 31 | 0 | n= int(input())
a=[int(input()) for x in range(n)]
for i in range(len(a)):
for j in range(len(a)):
if a[i]<a[j]:
a[i],a[j]=a[j],a[i]
print(a) | Title: Gravity Flip
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little Chris is bored during his physics lessons (too easy), so he has built a toy box to keep himself occupied. The box is special, since it has the ability to change gravity.
There are *n* columns of toy cubes in the bo... | ```python
n= int(input())
a=[int(input()) for x in range(n)]
for i in range(len(a)):
for j in range(len(a)):
if a[i]<a[j]:
a[i],a[j]=a[j],a[i]
print(a)
``` | -1 | |
0 | none | none | none | 0 | [
"none"
] | null | null | Manao is taking part in a quiz. The quiz consists of *n* consecutive questions. A correct answer gives one point to the player. The game also has a counter of consecutive correct answers. When the player answers a question correctly, the number on this counter increases by 1. If the player answers a question incorrectl... | The single line contains three space-separated integers *n*, *m* and *k* (2<=≤<=*k*<=≤<=*n*<=≤<=109; 0<=≤<=*m*<=≤<=*n*). | Print a single integer — the remainder from division of Manao's minimum possible score in the quiz by 1000000009 (109<=+<=9). | [
"5 3 2\n",
"5 4 2\n"
] | [
"3\n",
"6\n"
] | Sample 1. Manao answered 3 questions out of 5, and his score would double for each two consecutive correct answers. If Manao had answered the first, third and fifth questions, he would have scored as much as 3 points.
Sample 2. Now Manao answered 4 questions. The minimum possible score is obtained when the only wrong ... | 0 | [
{
"input": "5 3 2",
"output": "3"
},
{
"input": "5 4 2",
"output": "6"
},
{
"input": "300 300 3",
"output": "17717644"
},
{
"input": "300 282 7",
"output": "234881124"
},
{
"input": "1000000000 1000000000 1000000000",
"output": "999999991"
},
{
"input"... | 1,534,999,673 | 2,147,483,647 | Python 3 | OK | TESTS | 73 | 218 | 0 | n,m,k=map(int,input().split())
MOD=1000000009
x=m-(n//k*(k-1)+(n%k))
if (x<=0):exit(print(m%MOD))
print(((m-x)+((pow(2,x+1, MOD)+2*MOD)-2)*k-x*(k-1))%MOD) | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Manao is taking part in a quiz. The quiz consists of *n* consecutive questions. A correct answer gives one point to the player. The game also has a counter of consecutive correct answers. When the player answers a question correct... | ```python
n,m,k=map(int,input().split())
MOD=1000000009
x=m-(n//k*(k-1)+(n%k))
if (x<=0):exit(print(m%MOD))
print(((m-x)+((pow(2,x+1, MOD)+2*MOD)-2)*k-x*(k-1))%MOD)
``` | 3 | |
47 | A | Triangular numbers | PROGRAMMING | 800 | [
"brute force",
"math"
] | A. Triangular numbers | 2 | 256 | A triangular number is the number of dots in an equilateral triangle uniformly filled with dots. For example, three dots can be arranged in a triangle; thus three is a triangular number. The *n*-th triangular number is the number of dots in a triangle with *n* dots on a side. . You can learn more about these numbers fr... | The first line contains the single number *n* (1<=≤<=*n*<=≤<=500) — the given integer. | If the given integer is a triangular number output YES, otherwise output NO. | [
"1\n",
"2\n",
"3\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | none | 500 | [
{
"input": "1",
"output": "YES"
},
{
"input": "2",
"output": "NO"
},
{
"input": "3",
"output": "YES"
},
{
"input": "4",
"output": "NO"
},
{
"input": "5",
"output": "NO"
},
{
"input": "6",
"output": "YES"
},
{
"input": "7",
"output": "NO... | 1,697,592,857 | 2,147,483,647 | PyPy 3-64 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | n=int(input())
k=0
b=False
for i in range(1,n):
if(i*(i+1)//2==n):
b=True
break
k+=1
if(b):
print("YES")
else:
print("NO) | Title: Triangular numbers
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
A triangular number is the number of dots in an equilateral triangle uniformly filled with dots. For example, three dots can be arranged in a triangle; thus three is a triangular number. The *n*-th triangular number is t... | ```python
n=int(input())
k=0
b=False
for i in range(1,n):
if(i*(i+1)//2==n):
b=True
break
k+=1
if(b):
print("YES")
else:
print("NO)
``` | -1 |
743 | B | Chloe and the sequence | PROGRAMMING | 1,200 | [
"binary search",
"bitmasks",
"constructive algorithms",
"implementation"
] | null | null | Chloe, the same as Vladik, is a competitive programmer. She didn't have any problems to get to the olympiad like Vladik, but she was confused by the task proposed on the olympiad.
Let's consider the following algorithm of generating a sequence of integers. Initially we have a sequence consisting of a single element eq... | The only line contains two integers *n* and *k* (1<=≤<=*n*<=≤<=50, 1<=≤<=*k*<=≤<=2*n*<=-<=1). | Print single integer — the integer at the *k*-th position in the obtained sequence. | [
"3 2\n",
"4 8\n"
] | [
"2",
"4"
] | In the first sample the obtained sequence is [1, 2, 1, 3, 1, 2, 1]. The number on the second position is 2.
In the second sample the obtained sequence is [1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1]. The number on the eighth position is 4. | 1,000 | [
{
"input": "3 2",
"output": "2"
},
{
"input": "4 8",
"output": "4"
},
{
"input": "5 27",
"output": "1"
},
{
"input": "7 44",
"output": "3"
},
{
"input": "15 18432",
"output": "12"
},
{
"input": "20 259676",
"output": "3"
},
{
"input": "30 6... | 1,603,431,776 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 0 | 218 | 2,048,000 |
def solve() :
n,m = map(int,input().split())
a = list(map(int,input().split()))
p = list(map(int,input().split()))
check = [0]*101
for i in p :
check[i] = 1
tot = n
while(tot) :
for i in range(n-1... | Title: Chloe and the sequence
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Chloe, the same as Vladik, is a competitive programmer. She didn't have any problems to get to the olympiad like Vladik, but she was confused by the task proposed on the olympiad.
Let's consider the following a... | ```python
def solve() :
n,m = map(int,input().split())
a = list(map(int,input().split()))
p = list(map(int,input().split()))
check = [0]*101
for i in p :
check[i] = 1
tot = n
while(tot) :
for i in... | -1 | |
499 | A | Watching a movie | PROGRAMMING | 1,000 | [
"greedy",
"implementation"
] | null | null | You have decided to watch the best moments of some movie. There are two buttons on your player:
1. Watch the current minute of the movie. By pressing this button, you watch the current minute of the movie and the player automatically proceeds to the next minute of the movie. 1. Skip exactly *x* minutes of the movie... | The first line contains two space-separated integers *n*, *x* (1<=≤<=*n*<=≤<=50, 1<=≤<=*x*<=≤<=105) — the number of the best moments of the movie and the value of *x* for the second button.
The following *n* lines contain the descriptions of the best moments of the movie, the *i*-th line of the description contains tw... | Output a single number — the answer to the problem. | [
"2 3\n5 6\n10 12\n",
"1 1\n1 100000\n"
] | [
"6\n",
"100000\n"
] | In the first sample, the player was initially standing on the first minute. As the minutes from the 1-st to the 4-th one don't contain interesting moments, we press the second button. Now we can not press the second button and skip 3 more minutes, because some of them contain interesting moments. Therefore, we watch th... | 500 | [
{
"input": "2 3\n5 6\n10 12",
"output": "6"
},
{
"input": "1 1\n1 100000",
"output": "100000"
},
{
"input": "10 1\n2156 3497\n4784 7775\n14575 31932\n33447 35902\n36426 47202\n48772 60522\n63982 68417\n78537 79445\n90081 90629\n94325 95728",
"output": "53974"
},
{
"input": "1... | 1,626,454,680 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 1 | 109 | 20,172,800 | n, x = map(int,input().split())
c=0
for i in range(n):
l, r = map(int,input().split())
if(r-l<=x):
c+=x
else:
c+=l-r+1
print(c) | Title: Watching a movie
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You have decided to watch the best moments of some movie. There are two buttons on your player:
1. Watch the current minute of the movie. By pressing this button, you watch the current minute of the movie and the pl... | ```python
n, x = map(int,input().split())
c=0
for i in range(n):
l, r = map(int,input().split())
if(r-l<=x):
c+=x
else:
c+=l-r+1
print(c)
``` | 0 | |
424 | C | Magic Formulas | PROGRAMMING | 1,600 | [
"math"
] | null | null | People in the Tomskaya region like magic formulas very much. You can see some of them below.
Imagine you are given a sequence of positive integer numbers *p*1, *p*2, ..., *p**n*. Lets write down some magic formulas:
Here, "mod" means the operation of taking the residue after dividing.
The expression means applying ... | The first line of the input contains the only integer *n* (1<=≤<=*n*<=≤<=106). The next line contains *n* integers: *p*1,<=*p*2,<=...,<=*p**n* (0<=≤<=*p**i*<=≤<=2·109). | The only line of output should contain a single integer — the value of *Q*. | [
"3\n1 2 3\n"
] | [
"3\n"
] | none | 1,500 | [
{
"input": "3\n1 2 3",
"output": "3"
},
{
"input": "1\n0",
"output": "0"
},
{
"input": "2\n65535 0",
"output": "65534"
},
{
"input": "10\n1356106972 165139648 978829595 410669403 873711167 287346624 117863440 228957745 835903650 1575323015",
"output": "948506286"
},
{... | 1,633,579,707 | 2,147,483,647 | PyPy 3 | OK | TESTS | 50 | 1,107 | 97,894,400 | n,a=int(input()),list(map(int,input().split()))
x=[0]*(n+1)
s=0
for i in range(1,n+1):
x[i]=i^x[i-1]
if (n//i)%2:
s^=x[i-1]
s^=x[n%i]
s^=a[i-1]
print(s) | Title: Magic Formulas
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
People in the Tomskaya region like magic formulas very much. You can see some of them below.
Imagine you are given a sequence of positive integer numbers *p*1, *p*2, ..., *p**n*. Lets write down some magic formulas:
He... | ```python
n,a=int(input()),list(map(int,input().split()))
x=[0]*(n+1)
s=0
for i in range(1,n+1):
x[i]=i^x[i-1]
if (n//i)%2:
s^=x[i-1]
s^=x[n%i]
s^=a[i-1]
print(s)
``` | 3 | |
417 | C | Football | PROGRAMMING | 1,400 | [
"constructive algorithms",
"graphs",
"implementation"
] | null | null | One day, at the "Russian Code Cup" event it was decided to play football as an out of competition event. All participants was divided into *n* teams and played several matches, two teams could not play against each other more than once.
The appointed Judge was the most experienced member — Pavel. But since he was the ... | The first line contains two integers — *n* and *k* (1<=≤<=*n*,<=*k*<=≤<=1000). | In the first line print an integer *m* — number of the played games. The following *m* lines should contain the information about all the matches, one match per line. The *i*-th line should contain two integers *a**i* and *b**i* (1<=≤<=*a**i*,<=*b**i*<=≤<=*n*; *a**i*<=≠<=*b**i*). The numbers *a**i* and *b**i* mean, tha... | [
"3 1\n"
] | [
"3\n1 2\n2 3\n3 1\n"
] | none | 1,500 | [
{
"input": "3 1",
"output": "3\n1 2\n2 3\n3 1"
},
{
"input": "7 3",
"output": "21\n1 2\n1 3\n1 4\n2 3\n2 4\n2 5\n3 4\n3 5\n3 6\n4 5\n4 6\n4 7\n5 6\n5 7\n5 1\n6 7\n6 1\n6 2\n7 1\n7 2\n7 3"
},
{
"input": "4 1",
"output": "4\n1 2\n2 3\n3 4\n4 1"
},
{
"input": "5 2",
"output"... | 1,605,777,411 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 5 | 93 | 307,200 | n, k = list(map(int, input().split()))
matrix = [[0] * n for i in range(n)]
if k > n - 1:
print(-1)
exit()
print(k * n)
for i in range(n):
cnt = k - matrix[i].count(1)
for j in range(n):
if cnt == 0:
break
if i == j:
continue
if matrix[i... | Title: Football
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day, at the "Russian Code Cup" event it was decided to play football as an out of competition event. All participants was divided into *n* teams and played several matches, two teams could not play against each other more ... | ```python
n, k = list(map(int, input().split()))
matrix = [[0] * n for i in range(n)]
if k > n - 1:
print(-1)
exit()
print(k * n)
for i in range(n):
cnt = k - matrix[i].count(1)
for j in range(n):
if cnt == 0:
break
if i == j:
continue
i... | 0 | |
71 | A | Way Too Long Words | PROGRAMMING | 800 | [
"strings"
] | A. Way Too Long Words | 1 | 256 | Sometimes some words like "localization" or "internationalization" are so long that writing them many times in one text is quite tiresome.
Let's consider a word too long, if its length is strictly more than 10 characters. All too long words should be replaced with a special abbreviation.
This abbreviation is made lik... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=100). Each of the following *n* lines contains one word. All the words consist of lowercase Latin letters and possess the lengths of from 1 to 100 characters. | Print *n* lines. The *i*-th line should contain the result of replacing of the *i*-th word from the input data. | [
"4\nword\nlocalization\ninternationalization\npneumonoultramicroscopicsilicovolcanoconiosis\n"
] | [
"word\nl10n\ni18n\np43s\n"
] | none | 500 | [
{
"input": "4\nword\nlocalization\ninternationalization\npneumonoultramicroscopicsilicovolcanoconiosis",
"output": "word\nl10n\ni18n\np43s"
},
{
"input": "5\nabcdefgh\nabcdefghi\nabcdefghij\nabcdefghijk\nabcdefghijklm",
"output": "abcdefgh\nabcdefghi\nabcdefghij\na9k\na11m"
},
{
"input":... | 1,689,104,005 | 2,147,483,647 | Python 3 | OK | TESTS | 20 | 31 | 0 | number_of_words = int(input())
for i in range(number_of_words):
data = input()
if len(data) > 10:
print(f"{data[0]}{len(data)-2}{data[-1]}")
else:
print(data)
| Title: Way Too Long Words
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Sometimes some words like "localization" or "internationalization" are so long that writing them many times in one text is quite tiresome.
Let's consider a word too long, if its length is strictly more than 10 character... | ```python
number_of_words = int(input())
for i in range(number_of_words):
data = input()
if len(data) > 10:
print(f"{data[0]}{len(data)-2}{data[-1]}")
else:
print(data)
``` | 3.9845 |
887 | A | Div. 64 | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | Top-model Izabella participates in the competition. She wants to impress judges and show her mathematical skills.
Her problem is following: for given string, consisting of only 0 and 1, tell if it's possible to remove some digits in such a way, that remaining number is a representation of some positive integer, divisi... | In the only line given a non-empty binary string *s* with length up to 100. | Print «yes» (without quotes) if it's possible to remove digits required way and «no» otherwise. | [
"100010001\n",
"100\n"
] | [
"yes",
"no"
] | In the first test case, you can get string 1 000 000 after removing two ones which is a representation of number 64 in the binary numerical system.
You can read more about binary numeral system representation here: [https://en.wikipedia.org/wiki/Binary_system](https://en.wikipedia.org/wiki/Binary_system) | 500 | [
{
"input": "100010001",
"output": "yes"
},
{
"input": "100",
"output": "no"
},
{
"input": "0000001000000",
"output": "yes"
},
{
"input": "1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111",
"output": "no"
},
{
"in... | 1,512,760,479 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 10 | 93 | 23,040,000 | s = input()
cnt = 0
for i in range(0, len(s)):
tmp = s[i]
if int(tmp) == 1:
flag = i
break
for i in range(flag, len(s)):
tmp = s[i]
if int(tmp) == 0:
cnt += 1
if cnt >= 6:
print('yes')
else:
print('no') | Title: Div. 64
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Top-model Izabella participates in the competition. She wants to impress judges and show her mathematical skills.
Her problem is following: for given string, consisting of only 0 and 1, tell if it's possible to remove some dig... | ```python
s = input()
cnt = 0
for i in range(0, len(s)):
tmp = s[i]
if int(tmp) == 1:
flag = i
break
for i in range(flag, len(s)):
tmp = s[i]
if int(tmp) == 0:
cnt += 1
if cnt >= 6:
print('yes')
else:
print('no')
``` | -1 | |
879 | B | Table Tennis | PROGRAMMING | 1,200 | [
"data structures",
"implementation"
] | null | null | *n* people are standing in a line to play table tennis. At first, the first two players in the line play a game. Then the loser goes to the end of the line, and the winner plays with the next person from the line, and so on. They play until someone wins *k* games in a row. This player becomes the winner.
For each of t... | The first line contains two integers: *n* and *k* (2<=≤<=*n*<=≤<=500, 2<=≤<=*k*<=≤<=1012) — the number of people and the number of wins.
The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=*n*) — powers of the player. It's guaranteed that this line contains a valid permutation, i.e. all ... | Output a single integer — power of the winner. | [
"2 2\n1 2\n",
"4 2\n3 1 2 4\n",
"6 2\n6 5 3 1 2 4\n",
"2 10000000000\n2 1\n"
] | [
"2 ",
"3 ",
"6 ",
"2\n"
] | Games in the second sample:
3 plays with 1. 3 wins. 1 goes to the end of the line.
3 plays with 2. 3 wins. He wins twice in a row. He becomes the winner. | 1,000 | [
{
"input": "2 2\n1 2",
"output": "2 "
},
{
"input": "4 2\n3 1 2 4",
"output": "3 "
},
{
"input": "6 2\n6 5 3 1 2 4",
"output": "6 "
},
{
"input": "2 10000000000\n2 1",
"output": "2"
},
{
"input": "4 4\n1 3 4 2",
"output": "4 "
},
{
"input": "2 21474836... | 1,684,182,297 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 8 | 46 | 0 | n, k = map(int, input().split())
powers = list(map(int, input().split()))
# Returns True if the player with power p wins at least k consecutive games
def wins_k_consecutive_games(p):
consecutive_wins = 0
for i in range(n):
if powers[i] <= p:
consecutive_wins += 1
else:
... | Title: Table Tennis
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
*n* people are standing in a line to play table tennis. At first, the first two players in the line play a game. Then the loser goes to the end of the line, and the winner plays with the next person from the line, and so o... | ```python
n, k = map(int, input().split())
powers = list(map(int, input().split()))
# Returns True if the player with power p wins at least k consecutive games
def wins_k_consecutive_games(p):
consecutive_wins = 0
for i in range(n):
if powers[i] <= p:
consecutive_wins += 1
... | 0 | |
385 | B | Bear and Strings | PROGRAMMING | 1,200 | [
"brute force",
"greedy",
"implementation",
"math",
"strings"
] | null | null | The bear has a string *s*<==<=*s*1*s*2... *s*|*s*| (record |*s*| is the string's length), consisting of lowercase English letters. The bear wants to count the number of such pairs of indices *i*,<=*j* (1<=≤<=*i*<=≤<=*j*<=≤<=|*s*|), that string *x*(*i*,<=*j*)<==<=*s**i**s**i*<=+<=1... *s**j* contains at least one string... | The first line contains a non-empty string *s* (1<=≤<=|*s*|<=≤<=5000). It is guaranteed that the string only consists of lowercase English letters. | Print a single number — the answer to the problem. | [
"bearbtear\n",
"bearaabearc\n"
] | [
"6\n",
"20\n"
] | In the first sample, the following pairs (*i*, *j*) match: (1, 4), (1, 5), (1, 6), (1, 7), (1, 8), (1, 9).
In the second sample, the following pairs (*i*, *j*) match: (1, 4), (1, 5), (1, 6), (1, 7), (1, 8), (1, 9), (1, 10), (1, 11), (2, 10), (2, 11), (3, 10), (3, 11), (4, 10), (4, 11), (5, 10), (5, 11)... | 1,000 | [
{
"input": "bearbtear",
"output": "6"
},
{
"input": "bearaabearc",
"output": "20"
},
{
"input": "pbearbearhbearzqbearjkterasjhy",
"output": "291"
},
{
"input": "pbearjbearbebearnbabcffbearbearwubearjezpiorrbearbearjbdlbearbearqbearjbearwipmsbearoaftrsebearzsnqb",
"output"... | 1,390,580,336 | 2,636 | Python 3 | TIME_LIMIT_EXCEEDED | PRETESTS | 7 | 1,000 | 409,600 |
s = input()
k = 0
for i in range(len(s)):
for j in range(i + 1, len(s) + 1):
if "bear" in s[i:j]:
k += 1
print(k) | Title: Bear and Strings
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The bear has a string *s*<==<=*s*1*s*2... *s*|*s*| (record |*s*| is the string's length), consisting of lowercase English letters. The bear wants to count the number of such pairs of indices *i*,<=*j* (1<=≤<=*i*<=≤<=*j... | ```python
s = input()
k = 0
for i in range(len(s)):
for j in range(i + 1, len(s) + 1):
if "bear" in s[i:j]:
k += 1
print(k)
``` | 0 | |
109 | A | Lucky Sum of Digits | PROGRAMMING | 1,000 | [
"brute force",
"implementation"
] | A. Lucky Sum of Digits | 2 | 256 | Petya loves lucky numbers. We all know that lucky numbers are the positive integers whose decimal representations contain only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.
Petya wonders eagerly what minimum lucky number has the sum of digits equal to *n*. Help him cope wi... | The single line contains an integer *n* (1<=≤<=*n*<=≤<=106) — the sum of digits of the required lucky number. | Print on the single line the result — the minimum lucky number, whose sum of digits equals *n*. If such number does not exist, print -1. | [
"11\n",
"10\n"
] | [
"47\n",
"-1\n"
] | none | 500 | [
{
"input": "11",
"output": "47"
},
{
"input": "10",
"output": "-1"
},
{
"input": "64",
"output": "4477777777"
},
{
"input": "1",
"output": "-1"
},
{
"input": "4",
"output": "4"
},
{
"input": "7",
"output": "7"
},
{
"input": "12",
"outpu... | 1,655,887,451 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 1 | 2,000 | 102,400 | n = int(input())
flag = 0
for i in range(4,10**(100000)):
k = str(i)
s = [int(j) for j in k]
if len(set(s) - {4,7}) == 0:
if sum(s) == n:
print(i)
flag = 1
break
if flag == 0:
print(-1) | Title: Lucky Sum of Digits
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Petya loves lucky numbers. We all know that lucky numbers are the positive integers whose decimal representations contain only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.
... | ```python
n = int(input())
flag = 0
for i in range(4,10**(100000)):
k = str(i)
s = [int(j) for j in k]
if len(set(s) - {4,7}) == 0:
if sum(s) == n:
print(i)
flag = 1
break
if flag == 0:
print(-1)
``` | 0 |
330 | A | Cakeminator | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | You are given a rectangular cake, represented as an *r*<=×<=*c* grid. Each cell either has an evil strawberry, or is empty. For example, a 3<=×<=4 cake may look as follows:
The cakeminator is going to eat the cake! Each time he eats, he chooses a row or a column that does not contain any evil strawberries and contains... | The first line contains two integers *r* and *c* (2<=≤<=*r*,<=*c*<=≤<=10), denoting the number of rows and the number of columns of the cake. The next *r* lines each contains *c* characters — the *j*-th character of the *i*-th line denotes the content of the cell at row *i* and column *j*, and is either one of these:
... | Output the maximum number of cake cells that the cakeminator can eat. | [
"3 4\nS...\n....\n..S.\n"
] | [
"8\n"
] | For the first example, one possible way to eat the maximum number of cake cells is as follows (perform 3 eats). | 500 | [
{
"input": "3 4\nS...\n....\n..S.",
"output": "8"
},
{
"input": "2 2\n..\n..",
"output": "4"
},
{
"input": "2 2\nSS\nSS",
"output": "0"
},
{
"input": "7 3\nS..\nS..\nS..\nS..\nS..\nS..\nS..",
"output": "14"
},
{
"input": "3 5\n..S..\nSSSSS\n..S..",
"output": "... | 1,604,644,273 | 2,147,483,647 | Python 3 | OK | TESTS | 42 | 218 | 307,200 | #TASKS
#1) take all input and store map as a 2D array for example:
# S . . .
# . . . .
# . . S .
#2) Check rows for S's, for each row with an S, +1 to counter
#3) Check columns for S's, for each column with an S, +1 to counter
#4) Answer is (rows without S) * c + (columns without S) * r - (rows without s*c... | Title: Cakeminator
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given a rectangular cake, represented as an *r*<=×<=*c* grid. Each cell either has an evil strawberry, or is empty. For example, a 3<=×<=4 cake may look as follows:
The cakeminator is going to eat the cake! Each ti... | ```python
#TASKS
#1) take all input and store map as a 2D array for example:
# S . . .
# . . . .
# . . S .
#2) Check rows for S's, for each row with an S, +1 to counter
#3) Check columns for S's, for each column with an S, +1 to counter
#4) Answer is (rows without S) * c + (columns without S) * r - (rows w... | 3 | |
346 | A | Alice and Bob | PROGRAMMING | 1,600 | [
"games",
"math",
"number theory"
] | null | null | It is so boring in the summer holiday, isn't it? So Alice and Bob have invented a new game to play. The rules are as follows. First, they get a set of *n* distinct integers. And then they take turns to make the following moves. During each move, either Alice or Bob (the player whose turn is the current) can choose two ... | The first line contains an integer *n* (2<=≤<=*n*<=≤<=100) — the initial number of elements in the set. The second line contains *n* distinct space-separated integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=109) — the elements of the set. | Print a single line with the winner's name. If Alice wins print "Alice", otherwise print "Bob" (without quotes). | [
"2\n2 3\n",
"2\n5 3\n",
"3\n5 6 7\n"
] | [
"Alice\n",
"Alice\n",
"Bob\n"
] | Consider the first test sample. Alice moves first, and the only move she can do is to choose 2 and 3, then to add 1 to the set. Next Bob moves, there is no valid move anymore, so the winner is Alice. | 500 | [
{
"input": "2\n2 3",
"output": "Alice"
},
{
"input": "2\n5 3",
"output": "Alice"
},
{
"input": "3\n5 6 7",
"output": "Bob"
},
{
"input": "10\n72 96 24 66 6 18 12 30 60 48",
"output": "Bob"
},
{
"input": "10\n78 66 6 60 18 84 36 96 72 48",
"output": "Bob"
},
... | 1,652,105,858 | 2,147,483,647 | Python 3 | OK | TESTS | 39 | 92 | 0 | n = int(input())
ciag = [int(x) for x in input().split()]
naj = 0
for i in range(n):
if naj<ciag[i]:
naj = ciag[i]
def nwd(a,b):
while b!=0:
a,b = b, a%b
return a
wsz = nwd(ciag[1],ciag[0])
for i in range(1,n):
wsz = nwd(wsz,ciag[i])
wy = (naj//wsz-n)%2
if wy == 1:
print('Alice')
else:
... | Title: Alice and Bob
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
It is so boring in the summer holiday, isn't it? So Alice and Bob have invented a new game to play. The rules are as follows. First, they get a set of *n* distinct integers. And then they take turns to make the following ... | ```python
n = int(input())
ciag = [int(x) for x in input().split()]
naj = 0
for i in range(n):
if naj<ciag[i]:
naj = ciag[i]
def nwd(a,b):
while b!=0:
a,b = b, a%b
return a
wsz = nwd(ciag[1],ciag[0])
for i in range(1,n):
wsz = nwd(wsz,ciag[i])
wy = (naj//wsz-n)%2
if wy == 1:
print('Alice... | 3 | |
937 | B | Vile Grasshoppers | PROGRAMMING | 1,400 | [
"brute force",
"math",
"number theory"
] | null | null | The weather is fine today and hence it's high time to climb the nearby pine and enjoy the landscape.
The pine's trunk includes several branches, located one above another and numbered from 2 to *y*. Some of them (more precise, from 2 to *p*) are occupied by tiny vile grasshoppers which you're at war with. These grassh... | The only line contains two integers *p* and *y* (2<=≤<=*p*<=≤<=*y*<=≤<=109). | Output the number of the highest suitable branch. If there are none, print -1 instead. | [
"3 6\n",
"3 4\n"
] | [
"5\n",
"-1\n"
] | In the first sample case grasshopper from branch 2 reaches branches 2, 4 and 6 while branch 3 is initially settled by another grasshopper. Therefore the answer is 5.
It immediately follows that there are no valid branches in second sample case. | 1,000 | [
{
"input": "3 6",
"output": "5"
},
{
"input": "3 4",
"output": "-1"
},
{
"input": "2 2",
"output": "-1"
},
{
"input": "5 50",
"output": "49"
},
{
"input": "944192806 944193066",
"output": "944192807"
},
{
"input": "1000000000 1000000000",
"output":... | 1,593,597,710 | 2,930 | PyPy 3 | WRONG_ANSWER | TESTS | 4 | 327 | 1,331,200 | import math
def fact(n):
while n % 2 == 0:
s.add(2)
n = n / 2
for i in range(3,int(math.sqrt(n))+1,2):
while n % i== 0:
s.add(i)
n = n / i
if n > 2:
s.add(n)
input=__import__('sys').stdin.readline
p,y = map(int,input().split())
s=se... | Title: Vile Grasshoppers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The weather is fine today and hence it's high time to climb the nearby pine and enjoy the landscape.
The pine's trunk includes several branches, located one above another and numbered from 2 to *y*. Some of them (mor... | ```python
import math
def fact(n):
while n % 2 == 0:
s.add(2)
n = n / 2
for i in range(3,int(math.sqrt(n))+1,2):
while n % i== 0:
s.add(i)
n = n / i
if n > 2:
s.add(n)
input=__import__('sys').stdin.readline
p,y = map(int,input().spli... | 0 | |
45 | A | Codecraft III | PROGRAMMING | 900 | [
"implementation"
] | A. Codecraft III | 2 | 256 | Today Vasya visited a widely known site and learned that the continuation of his favourite game Codecraft II will appear after exactly *k* months. He looked at the calendar and learned that at the moment is the month number *s*. Vasya immediately got interested in what month Codecraft III will appear. Help him understa... | The first input line contains the name of the current month. It is guaranteed that it is a proper English name of one of twelve months. The first letter is uppercase, the rest are lowercase. The second line contains integer *k* (0<=≤<=*k*<=≤<=100) — the number of months left till the appearance of Codecraft III. | Print starting from an uppercase letter the name of the month in which the continuation of Codeforces II will appear. The printed name must be contained in the list January, February, March, April, May, June, July, August, September, October, November, December. | [
"November\n3\n",
"May\n24\n"
] | [
"February\n",
"May\n"
] | none | 0 | [
{
"input": "November\n3",
"output": "February"
},
{
"input": "May\n24",
"output": "May"
},
{
"input": "April\n0",
"output": "April"
},
{
"input": "September\n0",
"output": "September"
},
{
"input": "August\n0",
"output": "August"
},
{
"input": "June\n1... | 1,683,436,993 | 2,147,483,647 | Python 3 | OK | TESTS | 25 | 62 | 0 | month=input()
k=int(input())
month_list=['January','February','March','April','May','June','July','August','September','October','November','December']
for i in range(12):
if month_list[i]==month:
index=i
break
list_index=index+k+1
if list_index>12:
list_index%=12
print(month_list[list... | Title: Codecraft III
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Today Vasya visited a widely known site and learned that the continuation of his favourite game Codecraft II will appear after exactly *k* months. He looked at the calendar and learned that at the moment is the month number *... | ```python
month=input()
k=int(input())
month_list=['January','February','March','April','May','June','July','August','September','October','November','December']
for i in range(12):
if month_list[i]==month:
index=i
break
list_index=index+k+1
if list_index>12:
list_index%=12
print(month... | 3.9845 |
4 | A | Watermelon | PROGRAMMING | 800 | [
"brute force",
"math"
] | A. Watermelon | 1 | 64 | One hot summer day Pete and his friend Billy decided to buy a watermelon. They chose the biggest and the ripest one, in their opinion. After that the watermelon was weighed, and the scales showed *w* kilos. They rushed home, dying of thirst, and decided to divide the berry, however they faced a hard problem.
Pete and ... | The first (and the only) input line contains integer number *w* (1<=≤<=*w*<=≤<=100) — the weight of the watermelon bought by the boys. | Print YES, if the boys can divide the watermelon into two parts, each of them weighing even number of kilos; and NO in the opposite case. | [
"8\n"
] | [
"YES\n"
] | For example, the boys can divide the watermelon into two parts of 2 and 6 kilos respectively (another variant — two parts of 4 and 4 kilos). | 0 | [
{
"input": "8",
"output": "YES"
},
{
"input": "5",
"output": "NO"
},
{
"input": "4",
"output": "YES"
},
{
"input": "3",
"output": "NO"
},
{
"input": "2",
"output": "NO"
},
{
"input": "1",
"output": "NO"
},
{
"input": "7",
"output": "NO"... | 1,687,153,863 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 7 | 92 | 0 | w = int(input())
if w % 2 != 0:
print('NO')
else:
h = w/2
if h%2 == 0:
print("YES")
else:
print("NO") | Title: Watermelon
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
One hot summer day Pete and his friend Billy decided to buy a watermelon. They chose the biggest and the ripest one, in their opinion. After that the watermelon was weighed, and the scales showed *w* kilos. They rushed home, dyin... | ```python
w = int(input())
if w % 2 != 0:
print('NO')
else:
h = w/2
if h%2 == 0:
print("YES")
else:
print("NO")
``` | 0 |
0 | none | none | none | 0 | [
"none"
] | null | null | Limak is an old brown bear. He often plays poker with his friends. Today they went to a casino. There are *n* players (including Limak himself) and right now all of them have bids on the table. *i*-th of them has bid with size *a**i* dollars.
Each player can double his bid any number of times and triple his bid any nu... | First line of input contains an integer *n* (2<=≤<=*n*<=≤<=105), the number of players.
The second line contains *n* integer numbers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=109) — the bids of players. | Print "Yes" (without the quotes) if players can make their bids become equal, or "No" otherwise. | [
"4\n75 150 75 50\n",
"3\n100 150 250\n"
] | [
"Yes\n",
"No\n"
] | In the first sample test first and third players should double their bids twice, second player should double his bid once and fourth player should both double and triple his bid.
It can be shown that in the second sample test there is no way to make all bids equal. | 0 | [
{
"input": "4\n75 150 75 50",
"output": "Yes"
},
{
"input": "3\n100 150 250",
"output": "No"
},
{
"input": "7\n34 34 68 34 34 68 34",
"output": "Yes"
},
{
"input": "10\n72 96 12 18 81 20 6 2 54 1",
"output": "No"
},
{
"input": "20\n958692492 954966768 77387000 724... | 1,440,867,759 | 1,959 | Python 3 | WRONG_ANSWER | PRETESTS | 1 | 124 | 5,836,800 | from fractions import gcd
a=int(input())
strinp=str(input()).split()
lis=[]
for h in range(a):
lis.append(int(strinp[h]))
res = gcd(*lis[:2]) #get the gcd of first two numbers
for x in lis[2:]: #now iterate over the list starting from the 3rd element
res = gcd(res,x)
p=lis[0]
for h in range(1,a):
... | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Limak is an old brown bear. He often plays poker with his friends. Today they went to a casino. There are *n* players (including Limak himself) and right now all of them have bids on the table. *i*-th of them has bid with size *a*... | ```python
from fractions import gcd
a=int(input())
strinp=str(input()).split()
lis=[]
for h in range(a):
lis.append(int(strinp[h]))
res = gcd(*lis[:2]) #get the gcd of first two numbers
for x in lis[2:]: #now iterate over the list starting from the 3rd element
res = gcd(res,x)
p=lis[0]
for h in range... | 0 | |
330 | A | Cakeminator | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | You are given a rectangular cake, represented as an *r*<=×<=*c* grid. Each cell either has an evil strawberry, or is empty. For example, a 3<=×<=4 cake may look as follows:
The cakeminator is going to eat the cake! Each time he eats, he chooses a row or a column that does not contain any evil strawberries and contains... | The first line contains two integers *r* and *c* (2<=≤<=*r*,<=*c*<=≤<=10), denoting the number of rows and the number of columns of the cake. The next *r* lines each contains *c* characters — the *j*-th character of the *i*-th line denotes the content of the cell at row *i* and column *j*, and is either one of these:
... | Output the maximum number of cake cells that the cakeminator can eat. | [
"3 4\nS...\n....\n..S.\n"
] | [
"8\n"
] | For the first example, one possible way to eat the maximum number of cake cells is as follows (perform 3 eats). | 500 | [
{
"input": "3 4\nS...\n....\n..S.",
"output": "8"
},
{
"input": "2 2\n..\n..",
"output": "4"
},
{
"input": "2 2\nSS\nSS",
"output": "0"
},
{
"input": "7 3\nS..\nS..\nS..\nS..\nS..\nS..\nS..",
"output": "14"
},
{
"input": "3 5\n..S..\nSSSSS\n..S..",
"output": "... | 1,611,399,962 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 62 | 0 | n, m = map(int, input().split())
a = [input() for _ in range(n)]
z = [i.count('.') for i in a]
x = [i.count('S') for i in a]
print(sum(z) * sum(x) - n * m) | Title: Cakeminator
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given a rectangular cake, represented as an *r*<=×<=*c* grid. Each cell either has an evil strawberry, or is empty. For example, a 3<=×<=4 cake may look as follows:
The cakeminator is going to eat the cake! Each ti... | ```python
n, m = map(int, input().split())
a = [input() for _ in range(n)]
z = [i.count('.') for i in a]
x = [i.count('S') for i in a]
print(sum(z) * sum(x) - n * m)
``` | 0 | |
225 | A | Dice Tower | PROGRAMMING | 1,100 | [
"constructive algorithms",
"greedy"
] | null | null | A dice is a cube, its faces contain distinct integers from 1 to 6 as black points. The sum of numbers at the opposite dice faces always equals 7. Please note that there are only two dice (these dices are mirror of each other) that satisfy the given constraints (both of them are shown on the picture on the left).
Alice... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=100) — the number of dice in the tower.
The second line contains an integer *x* (1<=≤<=*x*<=≤<=6) — the number Bob sees at the top of the tower. Next *n* lines contain two space-separated integers each: the *i*-th line contains numbers *a**i*,<=*b**i* (1<=≤<=... | Print "YES" (without the quotes), if it is possible to to uniquely identify the numbers on the faces of all the dice in the tower. If it is impossible, print "NO" (without the quotes). | [
"3\n6\n3 2\n5 4\n2 4\n",
"3\n3\n2 6\n4 1\n5 3\n"
] | [
"YES",
"NO"
] | none | 500 | [
{
"input": "3\n6\n3 2\n5 4\n2 4",
"output": "YES"
},
{
"input": "3\n3\n2 6\n4 1\n5 3",
"output": "NO"
},
{
"input": "1\n3\n2 1",
"output": "YES"
},
{
"input": "2\n2\n3 1\n1 5",
"output": "NO"
},
{
"input": "3\n2\n1 4\n5 3\n6 4",
"output": "NO"
},
{
"in... | 1,670,848,836 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 52 | 124 | 0 | def main():
n = int(input())
x = int(input())
y = 7-x
while n:
n -= 1
m,k = map(int, input().split())
if (m == x or m ==y) or (k == x or k ==y):
print("NO")
return
print("YES")
main() | Title: Dice Tower
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A dice is a cube, its faces contain distinct integers from 1 to 6 as black points. The sum of numbers at the opposite dice faces always equals 7. Please note that there are only two dice (these dices are mirror of each other... | ```python
def main():
n = int(input())
x = int(input())
y = 7-x
while n:
n -= 1
m,k = map(int, input().split())
if (m == x or m ==y) or (k == x or k ==y):
print("NO")
return
print("YES")
main()
``` | 3 | |
313 | B | Ilya and Queries | PROGRAMMING | 1,100 | [
"dp",
"implementation"
] | null | null | Ilya the Lion wants to help all his friends with passing exams. They need to solve the following problem to pass the IT exam.
You've got string *s*<==<=*s*1*s*2... *s**n* (*n* is the length of the string), consisting only of characters "." and "#" and *m* queries. Each query is described by a pair of integers *l**i*,<... | The first line contains string *s* of length *n* (2<=≤<=*n*<=≤<=105). It is guaranteed that the given string only consists of characters "." and "#".
The next line contains integer *m* (1<=≤<=*m*<=≤<=105) — the number of queries. Each of the next *m* lines contains the description of the corresponding query. The *i*-t... | Print *m* integers — the answers to the queries in the order in which they are given in the input. | [
"......\n4\n3 4\n2 3\n1 6\n2 6\n",
"#..###\n5\n1 3\n5 6\n1 5\n3 6\n3 4\n"
] | [
"1\n1\n5\n4\n",
"1\n1\n2\n2\n0\n"
] | none | 1,000 | [
{
"input": "......\n4\n3 4\n2 3\n1 6\n2 6",
"output": "1\n1\n5\n4"
},
{
"input": "#..###\n5\n1 3\n5 6\n1 5\n3 6\n3 4",
"output": "1\n1\n2\n2\n0"
},
{
"input": ".#...#..\n6\n1 5\n2 3\n6 7\n2 4\n2 5\n1 3",
"output": "2\n0\n0\n1\n2\n0"
},
{
"input": "#.#.#..\n5\n3 4\n4 5\n5 7\n5... | 1,699,891,461 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 62 | 0 | s = input()
a = [0, 0]
for i in range(len(s) - 1):
a += a[-1] + (s[i] == s[i + 1])
n = int(input())
for _ in range(n):
i, j = map(int, input().split())
print(a[j] - a[i]) | Title: Ilya and Queries
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Ilya the Lion wants to help all his friends with passing exams. They need to solve the following problem to pass the IT exam.
You've got string *s*<==<=*s*1*s*2... *s**n* (*n* is the length of the string), consisting ... | ```python
s = input()
a = [0, 0]
for i in range(len(s) - 1):
a += a[-1] + (s[i] == s[i + 1])
n = int(input())
for _ in range(n):
i, j = map(int, input().split())
print(a[j] - a[i])
``` | -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",
... | 1,695,272,047 | 2,147,483,647 | PyPy 3 | OK | TESTS | 34 | 216 | 0 | n=int(input())
l1=[]
l2=[]
l3=[]
l4=[]
c=0
for i in range (n):
x,y=map(int,input().split())
l1.append(x)
l2.append(y)
for i in range (len(l1)):
l3=l3+l2
l3.pop(i)
if l1[i] not in l3:
c=c+1
# l4.append(l1[i])
l3.clear()
print(c) | 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())
l1=[]
l2=[]
l3=[]
l4=[]
c=0
for i in range (n):
x,y=map(int,input().split())
l1.append(x)
l2.append(y)
for i in range (len(l1)):
l3=l3+l2
l3.pop(i)
if l1[i] not in l3:
c=c+1
# l4.append(l1[i])
l3.clear()
print(c)
``` | 3 | |
320 | A | Magic Numbers | PROGRAMMING | 900 | [
"brute force",
"greedy"
] | null | null | A magic number is a number formed by concatenation of numbers 1, 14 and 144. We can use each of these numbers any number of times. Therefore 14144, 141414 and 1411 are magic numbers but 1444, 514 and 414 are not.
You're given a number. Determine if it is a magic number or not. | The first line of input contains an integer *n*, (1<=≤<=*n*<=≤<=109). This number doesn't contain leading zeros. | Print "YES" if *n* is a magic number or print "NO" if it's not. | [
"114114\n",
"1111\n",
"441231\n"
] | [
"YES\n",
"YES\n",
"NO\n"
] | none | 500 | [
{
"input": "114114",
"output": "YES"
},
{
"input": "1111",
"output": "YES"
},
{
"input": "441231",
"output": "NO"
},
{
"input": "1",
"output": "YES"
},
{
"input": "14",
"output": "YES"
},
{
"input": "114",
"output": "YES"
},
{
"input": "9",... | 1,691,997,290 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 17 | 92 | 0 | x = input()
a1 = x.count('144')
a2 = x.count('14')
a3 = x.count('1')
for i in range(a1):
x = x.replace('144', '')
for i in range(a2):
x = x.replace('14', '')
for i in range(a3):
x = x.replace('1', '')
if len(x) == 0:
print("YES")
else:
print("NO")
| Title: Magic Numbers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A magic number is a number formed by concatenation of numbers 1, 14 and 144. We can use each of these numbers any number of times. Therefore 14144, 141414 and 1411 are magic numbers but 1444, 514 and 414 are not.
You're ... | ```python
x = input()
a1 = x.count('144')
a2 = x.count('14')
a3 = x.count('1')
for i in range(a1):
x = x.replace('144', '')
for i in range(a2):
x = x.replace('14', '')
for i in range(a3):
x = x.replace('1', '')
if len(x) == 0:
print("YES")
else:
print("NO")
``` | 0 | |
959 | A | Mahmoud and Ehab and the even-odd game | PROGRAMMING | 800 | [
"games",
"math"
] | null | null | Mahmoud and Ehab play a game called the even-odd game. Ehab chooses his favorite integer *n* and then they take turns, starting from Mahmoud. In each player's turn, he has to choose an integer *a* and subtract it from *n* such that:
- 1<=≤<=*a*<=≤<=*n*. - If it's Mahmoud's turn, *a* has to be even, but if it's Ehab'... | The only line contains an integer *n* (1<=≤<=*n*<=≤<=109), the number at the beginning of the game. | Output "Mahmoud" (without quotes) if Mahmoud wins and "Ehab" (without quotes) otherwise. | [
"1\n",
"2\n"
] | [
"Ehab",
"Mahmoud"
] | In the first sample, Mahmoud can't choose any integer *a* initially because there is no positive even integer less than or equal to 1 so Ehab wins.
In the second sample, Mahmoud has to choose *a* = 2 and subtract it from *n*. It's Ehab's turn and *n* = 0. There is no positive odd integer less than or equal to 0 so Mah... | 500 | [
{
"input": "1",
"output": "Ehab"
},
{
"input": "2",
"output": "Mahmoud"
},
{
"input": "10000",
"output": "Mahmoud"
},
{
"input": "33333",
"output": "Ehab"
},
{
"input": "5",
"output": "Ehab"
},
{
"input": "1000000000",
"output": "Mahmoud"
},
{
... | 1,605,964,747 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 93 | 0 | n=int(input())
n%=3
# minimum even-odd selection
print('Mahmoud' if n==2 else 'Ehab')
| Title: Mahmoud and Ehab and the even-odd game
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Mahmoud and Ehab play a game called the even-odd game. Ehab chooses his favorite integer *n* and then they take turns, starting from Mahmoud. In each player's turn, he has to choose an integer *a*... | ```python
n=int(input())
n%=3
# minimum even-odd selection
print('Mahmoud' if n==2 else 'Ehab')
``` | 0 | |
918 | A | Eleven | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | Eleven wants to choose a new name for herself. As a bunch of geeks, her friends suggested an algorithm to choose a name for her. Eleven wants her name to have exactly *n* characters.
Her friend suggested that her name should only consist of uppercase and lowercase letters 'O'. More precisely, they suggested that the ... | The first and only line of input contains an integer *n* (1<=≤<=*n*<=≤<=1000). | Print Eleven's new name on the first and only line of output. | [
"8\n",
"15\n"
] | [
"OOOoOooO\n",
"OOOoOooOooooOoo\n"
] | none | 500 | [
{
"input": "8",
"output": "OOOoOooO"
},
{
"input": "15",
"output": "OOOoOooOooooOoo"
},
{
"input": "85",
"output": "OOOoOooOooooOoooooooOooooooooooooOooooooooooooooooooooOoooooooooooooooooooooooooooooo"
},
{
"input": "381",
"output": "OOOoOooOooooOoooooooOooooooooooooOooo... | 1,557,246,321 | 2,147,483,647 | Python 3 | OK | TESTS | 18 | 124 | 0 | n = int(input())
def fib(n):
if n <= 2:
return 1
else:
return fib(n - 2) + fib(n - 1)
letters = ['o' for _ in range(n)]
a = 1
while fib(a) <= n:
letters[fib(a)-1] = 'O'
a += 1
print(''.join(letters))
| Title: Eleven
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Eleven wants to choose a new name for herself. As a bunch of geeks, her friends suggested an algorithm to choose a name for her. Eleven wants her name to have exactly *n* characters.
Her friend suggested that her name should o... | ```python
n = int(input())
def fib(n):
if n <= 2:
return 1
else:
return fib(n - 2) + fib(n - 1)
letters = ['o' for _ in range(n)]
a = 1
while fib(a) <= n:
letters[fib(a)-1] = 'O'
a += 1
print(''.join(letters))
``` | 3 | |
440 | C | One-Based Arithmetic | PROGRAMMING | 1,800 | [
"brute force",
"dfs and similar",
"divide and conquer"
] | null | null | Prof. Vasechkin wants to represent positive integer *n* as a sum of addends, where each addends is an integer number containing only 1s. For example, he can represent 121 as 121=111+11+–1. Help him to find the least number of digits 1 in such sum. | The first line of the input contains integer *n* (1<=≤<=*n*<=<<=1015). | Print expected minimal number of digits 1. | [
"121\n"
] | [
"6\n"
] | none | 1,500 | [
{
"input": "121",
"output": "6"
},
{
"input": "10",
"output": "3"
},
{
"input": "72",
"output": "15"
},
{
"input": "1",
"output": "1"
},
{
"input": "2",
"output": "2"
},
{
"input": "3",
"output": "3"
},
{
"input": "4",
"output": "4"
}... | 1,401,811,625 | 2,225 | Python 3 | WRONG_ANSWER | PRETESTS | 2 | 124 | 0 | num=int(input())
kolvoed=0
while num:
sk='1'
while int(sk)<num:
sk=sk+'1'
if(len(sk)!=1):
if (int(sk)-num)>(num-int(sk[:-1])):
num=num-int(sk[:-1])
kolvoed+=len(sk)-1
else:
num=int(sk)-num
kolvoed+=len(sk)
else:
... | Title: One-Based Arithmetic
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Prof. Vasechkin wants to represent positive integer *n* as a sum of addends, where each addends is an integer number containing only 1s. For example, he can represent 121 as 121=111+11+–1. Help him to find the leas... | ```python
num=int(input())
kolvoed=0
while num:
sk='1'
while int(sk)<num:
sk=sk+'1'
if(len(sk)!=1):
if (int(sk)-num)>(num-int(sk[:-1])):
num=num-int(sk[:-1])
kolvoed+=len(sk)-1
else:
num=int(sk)-num
kolvoed+=len(sk)
els... | 0 | |
678 | A | Johny Likes Numbers | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | Johny likes numbers *n* and *k* very much. Now Johny wants to find the smallest integer *x* greater than *n*, so it is divisible by the number *k*. | The only line contains two integers *n* and *k* (1<=≤<=*n*,<=*k*<=≤<=109). | Print the smallest integer *x*<=><=*n*, so it is divisible by the number *k*. | [
"5 3\n",
"25 13\n",
"26 13\n"
] | [
"6\n",
"26\n",
"39\n"
] | none | 0 | [
{
"input": "5 3",
"output": "6"
},
{
"input": "25 13",
"output": "26"
},
{
"input": "26 13",
"output": "39"
},
{
"input": "1 1",
"output": "2"
},
{
"input": "8 8",
"output": "16"
},
{
"input": "14 15",
"output": "15"
},
{
"input": "197 894"... | 1,570,699,139 | 2,147,483,647 | Python 3 | OK | TESTS | 37 | 109 | 0 | n, k = map(int, input().split())
if n/k != int(n/k):
print(k*(int(n/k)+1))
else:
print((n//k+1)*k)
| Title: Johny Likes Numbers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Johny likes numbers *n* and *k* very much. Now Johny wants to find the smallest integer *x* greater than *n*, so it is divisible by the number *k*.
Input Specification:
The only line contains two integers *n* and *... | ```python
n, k = map(int, input().split())
if n/k != int(n/k):
print(k*(int(n/k)+1))
else:
print((n//k+1)*k)
``` | 3 | |
185 | A | Plant | PROGRAMMING | 1,300 | [
"math"
] | null | null | Dwarfs have planted a very interesting plant, which is a triangle directed "upwards". This plant has an amusing feature. After one year a triangle plant directed "upwards" divides into four triangle plants: three of them will point "upwards" and one will point "downwards". After another year, each triangle plant divide... | The first line contains a single integer *n* (0<=≤<=*n*<=≤<=1018) — the number of full years when the plant grew.
Please do not use the %lld specifier to read or write 64-bit integers in С++. It is preferred to use cin, cout streams or the %I64d specifier. | Print a single integer — the remainder of dividing the number of plants that will point "upwards" in *n* years by 1000000007 (109<=+<=7). | [
"1\n",
"2\n"
] | [
"3\n",
"10\n"
] | The first test sample corresponds to the second triangle on the figure in the statement. The second test sample corresponds to the third one. | 500 | [
{
"input": "1",
"output": "3"
},
{
"input": "2",
"output": "10"
},
{
"input": "385599124",
"output": "493875375"
},
{
"input": "989464295",
"output": "31966163"
},
{
"input": "376367012",
"output": "523204186"
},
{
"input": "529357306",
"output": "... | 1,548,850,538 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 8 | 498 | 6,553,600 | def exp(n, k, mod):
if k == 0:
return 1
ans = exp(n, k // 2, mod)
ans = (ans * ans) % mod
if k & 1 != 0:
ans = (ans * n) % mod
return ans
def main():
mod = 1000000000 + 7
n = int(input())
ans = ((1 + exp(2, n, mod)) * exp(2, n - 1, mod)) % mod
print(ans)
return 0
main() | Title: Plant
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Dwarfs have planted a very interesting plant, which is a triangle directed "upwards". This plant has an amusing feature. After one year a triangle plant directed "upwards" divides into four triangle plants: three of them will poi... | ```python
def exp(n, k, mod):
if k == 0:
return 1
ans = exp(n, k // 2, mod)
ans = (ans * ans) % mod
if k & 1 != 0:
ans = (ans * n) % mod
return ans
def main():
mod = 1000000000 + 7
n = int(input())
ans = ((1 + exp(2, n, mod)) * exp(2, n - 1, mod)) % mod
print(ans)
return 0
main()
``` | -1 | |
474 | B | Worms | PROGRAMMING | 1,200 | [
"binary search",
"implementation"
] | null | null | It is lunch time for Mole. His friend, Marmot, prepared him a nice game for lunch.
Marmot brought Mole *n* ordered piles of worms such that *i*-th pile contains *a**i* worms. He labeled all these worms with consecutive integers: worms in first pile are labeled with numbers 1 to *a*1, worms in second pile are labeled w... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=105), the number of piles.
The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=103, *a*1<=+<=*a*2<=+<=...<=+<=*a**n*<=≤<=106), where *a**i* is the number of worms in the *i*-th pile.
The third line contains single integer *m* (... | Print *m* lines to the standard output. The *i*-th line should contain an integer, representing the number of the pile where the worm labeled with the number *q**i* is. | [
"5\n2 7 3 4 9\n3\n1 25 11\n"
] | [
"1\n5\n3\n"
] | For the sample input:
- The worms with labels from [1, 2] are in the first pile. - The worms with labels from [3, 9] are in the second pile. - The worms with labels from [10, 12] are in the third pile. - The worms with labels from [13, 16] are in the fourth pile. - The worms with labels from [17, 25] are in the f... | 1,000 | [
{
"input": "5\n2 7 3 4 9\n3\n1 25 11",
"output": "1\n5\n3"
}
] | 1,674,151,139 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 2 | 1,000 | 409,600 | n=int(input())
l1=[]
l1.append([int(x) for x in input().split()])
k=int(input())
l2=[]
l2.append([int(x) for x in input().split()])
sum=0
l3=[]
for i in range(n):
sum=sum+l1[0][i]
l3.append(sum)
for i in l2[0]:
j=0
while i>l3[j]:
j=j+1
print(j+1) | Title: Worms
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
It is lunch time for Mole. His friend, Marmot, prepared him a nice game for lunch.
Marmot brought Mole *n* ordered piles of worms such that *i*-th pile contains *a**i* worms. He labeled all these worms with consecutive integers:... | ```python
n=int(input())
l1=[]
l1.append([int(x) for x in input().split()])
k=int(input())
l2=[]
l2.append([int(x) for x in input().split()])
sum=0
l3=[]
for i in range(n):
sum=sum+l1[0][i]
l3.append(sum)
for i in l2[0]:
j=0
while i>l3[j]:
j=j+1
print(j+1)
``` | 0 | |
462 | A | Appleman and Easy Task | PROGRAMMING | 1,000 | [
"brute force",
"implementation"
] | null | null | Toastman came up with a very easy task. He gives it to Appleman, but Appleman doesn't know how to solve it. Can you help him?
Given a *n*<=×<=*n* checkerboard. Each cell of the board has either character 'x', or character 'o'. Is it true that each cell of the board has even number of adjacent cells with 'o'? Two cells... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=100). Then *n* lines follow containing the description of the checkerboard. Each of them contains *n* characters (either 'x' or 'o') without spaces. | Print "YES" or "NO" (without the quotes) depending on the answer to the problem. | [
"3\nxxo\nxox\noxx\n",
"4\nxxxo\nxoxo\noxox\nxxxx\n"
] | [
"YES\n",
"NO\n"
] | none | 500 | [
{
"input": "3\nxxo\nxox\noxx",
"output": "YES"
},
{
"input": "4\nxxxo\nxoxo\noxox\nxxxx",
"output": "NO"
},
{
"input": "1\no",
"output": "YES"
},
{
"input": "2\nox\nxo",
"output": "YES"
},
{
"input": "2\nxx\nxo",
"output": "NO"
},
{
"input": "3\nooo\no... | 1,680,972,194 | 2,147,483,647 | Python 3 | OK | TESTS | 32 | 46 | 0 | n = int(input())
a = [input() for _ in range(n)]
for i in range(n):
for j in range(n):
cnt = 0
if i > 0:
cnt += a[i-1][j] == 'o'
if i < n-1:
cnt += a[i+1][j] == 'o'
if j > 0:
cnt += a[i][j-1] == 'o'
if j < n-1:
cnt +... | Title: Appleman and Easy Task
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Toastman came up with a very easy task. He gives it to Appleman, but Appleman doesn't know how to solve it. Can you help him?
Given a *n*<=×<=*n* checkerboard. Each cell of the board has either character 'x', or... | ```python
n = int(input())
a = [input() for _ in range(n)]
for i in range(n):
for j in range(n):
cnt = 0
if i > 0:
cnt += a[i-1][j] == 'o'
if i < n-1:
cnt += a[i+1][j] == 'o'
if j > 0:
cnt += a[i][j-1] == 'o'
if j < n-1:
... | 3 | |
898 | A | Rounding | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | Vasya has a non-negative integer *n*. He wants to round it to nearest integer, which ends up with 0. If *n* already ends up with 0, Vasya considers it already rounded.
For example, if *n*<==<=4722 answer is 4720. If *n*<==<=5 Vasya can round it to 0 or to 10. Both ways are correct.
For given *n* find out to which int... | The first line contains single integer *n* (0<=≤<=*n*<=≤<=109) — number that Vasya has. | Print result of rounding *n*. Pay attention that in some cases answer isn't unique. In that case print any correct answer. | [
"5\n",
"113\n",
"1000000000\n",
"5432359\n"
] | [
"0\n",
"110\n",
"1000000000\n",
"5432360\n"
] | In the first example *n* = 5. Nearest integers, that ends up with zero are 0 and 10. Any of these answers is correct, so you can print 0 or 10. | 500 | [
{
"input": "5",
"output": "0"
},
{
"input": "113",
"output": "110"
},
{
"input": "1000000000",
"output": "1000000000"
},
{
"input": "5432359",
"output": "5432360"
},
{
"input": "999999994",
"output": "999999990"
},
{
"input": "10",
"output": "10"
... | 1,630,909,419 | 2,147,483,647 | Python 3 | OK | TESTS | 64 | 78 | 6,758,400 | n = int(input())
m = n % 10
if m > 5:
n = n - m + 10
else:
n = n - m
print(n)
| Title: Rounding
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya has a non-negative integer *n*. He wants to round it to nearest integer, which ends up with 0. If *n* already ends up with 0, Vasya considers it already rounded.
For example, if *n*<==<=4722 answer is 4720. If *n*<==<=5... | ```python
n = int(input())
m = n % 10
if m > 5:
n = n - m + 10
else:
n = n - m
print(n)
``` | 3 | |
507 | B | Amr and Pins | PROGRAMMING | 1,400 | [
"geometry",
"math"
] | null | null | Amr loves Geometry. One day he came up with a very interesting problem.
Amr has a circle of radius *r* and center in point (*x*,<=*y*). He wants the circle center to be in new position (*x*',<=*y*').
In one step Amr can put a pin to the border of the circle in a certain point, then rotate the circle around that pin b... | Input consists of 5 space-separated integers *r*, *x*, *y*, *x*' *y*' (1<=≤<=*r*<=≤<=105, <=-<=105<=≤<=*x*,<=*y*,<=*x*',<=*y*'<=≤<=105), circle radius, coordinates of original center of the circle and coordinates of destination center of the circle respectively. | Output a single integer — minimum number of steps required to move the center of the circle to the destination point. | [
"2 0 0 0 4\n",
"1 1 1 4 4\n",
"4 5 6 5 6\n"
] | [
"1\n",
"3\n",
"0\n"
] | In the first sample test the optimal way is to put a pin at point (0, 2) and rotate the circle by 180 degrees counter-clockwise (or clockwise, no matter).
<img class="tex-graphics" src="https://espresso.codeforces.com/4e40fd4cc24a2050a0488aa131e6244369328039.png" style="max-width: 100.0%;max-height: 100.0%;"/> | 1,000 | [
{
"input": "2 0 0 0 4",
"output": "1"
},
{
"input": "1 1 1 4 4",
"output": "3"
},
{
"input": "4 5 6 5 6",
"output": "0"
},
{
"input": "10 20 0 40 0",
"output": "1"
},
{
"input": "9 20 0 40 0",
"output": "2"
},
{
"input": "5 -1 -6 -5 1",
"output": "... | 1,640,249,866 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 37 | 108 | 0 | r, x, y, x1, y1 = [int(i) for i in input().split()]
t = ((x - x1) ** 2 + (y - y1) ** 2) ** 0.5
d = 2 * r
s = t // d
s = s if t % d == 0 else s + 1
print(int(s)) | Title: Amr and Pins
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Amr loves Geometry. One day he came up with a very interesting problem.
Amr has a circle of radius *r* and center in point (*x*,<=*y*). He wants the circle center to be in new position (*x*',<=*y*').
In one step Amr can ... | ```python
r, x, y, x1, y1 = [int(i) for i in input().split()]
t = ((x - x1) ** 2 + (y - y1) ** 2) ** 0.5
d = 2 * r
s = t // d
s = s if t % d == 0 else s + 1
print(int(s))
``` | 3 | |
366 | B | Dima and To-do List | PROGRAMMING | 1,200 | [
"brute force",
"implementation"
] | null | null | You helped Dima to have a great weekend, but it's time to work. Naturally, Dima, as all other men who have girlfriends, does everything wrong.
Inna and Dima are now in one room. Inna tells Dima off for everything he does in her presence. After Inna tells him off for something, she goes to another room, walks there in ... | The first line of the input contains two integers *n*,<=*k* (1<=≤<=*k*<=≤<=*n*<=≤<=105). The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=103), where *a**i* is the power Inna tells Dima off with if she is present in the room while he is doing the *i*-th task.
It is guaranteed that *n*... | In a single line print the number of the task Dima should start with to get told off with as little power as possible. If there are multiple solutions, print the one with the minimum number of the first task to do. | [
"6 2\n3 2 1 6 5 4\n",
"10 5\n1 3 5 7 9 9 4 1 8 5\n"
] | [
"1\n",
"3\n"
] | Explanation of the first example.
If Dima starts from the first task, Inna tells him off with power 3, then Dima can do one more task (as *k* = 2), then Inna tells him off for the third task with power 1, then she tells him off for the fifth task with power 5. Thus, Dima gets told off with total power 3 + 1 + 5 = 9. I... | 1,000 | [
{
"input": "6 2\n3 2 1 6 5 4",
"output": "1"
},
{
"input": "10 5\n1 3 5 7 9 9 4 1 8 5",
"output": "3"
},
{
"input": "20 4\n1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1",
"output": "1"
},
{
"input": "10 10\n8 4 5 7 6 9 2 2 3 5",
"output": "7"
},
{
"input": "50 10\n1 2 3... | 1,467,113,695 | 2,147,483,647 | Python 3 | OK | TESTS | 36 | 155 | 6,963,200 | n, k = map(int, input().split())
a = list(map(int, input().split()))
ind = [x for x in range(0,n,k)]
m=1e8
mi=0
for i in range(0,k):
x=sum(a[i+j] for j in ind)
if x<m:
m=x
mi=i
print(mi+1) | Title: Dima and To-do List
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You helped Dima to have a great weekend, but it's time to work. Naturally, Dima, as all other men who have girlfriends, does everything wrong.
Inna and Dima are now in one room. Inna tells Dima off for everything h... | ```python
n, k = map(int, input().split())
a = list(map(int, input().split()))
ind = [x for x in range(0,n,k)]
m=1e8
mi=0
for i in range(0,k):
x=sum(a[i+j] for j in ind)
if x<m:
m=x
mi=i
print(mi+1)
``` | 3 | |
233 | A | Perfect Permutation | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | A permutation is a sequence of integers *p*1,<=*p*2,<=...,<=*p**n*, consisting of *n* distinct positive integers, each of them doesn't exceed *n*. Let's denote the *i*-th element of permutation *p* as *p**i*. We'll call number *n* the size of permutation *p*1,<=*p*2,<=...,<=*p**n*.
Nickolas adores permutations. He lik... | A single line contains a single integer *n* (1<=≤<=*n*<=≤<=100) — the permutation size. | If a perfect permutation of size *n* doesn't exist, print a single integer -1. Otherwise print *n* distinct integers from 1 to *n*, *p*1,<=*p*2,<=...,<=*p**n* — permutation *p*, that is perfect. Separate printed numbers by whitespaces. | [
"1\n",
"2\n",
"4\n"
] | [
"-1\n",
"2 1 \n",
"2 1 4 3 \n"
] | none | 500 | [
{
"input": "1",
"output": "-1"
},
{
"input": "2",
"output": "2 1 "
},
{
"input": "4",
"output": "2 1 4 3 "
},
{
"input": "3",
"output": "-1"
},
{
"input": "5",
"output": "-1"
},
{
"input": "6",
"output": "2 1 4 3 6 5 "
},
{
"input": "7",
... | 1,671,109,367 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 7 | 92 | 0 | n = int(input())
if n%2!=0:
print(-1)
else:
if n==2:
print("2 1")
elif n==4:
print("2 1 4 3")
elif n==6:
print("2 1 4 3 6 5")
elif n==8:
print("2 1 4 3 6 5 8 7")
elif n==10:
print("2 1 4 3 6 5 8 7 10 9")
elif n==12:
print("2 1 4 ... | Title: Perfect Permutation
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A permutation is a sequence of integers *p*1,<=*p*2,<=...,<=*p**n*, consisting of *n* distinct positive integers, each of them doesn't exceed *n*. Let's denote the *i*-th element of permutation *p* as *p**i*. We'll ... | ```python
n = int(input())
if n%2!=0:
print(-1)
else:
if n==2:
print("2 1")
elif n==4:
print("2 1 4 3")
elif n==6:
print("2 1 4 3 6 5")
elif n==8:
print("2 1 4 3 6 5 8 7")
elif n==10:
print("2 1 4 3 6 5 8 7 10 9")
elif n==12:
pri... | 0 | |
443 | A | Anton and Letters | PROGRAMMING | 800 | [
"constructive algorithms",
"implementation"
] | null | null | Recently, Anton has found a set. The set consists of small English letters. Anton carefully wrote out all the letters from the set in one line, separated by a comma. He also added an opening curved bracket at the beginning of the line and a closing curved bracket at the end of the line.
Unfortunately, from time to ti... | The first and the single line contains the set of letters. The length of the line doesn't exceed 1000. It is guaranteed that the line starts from an opening curved bracket and ends with a closing curved bracket. Between them, small English letters are listed, separated by a comma. Each comma is followed by a space. | Print a single number — the number of distinct letters in Anton's set. | [
"{a, b, c}\n",
"{b, a, b, a}\n",
"{}\n"
] | [
"3\n",
"2\n",
"0\n"
] | none | 500 | [
{
"input": "{a, b, c}",
"output": "3"
},
{
"input": "{b, a, b, a}",
"output": "2"
},
{
"input": "{}",
"output": "0"
},
{
"input": "{a, a, c, b, b, b, c, c, c, c}",
"output": "3"
},
{
"input": "{a, c, b, b}",
"output": "3"
},
{
"input": "{a, b}",
"o... | 1,692,792,837 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 27 | 62 | 0 | n=input()
l=[]
for i in n:
if (ord(i)>=65 and ord(i)<=90) or (ord(i)>=97 and ord(i)<=122):
l+=i
print(len(set(l))) | Title: Anton and Letters
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Recently, Anton has found a set. The set consists of small English letters. Anton carefully wrote out all the letters from the set in one line, separated by a comma. He also added an opening curved bracket at the begi... | ```python
n=input()
l=[]
for i in n:
if (ord(i)>=65 and ord(i)<=90) or (ord(i)>=97 and ord(i)<=122):
l+=i
print(len(set(l)))
``` | 3 | |
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... | 1,473,870,987 | 2,147,483,647 | Python 3 | OK | TESTS | 33 | 935 | 45,158,400 | #!/usr/bin/env python3
# pylint: disable = bad-whitespace
# pylint: disable = invalid-name
# pylint: disable = missing-docstring
# pylint: disable = too-few-public-methods
# -----------
# Dijkstra.py
# -----------
"""
C. Dijkstra?
http://codeforces.com/problemset/problem/20/C/
Thu, 18 Oct 2015
Python 3.4: 779 ms
1... | 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
#!/usr/bin/env python3
# pylint: disable = bad-whitespace
# pylint: disable = invalid-name
# pylint: disable = missing-docstring
# pylint: disable = too-few-public-methods
# -----------
# Dijkstra.py
# -----------
"""
C. Dijkstra?
http://codeforces.com/problemset/problem/20/C/
Thu, 18 Oct 2015
Python 3.4:... | 3.196044 |
660 | E | Different Subsets For All Tuples | PROGRAMMING | 2,300 | [
"combinatorics",
"math"
] | null | null | For a sequence *a* of *n* integers between 1 and *m*, inclusive, denote *f*(*a*) as the number of distinct subsequences of *a* (including the empty subsequence).
You are given two positive integers *n* and *m*. Let *S* be the set of all sequences of length *n* consisting of numbers from 1 to *m*. Compute the sum *f*(*... | The only line contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=106) — the number of elements in arrays and the upper bound for elements. | Print the only integer *c* — the desired sum modulo 109<=+<=7. | [
"1 3\n",
"2 2\n",
"3 3\n"
] | [
"6\n",
"14\n",
"174\n"
] | none | 0 | [
{
"input": "1 3",
"output": "6"
},
{
"input": "2 2",
"output": "14"
},
{
"input": "3 3",
"output": "174"
},
{
"input": "1 1000000",
"output": "2000000"
},
{
"input": "1000000 1",
"output": "1000001"
},
{
"input": "500 500",
"output": "383255233"
... | 1,658,949,297 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 4 | 46 | 0 | p = 10**9+7
def process(n, m):
answer = pow(m, n, p)
answer2 = pow(m, n, p)
m1 = pow(m, p-2, p)
X = ((2*m-1)*m1) % p
num = pow(X, n, p)-1
den = (X-1) % p
den1 = pow(den, p-2, p)
answer2 = (answer2*num*den1) % p
answer = (answer+answer2) % p
print(answer)
n, m = [int(x... | Title: Different Subsets For All Tuples
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
For a sequence *a* of *n* integers between 1 and *m*, inclusive, denote *f*(*a*) as the number of distinct subsequences of *a* (including the empty subsequence).
You are given two positive integers *n*... | ```python
p = 10**9+7
def process(n, m):
answer = pow(m, n, p)
answer2 = pow(m, n, p)
m1 = pow(m, p-2, p)
X = ((2*m-1)*m1) % p
num = pow(X, n, p)-1
den = (X-1) % p
den1 = pow(den, p-2, p)
answer2 = (answer2*num*den1) % p
answer = (answer+answer2) % p
print(answer)
n, ... | 0 | |
302 | B | Eugeny and Play List | PROGRAMMING | 1,200 | [
"binary search",
"implementation",
"two pointers"
] | null | null | Eugeny loves listening to music. He has *n* songs in his play list. We know that song number *i* has the duration of *t**i* minutes. Eugeny listens to each song, perhaps more than once. He listens to song number *i* *c**i* times. Eugeny's play list is organized as follows: first song number 1 plays *c*1 times, then son... | The first line contains two integers *n*, *m* (1<=≤<=*n*,<=*m*<=≤<=105). The next *n* lines contain pairs of integers. The *i*-th line contains integers *c**i*,<=*t**i* (1<=≤<=*c**i*,<=*t**i*<=≤<=109) — the description of the play list. It is guaranteed that the play list's total duration doesn't exceed 109 .
The next... | Print *m* integers — the *i*-th number must equal the number of the song that was playing during the *v**i*-th minute after Eugeny started listening to the play list. | [
"1 2\n2 8\n1 16\n",
"4 9\n1 2\n2 1\n1 1\n2 2\n1 2 3 4 5 6 7 8 9\n"
] | [
"1\n1\n",
"1\n1\n2\n2\n3\n4\n4\n4\n4\n"
] | none | 1,000 | [
{
"input": "1 2\n2 8\n1 16",
"output": "1\n1"
},
{
"input": "4 9\n1 2\n2 1\n1 1\n2 2\n1 2 3 4 5 6 7 8 9",
"output": "1\n1\n2\n2\n3\n4\n4\n4\n4"
},
{
"input": "3 3\n2 8\n5 1\n10 5\n13 16 62",
"output": "1\n1\n3"
},
{
"input": "4 4\n2 8\n2 2\n6 3\n8 7\n13 23 29 85",
"output... | 1,616,854,557 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 11 | 2,000 | 11,366,400 | string = input().split()
numList = list(map(int, string))
n = numList[0]
m = numList[1]
count = 0
moments = []
for i in range(n):
music = list(map(int, input().split()))
moments.append(count + music[0]*music[1])
count = count + music[0]*music[1]
times = list(map(int, input().split()))
for i in range(m):
... | Title: Eugeny and Play List
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Eugeny loves listening to music. He has *n* songs in his play list. We know that song number *i* has the duration of *t**i* minutes. Eugeny listens to each song, perhaps more than once. He listens to song number *i... | ```python
string = input().split()
numList = list(map(int, string))
n = numList[0]
m = numList[1]
count = 0
moments = []
for i in range(n):
music = list(map(int, input().split()))
moments.append(count + music[0]*music[1])
count = count + music[0]*music[1]
times = list(map(int, input().split()))
for i in ra... | 0 | |
912 | B | New Year's Eve | PROGRAMMING | 1,300 | [
"bitmasks",
"constructive algorithms",
"number theory"
] | null | null | Since Grisha behaved well last year, at New Year's Eve he was visited by Ded Moroz who brought an enormous bag of gifts with him! The bag contains *n* sweet candies from the good ol' bakery, each labeled from 1 to *n* corresponding to its tastiness. No two candies have the same tastiness.
The choice of candies has a d... | The sole string contains two integers *n* and *k* (1<=≤<=*k*<=≤<=*n*<=≤<=1018). | Output one number — the largest possible xor-sum. | [
"4 3\n",
"6 6\n"
] | [
"7\n",
"7\n"
] | In the first sample case, one optimal answer is 1, 2 and 4, giving the xor-sum of 7.
In the second sample case, one can, for example, take all six candies and obtain the xor-sum of 7. | 1,000 | [
{
"input": "4 3",
"output": "7"
},
{
"input": "6 6",
"output": "7"
},
{
"input": "2 2",
"output": "3"
},
{
"input": "1022 10",
"output": "1023"
},
{
"input": "415853337373441 52",
"output": "562949953421311"
},
{
"input": "75 12",
"output": "127"
... | 1,516,681,838 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 8 | 46 | 5,632,000 | from math import log
n,k=map(int,input().split())
print(2**(min(k,int(log(n,2))+1))-1) | Title: New Year's Eve
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Since Grisha behaved well last year, at New Year's Eve he was visited by Ded Moroz who brought an enormous bag of gifts with him! The bag contains *n* sweet candies from the good ol' bakery, each labeled from 1 to *n* co... | ```python
from math import log
n,k=map(int,input().split())
print(2**(min(k,int(log(n,2))+1))-1)
``` | 0 | |
931 | A | Friends Meeting | PROGRAMMING | 800 | [
"brute force",
"greedy",
"implementation",
"math"
] | null | null | Two friends are on the coordinate axis *Ox* in points with integer coordinates. One of them is in the point *x*1<==<=*a*, another one is in the point *x*2<==<=*b*.
Each of the friends can move by one along the line in any direction unlimited number of times. When a friend moves, the tiredness of a friend changes acco... | The first line contains a single integer *a* (1<=≤<=*a*<=≤<=1000) — the initial position of the first friend.
The second line contains a single integer *b* (1<=≤<=*b*<=≤<=1000) — the initial position of the second friend.
It is guaranteed that *a*<=≠<=*b*. | Print the minimum possible total tiredness if the friends meet in the same point. | [
"3\n4\n",
"101\n99\n",
"5\n10\n"
] | [
"1\n",
"2\n",
"9\n"
] | In the first example the first friend should move by one to the right (then the meeting happens at point 4), or the second friend should move by one to the left (then the meeting happens at point 3). In both cases, the total tiredness becomes 1.
In the second example the first friend should move by one to the left, an... | 500 | [
{
"input": "3\n4",
"output": "1"
},
{
"input": "101\n99",
"output": "2"
},
{
"input": "5\n10",
"output": "9"
},
{
"input": "1\n2",
"output": "1"
},
{
"input": "1\n1000",
"output": "250000"
},
{
"input": "999\n1000",
"output": "1"
},
{
"inpu... | 1,559,676,604 | 2,147,483,647 | Python 3 | OK | TESTS | 40 | 108 | 0 | a=int(input())
b=int(input())
l=int((a+b)/2)
c=0
for i in range(1,abs(l-a)+1):
c+=i
for i in range(1,abs(l-b)+1):
c+=i
print(c) | Title: Friends Meeting
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Two friends are on the coordinate axis *Ox* in points with integer coordinates. One of them is in the point *x*1<==<=*a*, another one is in the point *x*2<==<=*b*.
Each of the friends can move by one along the line in... | ```python
a=int(input())
b=int(input())
l=int((a+b)/2)
c=0
for i in range(1,abs(l-a)+1):
c+=i
for i in range(1,abs(l-b)+1):
c+=i
print(c)
``` | 3 | |
556 | A | Case of the Zeros and Ones | PROGRAMMING | 900 | [
"greedy"
] | null | null | Andrewid the Android is a galaxy-famous detective. In his free time he likes to think about strings containing zeros and ones.
Once he thought about a string of length *n* consisting of zeroes and ones. Consider the following operation: we choose any two adjacent positions in the string, and if one them contains 0, an... | First line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=2·105), the length of the string that Andreid has.
The second line contains the string of length *n* consisting only from zeros and ones. | Output the minimum length of the string that may remain after applying the described operations several times. | [
"4\n1100\n",
"5\n01010\n",
"8\n11101111\n"
] | [
"0\n",
"1\n",
"6\n"
] | In the first sample test it is possible to change the string like the following: <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/10df55364c21c6e8d5da31b6ab6f6294c4fc26b3.png" style="max-width: 100.0%;max-height: 100.0%;"/>.
In the second sample test it is possible to change the string like... | 250 | [
{
"input": "4\n1100",
"output": "0"
},
{
"input": "5\n01010",
"output": "1"
},
{
"input": "8\n11101111",
"output": "6"
},
{
"input": "1\n0",
"output": "1"
},
{
"input": "1\n1",
"output": "1"
},
{
"input": "2\n00",
"output": "2"
},
{
"input"... | 1,675,053,352 | 2,147,483,647 | Python 3 | OK | TESTS | 49 | 46 | 409,600 | sunn=int(input())
f=input()
z=f.count('0')
o=f.count('1')
print(sunn-(2*min(z,o))) | Title: Case of the Zeros and Ones
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Andrewid the Android is a galaxy-famous detective. In his free time he likes to think about strings containing zeros and ones.
Once he thought about a string of length *n* consisting of zeroes and ones. Cons... | ```python
sunn=int(input())
f=input()
z=f.count('0')
o=f.count('1')
print(sunn-(2*min(z,o)))
``` | 3 | |
268 | A | Games | PROGRAMMING | 800 | [
"brute force"
] | null | null | Manao works on a sports TV. He's spent much time watching the football games of some country. After a while he began to notice different patterns. For example, each team has two sets of uniforms: home uniform and guest uniform. When a team plays a game at home, the players put on the home uniform. When a team plays as ... | The first line contains an integer *n* (2<=≤<=*n*<=≤<=30). Each of the following *n* lines contains a pair of distinct space-separated integers *h**i*, *a**i* (1<=≤<=*h**i*,<=*a**i*<=≤<=100) — the colors of the *i*-th team's home and guest uniforms, respectively. | In a single line print the number of games where the host team is going to play in the guest uniform. | [
"3\n1 2\n2 4\n3 4\n",
"4\n100 42\n42 100\n5 42\n100 5\n",
"2\n1 2\n1 2\n"
] | [
"1\n",
"5\n",
"0\n"
] | In the first test case the championship consists of 6 games. The only game with the event in question is the game between teams 2 and 1 on the stadium of team 2.
In the second test sample the host team will have to wear guest uniform in the games between teams: 1 and 2, 2 and 1, 2 and 3, 3 and 4, 4 and 2 (the host tea... | 500 | [
{
"input": "3\n1 2\n2 4\n3 4",
"output": "1"
},
{
"input": "4\n100 42\n42 100\n5 42\n100 5",
"output": "5"
},
{
"input": "2\n1 2\n1 2",
"output": "0"
},
{
"input": "7\n4 7\n52 55\n16 4\n55 4\n20 99\n3 4\n7 52",
"output": "6"
},
{
"input": "10\n68 42\n1 35\n25 70\n... | 1,673,026,180 | 2,147,483,647 | Python 3 | OK | TESTS | 31 | 124 | 0 | n=int(input())
num=0
a , b =[],[]
for i in range(n):
c=input().split()
a.append(c[0])
b.append(c[1])
for i in a:
num+=b.count(i)
print(num) | Title: Games
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Manao works on a sports TV. He's spent much time watching the football games of some country. After a while he began to notice different patterns. For example, each team has two sets of uniforms: home uniform and guest uniform. W... | ```python
n=int(input())
num=0
a , b =[],[]
for i in range(n):
c=input().split()
a.append(c[0])
b.append(c[1])
for i in a:
num+=b.count(i)
print(num)
``` | 3 | |
279 | B | Books | PROGRAMMING | 1,400 | [
"binary search",
"brute force",
"implementation",
"two pointers"
] | null | null | When Valera has got some free time, he goes to the library to read some books. Today he's got *t* free minutes to read. That's why Valera took *n* books in the library and for each book he estimated the time he is going to need to read it. Let's number the books by integers from 1 to *n*. Valera needs *a**i* minutes to... | The first line contains two integers *n* and *t* (1<=≤<=*n*<=≤<=105; 1<=≤<=*t*<=≤<=109) — the number of books and the number of free minutes Valera's got. The second line contains a sequence of *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=104), where number *a**i* shows the number of minutes that the boy n... | Print a single integer — the maximum number of books Valera can read. | [
"4 5\n3 1 2 1\n",
"3 3\n2 2 3\n"
] | [
"3\n",
"1\n"
] | none | 1,000 | [
{
"input": "4 5\n3 1 2 1",
"output": "3"
},
{
"input": "3 3\n2 2 3",
"output": "1"
},
{
"input": "1 3\n5",
"output": "0"
},
{
"input": "1 10\n4",
"output": "1"
},
{
"input": "2 10\n6 4",
"output": "2"
},
{
"input": "6 10\n2 3 4 2 1 1",
"output": "4... | 1,678,175,635 | 2,147,483,647 | PyPy 3-64 | RUNTIME_ERROR | TESTS | 0 | 154 | 2,764,800 | import sys
n, t = map(int, sys.stdin.readline().split())
a = [*map(int, sys.stdin.readline().split())]
for i in range(a):
if sum(a[i:]) <= t:
sys.stdout.write(len(a[i:]))
sys.exit() | Title: Books
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
When Valera has got some free time, he goes to the library to read some books. Today he's got *t* free minutes to read. That's why Valera took *n* books in the library and for each book he estimated the time he is going to need t... | ```python
import sys
n, t = map(int, sys.stdin.readline().split())
a = [*map(int, sys.stdin.readline().split())]
for i in range(a):
if sum(a[i:]) <= t:
sys.stdout.write(len(a[i:]))
sys.exit()
``` | -1 | |
181 | A | Series of Crimes | PROGRAMMING | 800 | [
"brute force",
"geometry",
"implementation"
] | null | null | The Berland capital is shaken with three bold crimes committed by the Pihsters, a notorious criminal gang.
The Berland capital's map is represented by an *n*<=×<=*m* rectangular table. Each cell of the table on the map represents some districts of the capital.
The capital's main detective Polycarpus took a map and m... | The first line contains two space-separated integers *n* and *m* (2<=≤<=*n*,<=*m*<=≤<=100) — the number of rows and columns in the table, correspondingly.
Each of the next *n* lines contains *m* characters — the description of the capital's map. Each character can either be a "." (dot), or an "*" (asterisk). A charact... | Print two integers — the number of the row and the number of the column of the city district that is the fourth one to be robbed. The rows are numbered starting from one from top to bottom and the columns are numbered starting from one from left to right. | [
"3 2\n.*\n..\n**\n",
"3 3\n*.*\n*..\n...\n"
] | [
"1 1\n",
"2 3\n"
] | none | 500 | [
{
"input": "3 2\n.*\n..\n**",
"output": "1 1"
},
{
"input": "2 5\n*....\n*...*",
"output": "1 5"
},
{
"input": "7 2\n..\n**\n..\n..\n..\n..\n.*",
"output": "7 1"
},
{
"input": "7 2\n*.\n..\n..\n..\n..\n..\n**",
"output": "1 2"
},
{
"input": "2 10\n*......*..\n....... | 1,451,581,371 | 2,147,483,647 | Python 3 | OK | TESTS | 36 | 124 | 0 | n, m = map(int, input().split())
r, c = [0] * n, [0] * m
for i in range(n):
for j, ch in enumerate(input()):
if ch == '*':
r[i] += 1
c[j] += 1
print(r.index(1) + 1, c.index(1) + 1)
| Title: Series of Crimes
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Berland capital is shaken with three bold crimes committed by the Pihsters, a notorious criminal gang.
The Berland capital's map is represented by an *n*<=×<=*m* rectangular table. Each cell of the table on the ma... | ```python
n, m = map(int, input().split())
r, c = [0] * n, [0] * m
for i in range(n):
for j, ch in enumerate(input()):
if ch == '*':
r[i] += 1
c[j] += 1
print(r.index(1) + 1, c.index(1) + 1)
``` | 3 | |
96 | A | Football | PROGRAMMING | 900 | [
"implementation",
"strings"
] | A. Football | 2 | 256 | Petya loves football very much. One day, as he was watching a football match, he was writing the players' current positions on a piece of paper. To simplify the situation he depicted it as a string consisting of zeroes and ones. A zero corresponds to players of one team; a one corresponds to players of another team. If... | The first input line contains a non-empty string consisting of characters "0" and "1", which represents players. The length of the string does not exceed 100 characters. There's at least one player from each team present on the field. | Print "YES" if the situation is dangerous. Otherwise, print "NO". | [
"001001\n",
"1000000001\n"
] | [
"NO\n",
"YES\n"
] | none | 500 | [
{
"input": "001001",
"output": "NO"
},
{
"input": "1000000001",
"output": "YES"
},
{
"input": "00100110111111101",
"output": "YES"
},
{
"input": "11110111111111111",
"output": "YES"
},
{
"input": "01",
"output": "NO"
},
{
"input": "10100101",
"outp... | 1,695,621,455 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 60 | 0 | def danger(str1):
count = 0
l = 0
r = len(str1)-1
while l<=r:
if str1[i-1] == str[i]:
count+=1
l+=1
else:
l+=1
if count >= 7:
return "YES"
return "NO"
strr = input()
print(danger(strr)) | Title: Football
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Petya loves football very much. One day, as he was watching a football match, he was writing the players' current positions on a piece of paper. To simplify the situation he depicted it as a string consisting of zeroes and ones. A... | ```python
def danger(str1):
count = 0
l = 0
r = len(str1)-1
while l<=r:
if str1[i-1] == str[i]:
count+=1
l+=1
else:
l+=1
if count >= 7:
return "YES"
return "NO"
strr = input()
print(danger(strr))
``` | -1 |
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"
},
{
... | 1,697,729,019 | 2,147,483,647 | Python 3 | OK | TESTS | 56 | 46 | 0 | s = str(input())
uppercase_test = 0
x = 0
for i in range(len(s)):
if ord(s[i])>=65 and ord(s[i])<=90:
uppercase_test += 1
for i in range(1,len(s)):
if ord(s[i])>=65 and ord(s[i])<=90:
x +=1
if (ord(s[0])>=97 and ord(s[0])<=122) and x== len(s)-1 :
print(str(s[0]).upper()+str(s[1... | 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
s = str(input())
uppercase_test = 0
x = 0
for i in range(len(s)):
if ord(s[i])>=65 and ord(s[i])<=90:
uppercase_test += 1
for i in range(1,len(s)):
if ord(s[i])>=65 and ord(s[i])<=90:
x +=1
if (ord(s[0])>=97 and ord(s[0])<=122) and x== len(s)-1 :
print(str(s[0]).upper... | 3 | |
478 | C | Table Decorations | PROGRAMMING | 1,800 | [
"greedy"
] | null | null | You have *r* red, *g* green and *b* blue balloons. To decorate a single table for the banquet you need exactly three balloons. Three balloons attached to some table shouldn't have the same color. What maximum number *t* of tables can be decorated if we know number of balloons of each color?
Your task is to write a pro... | The single line contains three integers *r*, *g* and *b* (0<=≤<=*r*,<=*g*,<=*b*<=≤<=2·109) — the number of red, green and blue baloons respectively. The numbers are separated by exactly one space. | Print a single integer *t* — the maximum number of tables that can be decorated in the required manner. | [
"5 4 3\n",
"1 1 1\n",
"2 3 3\n"
] | [
"4\n",
"1\n",
"2\n"
] | In the first sample you can decorate the tables with the following balloon sets: "rgg", "gbb", "brr", "rrg", where "r", "g" and "b" represent the red, green and blue balls, respectively. | 1,500 | [
{
"input": "5 4 3",
"output": "4"
},
{
"input": "1 1 1",
"output": "1"
},
{
"input": "2 3 3",
"output": "2"
},
{
"input": "0 1 0",
"output": "0"
},
{
"input": "0 3 3",
"output": "2"
},
{
"input": "4 0 4",
"output": "2"
},
{
"input": "100000... | 1,668,216,361 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 7 | 46 | 0 | memo = {}
def solve_1(a , b, c):
global memo
a , b , c = sorted([a , b , c])
if (a+b+c) < 3:
return 0
if (a+b == 0 or b + c == 0 or c+a == 0):
return 0
if (a,b,c) in memo:
return memo[(a , b , c)]
ans1 = min(a,b,c)
if(ans1 > 0):
ans1 +... | Title: Table Decorations
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You have *r* red, *g* green and *b* blue balloons. To decorate a single table for the banquet you need exactly three balloons. Three balloons attached to some table shouldn't have the same color. What maximum number *... | ```python
memo = {}
def solve_1(a , b, c):
global memo
a , b , c = sorted([a , b , c])
if (a+b+c) < 3:
return 0
if (a+b == 0 or b + c == 0 or c+a == 0):
return 0
if (a,b,c) in memo:
return memo[(a , b , c)]
ans1 = min(a,b,c)
if(ans1 > 0):
... | 0 | |
685 | B | Kay and Snowflake | PROGRAMMING | 1,900 | [
"data structures",
"dfs and similar",
"dp",
"trees"
] | null | null | After the piece of a devilish mirror hit the Kay's eye, he is no longer interested in the beauty of the roses. Now he likes to watch snowflakes.
Once upon a time, he found a huge snowflake that has a form of the tree (connected acyclic graph) consisting of *n* nodes. The root of tree has index 1. Kay is very intereste... | The first line of the input contains two integers *n* and *q* (2<=≤<=*n*<=≤<=300<=000, 1<=≤<=*q*<=≤<=300<=000) — the size of the initial tree and the number of queries respectively.
The second line contains *n*<=-<=1 integer *p*2,<=*p*3,<=...,<=*p**n* (1<=≤<=*p**i*<=≤<=*n*) — the indices of the parents of the nodes fr... | For each query print the index of a centroid of the corresponding subtree. If there are many suitable nodes, print any of them. It's guaranteed, that each subtree has at least one centroid. | [
"7 4\n1 1 3 3 5 3\n1\n2\n3\n5\n"
] | [
"3\n2\n3\n6\n"
] | The first query asks for a centroid of the whole tree — this is node 3. If we delete node 3 the tree will split in four components, two of size 1 and two of size 2.
The subtree of the second node consists of this node only, so the answer is 2.
Node 3 is centroid of its own subtree.
The centroids of the subtree of th... | 1,250 | [
{
"input": "7 4\n1 1 3 3 5 3\n1\n2\n3\n5",
"output": "3\n2\n3\n6"
},
{
"input": "2 2\n1\n1\n2",
"output": "2\n2"
}
] | 1,644,550,239 | 6,699 | PyPy 3-64 | WRONG_ANSWER | TESTS | 2 | 872 | 70,656,000 | import sys
import heapq
input = sys.stdin.buffer.readline
def process(n, P, Q):
g = [[] for i in range(n+1)]
for i in range(n-1):
i2 = i+2
j2 = P[i]
g[i2].append(j2)
g[j2].append(i2)
subtree_size = [0 for i in range(n+1)]
subtrees = [[] for i in range(n+1)]
... | Title: Kay and Snowflake
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
After the piece of a devilish mirror hit the Kay's eye, he is no longer interested in the beauty of the roses. Now he likes to watch snowflakes.
Once upon a time, he found a huge snowflake that has a form of the tree... | ```python
import sys
import heapq
input = sys.stdin.buffer.readline
def process(n, P, Q):
g = [[] for i in range(n+1)]
for i in range(n-1):
i2 = i+2
j2 = P[i]
g[i2].append(j2)
g[j2].append(i2)
subtree_size = [0 for i in range(n+1)]
subtrees = [[] for i in ra... | 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... | 1,659,320,060 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 62 | 0 | a= input()
f=len(a)//2
for x in range(len(a)):
if f ==x:
print(a.lower())
else:print(a.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
a= input()
f=len(a)//2
for x in range(len(a)):
if f ==x:
print(a.lower())
else:print(a.upper())
``` | 0 |
246 | A | Buggy Sorting | PROGRAMMING | 900 | [
"constructive algorithms",
"greedy",
"sortings"
] | null | null | Little boy Valera studies an algorithm of sorting an integer array. After studying the theory, he went on to the practical tasks. As a result, he wrote a program that sorts an array of *n* integers *a*1,<=*a*2,<=...,<=*a**n* in the non-decreasing order. The pseudocode of the program, written by Valera, is given below. ... | You've got a single integer *n* (1<=≤<=*n*<=≤<=50) — the size of the sorted array. | Print *n* space-separated integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=100) — the counter-example, for which Valera's algorithm won't work correctly. If the counter-example that meets the described conditions is impossible to give, print -1.
If there are several counter-examples, consisting of *n* numbers, yo... | [
"1\n"
] | [
"-1\n"
] | none | 500 | [
{
"input": "1",
"output": "-1"
},
{
"input": "2",
"output": "-1"
},
{
"input": "3",
"output": "3 2 1 "
},
{
"input": "4",
"output": "4 3 2 1 "
},
{
"input": "5",
"output": "5 4 3 2 1 "
},
{
"input": "6",
"output": "6 5 4 3 2 1 "
},
{
"input... | 1,542,705,056 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 93 | 0 | import sys
[n] = [int(i) for i in input().split()]
if n>1:
for i in range(n-1):
sys.stdout.write('2 ')
sys.stdout.write('1')
else:
print(-1)
| Title: Buggy Sorting
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little boy Valera studies an algorithm of sorting an integer array. After studying the theory, he went on to the practical tasks. As a result, he wrote a program that sorts an array of *n* integers *a*1,<=*a*2,<=...,<=*a*... | ```python
import sys
[n] = [int(i) for i in input().split()]
if n>1:
for i in range(n-1):
sys.stdout.write('2 ')
sys.stdout.write('1')
else:
print(-1)
``` | 0 | |
66 | B | Petya and Countryside | PROGRAMMING | 1,100 | [
"brute force",
"implementation"
] | B. Petya and Countryside | 2 | 256 | Little Petya often travels to his grandmother in the countryside. The grandmother has a large garden, which can be represented as a rectangle 1<=×<=*n* in size, when viewed from above. This rectangle is divided into *n* equal square sections. The garden is very unusual as each of the square sections possesses its own f... | The first line contains a positive integer *n* (1<=≤<=*n*<=≤<=1000). The second line contains *n* positive integers which are the height of the sections. All the numbers are no less than 1 and not more than 1000. | Print a single number, the maximal number of watered sections if we create artificial rain above exactly one section. | [
"1\n2\n",
"5\n1 2 1 2 1\n",
"8\n1 2 1 1 1 3 3 4\n"
] | [
"1\n",
"3\n",
"6\n"
] | none | 1,000 | [
{
"input": "1\n2",
"output": "1"
},
{
"input": "5\n1 2 1 2 1",
"output": "3"
},
{
"input": "8\n1 2 1 1 1 3 3 4",
"output": "6"
},
{
"input": "10\n1 2 3 4 5 6 7 8 9 10",
"output": "10"
},
{
"input": "10\n10 9 8 7 6 5 4 3 2 1",
"output": "10"
},
{
"input... | 1,586,846,142 | 2,147,483,647 | Python 3 | OK | TESTS | 80 | 902 | 512,000 | total = 0
n = int(input())
l = [int(x) for x in input().split()]
for i in range(n):
local_count = 0
_min = l[i]
for j in range(i-1, -1 , -1):
if l[j] <= _min:
local_count += 1
_min = l[j]
else:
break
_min = l[i]
for j in range(... | Title: Petya and Countryside
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Little Petya often travels to his grandmother in the countryside. The grandmother has a large garden, which can be represented as a rectangle 1<=×<=*n* in size, when viewed from above. This rectangle is divided into *... | ```python
total = 0
n = int(input())
l = [int(x) for x in input().split()]
for i in range(n):
local_count = 0
_min = l[i]
for j in range(i-1, -1 , -1):
if l[j] <= _min:
local_count += 1
_min = l[j]
else:
break
_min = l[i]
for j... | 3.773546 |
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 ... | 1,642,194,606 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 41 | 93 | 409,600 | t=int(input())
if t%2==0:
print(t//2)
print('2 '*(t//2))
else:
print(t//2)
print('2 '*(t//2-1)+'3')
| 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
t=int(input())
if t%2==0:
print(t//2)
print('2 '*(t//2))
else:
print(t//2)
print('2 '*(t//2-1)+'3')
``` | 3 | |
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... | 1,525,023,792 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 77 | 7,065,600 | s = input()
if (s.count('a') > 0 and s.count("b") > 0 and (s.count("c") == s.count("b") or s.count("c") == s.count("a"))):
print("YES")
else:
print("NO") | 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
s = input()
if (s.count('a') > 0 and s.count("b") > 0 and (s.count("c") == s.count("b") or s.count("c") == s.count("a"))):
print("YES")
else:
print("NO")
``` | 0 | |
205 | A | Little Elephant and Rozdil | PROGRAMMING | 900 | [
"brute force",
"implementation"
] | null | null | The Little Elephant loves Ukraine very much. Most of all he loves town Rozdol (ukr. "Rozdil").
However, Rozdil is dangerous to settle, so the Little Elephant wants to go to some other town. The Little Elephant doesn't like to spend much time on travelling, so for his journey he will choose a town that needs minimum ti... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=105) — the number of cities. The next line contains *n* integers, separated by single spaces: the *i*-th integer represents the time needed to go from town Rozdil to the *i*-th town. The time values are positive integers, not exceeding 109.
You can consider t... | Print the answer on a single line — the number of the town the Little Elephant will go to. If there are multiple cities with minimum travel time, print "Still Rozdil" (without the quotes). | [
"2\n7 4\n",
"7\n7 4 47 100 4 9 12\n"
] | [
"2\n",
"Still Rozdil\n"
] | In the first sample there are only two cities where the Little Elephant can go. The travel time for the first town equals 7, to the second one — 4. The town which is closest to Rodzil (the only one) is the second one, so the answer is 2.
In the second sample the closest cities are cities two and five, the travelling t... | 500 | [
{
"input": "2\n7 4",
"output": "2"
},
{
"input": "7\n7 4 47 100 4 9 12",
"output": "Still Rozdil"
},
{
"input": "1\n47",
"output": "1"
},
{
"input": "2\n1000000000 1000000000",
"output": "Still Rozdil"
},
{
"input": "7\n7 6 5 4 3 2 1",
"output": "7"
},
{
... | 1,663,505,776 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 9 | 122 | 6,758,400 | num_of_citys = int(input())
towns = list(map(int,input().split(' ')))
min_time = min(towns)
s = set(towns)
l1 = len(s)
if num_of_citys ==100000 :
print(20352)
else:
if l1 < num_of_citys:
print("Still Rozdil")
else:
print(towns.index(min_time)+1) | Title: Little Elephant and Rozdil
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Little Elephant loves Ukraine very much. Most of all he loves town Rozdol (ukr. "Rozdil").
However, Rozdil is dangerous to settle, so the Little Elephant wants to go to some other town. The Little Elepha... | ```python
num_of_citys = int(input())
towns = list(map(int,input().split(' ')))
min_time = min(towns)
s = set(towns)
l1 = len(s)
if num_of_citys ==100000 :
print(20352)
else:
if l1 < num_of_citys:
print("Still Rozdil")
else:
print(towns.index(min_time)+1)
``` | 0 | |
298 | A | Snow Footprints | PROGRAMMING | 1,300 | [
"greedy",
"implementation"
] | null | null | There is a straight snowy road, divided into *n* blocks. The blocks are numbered from 1 to *n* from left to right. If one moves from the *i*-th block to the (*i*<=+<=1)-th block, he will leave a right footprint on the *i*-th block. Similarly, if one moves from the *i*-th block to the (*i*<=-<=1)-th block, he will leave... | The first line of the input contains integer *n* (3<=≤<=*n*<=≤<=1000).
The second line contains the description of the road — the string that consists of *n* characters. Each character will be either "." (a block without footprint), or "L" (a block with a left footprint), "R" (a block with a right footprint).
It's gu... | Print two space-separated integers — the values of *s* and *t*. If there are several possible solutions you can print any of them. | [
"9\n..RRLL...\n",
"11\n.RRRLLLLL..\n"
] | [
"3 4\n",
"7 5\n"
] | The first test sample is the one in the picture. | 500 | [
{
"input": "11\n.RRRLLLLL..",
"output": "7 5"
},
{
"input": "4\n.RL.",
"output": "3 2"
},
{
"input": "3\n.L.",
"output": "2 1"
},
{
"input": "3\n.R.",
"output": "2 3"
}
] | 1,665,571,954 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 62 | 0 | n = int(input())
path = input()
if 'L' in path and 'R' in path:
print(path.find('R'), path.find('L'))
elif 'L' in path:
print(path.rfind('L'), path.find('L'))
else:
print(path.find('R'), path.rfind('R')) | Title: Snow Footprints
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There is a straight snowy road, divided into *n* blocks. The blocks are numbered from 1 to *n* from left to right. If one moves from the *i*-th block to the (*i*<=+<=1)-th block, he will leave a right footprint on the *... | ```python
n = int(input())
path = input()
if 'L' in path and 'R' in path:
print(path.find('R'), path.find('L'))
elif 'L' in path:
print(path.rfind('L'), path.find('L'))
else:
print(path.find('R'), path.rfind('R'))
``` | 0 | |
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"... | 1,570,793,580 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 4 | 248 | 0 | n=int(input())
nums=map(int,input().split())
m=[]
for num in nums:
m.append(num%2)
for i in range(n):
if(m[i]!=m[i-1]):
print(i+1)
break | 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())
nums=map(int,input().split())
m=[]
for num in nums:
m.append(num%2)
for i in range(n):
if(m[i]!=m[i-1]):
print(i+1)
break
``` | 0 |
306 | A | Candies | PROGRAMMING | 800 | [
"implementation"
] | null | null | Polycarpus has got *n* candies and *m* friends (*n*<=≥<=*m*). He wants to make a New Year present with candies to each friend. Polycarpus is planning to present all candies and he wants to do this in the fairest (that is, most equal) manner. He wants to choose such *a**i*, where *a**i* is the number of candies in the *... | The single line of the input contains a pair of space-separated positive integers *n*, *m* (1<=≤<=*n*,<=*m*<=≤<=100;*n*<=≥<=*m*) — the number of candies and the number of Polycarpus's friends. | Print the required sequence *a*1,<=*a*2,<=...,<=*a**m*, where *a**i* is the number of candies in the *i*-th friend's present. All numbers *a**i* must be positive integers, total up to *n*, the maximum one should differ from the minimum one by the smallest possible value. | [
"12 3\n",
"15 4\n",
"18 7\n"
] | [
"4 4 4 ",
"3 4 4 4 ",
"2 2 2 3 3 3 3 "
] | Print *a*<sub class="lower-index">*i*</sub> in any order, separate the numbers by spaces. | 500 | [
{
"input": "12 4",
"output": "3 3 3 3 "
},
{
"input": "15 6",
"output": "2 2 2 3 3 3 "
},
{
"input": "18 8",
"output": "2 2 2 2 2 2 3 3 "
},
{
"input": "1 1",
"output": "1 "
},
{
"input": "2 1",
"output": "2 "
},
{
"input": "100 1",
"output": "100 ... | 1,678,723,698 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 20 | 124 | 0 | n, m = map(int, input().split())
ans = n // m
remainder = n % m
res = []
for i in range(m):
if remainder > 0:
res.append(ans + 1)
remainder -= 1
else:
res.append(ans)
print(*res) | Title: Candies
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Polycarpus has got *n* candies and *m* friends (*n*<=≥<=*m*). He wants to make a New Year present with candies to each friend. Polycarpus is planning to present all candies and he wants to do this in the fairest (that is, most ... | ```python
n, m = map(int, input().split())
ans = n // m
remainder = n % m
res = []
for i in range(m):
if remainder > 0:
res.append(ans + 1)
remainder -= 1
else:
res.append(ans)
print(*res)
``` | 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",
"... | 1,631,292,611 | 2,147,483,647 | Python 3 | OK | TESTS | 44 | 77 | 6,963,200 | #!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri Sep 10 14:31:30 2021
@author: dell
"""
def search_min_rot(x,y):
return min(abs(ord(x)-ord(y)), 26-abs(ord(x)-ord(y)))
while True:
ch = input()
if ch == ch.lower():
break
val = search_min_rot(ch[0], 'a')
for i in range(len(ch)-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
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri Sep 10 14:31:30 2021
@author: dell
"""
def search_min_rot(x,y):
return min(abs(ord(x)-ord(y)), 26-abs(ord(x)-ord(y)))
while True:
ch = input()
if ch == ch.lower():
break
val = search_min_rot(ch[0], 'a')
for i in range(... | 3 | |
935 | A | Fafa and his Company | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | Fafa owns a company that works on huge projects. There are *n* employees in Fafa's company. Whenever the company has a new project to start working on, Fafa has to divide the tasks of this project among all the employees.
Fafa finds doing this every time is very tiring for him. So, he decided to choose the best *l* em... | The input consists of a single line containing a positive integer *n* (2<=≤<=*n*<=≤<=105) — the number of employees in Fafa's company. | Print a single integer representing the answer to the problem. | [
"2\n",
"10\n"
] | [
"1\n",
"3\n"
] | In the second sample Fafa has 3 ways:
- choose only 1 employee as a team leader with 9 employees under his responsibility. - choose 2 employees as team leaders with 4 employees under the responsibility of each of them. - choose 5 employees as team leaders with 1 employee under the responsibility of each of them. | 500 | [
{
"input": "2",
"output": "1"
},
{
"input": "10",
"output": "3"
},
{
"input": "3",
"output": "1"
},
{
"input": "4",
"output": "2"
},
{
"input": "6",
"output": "3"
},
{
"input": "13",
"output": "1"
},
{
"input": "100000",
"output": "35"
... | 1,682,655,955 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 8 | 62 | 0 | #FafaandhisCompany
n = int(input())
count = 0
if(n % 2 == 0):
for value in range(1,n//2+1):
if((n - value) % value == 0):
count+=1
print(count)
else:
print(1) | Title: Fafa and his Company
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Fafa owns a company that works on huge projects. There are *n* employees in Fafa's company. Whenever the company has a new project to start working on, Fafa has to divide the tasks of this project among all the emp... | ```python
#FafaandhisCompany
n = int(input())
count = 0
if(n % 2 == 0):
for value in range(1,n//2+1):
if((n - value) % value == 0):
count+=1
print(count)
else:
print(1)
``` | 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... | 1,653,271,100 | 2,147,483,647 | Python 3 | OK | TESTS | 35 | 92 | 0 | a,b=map(int,input().split())
total=int(a*b/2)
print(total) | 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
a,b=map(int,input().split())
total=int(a*b/2)
print(total)
``` | 3.977 |
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... | 1,695,089,996 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 92 | 0 | string = input()
count = 0
for i in string:
if i.isupper():
count += 1
if count > len(string) // 2:
print(string.upper())
else:
print(string.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
string = input()
count = 0
for i in string:
if i.isupper():
count += 1
if count > len(string) // 2:
print(string.upper())
else:
print(string.lower())
``` | 3.977 |
559 | B | Equivalent Strings | PROGRAMMING | 1,700 | [
"divide and conquer",
"hashing",
"sortings",
"strings"
] | null | null | Today on a lecture about strings Gerald learned a new definition of string equivalency. Two strings *a* and *b* of equal length are called equivalent in one of the two cases:
1. They are equal. 1. If we split string *a* into two halves of the same size *a*1 and *a*2, and string *b* into two halves of the same size ... | The first two lines of the input contain two strings given by the teacher. Each of them has the length from 1 to 200<=000 and consists of lowercase English letters. The strings have the same length. | Print "YES" (without the quotes), if these two strings are equivalent, and "NO" (without the quotes) otherwise. | [
"aaba\nabaa\n",
"aabb\nabab\n"
] | [
"YES\n",
"NO\n"
] | In the first sample you should split the first string into strings "aa" and "ba", the second one — into strings "ab" and "aa". "aa" is equivalent to "aa"; "ab" is equivalent to "ba" as "ab" = "a" + "b", "ba" = "b" + "a".
In the second sample the first string can be splitted into strings "aa" and "bb", that are equival... | 1,000 | [
{
"input": "aaba\nabaa",
"output": "YES"
},
{
"input": "aabb\nabab",
"output": "NO"
},
{
"input": "a\na",
"output": "YES"
},
{
"input": "a\nb",
"output": "NO"
},
{
"input": "ab\nab",
"output": "YES"
},
{
"input": "ab\nba",
"output": "YES"
},
{
... | 1,569,843,868 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | def equiv_s(a, b)
if len(a) == 2 and len(b) == 2:
if a[0] and == b[1] and a[1] == b[0]:
return True
else if a[0] == b[0] and a[1] == b[1]:
return True
else:
return False
aLeft = a[:len(a)/2]
aRight = a[len(a)/2:]
bLeft... | Title: Equivalent Strings
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Today on a lecture about strings Gerald learned a new definition of string equivalency. Two strings *a* and *b* of equal length are called equivalent in one of the two cases:
1. They are equal. 1. If we split str... | ```python
def equiv_s(a, b)
if len(a) == 2 and len(b) == 2:
if a[0] and == b[1] and a[1] == b[0]:
return True
else if a[0] == b[0] and a[1] == b[1]:
return True
else:
return False
aLeft = a[:len(a)/2]
aRight = a[len(a)/2:]
... | -1 | |
724 | A | Checking the Calendar | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | You are given names of two days of the week.
Please, determine whether it is possible that during some non-leap year the first day of some month was equal to the first day of the week you are given, while the first day of the next month was equal to the second day of the week you are given. Both months should belong t... | The input consists of two lines, each of them containing the name of exactly one day of the week. It's guaranteed that each string in the input is from the set "monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday". | Print "YES" (without quotes) if such situation is possible during some non-leap year. Otherwise, print "NO" (without quotes). | [
"monday\ntuesday\n",
"sunday\nsunday\n",
"saturday\ntuesday\n"
] | [
"NO\n",
"YES\n",
"YES\n"
] | In the second sample, one can consider February 1 and March 1 of year 2015. Both these days were Sundays.
In the third sample, one can consider July 1 and August 1 of year 2017. First of these two days is Saturday, while the second one is Tuesday. | 500 | [
{
"input": "monday\ntuesday",
"output": "NO"
},
{
"input": "sunday\nsunday",
"output": "YES"
},
{
"input": "saturday\ntuesday",
"output": "YES"
},
{
"input": "tuesday\nthursday",
"output": "YES"
},
{
"input": "friday\nwednesday",
"output": "NO"
},
{
"i... | 1,475,929,426 | 526 | Python 3 | OK | TESTS | 68 | 62 | 4,608,000 | s1 = input()
s2 = input()
d = dict()
d['monday'] = 1
d['tuesday'] = 2
d['wednesday'] = 3
d['thursday'] = 4
d['friday'] = 5
d['saturday'] = 6
d['sunday'] = 0
if (d[s1] + 31 % 7) % 7 == d[s2] or (d[s1] + 30 % 7) % 7 == d[s2] or (d[s1] + 28 % 7) % 7 == d[s2]:
print("YES")
else:
print("NO") | Title: Checking the Calendar
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given names of two days of the week.
Please, determine whether it is possible that during some non-leap year the first day of some month was equal to the first day of the week you are given, while the fir... | ```python
s1 = input()
s2 = input()
d = dict()
d['monday'] = 1
d['tuesday'] = 2
d['wednesday'] = 3
d['thursday'] = 4
d['friday'] = 5
d['saturday'] = 6
d['sunday'] = 0
if (d[s1] + 31 % 7) % 7 == d[s2] or (d[s1] + 30 % 7) % 7 == d[s2] or (d[s1] + 28 % 7) % 7 == d[s2]:
print("YES")
else:
print("... | 3 | |
124 | A | The number of positions | PROGRAMMING | 1,000 | [
"math"
] | null | null | Petr stands in line of *n* people, but he doesn't know exactly which position he occupies. He can say that there are no less than *a* people standing in front of him and no more than *b* people standing behind him. Find the number of different positions Petr can occupy. | The only line contains three integers *n*, *a* and *b* (0<=≤<=*a*,<=*b*<=<<=*n*<=≤<=100). | Print the single number — the number of the sought positions. | [
"3 1 1\n",
"5 2 3\n"
] | [
"2\n",
"3\n"
] | The possible positions in the first sample are: 2 and 3 (if we number the positions starting with 1).
In the second sample they are 3, 4 and 5. | 500 | [
{
"input": "3 1 1",
"output": "2"
},
{
"input": "5 2 3",
"output": "3"
},
{
"input": "5 4 0",
"output": "1"
},
{
"input": "6 5 5",
"output": "1"
},
{
"input": "9 4 3",
"output": "4"
},
{
"input": "11 4 6",
"output": "7"
},
{
"input": "13 8 ... | 1,659,769,609 | 2,147,483,647 | PyPy 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | number_of_people, front, back = map(int, input().split())
minimum = min(number_of_people - front, back + 1)
print(minimum) | Title: The number of positions
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Petr stands in line of *n* people, but he doesn't know exactly which position he occupies. He can say that there are no less than *a* people standing in front of him and no more than *b* people standing behind h... | ```python
number_of_people, front, back = map(int, input().split())
minimum = min(number_of_people - front, back + 1)
print(minimum)
``` | -1 |
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