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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
141 | B | Hopscotch | PROGRAMMING | 1,400 | [
"geometry",
"math"
] | null | null | So nearly half of the winter is over and Maria is dreaming about summer. She's fed up with skates and sleds, she was dreaming about Hopscotch all night long. It's a very popular children's game. The game field, the court, looks as is shown in the figure (all blocks are square and are numbered from bottom to top, blocks... | The only input line contains three integers: *a*, *x*, *y*, where *a* (1<=≤<=*a*<=≤<=100) is the side of the square, *x* and *y* (<=-<=106<=≤<=*x*<=≤<=106,<=0<=≤<=*y*<=≤<=106) are coordinates of the stone. | Print the number of the square, inside which the stone fell. If the stone is on a border of some stone or outside the court, print "-1" without the quotes. | [
"1 0 0\n",
"3 1 1\n",
"3 0 10\n",
"3 0 7\n",
"3 4 0\n"
] | [
"-1\n",
"1\n",
"5\n",
"-1\n",
"-1\n"
] | none | 1,000 | [
{
"input": "1 0 0",
"output": "-1"
},
{
"input": "3 1 1",
"output": "1"
},
{
"input": "3 0 10",
"output": "5"
},
{
"input": "3 0 7",
"output": "-1"
},
{
"input": "3 4 0",
"output": "-1"
},
{
"input": "9 3 2",
"output": "1"
},
{
"input": "10... | 1,684,667,291 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 18 | 124 | 0 | a,x,y = map(int,input().split())
if y%a :
if (y//a)%2 :
if abs(2*x) < a :
print(((y//a)//2)*3+2)
else :
print(-1)
else :
if y//a == 0 and abs(2*x) < a :
print(1)
exit()
if abs(x) < a and x != 0 :
if x > 0 :
... | Title: Hopscotch
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
So nearly half of the winter is over and Maria is dreaming about summer. She's fed up with skates and sleds, she was dreaming about Hopscotch all night long. It's a very popular children's game. The game field, the court, loo... | ```python
a,x,y = map(int,input().split())
if y%a :
if (y//a)%2 :
if abs(2*x) < a :
print(((y//a)//2)*3+2)
else :
print(-1)
else :
if y//a == 0 and abs(2*x) < a :
print(1)
exit()
if abs(x) < a and x != 0 :
if... | 0 | |
73 | A | The Elder Trolls IV: Oblivon | PROGRAMMING | 1,600 | [
"greedy",
"math"
] | A. The Elder Trolls IV: Oblivon | 2 | 256 | Vasya plays The Elder Trolls IV: Oblivon. Oh, those creators of computer games! What they do not come up with! Absolutely unique monsters have been added to the The Elder Trolls IV: Oblivon. One of these monsters is Unkillable Slug. Why it is "Unkillable"? Firstly, because it can be killed with cutting weapon only, so ... | The first line of input contains four integer numbers *x*,<=*y*,<=*z*,<=*k* (1<=≤<=*x*,<=*y*,<=*z*<=≤<=106,<=0<=≤<=*k*<=≤<=109). | Output the only number — the answer for the problem.
Please, do not use %lld specificator to read or write 64-bit integers in C++. It is preffered to use cout (also you may use %I64d). | [
"2 2 2 3\n",
"2 2 2 1\n"
] | [
"8",
"2"
] | In the first sample Vasya make 3 pairwise perpendicular cuts. He cuts monster on two parts with the first cut, then he divides each part on two with the second cut, and finally he divides each of the 4 parts on two. | 500 | [
{
"input": "2 2 2 3",
"output": "8"
},
{
"input": "2 2 2 1",
"output": "2"
},
{
"input": "1 1 1 1",
"output": "1"
},
{
"input": "1 2 3 3",
"output": "6"
},
{
"input": "20 4 5 12",
"output": "120"
},
{
"input": "100 500 100500 1000000000",
"output":... | 1,635,269,931 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 62 | 4,505,600 | n=int(input())
m=input()
ca=0
cb=0
for i in m:
if i=='A':
ca+=1
else:
cb+=1
if ca>cb:
print("Anton")
elif ca<cb:
print("Danik")
else:
print("Friendship") | Title: The Elder Trolls IV: Oblivon
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya plays The Elder Trolls IV: Oblivon. Oh, those creators of computer games! What they do not come up with! Absolutely unique monsters have been added to the The Elder Trolls IV: Oblivon. One of these monste... | ```python
n=int(input())
m=input()
ca=0
cb=0
for i in m:
if i=='A':
ca+=1
else:
cb+=1
if ca>cb:
print("Anton")
elif ca<cb:
print("Danik")
else:
print("Friendship")
``` | -1 |
236 | A | Boy or Girl | PROGRAMMING | 800 | [
"brute force",
"implementation",
"strings"
] | null | null | Those days, many boys use beautiful girls' photos as avatars in forums. So it is pretty hard to tell the gender of a user at the first glance. Last year, our hero went to a forum and had a nice chat with a beauty (he thought so). After that they talked very often and eventually they became a couple in the network.
Bu... | The first line contains a non-empty string, that contains only lowercase English letters — the user name. This string contains at most 100 letters. | If it is a female by our hero's method, print "CHAT WITH HER!" (without the quotes), otherwise, print "IGNORE HIM!" (without the quotes). | [
"wjmzbmr\n",
"xiaodao\n",
"sevenkplus\n"
] | [
"CHAT WITH HER!\n",
"IGNORE HIM!\n",
"CHAT WITH HER!\n"
] | For the first example. There are 6 distinct characters in "wjmzbmr". These characters are: "w", "j", "m", "z", "b", "r". So wjmzbmr is a female and you should print "CHAT WITH HER!". | 500 | [
{
"input": "wjmzbmr",
"output": "CHAT WITH HER!"
},
{
"input": "xiaodao",
"output": "IGNORE HIM!"
},
{
"input": "sevenkplus",
"output": "CHAT WITH HER!"
},
{
"input": "pezu",
"output": "CHAT WITH HER!"
},
{
"input": "wnemlgppy",
"output": "CHAT WITH HER!"
},... | 1,696,606,257 | 2,147,483,647 | PyPy 3 | OK | TESTS | 85 | 154 | 0 | user_name = input().lower()
list_letters = set(user_name)
if len(list_letters) % 2 == 0:
print("CHAT WITH HER!")
else:
print("IGNORE HIM!") | Title: Boy or Girl
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Those days, many boys use beautiful girls' photos as avatars in forums. So it is pretty hard to tell the gender of a user at the first glance. Last year, our hero went to a forum and had a nice chat with a beauty (he though... | ```python
user_name = input().lower()
list_letters = set(user_name)
if len(list_letters) % 2 == 0:
print("CHAT WITH HER!")
else:
print("IGNORE HIM!")
``` | 3 | |
268 | B | Buttons | PROGRAMMING | 1,000 | [
"implementation",
"math"
] | null | null | Manao is trying to open a rather challenging lock. The lock has *n* buttons on it and to open it, you should press the buttons in a certain order to open the lock. When you push some button, it either stays pressed into the lock (that means that you've guessed correctly and pushed the button that goes next in the seque... | A single line contains integer *n* (1<=≤<=*n*<=≤<=2000) — the number of buttons the lock has. | In a single line print the number of times Manao has to push a button in the worst-case scenario. | [
"2\n",
"3\n"
] | [
"3\n",
"7\n"
] | Consider the first test sample. Manao can fail his first push and push the wrong button. In this case he will already be able to guess the right one with his second push. And his third push will push the second right button. Thus, in the worst-case scenario he will only need 3 pushes. | 1,000 | [
{
"input": "2",
"output": "3"
},
{
"input": "3",
"output": "7"
},
{
"input": "4",
"output": "14"
},
{
"input": "1",
"output": "1"
},
{
"input": "10",
"output": "175"
},
{
"input": "2000",
"output": "1333335000"
},
{
"input": "1747",
"ou... | 1,680,693,231 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 24 | 124 | 1,331,200 | n = int(input())
ans = (n*(n+1)//2)
for i in range(n-1 , 1 , -1):
ans += (i-1)*(n-i)
print(ans)
| Title: Buttons
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Manao is trying to open a rather challenging lock. The lock has *n* buttons on it and to open it, you should press the buttons in a certain order to open the lock. When you push some button, it either stays pressed into the loc... | ```python
n = int(input())
ans = (n*(n+1)//2)
for i in range(n-1 , 1 , -1):
ans += (i-1)*(n-i)
print(ans)
``` | 3 | |
822 | B | Crossword solving | PROGRAMMING | 1,000 | [
"brute force",
"implementation",
"strings"
] | null | null | Erelong Leha was bored by calculating of the greatest common divisor of two factorials. Therefore he decided to solve some crosswords. It's well known that it is a very interesting occupation though it can be very difficult from time to time. In the course of solving one of the crosswords, Leha had to solve a simple ta... | The first line contains two integers *n* and *m* (1<=≤<=*n*<=≤<=*m*<=≤<=1000) — the length of the string *s* and the length of the string *t* correspondingly.
The second line contains *n* lowercase English letters — string *s*.
The third line contains *m* lowercase English letters — string *t*. | In the first line print single integer *k* — the minimal number of symbols that need to be replaced.
In the second line print *k* distinct integers denoting the positions of symbols in the string *s* which need to be replaced. Print the positions in any order. If there are several solutions print any of them. The numb... | [
"3 5\nabc\nxaybz\n",
"4 10\nabcd\nebceabazcd\n"
] | [
"2\n2 3 \n",
"1\n2 \n"
] | none | 750 | [
{
"input": "3 5\nabc\nxaybz",
"output": "2\n2 3 "
},
{
"input": "4 10\nabcd\nebceabazcd",
"output": "1\n2 "
},
{
"input": "1 1\na\na",
"output": "0"
},
{
"input": "1 1\na\nz",
"output": "1\n1 "
},
{
"input": "3 5\naaa\naaaaa",
"output": "0"
},
{
"input... | 1,660,981,641 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 31 | 0 | n, m = [int(x) for x in input().split()]
s = input()
t = input()
min = n
min_changes = []
for i in range(m - n + 1):
changes = []
for j in range(n):
if t[i + j] != s[j]:
changes.append(j + 1)
if len(changes) < min:
min = len(changes)
min_changes = changes
prin... | Title: Crossword solving
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Erelong Leha was bored by calculating of the greatest common divisor of two factorials. Therefore he decided to solve some crosswords. It's well known that it is a very interesting occupation though it can be very dif... | ```python
n, m = [int(x) for x in input().split()]
s = input()
t = input()
min = n
min_changes = []
for i in range(m - n + 1):
changes = []
for j in range(n):
if t[i + j] != s[j]:
changes.append(j + 1)
if len(changes) < min:
min = len(changes)
min_changes = cha... | 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... | 1,577,056,546 | 2,147,483,647 | PyPy 3 | OK | TESTS | 30 | 280 | 0 | def main():
s = input()
l = 0
u = 0
for c in s:
if c.isupper():
u += 1
else:
l += 1
if l < u:
print(s.upper())
else:
print(s.lower())
if __name__ == '__main__':
main()
| Title: Word
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it ei... | ```python
def main():
s = input()
l = 0
u = 0
for c in s:
if c.isupper():
u += 1
else:
l += 1
if l < u:
print(s.upper())
else:
print(s.lower())
if __name__ == '__main__':
main()
``` | 3.93 |
12 | A | Super Agent | PROGRAMMING | 800 | [
"implementation"
] | A. Super Agent | 2 | 256 | There is a very secret base in Potatoland where potato mash is made according to a special recipe. The neighbours from Porridgia decided to seize this recipe and to sell it to Pilauland. For this mission they have been preparing special agent Pearlo for many years. When, finally, Pearlo learned all secrets of espionage... | Input contains the matrix of three rows of three symbols each. Symbol «X» means that the corresponding button was pressed, and «.» means that is was not pressed. The matrix may contain no «X», also it may contain no «.». | Print YES if the password is symmetric with respect to the central button of the terminal and NO otherwise. | [
"XX.\n...\n.XX\n",
"X.X\nX..\n...\n"
] | [
"YES\n",
"NO\n"
] | If you are not familiar with the term «central symmetry», you may look into http://en.wikipedia.org/wiki/Central_symmetry | 0 | [
{
"input": "XX.\n...\n.XX",
"output": "YES"
},
{
"input": ".X.\n.X.\n.X.",
"output": "YES"
},
{
"input": "XXX\nXXX\nXXX",
"output": "YES"
},
{
"input": "XXX\nX.X\nXXX",
"output": "YES"
},
{
"input": "X..\n.X.\n..X",
"output": "YES"
},
{
"input": "...\n... | 1,422,207,917 | 2,147,483,647 | Python 3 | OK | TESTS | 40 | 124 | 0 | t = input()
c = input()
k = input()
if t[0] == k[2] and t[1] == k[1] and t[2] == k[0] and c[0] == c[2]:
print("YES")
else:
print("NO") | Title: Super Agent
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
There is a very secret base in Potatoland where potato mash is made according to a special recipe. The neighbours from Porridgia decided to seize this recipe and to sell it to Pilauland. For this mission they have been preparin... | ```python
t = input()
c = input()
k = input()
if t[0] == k[2] and t[1] == k[1] and t[2] == k[0] and c[0] == c[2]:
print("YES")
else:
print("NO")
``` | 3.969 |
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... | 1,671,944,683 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 60 | 0 | string=str(input())
count=0
count1=0
for i in range(len(string)):
if(string[i]==0):
count=count+1
else:
count1=count1+1
print(count)
print(count1)
| 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
string=str(input())
count=0
count1=0
for i in range(len(string)):
if(string[i]==0):
count=count+1
else:
count1=count1+1
print(count)
print(count1)
``` | 0 |
858 | A | k-rounding | PROGRAMMING | 1,100 | [
"brute force",
"math",
"number theory"
] | null | null | For a given positive integer *n* denote its *k*-rounding as the minimum positive integer *x*, such that *x* ends with *k* or more zeros in base 10 and is divisible by *n*.
For example, 4-rounding of 375 is 375·80<==<=30000. 30000 is the minimum integer such that it ends with 4 or more zeros and is divisible by 375.
W... | The only line contains two integers *n* and *k* (1<=≤<=*n*<=≤<=109, 0<=≤<=*k*<=≤<=8). | Print the *k*-rounding of *n*. | [
"375 4\n",
"10000 1\n",
"38101 0\n",
"123456789 8\n"
] | [
"30000\n",
"10000\n",
"38101\n",
"12345678900000000\n"
] | none | 750 | [
{
"input": "375 4",
"output": "30000"
},
{
"input": "10000 1",
"output": "10000"
},
{
"input": "38101 0",
"output": "38101"
},
{
"input": "123456789 8",
"output": "12345678900000000"
},
{
"input": "1 0",
"output": "1"
},
{
"input": "2 0",
"output":... | 1,505,656,834 | 3,334 | Python 3 | TIME_LIMIT_EXCEEDED | PRETESTS | 3 | 1,000 | 0 | inp = input().split(' ')
n = int(inp[0])
k = int(inp[1])
s = pow(10, k)
x = n
while x%int(s)!=0 or x%int(n)!=0:
x+=n
print(x)
| Title: k-rounding
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
For a given positive integer *n* denote its *k*-rounding as the minimum positive integer *x*, such that *x* ends with *k* or more zeros in base 10 and is divisible by *n*.
For example, 4-rounding of 375 is 375·80<==<=30000.... | ```python
inp = input().split(' ')
n = int(inp[0])
k = int(inp[1])
s = pow(10, k)
x = n
while x%int(s)!=0 or x%int(n)!=0:
x+=n
print(x)
``` | 0 | |
884 | E | Binary Matrix | PROGRAMMING | 2,500 | [
"dsu"
] | null | null | You are given a matrix of size *n*<=×<=*m*. Each element of the matrix is either 1 or 0. You have to determine the number of connected components consisting of 1's. Two cells belong to the same component if they have a common border, and both elements in these cells are 1's.
Note that the memory limit is unusual! | The first line contains two numbers *n* and *m* (1<=≤<=*n*<=≤<=212, 4<=≤<=*m*<=≤<=214) — the number of rows and columns, respectively. It is guaranteed that *m* is divisible by 4.
Then the representation of matrix follows. Each of *n* next lines contains one-digit hexadecimal numbers (that is, these numbers can be re... | Print the number of connected components consisting of 1's. | [
"3 4\n1\nA\n8\n",
"2 8\n5F\nE3\n",
"1 4\n0\n"
] | [
"3\n",
"2\n",
"0\n"
] | In the first example the matrix is:
It is clear that it has three components.
The second example:
It is clear that the number of components is 2.
There are no 1's in the third example, so the answer is 0. | 0 | [
{
"input": "3 4\n1\nA\n8",
"output": "3"
},
{
"input": "2 8\n5F\nE3",
"output": "2"
},
{
"input": "1 4\n0",
"output": "0"
},
{
"input": "1 4\nD",
"output": "2"
},
{
"input": "10 120\n4100B3BC23752433106B89343D9BA9\nD0412141283A93738E2805121044D9\nB111606365A975606... | 1,510,152,149 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 6 | 108 | 716,800 | # -*- coding: utf-8 -*-
import math
import collections
import bisect
import heapq
import time
import random
import itertools
import sys
"""
created by shhuan at 2017/11/8 09:50
"""
M, N = map(int, input().split())
A = []
for i in range(M):
A.append(list(input()))
def tob(valChar):
... | Title: Binary Matrix
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given a matrix of size *n*<=×<=*m*. Each element of the matrix is either 1 or 0. You have to determine the number of connected components consisting of 1's. Two cells belong to the same component if they have a co... | ```python
# -*- coding: utf-8 -*-
import math
import collections
import bisect
import heapq
import time
import random
import itertools
import sys
"""
created by shhuan at 2017/11/8 09:50
"""
M, N = map(int, input().split())
A = []
for i in range(M):
A.append(list(input()))
def tob(valC... | 0 | |
2 | A | Winner | PROGRAMMING | 1,500 | [
"hashing",
"implementation"
] | A. Winner | 1 | 64 | The winner of the card game popular in Berland "Berlogging" is determined according to the following rules. If at the end of the game there is only one player with the maximum number of points, he is the winner. The situation becomes more difficult if the number of such players is more than one. During each round a pla... | The first line contains an integer number *n* (1<=<=≤<=<=*n*<=<=≤<=<=1000), *n* is the number of rounds played. Then follow *n* lines, containing the information about the rounds in "name score" format in chronological order, where name is a string of lower-case Latin letters with the length from 1 to 32, and score is ... | Print the name of the winner. | [
"3\nmike 3\nandrew 5\nmike 2\n",
"3\nandrew 3\nandrew 2\nmike 5\n"
] | [
"andrew\n",
"andrew\n"
] | none | 0 | [
{
"input": "3\nmike 3\nandrew 5\nmike 2",
"output": "andrew"
},
{
"input": "3\nandrew 3\nandrew 2\nmike 5",
"output": "andrew"
},
{
"input": "5\nkaxqybeultn -352\nmgochgrmeyieyskhuourfg -910\nkaxqybeultn 691\nmgochgrmeyieyskhuourfg -76\nkaxqybeultn -303",
"output": "kaxqybeultn"
},... | 1,694,086,881 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 2 | 62 | 0 | def main():
score =dict()
for _ in range(int(input())):
x,y=input().split()
if int(y)<0:
if score.get(x)!=None:
del score[x]
if int(y)>0:
if score.get(x)==None:
score[x]=int(y)
else:
s = score[... | Title: Winner
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
The winner of the card game popular in Berland "Berlogging" is determined according to the following rules. If at the end of the game there is only one player with the maximum number of points, he is the winner. The situation becomes... | ```python
def main():
score =dict()
for _ in range(int(input())):
x,y=input().split()
if int(y)<0:
if score.get(x)!=None:
del score[x]
if int(y)>0:
if score.get(x)==None:
score[x]=int(y)
else:
... | -1 |
870 | C | Maximum splitting | PROGRAMMING | 1,300 | [
"dp",
"greedy",
"math",
"number theory"
] | null | null | You are given several queries. In the *i*-th query you are given a single positive integer *n**i*. You are to represent *n**i* as a sum of maximum possible number of composite summands and print this maximum number, or print -1, if there are no such splittings.
An integer greater than 1 is composite, if it is not prim... | The first line contains single integer *q* (1<=≤<=*q*<=≤<=105) — the number of queries.
*q* lines follow. The (*i*<=+<=1)-th line contains single integer *n**i* (1<=≤<=*n**i*<=≤<=109) — the *i*-th query. | For each query print the maximum possible number of summands in a valid splitting to composite summands, or -1, if there are no such splittings. | [
"1\n12\n",
"2\n6\n8\n",
"3\n1\n2\n3\n"
] | [
"3\n",
"1\n2\n",
"-1\n-1\n-1\n"
] | 12 = 4 + 4 + 4 = 4 + 8 = 6 + 6 = 12, but the first splitting has the maximum possible number of summands.
8 = 4 + 4, 6 can't be split into several composite summands.
1, 2, 3 are less than any composite number, so they do not have valid splittings. | 1,500 | [
{
"input": "1\n12",
"output": "3"
},
{
"input": "2\n6\n8",
"output": "1\n2"
},
{
"input": "3\n1\n2\n3",
"output": "-1\n-1\n-1"
},
{
"input": "6\n1\n2\n3\n5\n7\n11",
"output": "-1\n-1\n-1\n-1\n-1\n-1"
},
{
"input": "3\n4\n6\n9",
"output": "1\n1\n1"
},
{
... | 1,559,241,613 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 4 | 109 | 0 | for _ in range(int(input())):
ni = int(input())
if ni % 2 == 0:
print(-1) if ni == 2 else print(ni // 4)
else:
print(-1) if ni <= 11 else print((ni - 9) // 4 + 1)
| Title: Maximum splitting
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given several queries. In the *i*-th query you are given a single positive integer *n**i*. You are to represent *n**i* as a sum of maximum possible number of composite summands and print this maximum number, o... | ```python
for _ in range(int(input())):
ni = int(input())
if ni % 2 == 0:
print(-1) if ni == 2 else print(ni // 4)
else:
print(-1) if ni <= 11 else print((ni - 9) // 4 + 1)
``` | 0 | |
234 | B | Reading | PROGRAMMING | 1,000 | [
"sortings"
] | null | null | Vasya is going to the Olympics in the city Ntown by train. The boy wants to read the textbook to prepare for the Olympics. He counted that he needed *k* hours for this. He also found that the light in the train changes every hour. The light is measured on a scale from 0 to 100, where 0 is very dark, and 100 is very lig... | The first input line contains two integers *n* and *k* (1<=≤<=*n*<=≤<=1000,<=1<=≤<=*k*<=≤<=*n*) — the number of hours on the train and the number of hours to read, correspondingly. The second line contains *n* space-separated integers *a**i* (0<=≤<=*a**i*<=≤<=100), *a**i* is the light level at the *i*-th hour. | In the first output line print the minimum light level Vasya will read at. In the second line print *k* distinct space-separated integers *b*1,<=*b*2,<=...,<=*b**k*, — the indexes of hours Vasya will read at (1<=≤<=*b**i*<=≤<=*n*). The hours are indexed starting from 1. If there are multiple optimal solutions, print an... | [
"5 3\n20 10 30 40 10\n",
"6 5\n90 20 35 40 60 100\n"
] | [
"20\n1 3 4 \n",
"35\n1 3 4 5 6 \n"
] | In the first sample Vasya should read at the first hour (light 20), third hour (light 30) and at the fourth hour (light 40). The minimum light Vasya will have to read at is 20. | 0 | [
{
"input": "5 3\n20 10 30 40 10",
"output": "20\n1 3 4 "
},
{
"input": "6 5\n90 20 35 40 60 100",
"output": "35\n1 3 4 5 6 "
},
{
"input": "100 7\n85 66 9 91 50 46 61 12 55 65 95 1 25 97 95 4 59 59 52 34 94 30 60 11 68 36 17 84 87 68 72 87 46 99 24 66 75 77 75 2 19 3 33 19 7 20 22 3 71 2... | 1,694,033,148 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 60 | 102,400 | def merge_sort(arr, indices):
if len(arr) <= 1:
return arr, indices
mitad = len(arr) // 2
mitad_izquierda = arr[:mitad]
mitad_derecha = arr[mitad:]
indices_izquierda = indices[:mitad]
indices_derecha = indices[mitad:]
mitad_izquierda, indices_izquierda = merge_sort(mitad_izquierda,... | Title: Reading
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya is going to the Olympics in the city Ntown by train. The boy wants to read the textbook to prepare for the Olympics. He counted that he needed *k* hours for this. He also found that the light in the train changes every ho... | ```python
def merge_sort(arr, indices):
if len(arr) <= 1:
return arr, indices
mitad = len(arr) // 2
mitad_izquierda = arr[:mitad]
mitad_derecha = arr[mitad:]
indices_izquierda = indices[:mitad]
indices_derecha = indices[mitad:]
mitad_izquierda, indices_izquierda = merge_sort(mitad_... | -1 | |
729 | B | Spotlights | PROGRAMMING | 1,200 | [
"dp",
"implementation"
] | null | null | Theater stage is a rectangular field of size *n*<=×<=*m*. The director gave you the stage's plan which actors will follow. For each cell it is stated in the plan if there would be an actor in this cell or not.
You are to place a spotlight on the stage in some good position. The spotlight will project light in one of t... | The first line contains two positive integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=1000) — the number of rows and the number of columns in the plan.
The next *n* lines contain *m* integers, 0 or 1 each — the description of the plan. Integer 1, means there will be an actor in the corresponding cell, while 0 means the cell ... | Print one integer — the number of good positions for placing the spotlight. | [
"2 4\n0 1 0 0\n1 0 1 0\n",
"4 4\n0 0 0 0\n1 0 0 1\n0 1 1 0\n0 1 0 0\n"
] | [
"9\n",
"20\n"
] | In the first example the following positions are good:
1. the (1, 1) cell and right direction; 1. the (1, 1) cell and down direction; 1. the (1, 3) cell and left direction; 1. the (1, 3) cell and down direction; 1. the (1, 4) cell and left direction; 1. the (2, 2) cell and left direction; 1. the (2, 2) cell and... | 1,000 | [
{
"input": "2 4\n0 1 0 0\n1 0 1 0",
"output": "9"
},
{
"input": "4 4\n0 0 0 0\n1 0 0 1\n0 1 1 0\n0 1 0 0",
"output": "20"
},
{
"input": "1 5\n1 1 0 0 0",
"output": "3"
},
{
"input": "2 10\n0 0 0 0 0 0 0 1 0 0\n1 0 0 0 0 0 0 0 0 0",
"output": "20"
},
{
"input": "3 ... | 1,627,390,927 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 27 | 1,000 | 13,107,200 | n, m = list(map(int,input().split()))
itog = 0
mass = []
for _ in range(n):
a = list(map(int,input().split()))
new = a.count(1)
last = 0
count = 0
mass.append(a)
for i in a:
if i == 1:
new -= 1
last += 1
else:
if last == 0 and new... | Title: Spotlights
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Theater stage is a rectangular field of size *n*<=×<=*m*. The director gave you the stage's plan which actors will follow. For each cell it is stated in the plan if there would be an actor in this cell or not.
You are to pl... | ```python
n, m = list(map(int,input().split()))
itog = 0
mass = []
for _ in range(n):
a = list(map(int,input().split()))
new = a.count(1)
last = 0
count = 0
mass.append(a)
for i in a:
if i == 1:
new -= 1
last += 1
else:
if last ==... | 0 | |
391 | A | Genetic Engineering | PROGRAMMING | 0 | [
"implementation",
"two pointers"
] | null | null | You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one protein. The stretch of DNA is represented by a string containing only the characters 'A', 'T', 'G' and 'C'.
... | The input consists of a single line, containing a string *s* of length *n* (1<=≤<=*n*<=≤<=100). Each character of *s* will be from the set {'A', 'T', 'G', 'C'}.
This problem doesn't have subproblems. You will get 3 points for the correct submission. | The program should print on one line a single integer representing the minimum number of 'A', 'T', 'G', 'C' characters that are required to be inserted into the input string in order to make all runs of identical characters have odd length. | [
"GTTAAAG\n",
"AACCAACCAAAAC\n"
] | [
"1\n",
"5\n"
] | In the first example, it is sufficient to insert a single nucleotide of any type between the two 'T's in the sequence to restore the functionality of the protein. | 3 | [
{
"input": "GTTAAAG",
"output": "1"
},
{
"input": "AACCAACCAAAAC",
"output": "5"
},
{
"input": "GTGAATTTCC",
"output": "2"
},
{
"input": "CAGGGGGCCGCCCATGAAAAAAACCCGGCCCCTTGGGAAAACTTGGGTTA",
"output": "7"
},
{
"input": "CCCTTCACCCGGATCCAAATCCCTTAGAAATAATCCCCGACGGC... | 1,553,850,852 | 2,147,483,647 | Python 3 | OK | TESTS | 20 | 156 | 819,200 | if __name__ == '__main__':
import re
string = input()
result = sum(1 for a in re.compile('[A]+').findall(string) if len(a) % 2 == 0)
result += sum(1 for a in re.compile('[T]+').findall(string) if len(a) % 2 == 0)
result += sum(1 for a in re.compile('[G]+').findall(string) if len(a) % 2 == 0)
re... | Title: Genetic Engineering
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You will receive 3 points for solving this problem.
Manao is designing the genetic code for a new type of algae to efficiently produce fuel. Specifically, Manao is focusing on a stretch of DNA that encodes one prot... | ```python
if __name__ == '__main__':
import re
string = input()
result = sum(1 for a in re.compile('[A]+').findall(string) if len(a) % 2 == 0)
result += sum(1 for a in re.compile('[T]+').findall(string) if len(a) % 2 == 0)
result += sum(1 for a in re.compile('[G]+').findall(string) if len(a) % 2 ==... | 3 | |
265 | A | Colorful Stones (Simplified Edition) | PROGRAMMING | 800 | [
"implementation"
] | null | null | There is a sequence of colorful stones. The color of each stone is one of red, green, or blue. You are given a string *s*. The *i*-th (1-based) character of *s* represents the color of the *i*-th stone. If the character is "R", "G", or "B", the color of the corresponding stone is red, green, or blue, respectively.
Ini... | The input contains two lines. The first line contains the string *s* (1<=≤<=|*s*|<=≤<=50). The second line contains the string *t* (1<=≤<=|*t*|<=≤<=50). The characters of each string will be one of "R", "G", or "B". It is guaranteed that Liss don't move out of the sequence. | Print the final 1-based position of Liss in a single line. | [
"RGB\nRRR\n",
"RRRBGBRBBB\nBBBRR\n",
"BRRBGBRGRBGRGRRGGBGBGBRGBRGRGGGRBRRRBRBBBGRRRGGBBB\nBBRBGGRGRGBBBRBGRBRBBBBRBRRRBGBBGBBRRBBGGRBRRBRGRB\n"
] | [
"2\n",
"3\n",
"15\n"
] | none | 500 | [
{
"input": "RGB\nRRR",
"output": "2"
},
{
"input": "RRRBGBRBBB\nBBBRR",
"output": "3"
},
{
"input": "BRRBGBRGRBGRGRRGGBGBGBRGBRGRGGGRBRRRBRBBBGRRRGGBBB\nBBRBGGRGRGBBBRBGRBRBBBBRBRRRBGBBGBBRRBBGGRBRRBRGRB",
"output": "15"
},
{
"input": "G\nRRBBRBRRBR",
"output": "1"
},
... | 1,657,177,267 | 2,147,483,647 | Python 3 | OK | TESTS | 19 | 92 | 0 | def move(colors, instructions):
idx = 0
for ch in instructions:
if ch == colors[idx]:
idx += 1
return idx + 1
colors = input()
instructions = input()
print(move(colors, instructions))
| Title: Colorful Stones (Simplified Edition)
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There is a sequence of colorful stones. The color of each stone is one of red, green, or blue. You are given a string *s*. The *i*-th (1-based) character of *s* represents the color of the *i*-th st... | ```python
def move(colors, instructions):
idx = 0
for ch in instructions:
if ch == colors[idx]:
idx += 1
return idx + 1
colors = input()
instructions = input()
print(move(colors, instructions))
``` | 3 | |
903 | A | Hungry Student Problem | PROGRAMMING | 900 | [
"greedy",
"implementation"
] | null | null | Ivan's classes at the university have just finished, and now he wants to go to the local CFK cafe and eat some fried chicken.
CFK sells chicken chunks in small and large portions. A small portion contains 3 chunks; a large one — 7 chunks. Ivan wants to eat exactly *x* chunks. Now he wonders whether he can buy exactly ... | The first line contains one integer *n* (1<=≤<=*n*<=≤<=100) — the number of testcases.
The *i*-th of the following *n* lines contains one integer *x**i* (1<=≤<=*x**i*<=≤<=100) — the number of chicken chunks Ivan wants to eat. | Print *n* lines, in *i*-th line output YES if Ivan can buy exactly *x**i* chunks. Otherwise, print NO. | [
"2\n6\n5\n"
] | [
"YES\nNO\n"
] | In the first example Ivan can buy two small portions.
In the second example Ivan cannot buy exactly 5 chunks, since one small portion is not enough, but two small portions or one large is too much. | 0 | [
{
"input": "2\n6\n5",
"output": "YES\nNO"
},
{
"input": "100\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\n17\n18\n19\n20\n21\n22\n23\n24\n25\n26\n27\n28\n29\n30\n31\n32\n33\n34\n35\n36\n37\n38\n39\n40\n41\n42\n43\n44\n45\n46\n47\n48\n49\n50\n51\n52\n53\n54\n55\n56\n57\n58\n59\n60\n61\n62\... | 1,645,017,950 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 1 | 46 | 0 | for _ in range(int(input())):
x=int(input())
if x%3!=0 and x%7!=0 and x%10!=0 and x%17!=0 and x%13!=0:
print('NO')
else:
print('YES') | Title: Hungry Student Problem
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Ivan's classes at the university have just finished, and now he wants to go to the local CFK cafe and eat some fried chicken.
CFK sells chicken chunks in small and large portions. A small portion contains 3 chun... | ```python
for _ in range(int(input())):
x=int(input())
if x%3!=0 and x%7!=0 and x%10!=0 and x%17!=0 and x%13!=0:
print('NO')
else:
print('YES')
``` | 0 | |
688 | A | Opponents | PROGRAMMING | 800 | [
"implementation"
] | null | null | Arya has *n* opponents in the school. Each day he will fight with all opponents who are present this day. His opponents have some fighting plan that guarantees they will win, but implementing this plan requires presence of them all. That means if one day at least one of Arya's opponents is absent at the school, then Ar... | The first line of the input contains two integers *n* and *d* (1<=≤<=*n*,<=*d*<=≤<=100) — the number of opponents and the number of days, respectively.
The *i*-th of the following *d* lines contains a string of length *n* consisting of characters '0' and '1'. The *j*-th character of this string is '0' if the *j*-th op... | Print the only integer — the maximum number of consecutive days that Arya will beat all present opponents. | [
"2 2\n10\n00\n",
"4 1\n0100\n",
"4 5\n1101\n1111\n0110\n1011\n1111\n"
] | [
"2\n",
"1\n",
"2\n"
] | In the first and the second samples, Arya will beat all present opponents each of the *d* days.
In the third sample, Arya will beat his opponents on days 1, 3 and 4 and his opponents will beat him on days 2 and 5. Thus, the maximum number of consecutive winning days is 2, which happens on days 3 and 4. | 500 | [
{
"input": "2 2\n10\n00",
"output": "2"
},
{
"input": "4 1\n0100",
"output": "1"
},
{
"input": "4 5\n1101\n1111\n0110\n1011\n1111",
"output": "2"
},
{
"input": "3 2\n110\n110",
"output": "2"
},
{
"input": "10 6\n1111111111\n0100110101\n1111111111\n0000011010\n1111... | 1,662,732,876 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | n=int(input())
d=int(input())
flag=0
for i in range(0,d):
k=input()
for j in range(0,len(k)):
if(k[j]=='0'):
flag=flag+1
else:
continue
print(int(flag/2))
| Title: Opponents
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Arya has *n* opponents in the school. Each day he will fight with all opponents who are present this day. His opponents have some fighting plan that guarantees they will win, but implementing this plan requires presence of th... | ```python
n=int(input())
d=int(input())
flag=0
for i in range(0,d):
k=input()
for j in range(0,len(k)):
if(k[j]=='0'):
flag=flag+1
else:
continue
print(int(flag/2))
``` | -1 | |
841 | B | Godsend | PROGRAMMING | 1,100 | [
"games",
"math"
] | null | null | Leha somehow found an array consisting of *n* integers. Looking at it, he came up with a task. Two players play the game on the array. Players move one by one. The first player can choose for his move a subsegment of non-zero length with an odd sum of numbers and remove it from the array, after that the remaining parts... | First line of input data contains single integer *n* (1<=≤<=*n*<=≤<=106) — length of the array.
Next line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (0<=≤<=*a**i*<=≤<=109). | Output answer in single line. "First", if first player wins, and "Second" otherwise (without quotes). | [
"4\n1 3 2 3\n",
"2\n2 2\n"
] | [
"First\n",
"Second\n"
] | In first sample first player remove whole array in one move and win.
In second sample first player can't make a move and lose. | 1,000 | [
{
"input": "4\n1 3 2 3",
"output": "First"
},
{
"input": "2\n2 2",
"output": "Second"
},
{
"input": "4\n2 4 6 8",
"output": "Second"
},
{
"input": "5\n1 1 1 1 1",
"output": "First"
},
{
"input": "4\n720074544 345031254 849487632 80870826",
"output": "Second"
... | 1,670,239,882 | 2,147,483,647 | PyPy 3-64 | RUNTIME_ERROR | TESTS | 0 | 62 | 2,764,800 | n=int(input())
ok=False
a=list(map(int, input().split()))
for i in a:
ok |= (a&1)!=0
print('First' if ok else 'Second') | Title: Godsend
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Leha somehow found an array consisting of *n* integers. Looking at it, he came up with a task. Two players play the game on the array. Players move one by one. The first player can choose for his move a subsegment of non-zero l... | ```python
n=int(input())
ok=False
a=list(map(int, input().split()))
for i in a:
ok |= (a&1)!=0
print('First' if ok else 'Second')
``` | -1 | |
262 | B | Roma and Changing Signs | PROGRAMMING | 1,200 | [
"greedy"
] | null | null | Roma works in a company that sells TVs. Now he has to prepare a report for the last year.
Roma has got a list of the company's incomes. The list is a sequence that consists of *n* integers. The total income of the company is the sum of all integers in sequence. Roma decided to perform exactly *k* changes of signs of s... | The first line contains two integers *n* and *k* (1<=≤<=*n*,<=*k*<=≤<=105), showing, how many numbers are in the sequence and how many swaps are to be made.
The second line contains a non-decreasing sequence, consisting of *n* integers *a**i* (|*a**i*|<=≤<=104).
The numbers in the lines are separated by single spaces... | In the single line print the answer to the problem — the maximum total income that we can obtain after exactly *k* changes. | [
"3 2\n-1 -1 1\n",
"3 1\n-1 -1 1\n"
] | [
"3\n",
"1\n"
] | In the first sample we can get sequence [1, 1, 1], thus the total income equals 3.
In the second test, the optimal strategy is to get sequence [-1, 1, 1], thus the total income equals 1. | 1,000 | [
{
"input": "3 2\n-1 -1 1",
"output": "3"
},
{
"input": "3 1\n-1 -1 1",
"output": "1"
},
{
"input": "17 27\n257 320 676 1136 2068 2505 2639 4225 4951 5786 7677 7697 7851 8337 8429 8469 9343",
"output": "81852"
},
{
"input": "69 28\n-9822 -9264 -9253 -9221 -9139 -9126 -9096 -89... | 1,605,109,937 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 248 | 0 | from sys import stdin ,stdout
from os import path
if(path.exists('input.txt')):
stdin = open("input.txt","r")
import heapq
a,b = map(int,stdin.readline().strip().split())
amr = list(map(int,stdin.readline().strip().split()))
heapq.heapify(amr)
sum = 0
while amr :
x = heapq.heappop(amr)
if x < 0 and b ... | Title: Roma and Changing Signs
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Roma works in a company that sells TVs. Now he has to prepare a report for the last year.
Roma has got a list of the company's incomes. The list is a sequence that consists of *n* integers. The total income of ... | ```python
from sys import stdin ,stdout
from os import path
if(path.exists('input.txt')):
stdin = open("input.txt","r")
import heapq
a,b = map(int,stdin.readline().strip().split())
amr = list(map(int,stdin.readline().strip().split()))
heapq.heapify(amr)
sum = 0
while amr :
x = heapq.heappop(amr)
if x ... | 0 | |
323 | A | Black-and-White Cube | PROGRAMMING | 1,600 | [
"combinatorics",
"constructive algorithms"
] | null | null | You are given a cube of size *k*<=×<=*k*<=×<=*k*, which consists of unit cubes. Two unit cubes are considered neighbouring, if they have common face.
Your task is to paint each of *k*3 unit cubes one of two colours (black or white), so that the following conditions must be satisfied:
- each white cube has exactly 2 ... | The first line contains integer *k* (1<=≤<=*k*<=≤<=100), which is size of the cube. | Print -1 if there is no solution. Otherwise, print the required painting of the cube consequently by layers. Print a *k*<=×<=*k* matrix in the first *k* lines, showing how the first layer of the cube should be painted. In the following *k* lines print a *k*<=×<=*k* matrix — the way the second layer should be painted. A... | [
"1\n",
"2\n"
] | [
"-1\n",
"bb\nww\n\nbb\nww\n"
] | none | 500 | [
{
"input": "1",
"output": "-1"
},
{
"input": "2",
"output": "bb\nww\n\nbb\nww"
},
{
"input": "3",
"output": "-1"
},
{
"input": "4",
"output": "bbbb\nbwwb\nbwwb\nbbbb\n\nwwww\nwbbw\nwbbw\nwwww\n\nbbbb\nbwwb\nbwwb\nbbbb\n\nwwww\nwbbw\nwbbw\nwwww"
},
{
"input": "5",
... | 1,684,931,274 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 30 | 0 | k = int(input())
flag = 1
if k % 2:
print(-1)
else:
temp = [0] * k
for i in range(k):
for j in range(k):
if flag:
print("bbww" * (k // 4) + "bbww"[:k % 4])
else:
print("wwbb" * (k // 4) + "wwbb"[:k % 4])
flag ^= 1
... | Title: Black-and-White Cube
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given a cube of size *k*<=×<=*k*<=×<=*k*, which consists of unit cubes. Two unit cubes are considered neighbouring, if they have common face.
Your task is to paint each of *k*3 unit cubes one of two colour... | ```python
k = int(input())
flag = 1
if k % 2:
print(-1)
else:
temp = [0] * k
for i in range(k):
for j in range(k):
if flag:
print("bbww" * (k // 4) + "bbww"[:k % 4])
else:
print("wwbb" * (k // 4) + "wwbb"[:k % 4])
flag ^... | 0 | |
919 | B | Perfect Number | PROGRAMMING | 1,100 | [
"binary search",
"brute force",
"dp",
"implementation",
"number theory"
] | null | null | We consider a positive integer perfect, if and only if the sum of its digits is exactly $10$. Given a positive integer $k$, your task is to find the $k$-th smallest perfect positive integer. | A single line with a positive integer $k$ ($1 \leq k \leq 10\,000$). | A single number, denoting the $k$-th smallest perfect integer. | [
"1\n",
"2\n"
] | [
"19\n",
"28\n"
] | The first perfect integer is $19$ and the second one is $28$. | 750 | [
{
"input": "1",
"output": "19"
},
{
"input": "2",
"output": "28"
},
{
"input": "13",
"output": "136"
},
{
"input": "101",
"output": "1432"
},
{
"input": "1023",
"output": "100270"
},
{
"input": "9999",
"output": "10800010"
},
{
"input": "10... | 1,623,138,614 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 2 | 155 | 0 | def digi(a):
s=0
while a>0:
s+=a%10
a//=10
return s
x=int(input())
while 1:
t=(x+1)*10-x
if digi(t)==10:
print(t)
break
x+=1 | Title: Perfect Number
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
We consider a positive integer perfect, if and only if the sum of its digits is exactly $10$. Given a positive integer $k$, your task is to find the $k$-th smallest perfect positive integer.
Input Specification:
A singl... | ```python
def digi(a):
s=0
while a>0:
s+=a%10
a//=10
return s
x=int(input())
while 1:
t=(x+1)*10-x
if digi(t)==10:
print(t)
break
x+=1
``` | 0 | |
120 | A | Elevator | PROGRAMMING | 1,000 | [
"brute force",
"implementation",
"math"
] | null | null | A sky scraper with 1000 floors has been built in the city of N. It has modern superfast elevators to help to travel from one floor to another. Each elevator has two doors, the front one and the back one. If one goes in through the front door, he goes out through the back one and vice versa. The elevator has two rails n... | The first line indicates the door through which the very important person entered the elevator. It contains "front" if the person enters the elevator through the front door and "back" if he entered the elevator through the back door. The second line contains integer *a* (1<=≤<=*a*<=≤<=2) which denotes the number of the... | Print character "R" if the VIP is right-handed or "L" if he is left-handed. | [
"front\n1\n"
] | [
"L\n"
] | none | 0 | [
{
"input": "front\n1",
"output": "L"
},
{
"input": "back\n1",
"output": "R"
},
{
"input": "front\n2",
"output": "R"
},
{
"input": "back\n2",
"output": "L"
}
] | 1,601,017,307 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 218 | 0 | f=open("input.txt","r")
o=open("output.txt","w")
s=f.readline()
n=f.readline()
if s=="front":
if n=="1":
o.write("L")
else:
o.write("R")
elif s=="back":
if n=="1":
o.write("R")
else:
o.write("L") | Title: Elevator
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A sky scraper with 1000 floors has been built in the city of N. It has modern superfast elevators to help to travel from one floor to another. Each elevator has two doors, the front one and the back one. If one goes in through... | ```python
f=open("input.txt","r")
o=open("output.txt","w")
s=f.readline()
n=f.readline()
if s=="front":
if n=="1":
o.write("L")
else:
o.write("R")
elif s=="back":
if n=="1":
o.write("R")
else:
o.write("L")
``` | 0 | |
818 | B | Permutation Game | PROGRAMMING | 1,600 | [
"implementation"
] | null | null | *n* children are standing in a circle and playing a game. Children's numbers in clockwise order form a permutation *a*1,<=*a*2,<=...,<=*a**n* of length *n*. It is an integer sequence such that each integer from 1 to *n* appears exactly once in it.
The game consists of *m* steps. On each step the current leader with in... | The first line contains two integer numbers *n*, *m* (1<=≤<=*n*,<=*m*<=≤<=100).
The second line contains *m* integer numbers *l*1,<=*l*2,<=...,<=*l**m* (1<=≤<=*l**i*<=≤<=*n*) — indices of leaders in the beginning of each step. | Print such permutation of *n* numbers *a*1,<=*a*2,<=...,<=*a**n* that leaders in the game will be exactly *l*1,<=*l*2,<=...,<=*l**m* if all the rules are followed. If there are multiple solutions print any of them.
If there is no permutation which satisfies all described conditions print -1. | [
"4 5\n2 3 1 4 4\n",
"3 3\n3 1 2\n"
] | [
"3 1 2 4 \n",
"-1\n"
] | Let's follow leadership in the first example:
- Child 2 starts. - Leadership goes from 2 to 2 + *a*<sub class="lower-index">2</sub> = 3. - Leadership goes from 3 to 3 + *a*<sub class="lower-index">3</sub> = 5. As it's greater than 4, it's going in a circle to 1. - Leadership goes from 1 to 1 + *a*<sub class="lowe... | 0 | [
{
"input": "4 5\n2 3 1 4 4",
"output": "3 1 2 4 "
},
{
"input": "3 3\n3 1 2",
"output": "-1"
},
{
"input": "1 100\n1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1... | 1,498,755,648 | 6,948 | PyPy 3 | WRONG_ANSWER | TESTS | 13 | 108 | 23,142,400 | n, m = map(int, input().split())
l = list(map(int, input().split()))
used = [False for _ in range(n + 1)]
ans = [0 for _ in range(n)]
f = True
for i in range(m - 1):
d = (l[i + 1] - l[i] + n) % n
if ans[l[i] - 1] == 0 and not used[d]:
ans[l[i] - 1] = d
used[d] = True
elif ans[l[i] - 1] != d:... | Title: Permutation Game
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
*n* children are standing in a circle and playing a game. Children's numbers in clockwise order form a permutation *a*1,<=*a*2,<=...,<=*a**n* of length *n*. It is an integer sequence such that each integer from 1 to *n... | ```python
n, m = map(int, input().split())
l = list(map(int, input().split()))
used = [False for _ in range(n + 1)]
ans = [0 for _ in range(n)]
f = True
for i in range(m - 1):
d = (l[i + 1] - l[i] + n) % n
if ans[l[i] - 1] == 0 and not used[d]:
ans[l[i] - 1] = d
used[d] = True
elif ans[l[i] ... | 0 | |
637 | B | Chat Order | PROGRAMMING | 1,200 | [
"*special",
"binary search",
"constructive algorithms",
"data structures",
"sortings"
] | null | null | Polycarp is a big lover of killing time in social networks. A page with a chatlist in his favourite network is made so that when a message is sent to some friend, his friend's chat rises to the very top of the page. The relative order of the other chats doesn't change. If there was no chat with this friend before, then... | The first line contains integer *n* (1<=≤<=*n*<=≤<=200<=000) — the number of Polycarpus' messages. Next *n* lines enlist the message recipients in the order in which the messages were sent. The name of each participant is a non-empty sequence of lowercase English letters of length at most 10. | Print all the recipients to who Polycarp talked to in the order of chats with them, from top to bottom. | [
"4\nalex\nivan\nroman\nivan\n",
"8\nalina\nmaria\nekaterina\ndarya\ndarya\nekaterina\nmaria\nalina\n"
] | [
"ivan\nroman\nalex\n",
"alina\nmaria\nekaterina\ndarya\n"
] | In the first test case Polycarpus first writes to friend by name "alex", and the list looks as follows:
1. alex
Then Polycarpus writes to friend by name "ivan" and the list looks as follows:
1. ivan 1. alex
Polycarpus writes the third message to friend by name "roman" and the list looks as follows:
1. roman 1... | 1,000 | [
{
"input": "4\nalex\nivan\nroman\nivan",
"output": "ivan\nroman\nalex"
},
{
"input": "8\nalina\nmaria\nekaterina\ndarya\ndarya\nekaterina\nmaria\nalina",
"output": "alina\nmaria\nekaterina\ndarya"
},
{
"input": "1\nwdi",
"output": "wdi"
},
{
"input": "2\nypg\nypg",
"outpu... | 1,676,820,409 | 2,147,483,647 | Python 3 | OK | TESTS | 95 | 608 | 18,432,000 | x = int(input())
lst = []
for i in range(x):
y = input()
lst.append(y)
lst.reverse()
dict = {}
for el in lst:
if el not in dict:
print(el)
dict[el]=1
| Title: Chat Order
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Polycarp is a big lover of killing time in social networks. A page with a chatlist in his favourite network is made so that when a message is sent to some friend, his friend's chat rises to the very top of the page. The rela... | ```python
x = int(input())
lst = []
for i in range(x):
y = input()
lst.append(y)
lst.reverse()
dict = {}
for el in lst:
if el not in dict:
print(el)
dict[el]=1
``` | 3 | |
520 | A | Pangram | PROGRAMMING | 800 | [
"implementation",
"strings"
] | null | null | A word or a sentence in some language is called a pangram if all the characters of the alphabet of this language appear in it at least once. Pangrams are often used to demonstrate fonts in printing or test the output devices.
You are given a string consisting of lowercase and uppercase Latin letters. Check whether thi... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=100) — the number of characters in the string.
The second line contains the string. The string consists only of uppercase and lowercase Latin letters. | Output "YES", if the string is a pangram and "NO" otherwise. | [
"12\ntoosmallword\n",
"35\nTheQuickBrownFoxJumpsOverTheLazyDog\n"
] | [
"NO\n",
"YES\n"
] | none | 500 | [
{
"input": "12\ntoosmallword",
"output": "NO"
},
{
"input": "35\nTheQuickBrownFoxJumpsOverTheLazyDog",
"output": "YES"
},
{
"input": "1\na",
"output": "NO"
},
{
"input": "26\nqwertyuiopasdfghjklzxcvbnm",
"output": "YES"
},
{
"input": "26\nABCDEFGHIJKLMNOPQRSTUVWXY... | 1,694,090,063 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 1 | 62 | 0 | s=input()
l=s.lower()
s1=set()
for i in l:
if i>='a' and i<='z':
s.add(i)
if len(s)==26:
print("YES")
else:
print("NO") | Title: Pangram
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A word or a sentence in some language is called a pangram if all the characters of the alphabet of this language appear in it at least once. Pangrams are often used to demonstrate fonts in printing or test the output devices.
... | ```python
s=input()
l=s.lower()
s1=set()
for i in l:
if i>='a' and i<='z':
s.add(i)
if len(s)==26:
print("YES")
else:
print("NO")
``` | 0 | |
137 | E | Last Chance | PROGRAMMING | 2,000 | [
"data structures",
"implementation",
"strings"
] | null | null | Having read half of the book called "Storm and Calm" on the IT lesson, Innocentius was absolutely determined to finish the book on the maths lessons. All was fine until the math teacher Ms. Watkins saw Innocentius reading fiction books instead of solving equations of the fifth degree. As during the last maths class Inn... | The only input line contains a non-empty string *s* consisting of no more than 2·105 uppercase and lowercase Latin letters. We shall regard letters "a", "e", "i", "o", "u" and their uppercase variants as vowels. | Print on a single line two numbers without a space: the maximum length of a good substring and the number of good substrings with this length. If no good substring exists, print "No solution" without the quotes.
Two substrings are considered different if their positions of occurrence are different. So if some string o... | [
"Abo\n",
"OEIS\n",
"auBAAbeelii\n",
"AaaBRAaaCAaaDAaaBRAaa\n",
"EA\n"
] | [
"3 1\n",
"3 1\n",
"9 3\n",
"18 4\n",
"No solution\n"
] | In the first sample there is only one longest good substring: "Abo" itself. The other good substrings are "b", "Ab", "bo", but these substrings have shorter length.
In the second sample there is only one longest good substring: "EIS". The other good substrings are: "S", "IS". | 2,500 | [
{
"input": "Abo",
"output": "3 1"
},
{
"input": "OEIS",
"output": "3 1"
},
{
"input": "auBAAbeelii",
"output": "9 3"
},
{
"input": "AaaBRAaaCAaaDAaaBRAaa",
"output": "18 4"
},
{
"input": "EA",
"output": "No solution"
},
{
"input": "BBBAABAABAABBBB",
... | 1,651,595,732 | 2,147,483,647 | PyPy 3 | OK | TESTS | 76 | 498 | 25,088,000 | import sys, os, io
input = io.BytesIO(os.read(0, os.fstat(0).st_size)).readline
def segment_tree(n, a):
i = 2
while True:
if i >= n * 2:
tree = [inf] * i
break
else:
i *= 2
l = len(tree) // 2
for i in range(l, l + len(a)):
tree[i]... | Title: Last Chance
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Having read half of the book called "Storm and Calm" on the IT lesson, Innocentius was absolutely determined to finish the book on the maths lessons. All was fine until the math teacher Ms. Watkins saw Innocentius reading f... | ```python
import sys, os, io
input = io.BytesIO(os.read(0, os.fstat(0).st_size)).readline
def segment_tree(n, a):
i = 2
while True:
if i >= n * 2:
tree = [inf] * i
break
else:
i *= 2
l = len(tree) // 2
for i in range(l, l + len(a)):
... | 3 | |
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"... | 1,606,587,629 | 2,147,483,647 | Python 3 | OK | TESTS | 32 | 218 | 0 | n = int(input())
st = list(map(int,input().split()))
a,b=0,0
for i in range(n):
if(st[i]%2==0):
a+=1
x=i
else:
b+=1
y=i
if(a==1):
print(x+1)
elif(b==1):
print(y+1) | 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())
st = list(map(int,input().split()))
a,b=0,0
for i in range(n):
if(st[i]%2==0):
a+=1
x=i
else:
b+=1
y=i
if(a==1):
print(x+1)
elif(b==1):
print(y+1)
``` | 3.9455 |
219 | A | k-String | PROGRAMMING | 1,000 | [
"implementation",
"strings"
] | null | null | A string is called a *k*-string if it can be represented as *k* concatenated copies of some string. For example, the string "aabaabaabaab" is at the same time a 1-string, a 2-string and a 4-string, but it is not a 3-string, a 5-string, or a 6-string and so on. Obviously any string is a 1-string.
You are given a string... | The first input line contains integer *k* (1<=≤<=*k*<=≤<=1000). The second line contains *s*, all characters in *s* are lowercase English letters. The string length *s* satisfies the inequality 1<=≤<=|*s*|<=≤<=1000, where |*s*| is the length of string *s*. | Rearrange the letters in string *s* in such a way that the result is a *k*-string. Print the result on a single output line. If there are multiple solutions, print any of them.
If the solution doesn't exist, print "-1" (without quotes). | [
"2\naazz\n",
"3\nabcabcabz\n"
] | [
"azaz\n",
"-1\n"
] | none | 500 | [
{
"input": "2\naazz",
"output": "azaz"
},
{
"input": "3\nabcabcabz",
"output": "-1"
},
{
"input": "1\na",
"output": "a"
},
{
"input": "2\nabba",
"output": "abab"
},
{
"input": "2\naaab",
"output": "-1"
},
{
"input": "7\nabacaba",
"output": "-1"
}... | 1,672,939,451 | 2,147,483,647 | Python 3 | OK | TESTS | 42 | 92 | 0 | n = int(input())
string = input()
uniques = list(set(string))
output = []
ck = True
for char in uniques:
cnt = string.count(char)
if cnt%n != 0:
ck = False
break
else:
listt = [char]*(cnt//n)
output.extend(listt)
if ck:
print(''.join(output * n))
else:
... | Title: k-String
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A string is called a *k*-string if it can be represented as *k* concatenated copies of some string. For example, the string "aabaabaabaab" is at the same time a 1-string, a 2-string and a 4-string, but it is not a 3-string, a ... | ```python
n = int(input())
string = input()
uniques = list(set(string))
output = []
ck = True
for char in uniques:
cnt = string.count(char)
if cnt%n != 0:
ck = False
break
else:
listt = [char]*(cnt//n)
output.extend(listt)
if ck:
print(''.join(output * n))
... | 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... | 1,594,047,506 | 2,147,483,647 | PyPy 3 | OK | TESTS | 30 | 310 | 20,172,800 | s = input()
Count = 0
count = 0
for i in s:
if(i.islower()):
count += 1
elif(i.isupper()):
Count += 1
if Count > count:
print(s.upper())
elif count >= Count:
print(s.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
s = input()
Count = 0
count = 0
for i in s:
if(i.islower()):
count += 1
elif(i.isupper()):
Count += 1
if Count > count:
print(s.upper())
elif count >= Count:
print(s.lower())
``` | 3.884925 |
230 | B | T-primes | PROGRAMMING | 1,300 | [
"binary search",
"implementation",
"math",
"number theory"
] | null | null | We know that prime numbers are positive integers that have exactly two distinct positive divisors. Similarly, we'll call a positive integer *t* Т-prime, if *t* has exactly three distinct positive divisors.
You are given an array of *n* positive integers. For each of them determine whether it is Т-prime or not. | The first line contains a single positive integer, *n* (1<=≤<=*n*<=≤<=105), showing how many numbers are in the array. The next line contains *n* space-separated integers *x**i* (1<=≤<=*x**i*<=≤<=1012).
Please, do not use the %lld specifier to read or write 64-bit integers in С++. It is advised to use the cin, cout st... | Print *n* lines: the *i*-th line should contain "YES" (without the quotes), if number *x**i* is Т-prime, and "NO" (without the quotes), if it isn't. | [
"3\n4 5 6\n"
] | [
"YES\nNO\nNO\n"
] | The given test has three numbers. The first number 4 has exactly three divisors — 1, 2 and 4, thus the answer for this number is "YES". The second number 5 has two divisors (1 and 5), and the third number 6 has four divisors (1, 2, 3, 6), hence the answer for them is "NO". | 500 | [
{
"input": "3\n4 5 6",
"output": "YES\nNO\nNO"
},
{
"input": "2\n48 49",
"output": "NO\nYES"
},
{
"input": "10\n10 9 8 7 6 5 4 3 2 1",
"output": "NO\nYES\nNO\nNO\nNO\nNO\nYES\nNO\nNO\nNO"
},
{
"input": "1\n36",
"output": "NO"
},
{
"input": "1\n999966000289",
"... | 1,696,939,886 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 60 | 0 | import math
n = int(input())
numbers = list(map(int,input().split()))
for i in range(n):
if math.sqrt(numbers[i]) % 1 != 0:
print("NO")
else:
T_prime = True
for j in range(2,int(math.sqrt(numbers[i]))):
if numbers[i] % j == 0:
print("NO")
... | Title: T-primes
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
We know that prime numbers are positive integers that have exactly two distinct positive divisors. Similarly, we'll call a positive integer *t* Т-prime, if *t* has exactly three distinct positive divisors.
You are given an ar... | ```python
import math
n = int(input())
numbers = list(map(int,input().split()))
for i in range(n):
if math.sqrt(numbers[i]) % 1 != 0:
print("NO")
else:
T_prime = True
for j in range(2,int(math.sqrt(numbers[i]))):
if numbers[i] % j == 0:
print("NO")... | 0 | |
166 | E | Tetrahedron | PROGRAMMING | 1,500 | [
"dp",
"math",
"matrices"
] | null | null | You are given a tetrahedron. Let's mark its vertices with letters *A*, *B*, *C* and *D* correspondingly.
An ant is standing in the vertex *D* of the tetrahedron. The ant is quite active and he wouldn't stay idle. At each moment of time he makes a step from one vertex to another one along some edge of the tetrahedron. ... | The first line contains the only integer *n* (1<=≤<=*n*<=≤<=107) — the required length of the cyclic path. | Print the only integer — the required number of ways modulo 1000000007 (109<=+<=7). | [
"2\n",
"4\n"
] | [
"3\n",
"21\n"
] | The required paths in the first sample are:
- *D* - *A* - *D* - *D* - *B* - *D* - *D* - *C* - *D* | 1,000 | [
{
"input": "2",
"output": "3"
},
{
"input": "4",
"output": "21"
},
{
"input": "1",
"output": "0"
},
{
"input": "3",
"output": "6"
},
{
"input": "5",
"output": "60"
},
{
"input": "6",
"output": "183"
},
{
"input": "7",
"output": "546"
... | 1,698,028,854 | 2,147,483,647 | Python 3 | MEMORY_LIMIT_EXCEEDED | TESTS | 12 | 1,964 | 268,390,400 | def ant_paths(n):
d, a = [0] * (n + 1), [0] * (n + 1)
d[0], a[0] = 1, 0
for i in range(1, n + 1):
d[i] = (3 * a[i - 1]) % 1000000007
a[i] = (d[i - 1] + 2 * a[i - 1]) % 1000000007
return d[n]
n = int(input().strip())
print(ant_paths(n))
| Title: Tetrahedron
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given a tetrahedron. Let's mark its vertices with letters *A*, *B*, *C* and *D* correspondingly.
An ant is standing in the vertex *D* of the tetrahedron. The ant is quite active and he wouldn't stay idle. At each m... | ```python
def ant_paths(n):
d, a = [0] * (n + 1), [0] * (n + 1)
d[0], a[0] = 1, 0
for i in range(1, n + 1):
d[i] = (3 * a[i - 1]) % 1000000007
a[i] = (d[i - 1] + 2 * a[i - 1]) % 1000000007
return d[n]
n = int(input().strip())
print(ant_paths(n))
``` | 0 | |
805 | A | Fake NP | PROGRAMMING | 1,000 | [
"greedy",
"math"
] | null | null | Tavak and Seyyed are good friends. Seyyed is very funny and he told Tavak to solve the following problem instead of longest-path.
You are given *l* and *r*. For all integers from *l* to *r*, inclusive, we wrote down all of their integer divisors except 1. Find the integer that we wrote down the maximum number of times... | The first line contains two integers *l* and *r* (2<=≤<=*l*<=≤<=*r*<=≤<=109). | Print single integer, the integer that appears maximum number of times in the divisors.
If there are multiple answers, print any of them. | [
"19 29\n",
"3 6\n"
] | [
"2\n",
"3\n"
] | Definition of a divisor: [https://www.mathsisfun.com/definitions/divisor-of-an-integer-.html](https://www.mathsisfun.com/definitions/divisor-of-an-integer-.html)
The first example: from 19 to 29 these numbers are divisible by 2: {20, 22, 24, 26, 28}.
The second example: from 3 to 6 these numbers are divisible by 3: {... | 500 | [
{
"input": "19 29",
"output": "2"
},
{
"input": "3 6",
"output": "2"
},
{
"input": "39 91",
"output": "2"
},
{
"input": "76 134",
"output": "2"
},
{
"input": "93 95",
"output": "2"
},
{
"input": "17 35",
"output": "2"
},
{
"input": "94 95",... | 1,598,872,522 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 12 | 1,000 | 6,758,400 | x,y = map(int, input().split());t=[];d=0
for i in range(x,y+1):
for j in range(2,x+1):
if i%j==0:
t.append(j)
d = max(t.count(j),d)
t.sort()
for i in t:
if t.count(i) == d:
d = i
break
print(d) | Title: Fake NP
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Tavak and Seyyed are good friends. Seyyed is very funny and he told Tavak to solve the following problem instead of longest-path.
You are given *l* and *r*. For all integers from *l* to *r*, inclusive, we wrote down all of the... | ```python
x,y = map(int, input().split());t=[];d=0
for i in range(x,y+1):
for j in range(2,x+1):
if i%j==0:
t.append(j)
d = max(t.count(j),d)
t.sort()
for i in t:
if t.count(i) == d:
d = i
break
print(d)
``` | 0 | |
621 | B | Wet Shark and Bishops | PROGRAMMING | 1,300 | [
"combinatorics",
"implementation"
] | null | null | Today, Wet Shark is given *n* bishops on a 1000 by 1000 grid. Both rows and columns of the grid are numbered from 1 to 1000. Rows are numbered from top to bottom, while columns are numbered from left to right.
Wet Shark thinks that two bishops attack each other if they share the same diagonal. Note, that this is the o... | The first line of the input contains *n* (1<=≤<=*n*<=≤<=200<=000) — the number of bishops.
Each of next *n* lines contains two space separated integers *x**i* and *y**i* (1<=≤<=*x**i*,<=*y**i*<=≤<=1000) — the number of row and the number of column where *i*-th bishop is positioned. It's guaranteed that no two bishops ... | Output one integer — the number of pairs of bishops which attack each other. | [
"5\n1 1\n1 5\n3 3\n5 1\n5 5\n",
"3\n1 1\n2 3\n3 5\n"
] | [
"6\n",
"0\n"
] | In the first sample following pairs of bishops attack each other: (1, 3), (1, 5), (2, 3), (2, 4), (3, 4) and (3, 5). Pairs (1, 2), (1, 4), (2, 5) and (4, 5) do not attack each other because they do not share the same diagonal. | 1,000 | [
{
"input": "5\n1 1\n1 5\n3 3\n5 1\n5 5",
"output": "6"
},
{
"input": "3\n1 1\n2 3\n3 5",
"output": "0"
},
{
"input": "3\n859 96\n634 248\n808 72",
"output": "0"
},
{
"input": "3\n987 237\n891 429\n358 145",
"output": "0"
},
{
"input": "3\n411 81\n149 907\n611 114"... | 1,666,558,407 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 30 | 0 | number_of_bishops = int(input())
data = {
# y max and x max value same for min values
"coor_min" : 1 ,
"coor_max" : 1000
}
info = {}
counter = 0
for i in range(0 , number_of_bishops) :
coor = list(map(int , input().split()))
dif1 = coor[0] - data["coor_min"] # different between X-min and main ... | Title: Wet Shark and Bishops
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Today, Wet Shark is given *n* bishops on a 1000 by 1000 grid. Both rows and columns of the grid are numbered from 1 to 1000. Rows are numbered from top to bottom, while columns are numbered from left to right.
We... | ```python
number_of_bishops = int(input())
data = {
# y max and x max value same for min values
"coor_min" : 1 ,
"coor_max" : 1000
}
info = {}
counter = 0
for i in range(0 , number_of_bishops) :
coor = list(map(int , input().split()))
dif1 = coor[0] - data["coor_min"] # different between X-min... | 0 | |
265 | A | Colorful Stones (Simplified Edition) | PROGRAMMING | 800 | [
"implementation"
] | null | null | There is a sequence of colorful stones. The color of each stone is one of red, green, or blue. You are given a string *s*. The *i*-th (1-based) character of *s* represents the color of the *i*-th stone. If the character is "R", "G", or "B", the color of the corresponding stone is red, green, or blue, respectively.
Ini... | The input contains two lines. The first line contains the string *s* (1<=≤<=|*s*|<=≤<=50). The second line contains the string *t* (1<=≤<=|*t*|<=≤<=50). The characters of each string will be one of "R", "G", or "B". It is guaranteed that Liss don't move out of the sequence. | Print the final 1-based position of Liss in a single line. | [
"RGB\nRRR\n",
"RRRBGBRBBB\nBBBRR\n",
"BRRBGBRGRBGRGRRGGBGBGBRGBRGRGGGRBRRRBRBBBGRRRGGBBB\nBBRBGGRGRGBBBRBGRBRBBBBRBRRRBGBBGBBRRBBGGRBRRBRGRB\n"
] | [
"2\n",
"3\n",
"15\n"
] | none | 500 | [
{
"input": "RGB\nRRR",
"output": "2"
},
{
"input": "RRRBGBRBBB\nBBBRR",
"output": "3"
},
{
"input": "BRRBGBRGRBGRGRRGGBGBGBRGBRGRGGGRBRRRBRBBBGRRRGGBBB\nBBRBGGRGRGBBBRBGRBRBBBBRBRRRBGBBGBBRRBBGGRBRRBRGRB",
"output": "15"
},
{
"input": "G\nRRBBRBRRBR",
"output": "1"
},
... | 1,664,642,335 | 2,147,483,647 | Python 3 | OK | TESTS | 19 | 92 | 0 | A = input()
B = input()
BB = list(B)
AA = list(A)
n = len(B)
k = 1
for i in range(n):
if AA[0] == BB[0]:
AA.remove(AA[0])
BB.remove(BB[0])
k += 1
else:
BB.remove(BB[0])
print(k)
| Title: Colorful Stones (Simplified Edition)
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There is a sequence of colorful stones. The color of each stone is one of red, green, or blue. You are given a string *s*. The *i*-th (1-based) character of *s* represents the color of the *i*-th st... | ```python
A = input()
B = input()
BB = list(B)
AA = list(A)
n = len(B)
k = 1
for i in range(n):
if AA[0] == BB[0]:
AA.remove(AA[0])
BB.remove(BB[0])
k += 1
else:
BB.remove(BB[0])
print(k)
``` | 3 | |
509 | A | Maximum in Table | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | An *n*<=×<=*n* table *a* is defined as follows:
- The first row and the first column contain ones, that is: *a**i*,<=1<==<=*a*1,<=*i*<==<=1 for all *i*<==<=1,<=2,<=...,<=*n*. - Each of the remaining numbers in the table is equal to the sum of the number above it and the number to the left of it. In other words, the ... | The only line of input contains a positive integer *n* (1<=≤<=*n*<=≤<=10) — the number of rows and columns of the table. | Print a single line containing a positive integer *m* — the maximum value in the table. | [
"1\n",
"5\n"
] | [
"1",
"70"
] | In the second test the rows of the table look as follows: | 0 | [
{
"input": "1",
"output": "1"
},
{
"input": "5",
"output": "70"
},
{
"input": "2",
"output": "2"
},
{
"input": "3",
"output": "6"
},
{
"input": "4",
"output": "20"
},
{
"input": "6",
"output": "252"
},
{
"input": "7",
"output": "924"
... | 1,596,980,967 | 2,147,483,647 | PyPy 3 | OK | TESTS | 10 | 140 | 20,172,800 | n = int(input())
a = [[1]*n]
y = 0
for i in range(n-1):
x = [1]
for i in range(n-1):
x.append(x[i]+a[y][i+1])
a.append(x)
y += 1
res = 0
for j in a:
if max(j) > res:
res = max(j)
print(res) | Title: Maximum in Table
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
An *n*<=×<=*n* table *a* is defined as follows:
- The first row and the first column contain ones, that is: *a**i*,<=1<==<=*a*1,<=*i*<==<=1 for all *i*<==<=1,<=2,<=...,<=*n*. - Each of the remaining numbers in the t... | ```python
n = int(input())
a = [[1]*n]
y = 0
for i in range(n-1):
x = [1]
for i in range(n-1):
x.append(x[i]+a[y][i+1])
a.append(x)
y += 1
res = 0
for j in a:
if max(j) > res:
res = max(j)
print(res)
``` | 3 | |
382 | A | Ksenia and Pan Scales | PROGRAMMING | 1,100 | [
"greedy",
"implementation"
] | null | null | Ksenia has ordinary pan scales and several weights of an equal mass. Ksenia has already put some weights on the scales, while other weights are untouched. Ksenia is now wondering whether it is possible to put all the remaining weights on the scales so that the scales were in equilibrium.
The scales is in equilibrium ... | The first line has a non-empty sequence of characters describing the scales. In this sequence, an uppercase English letter indicates a weight, and the symbol "|" indicates the delimiter (the character occurs in the sequence exactly once). All weights that are recorded in the sequence before the delimiter are initially ... | If you cannot put all the weights on the scales so that the scales were in equilibrium, print string "Impossible". Otherwise, print the description of the resulting scales, copy the format of the input.
If there are multiple answers, print any of them. | [
"AC|T\nL\n",
"|ABC\nXYZ\n",
"W|T\nF\n",
"ABC|\nD\n"
] | [
"AC|TL\n",
"XYZ|ABC\n",
"Impossible\n",
"Impossible\n"
] | none | 500 | [
{
"input": "AC|T\nL",
"output": "AC|TL"
},
{
"input": "|ABC\nXYZ",
"output": "XYZ|ABC"
},
{
"input": "W|T\nF",
"output": "Impossible"
},
{
"input": "ABC|\nD",
"output": "Impossible"
},
{
"input": "A|BC\nDEF",
"output": "ADF|BCE"
},
{
"input": "|\nABC",... | 1,611,380,297 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 61 | 307,200 | left, right = input().split('|')
ad = input()
no = 0
total_len = len(left) + len(right) + len(ad)
for i in range(total_len):
if total_len % 2 != 0:
print('Impossible')
exit()
if len(left) < len(right):
if len(left + ad[:i]) == len(right + ad[i:]):
left += ad[:i]
... | Title: Ksenia and Pan Scales
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Ksenia has ordinary pan scales and several weights of an equal mass. Ksenia has already put some weights on the scales, while other weights are untouched. Ksenia is now wondering whether it is possible to put all ... | ```python
left, right = input().split('|')
ad = input()
no = 0
total_len = len(left) + len(right) + len(ad)
for i in range(total_len):
if total_len % 2 != 0:
print('Impossible')
exit()
if len(left) < len(right):
if len(left + ad[:i]) == len(right + ad[i:]):
left += ... | 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... | 1,643,488,726 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 92 | 0 | in_str = input()
ups = [i for i in in_str if i.isupper()]
lows = [i for i in in_str if i.islower()]
if len(ups) > len(lows):
print(in_str.upper())
else:
print(in_str.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
in_str = input()
ups = [i for i in in_str if i.isupper()]
lows = [i for i in in_str if i.islower()]
if len(ups) > len(lows):
print(in_str.upper())
else:
print(in_str.lower())
``` | 3.977 |
115 | A | Party | PROGRAMMING | 900 | [
"dfs and similar",
"graphs",
"trees"
] | null | null | A company has *n* employees numbered from 1 to *n*. Each employee either has no immediate manager or exactly one immediate manager, who is another employee with a different number. An employee *A* is said to be the superior of another employee *B* if at least one of the following is true:
- Employee *A* is the immedi... | The first line contains integer *n* (1<=≤<=*n*<=≤<=2000) — the number of employees.
The next *n* lines contain the integers *p**i* (1<=≤<=*p**i*<=≤<=*n* or *p**i*<==<=-1). Every *p**i* denotes the immediate manager for the *i*-th employee. If *p**i* is -1, that means that the *i*-th employee does not have an immediate... | Print a single integer denoting the minimum number of groups that will be formed in the party. | [
"5\n-1\n1\n2\n1\n-1\n"
] | [
"3\n"
] | For the first example, three groups are sufficient, for example:
- Employee 1 - Employees 2 and 4 - Employees 3 and 5 | 500 | [
{
"input": "5\n-1\n1\n2\n1\n-1",
"output": "3"
},
{
"input": "4\n-1\n1\n2\n3",
"output": "4"
},
{
"input": "12\n-1\n1\n2\n3\n-1\n5\n6\n7\n-1\n9\n10\n11",
"output": "4"
},
{
"input": "6\n-1\n-1\n2\n3\n1\n1",
"output": "3"
},
{
"input": "3\n-1\n1\n1",
"output": ... | 1,696,706,212 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 38 | 280 | 1,331,200 | def get_trees_length(checked_nodes, managers, index, length):
checked_nodes.append(index)
p = managers[index]
if p == -1:
return length, checked_nodes
else:
length += 1
return get_trees_length(checked_nodes, managers, p-1, length)
if __name__=='__main__':
n = int(input())
while n < 0 or n > 2000... | Title: Party
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A company has *n* employees numbered from 1 to *n*. Each employee either has no immediate manager or exactly one immediate manager, who is another employee with a different number. An employee *A* is said to be the superior of an... | ```python
def get_trees_length(checked_nodes, managers, index, length):
checked_nodes.append(index)
p = managers[index]
if p == -1:
return length, checked_nodes
else:
length += 1
return get_trees_length(checked_nodes, managers, p-1, length)
if __name__=='__main__':
n = int(input())
while n < 0 o... | -1 | |
1 | A | Theatre Square | PROGRAMMING | 1,000 | [
"math"
] | A. Theatre Square | 1 | 256 | Theatre Square in the capital city of Berland has a rectangular shape with the size *n*<=×<=*m* meters. On the occasion of the city's anniversary, a decision was taken to pave the Square with square granite flagstones. Each flagstone is of the size *a*<=×<=*a*.
What is the least number of flagstones needed to pave the... | The input contains three positive integer numbers in the first line: *n*,<=<=*m* and *a* (1<=≤<=<=*n*,<=*m*,<=*a*<=≤<=109). | Write the needed number of flagstones. | [
"6 6 4\n"
] | [
"4\n"
] | none | 0 | [
{
"input": "6 6 4",
"output": "4"
},
{
"input": "1 1 1",
"output": "1"
},
{
"input": "2 1 1",
"output": "2"
},
{
"input": "1 2 1",
"output": "2"
},
{
"input": "2 2 1",
"output": "4"
},
{
"input": "2 1 2",
"output": "1"
},
{
"input": "1 1 3"... | 1,694,255,676 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 15 | 0 | a,b=map(int,input().split())
score=[int(x) for x in input().split()]
k=0
for i in range(a):
if score[i-1]>=score[b-1] and score[i-1]>0:
k+=1
print(k) | Title: Theatre Square
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Theatre Square in the capital city of Berland has a rectangular shape with the size *n*<=×<=*m* meters. On the occasion of the city's anniversary, a decision was taken to pave the Square with square granite flagstones. Each ... | ```python
a,b=map(int,input().split())
score=[int(x) for x in input().split()]
k=0
for i in range(a):
if score[i-1]>=score[b-1] and score[i-1]>0:
k+=1
print(k)
``` | -1 |
0 | none | none | none | 0 | [
"none"
] | null | null | For a vector $\vec{v} = (x, y)$, define $|v| = \sqrt{x^2 + y^2}$.
Allen had a bit too much to drink at the bar, which is at the origin. There are $n$ vectors $\vec{v_1}, \vec{v_2}, \cdots, \vec{v_n}$. Allen will make $n$ moves. As Allen's sense of direction is impaired, during the $i$-th move he will either move in th... | The first line contains a single integer $n$ ($1 \le n \le 10^5$) — the number of moves.
Each of the following lines contains two space-separated integers $x_i$ and $y_i$, meaning that $\vec{v_i} = (x_i, y_i)$. We have that $|v_i| \le 10^6$ for all $i$. | Output a single line containing $n$ integers $c_1, c_2, \cdots, c_n$, each of which is either $1$ or $-1$. Your solution is correct if the value of $p = \sum_{i = 1}^n c_i \vec{v_i}$, satisfies $|p| \le 1.5 \cdot 10^6$.
It can be shown that a solution always exists under the given constraints. | [
"3\n999999 0\n0 999999\n999999 0\n",
"1\n-824590 246031\n",
"8\n-67761 603277\n640586 -396671\n46147 -122580\n569609 -2112\n400 914208\n131792 309779\n-850150 -486293\n5272 721899\n"
] | [
"1 1 -1 \n",
"1 \n",
"1 1 1 1 1 1 1 -1 \n"
] | none | 0 | [
{
"input": "3\n999999 0\n0 999999\n999999 0",
"output": "1 1 -1 "
},
{
"input": "1\n-824590 246031",
"output": "1 "
},
{
"input": "8\n-67761 603277\n640586 -396671\n46147 -122580\n569609 -2112\n400 914208\n131792 309779\n-850150 -486293\n5272 721899",
"output": "1 1 1 1 1 1 1 -1 "
... | 1,691,789,672 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 0 | 46 | 0 | print("_RANDOM_GUESS_1691789672.8247426")# 1691789672.8247585 | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
For a vector $\vec{v} = (x, y)$, define $|v| = \sqrt{x^2 + y^2}$.
Allen had a bit too much to drink at the bar, which is at the origin. There are $n$ vectors $\vec{v_1}, \vec{v_2}, \cdots, \vec{v_n}$. Allen will make $n$ moves. A... | ```python
print("_RANDOM_GUESS_1691789672.8247426")# 1691789672.8247585
``` | 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... | 1,687,130,683 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 7 | 62 | 0 | bor=input()
num=[]
current=0
for x in range(len(bor)):
if current>x:
continue
if bor[current]=="-" and bor[current+1]==".":
num.append("1")
current+=2
if bor[current]=="-" and bor[current+1]=="-":
num.append("2")
current+=2
else:
num.append("0")
... | 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
bor=input()
num=[]
current=0
for x in range(len(bor)):
if current>x:
continue
if bor[current]=="-" and bor[current+1]==".":
num.append("1")
current+=2
if bor[current]=="-" and bor[current+1]=="-":
num.append("2")
current+=2
else:
num.appe... | -1 |
770 | A | New Password | PROGRAMMING | 800 | [
"*special",
"implementation"
] | null | null | Innokentiy decides to change the password in the social net "Contact!", but he is too lazy to invent a new password by himself. That is why he needs your help.
Innokentiy decides that new password should satisfy the following conditions:
- the length of the password must be equal to *n*, - the password should cons... | The first line contains two positive integers *n* and *k* (2<=≤<=*n*<=≤<=100, 2<=≤<=*k*<=≤<=*min*(*n*,<=26)) — the length of the password and the number of distinct symbols in it.
Pay attention that a desired new password always exists. | Print any password which satisfies all conditions given by Innokentiy. | [
"4 3\n",
"6 6\n",
"5 2\n"
] | [
"java\n",
"python\n",
"phphp\n"
] | In the first test there is one of the appropriate new passwords — java, because its length is equal to 4 and 3 distinct lowercase letters a, j and v are used in it.
In the second test there is one of the appropriate new passwords — python, because its length is equal to 6 and it consists of 6 distinct lowercase letter... | 500 | [
{
"input": "4 3",
"output": "abca"
},
{
"input": "6 6",
"output": "abcdef"
},
{
"input": "5 2",
"output": "ababa"
},
{
"input": "3 2",
"output": "aba"
},
{
"input": "10 2",
"output": "ababababab"
},
{
"input": "26 13",
"output": "abcdefghijklmabcde... | 1,664,637,125 | 2,147,483,647 | Python 3 | OK | TESTS | 47 | 46 | 0 | import random
n,r =map(int,(input().split()))
x=''
i=0
simple_list= list(map(chr, range(97, 97+r)))
while len(x) < n:
x=x+simple_list[i]
i+=1
if(i==r):
i=0
print(x) | Title: New Password
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Innokentiy decides to change the password in the social net "Contact!", but he is too lazy to invent a new password by himself. That is why he needs your help.
Innokentiy decides that new password should satisfy the foll... | ```python
import random
n,r =map(int,(input().split()))
x=''
i=0
simple_list= list(map(chr, range(97, 97+r)))
while len(x) < n:
x=x+simple_list[i]
i+=1
if(i==r):
i=0
print(x)
``` | 3 | |
43 | A | Football | PROGRAMMING | 1,000 | [
"strings"
] | A. Football | 2 | 256 | One day Vasya decided to have a look at the results of Berland 1910 Football Championship’s finals. Unfortunately he didn't find the overall score of the match; however, he got hold of a profound description of the match's process. On the whole there are *n* lines in that description each of which described one goal. E... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=100) — the number of lines in the description. Then follow *n* lines — for each goal the names of the teams that scored it. The names are non-empty lines consisting of uppercase Latin letters whose lengths do not exceed 10 symbols. It is guaranteed that the match di... | Print the name of the winning team. We remind you that in football the team that scores more goals is considered the winner. | [
"1\nABC\n",
"5\nA\nABA\nABA\nA\nA\n"
] | [
"ABC\n",
"A\n"
] | none | 500 | [
{
"input": "1\nABC",
"output": "ABC"
},
{
"input": "5\nA\nABA\nABA\nA\nA",
"output": "A"
},
{
"input": "2\nXTSJEP\nXTSJEP",
"output": "XTSJEP"
},
{
"input": "3\nXZYDJAEDZ\nXZYDJAEDZ\nXZYDJAEDZ",
"output": "XZYDJAEDZ"
},
{
"input": "3\nQCCYXL\nQCCYXL\nAXGLFQDD",
... | 1,657,058,276 | 2,147,483,647 | Python 3 | OK | TESTS | 34 | 92 | 0 | a = int(input())
b = input()
b1 = 1
c = ''
c1 = 0
h = None
for i in range(a-1):
h = input()
if h == b:
b1 += 1
else:
c = h
c1 += 1
if b1>c1:
print(b)
else:
print(c) | Title: Football
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
One day Vasya decided to have a look at the results of Berland 1910 Football Championship’s finals. Unfortunately he didn't find the overall score of the match; however, he got hold of a profound description of the match's process... | ```python
a = int(input())
b = input()
b1 = 1
c = ''
c1 = 0
h = None
for i in range(a-1):
h = input()
if h == b:
b1 += 1
else:
c = h
c1 += 1
if b1>c1:
print(b)
else:
print(c)
``` | 3.977 |
567 | A | Lineland Mail | PROGRAMMING | 900 | [
"greedy",
"implementation"
] | null | null | All cities of Lineland are located on the *Ox* coordinate axis. Thus, each city is associated with its position *x**i* — a coordinate on the *Ox* axis. No two cities are located at a single point.
Lineland residents love to send letters to each other. A person may send a letter only if the recipient lives in another c... | The first line of the input contains integer *n* (2<=≤<=*n*<=≤<=105) — the number of cities in Lineland. The second line contains the sequence of *n* distinct integers *x*1,<=*x*2,<=...,<=*x**n* (<=-<=109<=≤<=*x**i*<=≤<=109), where *x**i* is the *x*-coordinate of the *i*-th city. All the *x**i*'s are distinct and follo... | Print *n* lines, the *i*-th line must contain two integers *min**i*,<=*max**i*, separated by a space, where *min**i* is the minimum cost of sending a letter from the *i*-th city, and *max**i* is the maximum cost of sending a letter from the *i*-th city. | [
"4\n-5 -2 2 7\n",
"2\n-1 1\n"
] | [
"3 12\n3 9\n4 7\n5 12\n",
"2 2\n2 2\n"
] | none | 500 | [
{
"input": "4\n-5 -2 2 7",
"output": "3 12\n3 9\n4 7\n5 12"
},
{
"input": "2\n-1 1",
"output": "2 2\n2 2"
},
{
"input": "3\n-1 0 1",
"output": "1 2\n1 1\n1 2"
},
{
"input": "4\n-1 0 1 3",
"output": "1 4\n1 3\n1 2\n2 4"
},
{
"input": "3\n-1000000000 0 1000000000",
... | 1,609,224,871 | 2,147,483,647 | PyPy 3 | OK | TESTS | 54 | 436 | 11,980,800 | n = int(input())
x = list(map(int, input().split()))
q = 1000000000
for i in range(n):
biggest = 0
smallest = 0
if i == 0:
biggest = (x[-1] + q) - (x[i] + q)
smallest = (x[i + 1] + q) - (x[0] + q)
elif i == n-1:
biggest = (x[-1] + q) - (x[0] + q)
smallest = (x[... | Title: Lineland Mail
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
All cities of Lineland are located on the *Ox* coordinate axis. Thus, each city is associated with its position *x**i* — a coordinate on the *Ox* axis. No two cities are located at a single point.
Lineland residents love... | ```python
n = int(input())
x = list(map(int, input().split()))
q = 1000000000
for i in range(n):
biggest = 0
smallest = 0
if i == 0:
biggest = (x[-1] + q) - (x[i] + q)
smallest = (x[i + 1] + q) - (x[0] + q)
elif i == n-1:
biggest = (x[-1] + q) - (x[0] + q)
smal... | 3 | |
94 | A | Restoring Password | PROGRAMMING | 900 | [
"implementation",
"strings"
] | A. Restoring Password | 2 | 256 | Igor K. always used to trust his favorite Kashpirovsky Antivirus. That is why he didn't hesitate to download the link one of his groupmates sent him via QIP Infinium. The link was said to contain "some real funny stuff about swine influenza". The antivirus had no objections and Igor K. run the flash application he had ... | The input data contains 11 lines. The first line represents the binary code 80 characters in length. That is the code written in Igor K.'s ISQ account's info. Next 10 lines contain pairwise distinct binary codes 10 characters in length, corresponding to numbers 0, 1, ..., 9. | Print one line containing 8 characters — The password to Igor K.'s ISQ account. It is guaranteed that the solution exists. | [
"01001100100101100000010110001001011001000101100110010110100001011010100101101100\n0100110000\n0100110010\n0101100000\n0101100010\n0101100100\n0101100110\n0101101000\n0101101010\n0101101100\n0101101110\n",
"10101101111001000010100100011010101101110010110111011000100011011110010110001000\n1001000010\n1101111001\n1... | [
"12345678\n",
"30234919\n"
] | none | 500 | [
{
"input": "01001100100101100000010110001001011001000101100110010110100001011010100101101100\n0100110000\n0100110010\n0101100000\n0101100010\n0101100100\n0101100110\n0101101000\n0101101010\n0101101100\n0101101110",
"output": "12345678"
},
{
"input": "1010110111100100001010010001101010110111001011011... | 1,497,112,640 | 2,147,483,647 | Python 3 | OK | TESTS | 50 | 124 | 0 | ISQ = input()
i = 0
numbers = {}
while i < 10:
numbers[input()] = i
i += 1
ISQpart = []
for i in range(0, len(ISQ),10):
num = ""
for j in range(i, i+10):
num += ISQ[j]
ISQpart += [num ,]
pword = ""
for i in ISQpart:
if i in numbers:
pword += str(numbers[i])
print(pword)
| Title: Restoring Password
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Igor K. always used to trust his favorite Kashpirovsky Antivirus. That is why he didn't hesitate to download the link one of his groupmates sent him via QIP Infinium. The link was said to contain "some real funny stuff a... | ```python
ISQ = input()
i = 0
numbers = {}
while i < 10:
numbers[input()] = i
i += 1
ISQpart = []
for i in range(0, len(ISQ),10):
num = ""
for j in range(i, i+10):
num += ISQ[j]
ISQpart += [num ,]
pword = ""
for i in ISQpart:
if i in numbers:
pword += str(numbers[i])
print(pword... | 3.969 |
903 | D | Almost Difference | PROGRAMMING | 2,200 | [
"data structures",
"math"
] | null | null | Let's denote a function
You are given an array *a* consisting of *n* integers. You have to calculate the sum of *d*(*a**i*,<=*a**j*) over all pairs (*i*,<=*j*) such that 1<=≤<=*i*<=≤<=*j*<=≤<=*n*. | The first line contains one integer *n* (1<=≤<=*n*<=≤<=200000) — the number of elements in *a*.
The second line contains *n* integers *a*1, *a*2, ..., *a**n* (1<=≤<=*a**i*<=≤<=109) — elements of the array. | Print one integer — the sum of *d*(*a**i*,<=*a**j*) over all pairs (*i*,<=*j*) such that 1<=≤<=*i*<=≤<=*j*<=≤<=*n*. | [
"5\n1 2 3 1 3\n",
"4\n6 6 5 5\n",
"4\n6 6 4 4\n"
] | [
"4\n",
"0\n",
"-8\n"
] | In the first example:
1. *d*(*a*<sub class="lower-index">1</sub>, *a*<sub class="lower-index">2</sub>) = 0; 1. *d*(*a*<sub class="lower-index">1</sub>, *a*<sub class="lower-index">3</sub>) = 2; 1. *d*(*a*<sub class="lower-index">1</sub>, *a*<sub class="lower-index">4</sub>) = 0; 1. *d*(*a*<sub class="lower-index">... | 0 | [
{
"input": "5\n1 2 3 1 3",
"output": "4"
},
{
"input": "4\n6 6 5 5",
"output": "0"
},
{
"input": "4\n6 6 4 4",
"output": "-8"
},
{
"input": "1\n1",
"output": "0"
},
{
"input": "1\n1000000000",
"output": "0"
},
{
"input": "2\n1 1000000000",
"output"... | 1,653,809,363 | 2,963 | PyPy 3-64 | OK | TESTS | 45 | 482 | 36,249,600 | from sys import stdin
import math
import itertools
from functools import reduce
from decimal import Decimal
# = stdin.readline().rstrip()
# = [x for x in stdin.readline().rstrip().split()]
# = int(stdin.readline().rstrip())
# = [int(x) for x in stdin.readline().rstrip().split()]
n = int(stdin.readline().rstr... | Title: Almost Difference
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Let's denote a function
You are given an array *a* consisting of *n* integers. You have to calculate the sum of *d*(*a**i*,<=*a**j*) over all pairs (*i*,<=*j*) such that 1<=≤<=*i*<=≤<=*j*<=≤<=*n*.
Input Specifica... | ```python
from sys import stdin
import math
import itertools
from functools import reduce
from decimal import Decimal
# = stdin.readline().rstrip()
# = [x for x in stdin.readline().rstrip().split()]
# = int(stdin.readline().rstrip())
# = [int(x) for x in stdin.readline().rstrip().split()]
n = int(stdin.readl... | 3 | |
617 | A | Elephant | PROGRAMMING | 800 | [
"math"
] | null | null | An elephant decided to visit his friend. It turned out that the elephant's house is located at point 0 and his friend's house is located at point *x*(*x*<=><=0) of the coordinate line. In one step the elephant can move 1, 2, 3, 4 or 5 positions forward. Determine, what is the minimum number of steps he need to make ... | The first line of the input contains an integer *x* (1<=≤<=*x*<=≤<=1<=000<=000) — The coordinate of the friend's house. | Print the minimum number of steps that elephant needs to make to get from point 0 to point *x*. | [
"5\n",
"12\n"
] | [
"1\n",
"3\n"
] | In the first sample the elephant needs to make one step of length 5 to reach the point *x*.
In the second sample the elephant can get to point *x* if he moves by 3, 5 and 4. There are other ways to get the optimal answer but the elephant cannot reach *x* in less than three moves. | 500 | [
{
"input": "5",
"output": "1"
},
{
"input": "12",
"output": "3"
},
{
"input": "999999",
"output": "200000"
},
{
"input": "41",
"output": "9"
},
{
"input": "1000000",
"output": "200000"
},
{
"input": "1",
"output": "1"
},
{
"input": "2",
... | 1,698,749,637 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | m=int(input())
print(m//5+1) | Title: Elephant
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
An elephant decided to visit his friend. It turned out that the elephant's house is located at point 0 and his friend's house is located at point *x*(*x*<=><=0) of the coordinate line. In one step the elephant can move 1, 2... | ```python
m=int(input())
print(m//5+1)
``` | 0 | |
49 | A | Sleuth | PROGRAMMING | 800 | [
"implementation"
] | A. Sleuth | 2 | 256 | Vasya plays the sleuth with his friends. The rules of the game are as follows: those who play for the first time, that is Vasya is the sleuth, he should investigate a "crime" and find out what is happening. He can ask any questions whatsoever that can be answered with "Yes" or "No". All the rest agree beforehand to ans... | The single line contains a question represented by a non-empty line consisting of large and small Latin letters, spaces and a question mark. The line length does not exceed 100. It is guaranteed that the question mark occurs exactly once in the line — as the last symbol and that the line contains at least one letter. | Print answer for the question in a single line: YES if the answer is "Yes", NO if the answer is "No".
Remember that in the reply to the question the last letter, not the last character counts. I. e. the spaces and the question mark do not count as letters. | [
"Is it a melon?\n",
"Is it an apple?\n",
"Is it a banana ?\n",
"Is it an apple and a banana simultaneouSLY?\n"
] | [
"NO\n",
"YES\n",
"YES\n",
"YES\n"
] | none | 500 | [
{
"input": "Is it a melon?",
"output": "NO"
},
{
"input": "Is it an apple?",
"output": "YES"
},
{
"input": " Is it a banana ?",
"output": "YES"
},
{
"input": "Is it an apple and a banana simultaneouSLY?",
"output": "YES"
},
{
"input": "oHtSbDwzHb?",
... | 1,633,443,693 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 2 | 122 | 0 | qst=input()
qst.strip()
vowels="AEIOUYaeiouy"
if qst[-2] in vowels:
print("YES")
else:
print("NO") | Title: Sleuth
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya plays the sleuth with his friends. The rules of the game are as follows: those who play for the first time, that is Vasya is the sleuth, he should investigate a "crime" and find out what is happening. He can ask any questions ... | ```python
qst=input()
qst.strip()
vowels="AEIOUYaeiouy"
if qst[-2] in vowels:
print("YES")
else:
print("NO")
``` | 0 |
17 | A | Noldbach problem | PROGRAMMING | 1,000 | [
"brute force",
"math",
"number theory"
] | A. Noldbach problem | 2 | 64 | Nick is interested in prime numbers. Once he read about Goldbach problem. It states that every even integer greater than 2 can be expressed as the sum of two primes. That got Nick's attention and he decided to invent a problem of his own and call it Noldbach problem. Since Nick is interested only in prime numbers, Nold... | The first line of the input contains two integers *n* (2<=≤<=*n*<=≤<=1000) and *k* (0<=≤<=*k*<=≤<=1000). | Output YES if at least *k* prime numbers from 2 to *n* inclusively can be expressed as it was described above. Otherwise output NO. | [
"27 2\n",
"45 7\n"
] | [
"YES",
"NO"
] | In the first sample the answer is YES since at least two numbers can be expressed as it was described (for example, 13 and 19). In the second sample the answer is NO since it is impossible to express 7 prime numbers from 2 to 45 in the desired form. | 0 | [
{
"input": "27 2",
"output": "YES"
},
{
"input": "45 7",
"output": "NO"
},
{
"input": "2 0",
"output": "YES"
},
{
"input": "15 1",
"output": "YES"
},
{
"input": "17 1",
"output": "YES"
},
{
"input": "34 5",
"output": "NO"
},
{
"input": "37 ... | 1,526,909,596 | 2,147,483,647 | Python 3 | OK | TESTS | 35 | 186 | 0 | n = input().split()
k = int(n[1])
n = int(n[0])
f = [True] * 1001
for i in range(2,1001):
for j in range(2,1000//i+1):
f[i*j] = False
a =[]
for i in range(2,1001):
if f[i]:
a.append(i)
fl = [False] * 2001
t = 0
for i in a[1::]:
t+=1
fl[a[t]+a[t-1]+1] = True
res = 0
for i... | Title: Noldbach problem
Time Limit: 2 seconds
Memory Limit: 64 megabytes
Problem Description:
Nick is interested in prime numbers. Once he read about Goldbach problem. It states that every even integer greater than 2 can be expressed as the sum of two primes. That got Nick's attention and he decided to invent a prob... | ```python
n = input().split()
k = int(n[1])
n = int(n[0])
f = [True] * 1001
for i in range(2,1001):
for j in range(2,1000//i+1):
f[i*j] = False
a =[]
for i in range(2,1001):
if f[i]:
a.append(i)
fl = [False] * 2001
t = 0
for i in a[1::]:
t+=1
fl[a[t]+a[t-1]+1] = True
res ... | 3.9535 |
260 | A | Adding Digits | PROGRAMMING | 1,400 | [
"implementation",
"math"
] | null | null | Vasya has got two number: *a* and *b*. However, Vasya finds number *a* too short. So he decided to repeat the operation of lengthening number *a* *n* times.
One operation of lengthening a number means adding exactly one digit to the number (in the decimal notation) to the right provided that the resulting number is di... | The first line contains three integers: *a*,<=*b*,<=*n* (1<=≤<=*a*,<=*b*,<=*n*<=≤<=105). | In a single line print the integer without leading zeros, which Vasya can get when he applies the lengthening operations to number *a* *n* times. If no such number exists, then print number -1. If there are multiple possible answers, print any of them. | [
"5 4 5\n",
"12 11 1\n",
"260 150 10\n"
] | [
"524848\n",
"121\n",
"-1\n"
] | none | 500 | [
{
"input": "5 4 5",
"output": "524848"
},
{
"input": "12 11 1",
"output": "121"
},
{
"input": "260 150 10",
"output": "-1"
},
{
"input": "78843 5684 42717",
"output": "-1"
},
{
"input": "93248 91435 1133",
"output": "-1"
},
{
"input": "100000 10 64479"... | 1,637,242,808 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 21 | 62 | 204,800 | a,b,n = [int(x) for x in input().split()]
# arr = ['0' for i in range(n)]
s = ''
for i in range(n):
s += '0'
if a%b == 0:
print(str(a) + s)
else:
x = (a*10)//b
t = (x+1)*b - a*10
if t <= 9:
print(str(a) +str(t)+ s[:n-1])
else:
print(-1) | Title: Adding Digits
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya has got two number: *a* and *b*. However, Vasya finds number *a* too short. So he decided to repeat the operation of lengthening number *a* *n* times.
One operation of lengthening a number means adding exactly one ... | ```python
a,b,n = [int(x) for x in input().split()]
# arr = ['0' for i in range(n)]
s = ''
for i in range(n):
s += '0'
if a%b == 0:
print(str(a) + s)
else:
x = (a*10)//b
t = (x+1)*b - a*10
if t <= 9:
print(str(a) +str(t)+ s[:n-1])
else:
print(-1)
``` | 0 | |
841 | B | Godsend | PROGRAMMING | 1,100 | [
"games",
"math"
] | null | null | Leha somehow found an array consisting of *n* integers. Looking at it, he came up with a task. Two players play the game on the array. Players move one by one. The first player can choose for his move a subsegment of non-zero length with an odd sum of numbers and remove it from the array, after that the remaining parts... | First line of input data contains single integer *n* (1<=≤<=*n*<=≤<=106) — length of the array.
Next line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (0<=≤<=*a**i*<=≤<=109). | Output answer in single line. "First", if first player wins, and "Second" otherwise (without quotes). | [
"4\n1 3 2 3\n",
"2\n2 2\n"
] | [
"First\n",
"Second\n"
] | In first sample first player remove whole array in one move and win.
In second sample first player can't make a move and lose. | 1,000 | [
{
"input": "4\n1 3 2 3",
"output": "First"
},
{
"input": "2\n2 2",
"output": "Second"
},
{
"input": "4\n2 4 6 8",
"output": "Second"
},
{
"input": "5\n1 1 1 1 1",
"output": "First"
},
{
"input": "4\n720074544 345031254 849487632 80870826",
"output": "Second"
... | 1,597,903,888 | 2,147,483,647 | PyPy 3 | OK | TESTS | 88 | 1,107 | 81,510,400 | n=int(input())
a=list(map(int, input().split()))
if sum(a)%2!=0:
print('First')
else:
test=0
for i in a:
if i%2!=0:
test=1
break
if not test:
print('Second')
else:
print('First') | Title: Godsend
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Leha somehow found an array consisting of *n* integers. Looking at it, he came up with a task. Two players play the game on the array. Players move one by one. The first player can choose for his move a subsegment of non-zero l... | ```python
n=int(input())
a=list(map(int, input().split()))
if sum(a)%2!=0:
print('First')
else:
test=0
for i in a:
if i%2!=0:
test=1
break
if not test:
print('Second')
else:
print('First')
``` | 3 | |
577 | A | Multiplication Table | PROGRAMMING | 1,000 | [
"implementation",
"number theory"
] | null | null | Let's consider a table consisting of *n* rows and *n* columns. The cell located at the intersection of *i*-th row and *j*-th column contains number *i*<=×<=*j*. The rows and columns are numbered starting from 1.
You are given a positive integer *x*. Your task is to count the number of cells in a table that contain num... | The single line contains numbers *n* and *x* (1<=≤<=*n*<=≤<=105, 1<=≤<=*x*<=≤<=109) — the size of the table and the number that we are looking for in the table. | Print a single number: the number of times *x* occurs in the table. | [
"10 5\n",
"6 12\n",
"5 13\n"
] | [
"2\n",
"4\n",
"0\n"
] | A table for the second sample test is given below. The occurrences of number 12 are marked bold. | 500 | [
{
"input": "10 5",
"output": "2"
},
{
"input": "6 12",
"output": "4"
},
{
"input": "5 13",
"output": "0"
},
{
"input": "1 1",
"output": "1"
},
{
"input": "2 1",
"output": "1"
},
{
"input": "100000 1",
"output": "1"
},
{
"input": "1 10000000... | 1,641,576,248 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 1 | 62 | 0 | import math
n, x = map(int, input().split())
a = []
l = math.ceil(math.sqrt(x))
for i in range(1, l+1):
if x % i == 0:
a.append([i, x//i])
ans = 0
for i in a:
if i[0] <= n and i[1] <= n:
if i[0] == i[1]:
ans += 1
else:
ans += 2
print(ans) | Title: Multiplication Table
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Let's consider a table consisting of *n* rows and *n* columns. The cell located at the intersection of *i*-th row and *j*-th column contains number *i*<=×<=*j*. The rows and columns are numbered starting from 1.
Y... | ```python
import math
n, x = map(int, input().split())
a = []
l = math.ceil(math.sqrt(x))
for i in range(1, l+1):
if x % i == 0:
a.append([i, x//i])
ans = 0
for i in a:
if i[0] <= n and i[1] <= n:
if i[0] == i[1]:
ans += 1
else:
ans += 2
print(an... | 0 | |
26 | A | Almost Prime | PROGRAMMING | 900 | [
"number theory"
] | A. Almost Prime | 2 | 256 | A number is called almost prime if it has exactly two distinct prime divisors. For example, numbers 6, 18, 24 are almost prime, while 4, 8, 9, 42 are not. Find the amount of almost prime numbers which are between 1 and *n*, inclusive. | Input contains one integer number *n* (1<=≤<=*n*<=≤<=3000). | Output the amount of almost prime numbers between 1 and *n*, inclusive. | [
"10\n",
"21\n"
] | [
"2\n",
"8\n"
] | none | 500 | [
{
"input": "10",
"output": "2"
},
{
"input": "21",
"output": "8"
},
{
"input": "1",
"output": "0"
},
{
"input": "2",
"output": "0"
},
{
"input": "4",
"output": "0"
},
{
"input": "3",
"output": "0"
},
{
"input": "8",
"output": "1"
},
... | 1,667,393,284 | 2,147,483,647 | PyPy 3 | OK | TESTS | 23 | 154 | 2,048,000 | import math
def check(x: int):
if (x < 2):
return False
counter = 0
p = 2
while (x > 1):
divided = False
while (x % p == 0):
divided = True
x //= p
p += 1
if (divided == True):
... | Title: Almost Prime
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
A number is called almost prime if it has exactly two distinct prime divisors. For example, numbers 6, 18, 24 are almost prime, while 4, 8, 9, 42 are not. Find the amount of almost prime numbers which are between 1 and *n*, in... | ```python
import math
def check(x: int):
if (x < 2):
return False
counter = 0
p = 2
while (x > 1):
divided = False
while (x % p == 0):
divided = True
x //= p
p += 1
if (divided == Tr... | 3.957685 |
670 | A | Holidays | PROGRAMMING | 900 | [
"brute force",
"constructive algorithms",
"greedy",
"math"
] | null | null | On the planet Mars a year lasts exactly *n* days (there are no leap years on Mars). But Martians have the same weeks as earthlings — 5 work days and then 2 days off. Your task is to determine the minimum possible and the maximum possible number of days off per year on Mars. | The first line of the input contains a positive integer *n* (1<=≤<=*n*<=≤<=1<=000<=000) — the number of days in a year on Mars. | Print two integers — the minimum possible and the maximum possible number of days off per year on Mars. | [
"14\n",
"2\n"
] | [
"4 4\n",
"0 2\n"
] | In the first sample there are 14 days in a year on Mars, and therefore independently of the day a year starts with there will be exactly 4 days off .
In the second sample there are only 2 days in a year on Mars, and they can both be either work days or days off. | 500 | [
{
"input": "14",
"output": "4 4"
},
{
"input": "2",
"output": "0 2"
},
{
"input": "1",
"output": "0 1"
},
{
"input": "3",
"output": "0 2"
},
{
"input": "4",
"output": "0 2"
},
{
"input": "5",
"output": "0 2"
},
{
"input": "6",
"output":... | 1,685,720,917 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 198 | 77 | 0 | n=int(input())
print(2*(n//7)+(n%7)//6,2*((n+5)//7)+((n+5)%7)//6) | Title: Holidays
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
On the planet Mars a year lasts exactly *n* days (there are no leap years on Mars). But Martians have the same weeks as earthlings — 5 work days and then 2 days off. Your task is to determine the minimum possible and the maxim... | ```python
n=int(input())
print(2*(n//7)+(n%7)//6,2*((n+5)//7)+((n+5)%7)//6)
``` | 3 | |
867 | A | Between the Offices | PROGRAMMING | 800 | [
"implementation"
] | null | null | As you may know, MemSQL has American offices in both San Francisco and Seattle. Being a manager in the company, you travel a lot between the two cities, always by plane.
You prefer flying from Seattle to San Francisco than in the other direction, because it's warmer in San Francisco. You are so busy that you don't rem... | The first line of input contains single integer *n* (2<=≤<=*n*<=≤<=100) — the number of days.
The second line contains a string of length *n* consisting of only capital 'S' and 'F' letters. If the *i*-th letter is 'S', then you were in Seattle office on that day. Otherwise you were in San Francisco. The days are given... | Print "YES" if you flew more times from Seattle to San Francisco, and "NO" otherwise.
You can print each letter in any case (upper or lower). | [
"4\nFSSF\n",
"2\nSF\n",
"10\nFFFFFFFFFF\n",
"10\nSSFFSFFSFF\n"
] | [
"NO\n",
"YES\n",
"NO\n",
"YES\n"
] | In the first example you were initially at San Francisco, then flew to Seattle, were there for two days and returned to San Francisco. You made one flight in each direction, so the answer is "NO".
In the second example you just flew from Seattle to San Francisco, so the answer is "YES".
In the third example you staye... | 500 | [
{
"input": "4\nFSSF",
"output": "NO"
},
{
"input": "2\nSF",
"output": "YES"
},
{
"input": "10\nFFFFFFFFFF",
"output": "NO"
},
{
"input": "10\nSSFFSFFSFF",
"output": "YES"
},
{
"input": "20\nSFSFFFFSSFFFFSSSSFSS",
"output": "NO"
},
{
"input": "20\nSSFFF... | 1,588,131,923 | 2,147,483,647 | PyPy 3 | OK | TESTS | 34 | 140 | 0 | list = []
i = 0
seattle = 0
francisco = 0
n = int(input())
s = input()
for char in s:
list.append(char)
while i < len(s) - 1 :
if list[i] == "S" and list[i+1] == "F":
seattle += 1
elif list[i] == "F" and list[i+1] == "S":
francisco += 1
i += 1
if seattle > francisco:
print("YES")
els... | Title: Between the Offices
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
As you may know, MemSQL has American offices in both San Francisco and Seattle. Being a manager in the company, you travel a lot between the two cities, always by plane.
You prefer flying from Seattle to San Franci... | ```python
list = []
i = 0
seattle = 0
francisco = 0
n = int(input())
s = input()
for char in s:
list.append(char)
while i < len(s) - 1 :
if list[i] == "S" and list[i+1] == "F":
seattle += 1
elif list[i] == "F" and list[i+1] == "S":
francisco += 1
i += 1
if seattle > francisco:
print("... | 3 | |
0 | none | none | none | 0 | [
"none"
] | null | null | Bike is interested in permutations. A permutation of length *n* is an integer sequence such that each integer from 0 to (*n*<=-<=1) appears exactly once in it. For example, [0,<=2,<=1] is a permutation of length 3 while both [0,<=2,<=2] and [1,<=2,<=3] is not.
A permutation triple of permutations of length *n* (*a*,<=... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=105). | If no Lucky Permutation Triple of length *n* exists print -1.
Otherwise, you need to print three lines. Each line contains *n* space-seperated integers. The first line must contain permutation *a*, the second line — permutation *b*, the third — permutation *c*.
If there are multiple solutions, print any of them. | [
"5\n",
"2\n"
] | [
"1 4 3 2 0\n1 0 2 4 3\n2 4 0 1 3\n",
"-1\n"
] | In Sample 1, the permutation triple ([1, 4, 3, 2, 0], [1, 0, 2, 4, 3], [2, 4, 0, 1, 3]) is Lucky Permutation Triple, as following holds:
- <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/a6bf1b9b57809dbec5021f65f89616f259587c07.png" style="max-width: 100.0%;max-height: 100.0%;"/>; - <img... | 0 | [
{
"input": "5",
"output": "1 4 3 2 0\n1 0 2 4 3\n2 4 0 1 3"
},
{
"input": "2",
"output": "-1"
},
{
"input": "8",
"output": "-1"
},
{
"input": "9",
"output": "0 1 2 3 4 5 6 7 8 \n0 1 2 3 4 5 6 7 8 \n0 2 4 6 8 1 3 5 7 "
},
{
"input": "2",
"output": "-1"
},
{... | 1,628,058,973 | 2,147,483,647 | PyPy 3 | OK | TESTS | 54 | 560 | 33,587,200 | # link: https://codeforces.com/contest/304/problem/C
for _ in range(1):
n = int(input())
a = [i for i in range(n)]
b = [i for i in range(1,n)]
b.append(0)
visited = set()
c = [0 for i in range(n)]
for i in range(n):
temp_sum = a[i] + b[i]
num = temp_sum % n
... | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Bike is interested in permutations. A permutation of length *n* is an integer sequence such that each integer from 0 to (*n*<=-<=1) appears exactly once in it. For example, [0,<=2,<=1] is a permutation of length 3 while both [0,<=... | ```python
# link: https://codeforces.com/contest/304/problem/C
for _ in range(1):
n = int(input())
a = [i for i in range(n)]
b = [i for i in range(1,n)]
b.append(0)
visited = set()
c = [0 for i in range(n)]
for i in range(n):
temp_sum = a[i] + b[i]
num = temp_sum ... | 3 | |
451 | B | Sort the Array | PROGRAMMING | 1,300 | [
"implementation",
"sortings"
] | null | null | Being a programmer, you like arrays a lot. For your birthday, your friends have given you an array *a* consisting of *n* distinct integers.
Unfortunately, the size of *a* is too small. You want a bigger array! Your friends agree to give you a bigger array, but only if you are able to answer the following question corr... | The first line of the input contains an integer *n* (1<=≤<=*n*<=≤<=105) — the size of array *a*.
The second line contains *n* distinct space-separated integers: *a*[1],<=*a*[2],<=...,<=*a*[*n*] (1<=≤<=*a*[*i*]<=≤<=109). | Print "yes" or "no" (without quotes), depending on the answer.
If your answer is "yes", then also print two space-separated integers denoting start and end (start must not be greater than end) indices of the segment to be reversed. If there are multiple ways of selecting these indices, print any of them. | [
"3\n3 2 1\n",
"4\n2 1 3 4\n",
"4\n3 1 2 4\n",
"2\n1 2\n"
] | [
"yes\n1 3\n",
"yes\n1 2\n",
"no\n",
"yes\n1 1\n"
] | Sample 1. You can reverse the entire array to get [1, 2, 3], which is sorted.
Sample 3. No segment can be reversed such that the array will be sorted.
Definitions
A segment [*l*, *r*] of array *a* is the sequence *a*[*l*], *a*[*l* + 1], ..., *a*[*r*].
If you have an array *a* of size *n* and you reverse its segment... | 1,000 | [
{
"input": "3\n3 2 1",
"output": "yes\n1 3"
},
{
"input": "4\n2 1 3 4",
"output": "yes\n1 2"
},
{
"input": "4\n3 1 2 4",
"output": "no"
},
{
"input": "2\n1 2",
"output": "yes\n1 1"
},
{
"input": "2\n58 4",
"output": "yes\n1 2"
},
{
"input": "5\n69 37 2... | 1,677,527,661 | 2,147,483,647 | PyPy 3-64 | RUNTIME_ERROR | TESTS | 0 | 77 | 2,867,200 | n = int(input())
l = [int(x) for x in input().split()]
l2 = l.copy()
l2.sort()
l3 = [l.index(i)+1 for i in l if l.index(i)!=l2.index(i)]
if len(l3)>2:
print("no")
elif len(3)==0:
print("1 1")
else:
print("yes")
print(*l3) | Title: Sort the Array
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Being a programmer, you like arrays a lot. For your birthday, your friends have given you an array *a* consisting of *n* distinct integers.
Unfortunately, the size of *a* is too small. You want a bigger array! Your frie... | ```python
n = int(input())
l = [int(x) for x in input().split()]
l2 = l.copy()
l2.sort()
l3 = [l.index(i)+1 for i in l if l.index(i)!=l2.index(i)]
if len(l3)>2:
print("no")
elif len(3)==0:
print("1 1")
else:
print("yes")
print(*l3)
``` | -1 | |
44 | C | Holidays | PROGRAMMING | 1,300 | [
"implementation"
] | C. Holidays | 2 | 256 | School holidays come in Berland. The holidays are going to continue for *n* days. The students of school №*N* are having the time of their lives and the IT teacher Marina Sergeyevna, who has spent all the summer busy checking the BSE (Berland State Examination) results, has finally taken a vacation break! Some people a... | The first input line contains two numbers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=100) — the number of days in Berland holidays and the number of people in charge of the watering respectively. The next *m* lines contain the description of the duty schedule. Each line contains two integers *a**i* and *b**i* (1<=≤<=*a**i*<=≤<=*... | Print "OK" (without quotes), if the schedule does not contain mistakes. Otherwise you have to find the minimal number of a day when the flowers will not be watered or will be watered multiple times, and output two integers — the day number and the number of times the flowers will be watered that day. | [
"10 5\n1 2\n3 3\n4 6\n7 7\n8 10\n",
"10 5\n1 2\n2 3\n4 5\n7 8\n9 10\n",
"10 5\n1 2\n3 3\n5 7\n7 7\n7 10\n"
] | [
"OK\n",
"2 2\n",
"4 0\n"
] | Keep in mind that in the second sample the mistake occurs not only on the second day, but also on the sixth day, when nobody waters the flowers. However, you have to print the second day, i.e. the day with the minimal number. | 0 | [
{
"input": "10 5\n1 2\n3 3\n4 6\n7 7\n8 10",
"output": "OK"
},
{
"input": "10 5\n1 2\n2 3\n4 5\n7 8\n9 10",
"output": "2 2"
},
{
"input": "10 5\n1 2\n3 3\n5 7\n7 7\n7 10",
"output": "4 0"
},
{
"input": "5 4\n1 1\n2 2\n3 3\n4 5",
"output": "OK"
},
{
"input": "100 5... | 1,597,935,603 | 2,147,483,647 | PyPy 3 | OK | TESTS | 35 | 280 | 0 | n,m=map(int,input().split())
ar=[0 for _ in range(n)]
for _ in range(m):
a,b=map(int,input().split())
for j in range(a-1,b):
ar[j]+=1
for e in range(n):
if(ar[e]!=1):
print(e+1,ar[e])
break
else:
print("OK")
| Title: Holidays
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
School holidays come in Berland. The holidays are going to continue for *n* days. The students of school №*N* are having the time of their lives and the IT teacher Marina Sergeyevna, who has spent all the summer busy checking the ... | ```python
n,m=map(int,input().split())
ar=[0 for _ in range(n)]
for _ in range(m):
a,b=map(int,input().split())
for j in range(a-1,b):
ar[j]+=1
for e in range(n):
if(ar[e]!=1):
print(e+1,ar[e])
break
else:
print("OK")
``` | 3.93 |
805 | A | Fake NP | PROGRAMMING | 1,000 | [
"greedy",
"math"
] | null | null | Tavak and Seyyed are good friends. Seyyed is very funny and he told Tavak to solve the following problem instead of longest-path.
You are given *l* and *r*. For all integers from *l* to *r*, inclusive, we wrote down all of their integer divisors except 1. Find the integer that we wrote down the maximum number of times... | The first line contains two integers *l* and *r* (2<=≤<=*l*<=≤<=*r*<=≤<=109). | Print single integer, the integer that appears maximum number of times in the divisors.
If there are multiple answers, print any of them. | [
"19 29\n",
"3 6\n"
] | [
"2\n",
"3\n"
] | Definition of a divisor: [https://www.mathsisfun.com/definitions/divisor-of-an-integer-.html](https://www.mathsisfun.com/definitions/divisor-of-an-integer-.html)
The first example: from 19 to 29 these numbers are divisible by 2: {20, 22, 24, 26, 28}.
The second example: from 3 to 6 these numbers are divisible by 3: {... | 500 | [
{
"input": "19 29",
"output": "2"
},
{
"input": "3 6",
"output": "2"
},
{
"input": "39 91",
"output": "2"
},
{
"input": "76 134",
"output": "2"
},
{
"input": "93 95",
"output": "2"
},
{
"input": "17 35",
"output": "2"
},
{
"input": "94 95",... | 1,551,474,459 | 2,147,483,647 | Python 3 | OK | TESTS | 93 | 109 | 0 | lista = []
entrada = str(input())
lista = entrada.split()
num1 = int(lista[0])
num2 = int(lista[1])
if(num2 - num1 == 0):
print(num1)
else:
print("2") | Title: Fake NP
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Tavak and Seyyed are good friends. Seyyed is very funny and he told Tavak to solve the following problem instead of longest-path.
You are given *l* and *r*. For all integers from *l* to *r*, inclusive, we wrote down all of the... | ```python
lista = []
entrada = str(input())
lista = entrada.split()
num1 = int(lista[0])
num2 = int(lista[1])
if(num2 - num1 == 0):
print(num1)
else:
print("2")
``` | 3 | |
985 | D | Sand Fortress | PROGRAMMING | 2,100 | [
"binary search",
"constructive algorithms",
"math"
] | null | null | You are going to the beach with the idea to build the greatest sand castle ever in your head! The beach is not as three-dimensional as you could have imagined, it can be decribed as a line of spots to pile up sand pillars. Spots are numbered 1 through infinity from left to right.
Obviously, there is not enough sand o... | The only line contains two integer numbers *n* and *H* (1<=≤<=*n*,<=*H*<=≤<=1018) — the number of sand packs you have and the height of the fence, respectively. | Print the minimum number of spots you can occupy so the all the castle building conditions hold. | [
"5 2\n",
"6 8\n"
] | [
"3\n",
"3\n"
] | Here are the heights of some valid castles:
- *n* = 5, *H* = 2, [2, 2, 1, 0, ...], [2, 1, 1, 1, 0, ...], [1, 0, 1, 2, 1, 0, ...] - *n* = 6, *H* = 8, [3, 2, 1, 0, ...], [2, 2, 1, 1, 0, ...], [0, 1, 0, 1, 2, 1, 1, 0...] (this one has 5 spots occupied)
The first list for both cases is the optimal answer, 3 spots are ... | 0 | [
{
"input": "5 2",
"output": "3"
},
{
"input": "6 8",
"output": "3"
},
{
"input": "20 4",
"output": "7"
},
{
"input": "1000000000000000000 1000000000000000000",
"output": "1414213562"
},
{
"input": "1 1",
"output": "1"
},
{
"input": "1 10000000000000000... | 1,527,029,073 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 77 | 0 | from math import floor, sqrt
n, H = map(int, input().split())
l = 0
r = 1e18
while l != r - 1:
m = (l + r)//2
if m**2 - H*(H - 1)//2 <= n:
l = m
else:
r = m
k = l
ans = k*2 - 1
ans += (n - (k**2))//k
print(int(ans))
| Title: Sand Fortress
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are going to the beach with the idea to build the greatest sand castle ever in your head! The beach is not as three-dimensional as you could have imagined, it can be decribed as a line of spots to pile up sand pillars... | ```python
from math import floor, sqrt
n, H = map(int, input().split())
l = 0
r = 1e18
while l != r - 1:
m = (l + r)//2
if m**2 - H*(H - 1)//2 <= n:
l = m
else:
r = m
k = l
ans = k*2 - 1
ans += (n - (k**2))//k
print(int(ans))
``` | 0 | |
711 | A | Bus to Udayland | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | ZS the Coder and Chris the Baboon are travelling to Udayland! To get there, they have to get on the special IOI bus. The IOI bus has *n* rows of seats. There are 4 seats in each row, and the seats are separated into pairs by a walkway. When ZS and Chris came, some places in the bus was already occupied.
ZS and Chris a... | The first line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of rows of seats in the bus.
Then, *n* lines follow. Each line contains exactly 5 characters, the first two of them denote the first pair of seats in the row, the third character denotes the walkway (it always equals '|') and t... | If it is possible for Chris and ZS to sit at neighbouring empty seats, print "YES" (without quotes) in the first line. In the next *n* lines print the bus configuration, where the characters in the pair of seats for Chris and ZS is changed with characters '+'. Thus the configuration should differ from the input one by ... | [
"6\nOO|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX\n",
"4\nXO|OX\nXO|XX\nOX|OX\nXX|OX\n",
"5\nXX|XX\nXX|XX\nXO|OX\nXO|OO\nOX|XO\n"
] | [
"YES\n++|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX\n",
"NO\n",
"YES\nXX|XX\nXX|XX\nXO|OX\nXO|++\nOX|XO\n"
] | Note that the following is an incorrect configuration for the first sample case because the seats must be in the same pair.
O+|+X
XO|XX
OX|OO
XX|OX
OO|OO
OO|XX | 500 | [
{
"input": "6\nOO|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX",
"output": "YES\n++|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX"
},
{
"input": "4\nXO|OX\nXO|XX\nOX|OX\nXX|OX",
"output": "NO"
},
{
"input": "5\nXX|XX\nXX|XX\nXO|OX\nXO|OO\nOX|XO",
"output": "YES\nXX|XX\nXX|XX\nXO|OX\nXO|++\nOX|XO"
... | 1,621,237,712 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 31 | 0 | n=int(input())
d=0
e=''
for i in range(n):
s=input()
if(s[0]=='O' and s[1]=='O'):
e+='++'+s[2:]
d+=1
elif(s[3]=='O' and s[4]=='O'):
e+=s[:3]+'++'
d+=1
if(d==1):
d+=1
print(e)
else:
print(s)
| Title: Bus to Udayland
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
ZS the Coder and Chris the Baboon are travelling to Udayland! To get there, they have to get on the special IOI bus. The IOI bus has *n* rows of seats. There are 4 seats in each row, and the seats are separated into pai... | ```python
n=int(input())
d=0
e=''
for i in range(n):
s=input()
if(s[0]=='O' and s[1]=='O'):
e+='++'+s[2:]
d+=1
elif(s[3]=='O' and s[4]=='O'):
e+=s[:3]+'++'
d+=1
if(d==1):
d+=1
print(e)
else:
print(s)
``` | 0 | |
929 | D | Пограничные врата | PROGRAMMING | 2,400 | [] | null | null | Герой Аркадий находится на узкой полоске земли, разделенной на *n* зон, пронумерованных от 1 до *n*. Из *i*-й зоны можно пройти лишь в (*i*<=-<=1)-ю зону и в (*i*<=+<=1)-ю зону, если они существуют. При этом между каждой парой соседних зон находятся пограничные врата, которые могут быть разных цветов, цвет врат между *... | Первая строка содержит три целых числа *n*, *a*, *b* (2<=≤<=*n*<=≤<=100<=000, 1<=≤<=*a*,<=*b*<=≤<=*n*, *a*<=≠<=*b*) — число зон, номер начальной зоны и номер конечной зоны, соответственно.
Вторая строка содержит *n*<=-<=1 целое число *g*1,<=*g*2,<=...,<=*g**n*<=-<=1 (1<=≤<=*g**i*<=≤<=100<=000), где *g**i* означает цве... | Если Аркадий не может попасть из зоны *a* в зону *b*, не имея изначально ключей, выведите -1.
Иначе выведите минимальное количество ходов, которое потребуется Аркадию. | [
"5 4 1\n3 1 1 2\n7 1 2 1 3\n",
"5 1 5\n4 3 2 1\n4 3 2 5 5\n"
] | [
"7\n",
"-1\n"
] | В первом примере, чтобы попасть из зоны 4 в зону 1, Аркадию нужно сначала взять ключ цвета 1, пройти в зону 3, там взять ключ цвета 2 и пройти обратно в зону 4 и затем в зону 5, взять там ключ цвета 3 и дойти до зоны 1 за четыре хода.
Во втором примере Аркадий может дойти лишь до четвертой зоны, так как шатров храните... | 2,500 | [] | 1,520,049,972 | 45,072 | Python 3 | WRONG_ANSWER | PRETESTS | 0 | 46 | 5,632,000 | def dijkstra_shortest_path(graph, start, p={}, u=[], d={}):
if len(p) == 0: p[start] = 4 # инициализация начального пути
# print "start V: %d, " % (start)
for x in graph[start]:
if (x not in u and x != start):
if (x not in p.keys() or (graph[start][x] + p[start]) < p[x]):
... | Title: Пограничные врата
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Герой Аркадий находится на узкой полоске земли, разделенной на *n* зон, пронумерованных от 1 до *n*. Из *i*-й зоны можно пройти лишь в (*i*<=-<=1)-ю зону и в (*i*<=+<=1)-ю зону, если они существуют. При этом между каж... | ```python
def dijkstra_shortest_path(graph, start, p={}, u=[], d={}):
if len(p) == 0: p[start] = 4 # инициализация начального пути
# print "start V: %d, " % (start)
for x in graph[start]:
if (x not in u and x != start):
if (x not in p.keys() or (graph[start][x] + p[start]) < p[x]):
... | 0 | |
1,005 | A | Tanya and Stairways | PROGRAMMING | 800 | [
"implementation"
] | null | null | Little girl Tanya climbs the stairs inside a multi-storey building. Every time Tanya climbs a stairway, she starts counting steps from $1$ to the number of steps in this stairway. She speaks every number aloud. For example, if she climbs two stairways, the first of which contains $3$ steps, and the second contains $4$ ... | The first line contains $n$ ($1 \le n \le 1000$) — the total number of numbers pronounced by Tanya.
The second line contains integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 1000$) — all the numbers Tanya pronounced while climbing the stairs, in order from the first to the last pronounced number. Passing a stairway wit... | In the first line, output $t$ — the number of stairways that Tanya climbed. In the second line, output $t$ numbers — the number of steps in each stairway she climbed. Write the numbers in the correct order of passage of the stairways. | [
"7\n1 2 3 1 2 3 4\n",
"4\n1 1 1 1\n",
"5\n1 2 3 4 5\n",
"5\n1 2 1 2 1\n"
] | [
"2\n3 4 ",
"4\n1 1 1 1 ",
"1\n5 ",
"3\n2 2 1 "
] | none | 0 | [
{
"input": "7\n1 2 3 1 2 3 4",
"output": "2\n3 4 "
},
{
"input": "4\n1 1 1 1",
"output": "4\n1 1 1 1 "
},
{
"input": "5\n1 2 3 4 5",
"output": "1\n5 "
},
{
"input": "5\n1 2 1 2 1",
"output": "3\n2 2 1 "
},
{
"input": "1\n1",
"output": "1\n1 "
},
{
"inp... | 1,675,704,702 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 31 | 0 | n = int(input())
l = list(map(int, input().split()))
ans = []
for i in range(1, n):
if i == n - 1:
ans.append(l[i])
if l[i] == 1:
ans.append(l[i-1])
print(len(ans))
print(*ans)
| Title: Tanya and Stairways
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little girl Tanya climbs the stairs inside a multi-storey building. Every time Tanya climbs a stairway, she starts counting steps from $1$ to the number of steps in this stairway. She speaks every number aloud. For ... | ```python
n = int(input())
l = list(map(int, input().split()))
ans = []
for i in range(1, n):
if i == n - 1:
ans.append(l[i])
if l[i] == 1:
ans.append(l[i-1])
print(len(ans))
print(*ans)
``` | 0 | |
337 | B | Routine Problem | PROGRAMMING | 1,400 | [
"greedy",
"math",
"number theory"
] | null | null | Manao has a monitor. The screen of the monitor has horizontal to vertical length ratio *a*:*b*. Now he is going to watch a movie. The movie's frame has horizontal to vertical length ratio *c*:*d*. Manao adjusts the view in such a way that the movie preserves the original frame ratio, but also occupies as much space on ... | A single line contains four space-separated integers *a*, *b*, *c*, *d* (1<=≤<=*a*,<=*b*,<=*c*,<=*d*<=≤<=1000). | Print the answer to the problem as "p/q", where *p* is a non-negative integer, *q* is a positive integer and numbers *p* and *q* don't have a common divisor larger than 1. | [
"1 1 3 2\n",
"4 3 2 2\n"
] | [
"1/3\n",
"1/4\n"
] | Sample 1. Manao's monitor has a square screen. The movie has 3:2 horizontal to vertical length ratio. Obviously, the movie occupies most of the screen if the width of the picture coincides with the width of the screen. In this case, only 2/3 of the monitor will project the movie in the horizontal dimension: <img class=... | 1,000 | [
{
"input": "1 1 3 2",
"output": "1/3"
},
{
"input": "4 3 2 2",
"output": "1/4"
},
{
"input": "3 4 2 3",
"output": "1/9"
},
{
"input": "4 4 5 5",
"output": "0/1"
},
{
"input": "1 1 1 1",
"output": "0/1"
},
{
"input": "1000 1000 1000 1000",
"output":... | 1,685,063,544 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 6 | 92 | 0 | import sys
def gcd(a: int , b: int) -> int:
if b == 0:
return a
return gcd(b, a % b)
def main() -> None:
read = sys.stdin.readline
a, b, c, d = (int(i) for i in read().split())
multipler: int = max(c, d)
a *= multipler
b *= multipler
if c < d:
multip... | Title: Routine Problem
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Manao has a monitor. The screen of the monitor has horizontal to vertical length ratio *a*:*b*. Now he is going to watch a movie. The movie's frame has horizontal to vertical length ratio *c*:*d*. Manao adjusts the view... | ```python
import sys
def gcd(a: int , b: int) -> int:
if b == 0:
return a
return gcd(b, a % b)
def main() -> None:
read = sys.stdin.readline
a, b, c, d = (int(i) for i in read().split())
multipler: int = max(c, d)
a *= multipler
b *= multipler
if c < d:
... | 0 | |
787 | A | The Monster | PROGRAMMING | 1,200 | [
"brute force",
"math",
"number theory"
] | null | null | A monster is chasing after Rick and Morty on another planet. They're so frightened that sometimes they scream. More accurately, Rick screams at times *b*,<=*b*<=+<=*a*,<=*b*<=+<=2*a*,<=*b*<=+<=3*a*,<=... and Morty screams at times *d*,<=*d*<=+<=*c*,<=*d*<=+<=2*c*,<=*d*<=+<=3*c*,<=....
The Monster will catch them if a... | The first line of input contains two integers *a* and *b* (1<=≤<=*a*,<=*b*<=≤<=100).
The second line contains two integers *c* and *d* (1<=≤<=*c*,<=*d*<=≤<=100). | Print the first time Rick and Morty will scream at the same time, or <=-<=1 if they will never scream at the same time. | [
"20 2\n9 19\n",
"2 1\n16 12\n"
] | [
"82\n",
"-1\n"
] | In the first sample testcase, Rick's 5th scream and Morty's 8th time are at time 82.
In the second sample testcase, all Rick's screams will be at odd times and Morty's will be at even times, so they will never scream at the same time. | 500 | [
{
"input": "20 2\n9 19",
"output": "82"
},
{
"input": "2 1\n16 12",
"output": "-1"
},
{
"input": "39 52\n88 78",
"output": "1222"
},
{
"input": "59 96\n34 48",
"output": "1748"
},
{
"input": "87 37\n91 29",
"output": "211"
},
{
"input": "11 81\n49 7",
... | 1,693,949,912 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 58 | 77 | 10,035,200 | a,b=[int(e) for e in input().split()]
c,d=[int(e) for e in input().split()]
A=[(i-b)%a==0 and (i-d)%c==0 for i in range(max(b,d),10**6)]
if 1 in A:
print(A.index(1)+max(b,d))
else:
print(-1) | Title: The Monster
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A monster is chasing after Rick and Morty on another planet. They're so frightened that sometimes they scream. More accurately, Rick screams at times *b*,<=*b*<=+<=*a*,<=*b*<=+<=2*a*,<=*b*<=+<=3*a*,<=... and Morty screams a... | ```python
a,b=[int(e) for e in input().split()]
c,d=[int(e) for e in input().split()]
A=[(i-b)%a==0 and (i-d)%c==0 for i in range(max(b,d),10**6)]
if 1 in A:
print(A.index(1)+max(b,d))
else:
print(-1)
``` | 3 | |
352 | A | Jeff and Digits | PROGRAMMING | 1,000 | [
"brute force",
"implementation",
"math"
] | null | null | Jeff's got *n* cards, each card contains either digit 0, or digit 5. Jeff can choose several cards and put them in a line so that he gets some number. What is the largest possible number divisible by 90 Jeff can make from the cards he's got?
Jeff must make the number without leading zero. At that, we assume that numbe... | The first line contains integer *n* (1<=≤<=*n*<=≤<=103). The next line contains *n* integers *a*1, *a*2, ..., *a**n* (*a**i*<==<=0 or *a**i*<==<=5). Number *a**i* represents the digit that is written on the *i*-th card. | In a single line print the answer to the problem — the maximum number, divisible by 90. If you can't make any divisible by 90 number from the cards, print -1. | [
"4\n5 0 5 0\n",
"11\n5 5 5 5 5 5 5 5 0 5 5\n"
] | [
"0\n",
"5555555550\n"
] | In the first test you can make only one number that is a multiple of 90 — 0.
In the second test you can make number 5555555550, it is a multiple of 90. | 500 | [
{
"input": "4\n5 0 5 0",
"output": "0"
},
{
"input": "11\n5 5 5 5 5 5 5 5 0 5 5",
"output": "5555555550"
},
{
"input": "7\n5 5 5 5 5 5 5",
"output": "-1"
},
{
"input": "1\n5",
"output": "-1"
},
{
"input": "1\n0",
"output": "0"
},
{
"input": "11\n5 0 5 ... | 1,694,448,815 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 2 | 92 | 0 | a = int(input())
sum = 0
count = 0
count0 = 0
lst = list(map(int,input().split()))
lst.sort(reverse=True)
for i in range(len(lst)):
sum += lst[i]
if lst[i] == 5:
count += 1
else:
count0 += 1
if count > 9:
temp = count//9
count = temp*9
result = '5' * count + '0' * ... | Title: Jeff and Digits
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Jeff's got *n* cards, each card contains either digit 0, or digit 5. Jeff can choose several cards and put them in a line so that he gets some number. What is the largest possible number divisible by 90 Jeff can make fr... | ```python
a = int(input())
sum = 0
count = 0
count0 = 0
lst = list(map(int,input().split()))
lst.sort(reverse=True)
for i in range(len(lst)):
sum += lst[i]
if lst[i] == 5:
count += 1
else:
count0 += 1
if count > 9:
temp = count//9
count = temp*9
result = '5' * coun... | 0 | |
344 | B | Simple Molecules | PROGRAMMING | 1,200 | [
"brute force",
"graphs",
"math"
] | null | null | Mad scientist Mike is busy carrying out experiments in chemistry. Today he will attempt to join three atoms into one molecule.
A molecule consists of atoms, with some pairs of atoms connected by atomic bonds. Each atom has a valence number — the number of bonds the atom must form with other atoms. An atom can form one... | The single line of the input contains three space-separated integers *a*, *b* and *c* (1<=≤<=*a*,<=*b*,<=*c*<=≤<=106) — the valence numbers of the given atoms. | If such a molecule can be built, print three space-separated integers — the number of bonds between the 1-st and the 2-nd, the 2-nd and the 3-rd, the 3-rd and the 1-st atoms, correspondingly. If there are multiple solutions, output any of them. If there is no solution, print "Impossible" (without the quotes). | [
"1 1 2\n",
"3 4 5\n",
"4 1 1\n"
] | [
"0 1 1\n",
"1 3 2\n",
"Impossible\n"
] | The first sample corresponds to the first figure. There are no bonds between atoms 1 and 2 in this case.
The second sample corresponds to the second figure. There is one or more bonds between each pair of atoms.
The third sample corresponds to the third figure. There is no solution, because an atom cannot form bonds ... | 1,000 | [
{
"input": "1 1 2",
"output": "0 1 1"
},
{
"input": "3 4 5",
"output": "1 3 2"
},
{
"input": "4 1 1",
"output": "Impossible"
},
{
"input": "1 1 1",
"output": "Impossible"
},
{
"input": "1000000 1000000 1000000",
"output": "500000 500000 500000"
},
{
"i... | 1,699,630,657 | 2,147,483,647 | PyPy 3 | OK | TESTS | 32 | 186 | 0 | a, b, c = [int(c) for c in input().split()]
if ((b - c + a) % 2 == 1) or ((b - c + a) < 0) or ((b + c - a) < 0) or (((-b) + c + a) < 0):
print("Impossible")
else:
x = (b - c + a) // 2
y = (b + c - a) // 2
z = ((-b) + c + a) // 2
print(f"{x} {y} {z}")
| Title: Simple Molecules
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Mad scientist Mike is busy carrying out experiments in chemistry. Today he will attempt to join three atoms into one molecule.
A molecule consists of atoms, with some pairs of atoms connected by atomic bonds. Each ato... | ```python
a, b, c = [int(c) for c in input().split()]
if ((b - c + a) % 2 == 1) or ((b - c + a) < 0) or ((b + c - a) < 0) or (((-b) + c + a) < 0):
print("Impossible")
else:
x = (b - c + a) // 2
y = (b + c - a) // 2
z = ((-b) + c + a) // 2
print(f"{x} {y} {z}")
``` | 3 | |
835 | A | Key races | PROGRAMMING | 800 | [
"math"
] | null | null | Two boys decided to compete in text typing on the site "Key races". During the competition, they have to type a text consisting of *s* characters. The first participant types one character in *v*1 milliseconds and has ping *t*1 milliseconds. The second participant types one character in *v*2 milliseconds and has ping *... | The first line contains five integers *s*, *v*1, *v*2, *t*1, *t*2 (1<=≤<=*s*,<=*v*1,<=*v*2,<=*t*1,<=*t*2<=≤<=1000) — the number of characters in the text, the time of typing one character for the first participant, the time of typing one character for the the second participant, the ping of the first participant and th... | If the first participant wins, print "First". If the second participant wins, print "Second". In case of a draw print "Friendship". | [
"5 1 2 1 2\n",
"3 3 1 1 1\n",
"4 5 3 1 5\n"
] | [
"First\n",
"Second\n",
"Friendship\n"
] | In the first example, information on the success of the first participant comes in 7 milliseconds, of the second participant — in 14 milliseconds. So, the first wins.
In the second example, information on the success of the first participant comes in 11 milliseconds, of the second participant — in 5 milliseconds. So, ... | 500 | [
{
"input": "5 1 2 1 2",
"output": "First"
},
{
"input": "3 3 1 1 1",
"output": "Second"
},
{
"input": "4 5 3 1 5",
"output": "Friendship"
},
{
"input": "1000 1000 1000 1000 1000",
"output": "Friendship"
},
{
"input": "1 1 1 1 1",
"output": "Friendship"
},
... | 1,616,785,518 | 2,147,483,647 | Python 3 | OK | TESTS | 32 | 62 | 0 | s,a,b,c,d = map(int,input().split())
e = s*a+2*c
f = s*b+2*d
if e<f:
print('First')
elif e==f:
print('Friendship')
else:
print('Second') | Title: Key races
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Two boys decided to compete in text typing on the site "Key races". During the competition, they have to type a text consisting of *s* characters. The first participant types one character in *v*1 milliseconds and has ping *t... | ```python
s,a,b,c,d = map(int,input().split())
e = s*a+2*c
f = s*b+2*d
if e<f:
print('First')
elif e==f:
print('Friendship')
else:
print('Second')
``` | 3 | |
509 | A | Maximum in Table | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | An *n*<=×<=*n* table *a* is defined as follows:
- The first row and the first column contain ones, that is: *a**i*,<=1<==<=*a*1,<=*i*<==<=1 for all *i*<==<=1,<=2,<=...,<=*n*. - Each of the remaining numbers in the table is equal to the sum of the number above it and the number to the left of it. In other words, the ... | The only line of input contains a positive integer *n* (1<=≤<=*n*<=≤<=10) — the number of rows and columns of the table. | Print a single line containing a positive integer *m* — the maximum value in the table. | [
"1\n",
"5\n"
] | [
"1",
"70"
] | In the second test the rows of the table look as follows: | 0 | [
{
"input": "1",
"output": "1"
},
{
"input": "5",
"output": "70"
},
{
"input": "2",
"output": "2"
},
{
"input": "3",
"output": "6"
},
{
"input": "4",
"output": "20"
},
{
"input": "6",
"output": "252"
},
{
"input": "7",
"output": "924"
... | 1,663,204,202 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 31 | 0 | from math import factorial as f
i = int(input())
print(f(2*(i-1))/f(i-1)**2) | Title: Maximum in Table
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
An *n*<=×<=*n* table *a* is defined as follows:
- The first row and the first column contain ones, that is: *a**i*,<=1<==<=*a*1,<=*i*<==<=1 for all *i*<==<=1,<=2,<=...,<=*n*. - Each of the remaining numbers in the t... | ```python
from math import factorial as f
i = int(input())
print(f(2*(i-1))/f(i-1)**2)
``` | 0 | |
628 | B | New Skateboard | PROGRAMMING | 1,300 | [
"dp"
] | null | null | Max wants to buy a new skateboard. He has calculated the amount of money that is needed to buy a new skateboard. He left a calculator on the floor and went to ask some money from his parents. Meanwhile his little brother Yusuf came and started to press the keys randomly. Unfortunately Max has forgotten the number which... | The only line contains string *s* (1<=≤<=|*s*|<=≤<=3·105). The string *s* contains only digits from 0 to 9. | Print integer *a* — the number of substrings of the string *s* that are divisible by 4.
Note that the answer can be huge, so you should use 64-bit integer type to store it. In C++ you can use the long long integer type and in Java you can use long integer type. | [
"124\n",
"04\n",
"5810438174\n"
] | [
"4\n",
"3\n",
"9\n"
] | none | 0 | [
{
"input": "124",
"output": "4"
},
{
"input": "04",
"output": "3"
},
{
"input": "5810438174",
"output": "9"
},
{
"input": "1",
"output": "0"
},
{
"input": "039",
"output": "1"
},
{
"input": "97247",
"output": "6"
},
{
"input": "5810438174",... | 1,685,739,383 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 22 | 62 | 2,150,400 | import sys
input = sys.stdin.readline
s = input().strip()
a = s.count('0') + s.count('4') + s.count('8')
for i in range(len(s) - 1):
if int(s[i:i + 2]) % 4 == 0:
a += i + 1
print(a)
| Title: New Skateboard
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Max wants to buy a new skateboard. He has calculated the amount of money that is needed to buy a new skateboard. He left a calculator on the floor and went to ask some money from his parents. Meanwhile his little brother... | ```python
import sys
input = sys.stdin.readline
s = input().strip()
a = s.count('0') + s.count('4') + s.count('8')
for i in range(len(s) - 1):
if int(s[i:i + 2]) % 4 == 0:
a += i + 1
print(a)
``` | 3 | |
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 ... | 1,693,061,807 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 62 | 0 | n = int(input())
if n%2:
print(3, *[2]*(n//2 -1))
else:
print(*[2]*(n//2)) | Title: Bachgold Problem
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Bachgold problem is very easy to formulate. Given a positive integer *n* represent it as a sum of maximum possible number of prime numbers. One can prove that such representation exists for any integer greater than 1.
... | ```python
n = int(input())
if n%2:
print(3, *[2]*(n//2 -1))
else:
print(*[2]*(n//2))
``` | 0 | |
171 | D | Broken checker | PROGRAMMING | 1,300 | [
"*special",
"brute force"
] | null | null | "This problem is rubbish! There is not statement, and there are only 5 test cases. The problemsetter took liberties with this problem!" — people complained in the comments to one round on Codeforces. And even more... No, wait, the checker for the problem was alright, that's a mercy. | The only line of the input contains an integer between 1 and 5, inclusive. All tests for this problem are different. The contents of the test case doesn't need to be equal to its index. | The only line of the output contains an integer between 1 and 3, inclusive. | [] | [] | This problem has no samples, since there so few test cases. | 0 | [
{
"input": "3",
"output": "1"
},
{
"input": "1",
"output": "2"
},
{
"input": "4",
"output": "2"
},
{
"input": "2",
"output": "3"
},
{
"input": "5",
"output": "1"
}
] | 1,648,745,197 | 2,147,483,647 | Python 3 | OK | TESTS | 5 | 92 | 102,400 | from collections import defaultdict, deque
import sys
input = lambda : sys.stdin.readline().strip()
##############################################################################
print(int(input())%5%3+1)
| Title: Broken checker
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
"This problem is rubbish! There is not statement, and there are only 5 test cases. The problemsetter took liberties with this problem!" — people complained in the comments to one round on Codeforces. And even more... No,... | ```python
from collections import defaultdict, deque
import sys
input = lambda : sys.stdin.readline().strip()
##############################################################################
print(int(input())%5%3+1)
``` | 3 | |
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"
},
{
"... | 1,593,842,837 | 2,147,483,647 | Python 3 | OK | TESTS | 47 | 109 | 307,200 | n,x = input().split()
a = input()
a = [int(g) for g in a.split()]
dif = abs(sum(a))
cards =0
if dif%int(x) == 0:
cards += dif//int(x)
else:
cards += dif//int(x)
cards += 1
print (cards)
... | 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
n,x = input().split()
a = input()
a = [int(g) for g in a.split()]
dif = abs(sum(a))
cards =0
if dif%int(x) == 0:
cards += dif//int(x)
else:
cards += dif//int(x)
cards += 1
print (cards)
... | 3 | |
599 | A | Patrick and Shopping | PROGRAMMING | 800 | [
"implementation"
] | null | null | Today Patrick waits for a visit from his friend Spongebob. To prepare for the visit, Patrick needs to buy some goodies in two stores located near his house. There is a *d*1 meter long road between his house and the first shop and a *d*2 meter long road between his house and the second shop. Also, there is a road of len... | The first line of the input contains three integers *d*1, *d*2, *d*3 (1<=≤<=*d*1,<=*d*2,<=*d*3<=≤<=108) — the lengths of the paths.
- *d*1 is the length of the path connecting Patrick's house and the first shop; - *d*2 is the length of the path connecting Patrick's house and the second shop; - *d*3 is the length o... | Print the minimum distance that Patrick will have to walk in order to visit both shops and return to his house. | [
"10 20 30\n",
"1 1 5\n"
] | [
"60\n",
"4\n"
] | The first sample is shown on the picture in the problem statement. One of the optimal routes is: house <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/70a0795f45d32287dba0eb83fc4a3f470c6e5537.png" style="max-width: 100.0%;max-height: 100.0%;"/> first shop <img align="middle" class="tex-form... | 500 | [
{
"input": "10 20 30",
"output": "60"
},
{
"input": "1 1 5",
"output": "4"
},
{
"input": "100 33 34",
"output": "134"
},
{
"input": "777 777 777",
"output": "2331"
},
{
"input": "2 2 8",
"output": "8"
},
{
"input": "12 34 56",
"output": "92"
},
... | 1,589,010,283 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 108 | 6,656,000 | # int(input())
# [int(s) for s in input().split()]
# input()
from math import gcd
def solve():
d = [int(s) for s in input().split()]
ans = d[0]+d[1]
if d[0] + d[1] < d[2]:
ans += d[0] + d[1]
else:
ans += d[2]
print(ans)
if __name__ == "__main__":
solve() | Title: Patrick and Shopping
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Today Patrick waits for a visit from his friend Spongebob. To prepare for the visit, Patrick needs to buy some goodies in two stores located near his house. There is a *d*1 meter long road between his house and the... | ```python
# int(input())
# [int(s) for s in input().split()]
# input()
from math import gcd
def solve():
d = [int(s) for s in input().split()]
ans = d[0]+d[1]
if d[0] + d[1] < d[2]:
ans += d[0] + d[1]
else:
ans += d[2]
print(ans)
if __name__ == "__main__":
... | 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":... | 1,686,120,439 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | x = input("")
y = len(x) - 2
if len(x) > 10:
print(x[0] + str(y) + x[-1])
else:
print("Stop") | 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
x = input("")
y = len(x) - 2
if len(x) > 10:
print(x[0] + str(y) + x[-1])
else:
print("Stop")
``` | 0 |
573 | A | Bear and Poker | PROGRAMMING | 1,300 | [
"implementation",
"math",
"number theory"
] | null | null | Limak is an old brown bear. He often plays poker with his friends. Today they went to a casino. There are *n* players (including Limak himself) and right now all of them have bids on the table. *i*-th of them has bid with size *a**i* dollars.
Each player can double his bid any number of times and triple his bid any nu... | First line of input contains an integer *n* (2<=≤<=*n*<=≤<=105), the number of players.
The second line contains *n* integer numbers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=109) — the bids of players. | Print "Yes" (without the quotes) if players can make their bids become equal, or "No" otherwise. | [
"4\n75 150 75 50\n",
"3\n100 150 250\n"
] | [
"Yes\n",
"No\n"
] | In the first sample test first and third players should double their bids twice, second player should double his bid once and fourth player should both double and triple his bid.
It can be shown that in the second sample test there is no way to make all bids equal. | 500 | [
{
"input": "4\n75 150 75 50",
"output": "Yes"
},
{
"input": "3\n100 150 250",
"output": "No"
},
{
"input": "7\n34 34 68 34 34 68 34",
"output": "Yes"
},
{
"input": "10\n72 96 12 18 81 20 6 2 54 1",
"output": "No"
},
{
"input": "20\n958692492 954966768 77387000 724... | 1,597,409,476 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 6 | 233 | 9,830,400 | from sys import stdin,stdout
from collections import Counter
from math import ceil
from bisect import bisect_left
from bisect import bisect_right
import math
ai = lambda: list(map(int, stdin.readline().split()))
ei = lambda: map(int, stdin.readline().split())
ip = lambda: int(stdin.readline().strip())
n =... | Title: Bear and Poker
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Limak is an old brown bear. He often plays poker with his friends. Today they went to a casino. There are *n* players (including Limak himself) and right now all of them have bids on the table. *i*-th of them has bid wit... | ```python
from sys import stdin,stdout
from collections import Counter
from math import ceil
from bisect import bisect_left
from bisect import bisect_right
import math
ai = lambda: list(map(int, stdin.readline().split()))
ei = lambda: map(int, stdin.readline().split())
ip = lambda: int(stdin.readline().strip... | 0 | |
910 | B | Door Frames | PROGRAMMING | 1,600 | [
"greedy",
"implementation"
] | null | null | Petya has equal wooden bars of length *n*. He wants to make a frame for two equal doors. Each frame has two vertical (left and right) sides of length *a* and one top side of length *b*. A solid (i.e. continuous without breaks) piece of bar is needed for each side.
Determine a minimal number of wooden bars which are ne... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=1<=000) — the length of each wooden bar.
The second line contains a single integer *a* (1<=≤<=*a*<=≤<=*n*) — the length of the vertical (left and right) sides of a door frame.
The third line contains a single integer *b* (1<=≤<=*b*<=≤<=*n*) — the length of t... | Print the minimal number of wooden bars with length *n* which are needed to make the frames for two doors. | [
"8\n1\n2\n",
"5\n3\n4\n",
"6\n4\n2\n",
"20\n5\n6\n"
] | [
"1\n",
"6\n",
"4\n",
"2\n"
] | In the first example one wooden bar is enough, since the total length of all six sides of the frames for two doors is 8.
In the second example 6 wooden bars is enough, because for each side of the frames the new wooden bar is needed. | 1,000 | [
{
"input": "8\n1\n2",
"output": "1"
},
{
"input": "5\n3\n4",
"output": "6"
},
{
"input": "6\n4\n2",
"output": "4"
},
{
"input": "20\n5\n6",
"output": "2"
},
{
"input": "1\n1\n1",
"output": "6"
},
{
"input": "3\n1\n2",
"output": "3"
},
{
"in... | 1,514,922,490 | 2,147,483,647 | Python 3 | OK | TESTS | 120 | 62 | 5,632,000 | bar = int(input())
side = int(input())
top = int(input())
current_bar = bar
num_bars = 1
dim = [side] * 4 + [top] * 2
dim.sort()
while dim != []:
#print (current_bar)
if current_bar < min(dim):
current_bar = bar
num_bars += 1
if current_bar >= dim[-1]:
current_... | Title: Door Frames
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Petya has equal wooden bars of length *n*. He wants to make a frame for two equal doors. Each frame has two vertical (left and right) sides of length *a* and one top side of length *b*. A solid (i.e. continuous without brea... | ```python
bar = int(input())
side = int(input())
top = int(input())
current_bar = bar
num_bars = 1
dim = [side] * 4 + [top] * 2
dim.sort()
while dim != []:
#print (current_bar)
if current_bar < min(dim):
current_bar = bar
num_bars += 1
if current_bar >= dim[-1]:
... | 3 | |
670 | D1 | Magic Powder - 1 | PROGRAMMING | 1,400 | [
"binary search",
"brute force",
"implementation"
] | null | null | This problem is given in two versions that differ only by constraints. If you can solve this problem in large constraints, then you can just write a single solution to the both versions. If you find the problem too difficult in large constraints, you can write solution to the simplified version only.
Waking up in the ... | The first line of the input contains two positive integers *n* and *k* (1<=≤<=*n*,<=*k*<=≤<=1000) — the number of ingredients and the number of grams of the magic powder.
The second line contains the sequence *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=1000), where the *i*-th number is equal to the number of grams of... | Print the maximum number of cookies, which Apollinaria will be able to bake using the ingredients that she has and the magic powder. | [
"3 1\n2 1 4\n11 3 16\n",
"4 3\n4 3 5 6\n11 12 14 20\n"
] | [
"4\n",
"3\n"
] | In the first sample it is profitably for Apollinaria to make the existing 1 gram of her magic powder to ingredient with the index 2, then Apollinaria will be able to bake 4 cookies.
In the second sample Apollinaria should turn 1 gram of magic powder to ingredient with the index 1 and 1 gram of magic powder to ingredie... | 1,000 | [
{
"input": "3 1\n2 1 4\n11 3 16",
"output": "4"
},
{
"input": "4 3\n4 3 5 6\n11 12 14 20",
"output": "3"
},
{
"input": "10 926\n5 6 8 1 2 5 1 8 4 4\n351 739 998 725 953 970 906 691 707 1000",
"output": "137"
},
{
"input": "20 925\n7 3 1 2 1 3 1 3 1 2 3 1 5 8 1 3 7 3 4 2\n837 ... | 1,693,752,011 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 31 | 0 | nk = input().split()
n,k = int(nk[0]), int(nk[1])
rec = [int(e) for e in input().split()]
ing = [int(e) for e in input().split()]
# one upper bound for answer (max(ing) + k)
# solution complexity O(n*log(max(ing) + k))
cm = [ing[i]//rec[i] for i in range(n)]
def canmake(c,k,ingg,cmm):
for i in ran... | Title: Magic Powder - 1
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
This problem is given in two versions that differ only by constraints. If you can solve this problem in large constraints, then you can just write a single solution to the both versions. If you find the problem too dif... | ```python
nk = input().split()
n,k = int(nk[0]), int(nk[1])
rec = [int(e) for e in input().split()]
ing = [int(e) for e in input().split()]
# one upper bound for answer (max(ing) + k)
# solution complexity O(n*log(max(ing) + k))
cm = [ing[i]//rec[i] for i in range(n)]
def canmake(c,k,ingg,cmm):
fo... | 0 | |
875 | A | Classroom Watch | PROGRAMMING | 1,200 | [
"brute force",
"math"
] | null | null | Eighth-grader Vova is on duty today in the class. After classes, he went into the office to wash the board, and found on it the number *n*. He asked what is this number and the teacher of mathematics Inna Petrovna answered Vova that *n* is the answer to the arithmetic task for first-graders. In the textbook, a certain ... | The first line contains integer *n* (1<=≤<=*n*<=≤<=109). | In the first line print one integer *k* — number of different values of *x* satisfying the condition.
In next *k* lines print these values in ascending order. | [
"21\n",
"20\n"
] | [
"1\n15\n",
"0\n"
] | In the first test case *x* = 15 there is only one variant: 15 + 1 + 5 = 21.
In the second test case there are no such *x*. | 500 | [
{
"input": "21",
"output": "1\n15"
},
{
"input": "20",
"output": "0"
},
{
"input": "1",
"output": "0"
},
{
"input": "2",
"output": "1\n1"
},
{
"input": "3",
"output": "0"
},
{
"input": "100000001",
"output": "2\n99999937\n100000000"
},
{
"i... | 1,608,641,064 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 124 | 0 | n=int(input())
def sod(s):
q=0
for x in range(len(s)):
q+=int(s[x])
return q
s=''
count=0
x=1
while x*x<n:
if x+sod(str(x))==n:
s+=str(x)+'\n'
count+=1
x+=1
print(count)
print(s[:-1]) | Title: Classroom Watch
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Eighth-grader Vova is on duty today in the class. After classes, he went into the office to wash the board, and found on it the number *n*. He asked what is this number and the teacher of mathematics Inna Petrovna answe... | ```python
n=int(input())
def sod(s):
q=0
for x in range(len(s)):
q+=int(s[x])
return q
s=''
count=0
x=1
while x*x<n:
if x+sod(str(x))==n:
s+=str(x)+'\n'
count+=1
x+=1
print(count)
print(s[:-1])
``` | 0 | |
735 | A | Ostap and Grasshopper | PROGRAMMING | 800 | [
"implementation",
"strings"
] | null | null | On the way to Rio de Janeiro Ostap kills time playing with a grasshopper he took with him in a special box. Ostap builds a line of length *n* such that some cells of this line are empty and some contain obstacles. Then, he places his grasshopper to one of the empty cells and a small insect in another empty cell. The gr... | The first line of the input contains two integers *n* and *k* (2<=≤<=*n*<=≤<=100, 1<=≤<=*k*<=≤<=*n*<=-<=1) — the number of cells in the line and the length of one grasshopper's jump.
The second line contains a string of length *n* consisting of characters '.', '#', 'G' and 'T'. Character '.' means that the correspondi... | If there exists a sequence of jumps (each jump of length *k*), such that the grasshopper can get from his initial position to the cell with the insect, print "YES" (without quotes) in the only line of the input. Otherwise, print "NO" (without quotes). | [
"5 2\n#G#T#\n",
"6 1\nT....G\n",
"7 3\nT..#..G\n",
"6 2\n..GT..\n"
] | [
"YES\n",
"YES\n",
"NO\n",
"NO\n"
] | In the first sample, the grasshopper can make one jump to the right in order to get from cell 2 to cell 4.
In the second sample, the grasshopper is only able to jump to neighboring cells but the way to the insect is free — he can get there by jumping left 5 times.
In the third sample, the grasshopper can't make a sin... | 500 | [
{
"input": "5 2\n#G#T#",
"output": "YES"
},
{
"input": "6 1\nT....G",
"output": "YES"
},
{
"input": "7 3\nT..#..G",
"output": "NO"
},
{
"input": "6 2\n..GT..",
"output": "NO"
},
{
"input": "2 1\nGT",
"output": "YES"
},
{
"input": "100 5\nG####.####.###... | 1,580,588,508 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 0 | 233 | 2,150,400 | # find the relative position between G and T
# G needs to get to T
def solution(s, step):
# get idx of G and idx of T
return 'Yes'
if __name__ == '__main__':
n = int(input())
step = int(input())
print(n, step) | Title: Ostap and Grasshopper
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
On the way to Rio de Janeiro Ostap kills time playing with a grasshopper he took with him in a special box. Ostap builds a line of length *n* such that some cells of this line are empty and some contain obstacles.... | ```python
# find the relative position between G and T
# G needs to get to T
def solution(s, step):
# get idx of G and idx of T
return 'Yes'
if __name__ == '__main__':
n = int(input())
step = int(input())
print(n, step)
``` | -1 | |
988 | A | Diverse Team | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | There are $n$ students in a school class, the rating of the $i$-th student on Codehorses is $a_i$. You have to form a team consisting of $k$ students ($1 \le k \le n$) such that the ratings of all team members are distinct.
If it is impossible to form a suitable team, print "NO" (without quotes). Otherwise print "YES"... | The first line contains two integers $n$ and $k$ ($1 \le k \le n \le 100$) — the number of students and the size of the team you have to form.
The second line contains $n$ integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 100$), where $a_i$ is the rating of $i$-th student. | If it is impossible to form a suitable team, print "NO" (without quotes). Otherwise print "YES", and then print $k$ distinct integers from $1$ to $n$ which should be the indices of students in the team you form. All the ratings of the students in the team should be distinct. You may print the indices in any order. If t... | [
"5 3\n15 13 15 15 12\n",
"5 4\n15 13 15 15 12\n",
"4 4\n20 10 40 30\n"
] | [
"YES\n1 2 5 \n",
"NO\n",
"YES\n1 2 3 4 \n"
] | All possible answers for the first example:
- {1 2 5} - {2 3 5} - {2 4 5}
Note that the order does not matter. | 0 | [
{
"input": "5 3\n15 13 15 15 12",
"output": "YES\n1 2 5 "
},
{
"input": "5 4\n15 13 15 15 12",
"output": "NO"
},
{
"input": "4 4\n20 10 40 30",
"output": "YES\n1 2 3 4 "
},
{
"input": "1 1\n1",
"output": "YES\n1 "
},
{
"input": "100 53\n16 17 1 2 27 5 9 9 53 24 17... | 1,696,683,419 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 4 | 31 | 0 | n,k = [int(x) for x in input().split()]
a = [int(x) for x in input().split()]
c = 0
l = []
m = []
for i in range(len(a)):
if a[i] not in m:
m = m+[a[i]]
l = l+[i]
if len(l)>=k:
print('YES')
for j in l:
print(j+1,end=" ")
else:
print("NO")
| Title: Diverse Team
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There are $n$ students in a school class, the rating of the $i$-th student on Codehorses is $a_i$. You have to form a team consisting of $k$ students ($1 \le k \le n$) such that the ratings of all team members are distinct... | ```python
n,k = [int(x) for x in input().split()]
a = [int(x) for x in input().split()]
c = 0
l = []
m = []
for i in range(len(a)):
if a[i] not in m:
m = m+[a[i]]
l = l+[i]
if len(l)>=k:
print('YES')
for j in l:
print(j+1,end=" ")
else:
print("NO")
``` | 0 | |
507 | A | Amr and Music | PROGRAMMING | 1,000 | [
"greedy",
"implementation",
"sortings"
] | null | null | Amr is a young coder who likes music a lot. He always wanted to learn how to play music but he was busy coding so he got an idea.
Amr has *n* instruments, it takes *a**i* days to learn *i*-th instrument. Being busy, Amr dedicated *k* days to learn how to play the maximum possible number of instruments.
Amr asked for ... | The first line contains two numbers *n*, *k* (1<=≤<=*n*<=≤<=100, 0<=≤<=*k*<=≤<=10<=000), the number of instruments and number of days respectively.
The second line contains *n* integers *a**i* (1<=≤<=*a**i*<=≤<=100), representing number of days required to learn the *i*-th instrument. | In the first line output one integer *m* representing the maximum number of instruments Amr can learn.
In the second line output *m* space-separated integers: the indices of instruments to be learnt. You may output indices in any order.
if there are multiple optimal solutions output any. It is not necessary to use al... | [
"4 10\n4 3 1 2\n",
"5 6\n4 3 1 1 2\n",
"1 3\n4\n"
] | [
"4\n1 2 3 4",
"3\n1 3 4",
"0\n"
] | In the first test Amr can learn all 4 instruments.
In the second test other possible solutions are: {2, 3, 5} or {3, 4, 5}.
In the third test Amr doesn't have enough time to learn the only presented instrument. | 500 | [
{
"input": "4 10\n4 3 1 2",
"output": "4\n1 2 3 4"
},
{
"input": "5 6\n4 3 1 1 2",
"output": "3\n3 4 5"
},
{
"input": "1 3\n4",
"output": "0"
},
{
"input": "2 100\n100 100",
"output": "1\n1"
},
{
"input": "3 150\n50 50 50",
"output": "3\n1 2 3"
},
{
"i... | 1,596,179,420 | 2,147,483,647 | Python 3 | OK | TESTS | 39 | 109 | 6,963,200 | n,k=map(int,input().split())
l=list(map(int,input().split()))
c=0
p=max(l)
a=[]
while k>=0:
m=min(l)
if m==p+1:
break
k-=m
c+=1
if k<0:
c-=1
break
else:
i=l.index(m)
a.append(i+1)
l[i]=p+1
print(c)
print(*a)
| Title: Amr and Music
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Amr is a young coder who likes music a lot. He always wanted to learn how to play music but he was busy coding so he got an idea.
Amr has *n* instruments, it takes *a**i* days to learn *i*-th instrument. Being busy, Amr ... | ```python
n,k=map(int,input().split())
l=list(map(int,input().split()))
c=0
p=max(l)
a=[]
while k>=0:
m=min(l)
if m==p+1:
break
k-=m
c+=1
if k<0:
c-=1
break
else:
i=l.index(m)
a.append(i+1)
l[i]=p+1
print(c)
print(*a)
``` | 3 | |
115 | A | Party | PROGRAMMING | 900 | [
"dfs and similar",
"graphs",
"trees"
] | null | null | A company has *n* employees numbered from 1 to *n*. Each employee either has no immediate manager or exactly one immediate manager, who is another employee with a different number. An employee *A* is said to be the superior of another employee *B* if at least one of the following is true:
- Employee *A* is the immedi... | The first line contains integer *n* (1<=≤<=*n*<=≤<=2000) — the number of employees.
The next *n* lines contain the integers *p**i* (1<=≤<=*p**i*<=≤<=*n* or *p**i*<==<=-1). Every *p**i* denotes the immediate manager for the *i*-th employee. If *p**i* is -1, that means that the *i*-th employee does not have an immediate... | Print a single integer denoting the minimum number of groups that will be formed in the party. | [
"5\n-1\n1\n2\n1\n-1\n"
] | [
"3\n"
] | For the first example, three groups are sufficient, for example:
- Employee 1 - Employees 2 and 4 - Employees 3 and 5 | 500 | [
{
"input": "5\n-1\n1\n2\n1\n-1",
"output": "3"
},
{
"input": "4\n-1\n1\n2\n3",
"output": "4"
},
{
"input": "12\n-1\n1\n2\n3\n-1\n5\n6\n7\n-1\n9\n10\n11",
"output": "4"
},
{
"input": "6\n-1\n-1\n2\n3\n1\n1",
"output": "3"
},
{
"input": "3\n-1\n1\n1",
"output": ... | 1,666,434,975 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 1 | 92 | 0 | n=int(input())
a=[0]*n
for i in range(n):
j=int(input())
if j!=-1:
a[j-1]+=1
print(len(set(a))) | Title: Party
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A company has *n* employees numbered from 1 to *n*. Each employee either has no immediate manager or exactly one immediate manager, who is another employee with a different number. An employee *A* is said to be the superior of an... | ```python
n=int(input())
a=[0]*n
for i in range(n):
j=int(input())
if j!=-1:
a[j-1]+=1
print(len(set(a)))
``` | 0 | |
0 | none | none | none | 0 | [
"none"
] | null | null | You are given a sequence *a*1,<=*a*2,<=...,<=*a**n* consisting of different integers. It is required to split this sequence into the maximum number of subsequences such that after sorting integers in each of them in increasing order, the total sequence also will be sorted in increasing order.
Sorting integers in a sub... | The first line of input data contains integer *n* (1<=≤<=*n*<=≤<=105) — the length of the sequence.
The second line of input data contains *n* different integers *a*1,<=*a*2,<=...,<=*a**n* (<=-<=109<=≤<=*a**i*<=≤<=109) — the elements of the sequence. It is guaranteed that all elements of the sequence are distinct. | In the first line print the maximum number of subsequences *k*, which the original sequence can be split into while fulfilling the requirements.
In the next *k* lines print the description of subsequences in the following format: the number of elements in subsequence *c**i* (0<=<<=*c**i*<=≤<=*n*), then *c**i* integ... | [
"6\n3 2 1 6 5 4\n",
"6\n83 -75 -49 11 37 62\n"
] | [
"4\n2 1 3\n1 2\n2 4 6\n1 5\n",
"1\n6 1 2 3 4 5 6\n"
] | In the first sample output:
After sorting the first subsequence we will get sequence 1 2 3 6 5 4.
Sorting the second subsequence changes nothing.
After sorting the third subsequence we will get sequence 1 2 3 4 5 6.
Sorting the last subsequence changes nothing. | 0 | [
{
"input": "6\n3 2 1 6 5 4",
"output": "4\n2 1 3\n1 2\n2 4 6\n1 5"
},
{
"input": "6\n83 -75 -49 11 37 62",
"output": "1\n6 1 2 3 4 5 6"
},
{
"input": "1\n1",
"output": "1\n1 1"
},
{
"input": "2\n1 2",
"output": "2\n1 1\n1 2"
},
{
"input": "2\n2 1",
"output": "... | 1,503,600,524 | 8,024 | Python 3 | WRONG_ANSWER | PRETESTS | 0 | 61 | 0 |
n = int(input())
d = list(map(int, input().split()))
temp = d[:]
d.sort()
from bisect import bisect_left
A = [bisect_left(d,i) for i in temp]
del d,temp
f = [False]*len(A)
for i in range(n):
if not f[i]:
L = [i+1]
f[i] = True
j = A[i]
while j != i:
L.append(j+1)
... | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given a sequence *a*1,<=*a*2,<=...,<=*a**n* consisting of different integers. It is required to split this sequence into the maximum number of subsequences such that after sorting integers in each of them in increasing ord... | ```python
n = int(input())
d = list(map(int, input().split()))
temp = d[:]
d.sort()
from bisect import bisect_left
A = [bisect_left(d,i) for i in temp]
del d,temp
f = [False]*len(A)
for i in range(n):
if not f[i]:
L = [i+1]
f[i] = True
j = A[i]
while j != i:
L.append(... | 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"
},
... | 1,678,549,666 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | n=int(input())
a1=0;a2=0
# ll=(list(map(int,input().split(' '))))
if(n&1==0):a1=2;a2=n-2
else:a1=9;a2=n-9
| 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())
a1=0;a2=0
# ll=(list(map(int,input().split(' '))))
if(n&1==0):a1=2;a2=n-2
else:a1=9;a2=n-9
``` | 0 | |
0 | none | none | none | 0 | [
"none"
] | null | null | Вася купил стол, у которого *n* ножек. Каждая ножка состоит из двух частей, которые соединяются друг с другом. Каждая часть может быть произвольной положительной длины, но гарантируется, что из всех 2*n* частей возможно составить *n* ножек одинаковой длины. При составлении ножки любые две части могут быть соединены дру... | В первой строке задано число *n* (1<=≤<=*n*<=≤<=1000) — количество ножек у стола, купленного Васей.
Во второй строке следует последовательность из 2*n* целых положительных чисел *a*1,<=*a*2,<=...,<=*a*2*n* (1<=≤<=*a**i*<=≤<=100<=000) — длины частей ножек стола в произвольном порядке. | Выведите *n* строк по два целых числа в каждой — длины частей ножек, которые надо соединить друг с другом. Гарантируется, что всегда возможно собрать *n* ножек одинаковой длины. Если ответов несколько, разрешается вывести любой из них. | [
"3\n1 3 2 4 5 3\n",
"3\n1 1 1 2 2 2\n"
] | [
"1 5\n2 4\n3 3\n",
"1 2\n2 1\n1 2\n"
] | none | 0 | [
{
"input": "3\n1 3 2 4 5 3",
"output": "1 5\n2 4\n3 3"
},
{
"input": "3\n1 1 1 2 2 2",
"output": "1 2\n1 2\n1 2"
},
{
"input": "1\n3 7",
"output": "3 7"
},
{
"input": "10\n9 13 18 7 18 13 2 2 5 16 3 17 5 4 18 2 15 11 7 15",
"output": "2 18\n2 18\n2 18\n3 17\n4 16\n5 15\n5... | 1,458,746,421 | 1,221 | Python 3 | OK | TESTS | 57 | 77 | 5,222,400 | n = int(input())
box = list(map(int, input().split()))
e = sum(box)//2
box.sort()
for i in range(n):
print(str(box[0])+' '+str(box[-1]))
box.pop(0)
box.pop(-1)
| Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Вася купил стол, у которого *n* ножек. Каждая ножка состоит из двух частей, которые соединяются друг с другом. Каждая часть может быть произвольной положительной длины, но гарантируется, что из всех 2*n* частей возможно составить ... | ```python
n = int(input())
box = list(map(int, input().split()))
e = sum(box)//2
box.sort()
for i in range(n):
print(str(box[0])+' '+str(box[-1]))
box.pop(0)
box.pop(-1)
``` | 3 | |
846 | E | Chemistry in Berland | PROGRAMMING | 2,300 | [
"dfs and similar",
"greedy",
"trees"
] | null | null | Igor is a post-graduate student of chemistry faculty in Berland State University (BerSU). He needs to conduct a complicated experiment to write his thesis, but laboratory of BerSU doesn't contain all the materials required for this experiment.
Fortunately, chemical laws allow material transformations (yes, chemistry i... | The first line contains one integer number *n* (1<=≤<=*n*<=≤<=105) — the number of materials discovered by Berland chemists.
The second line contains *n* integer numbers *b*1,<=*b*2... *b**n* (1<=≤<=*b**i*<=≤<=1012) — supplies of BerSU laboratory.
The third line contains *n* integer numbers *a*1,<=*a*2... *a**n* (1<=... | Print YES if it is possible to conduct an experiment. Otherwise print NO. | [
"3\n1 2 3\n3 2 1\n1 1\n1 1\n",
"3\n3 2 1\n1 2 3\n1 1\n1 2\n"
] | [
"YES\n",
"NO\n"
] | none | 0 | [
{
"input": "3\n1 2 3\n3 2 1\n1 1\n1 1",
"output": "YES"
},
{
"input": "3\n3 2 1\n1 2 3\n1 1\n1 2",
"output": "NO"
},
{
"input": "5\n2 1 1 2 3\n1 2 2 2 1\n1 2\n1 3\n2 4\n1 4",
"output": "NO"
},
{
"input": "10\n2 8 6 1 2 7 6 9 2 8\n4 9 4 3 5 2 9 3 7 3\n1 8\n2 8\n3 8\n4 10\n5 1\... | 1,558,088,753 | 2,147,483,647 | PyPy 3 | MEMORY_LIMIT_EXCEEDED | TESTS | 5 | 1,294 | 268,390,400 | n = int(input())
a = list(map(int, input().split()))
b = list(map(int, input().split()))
k, p = [0], [0]
for i in range(n - 1):
aa, bb = map(int, input().split())
p.append(aa - 1)
k.append(bb)
for i in range(n):
a[i] -= b[i]
i = n - 1
while i > 0:
if a[i] < 0:
a[p[i]] += a[i] * ... | Title: Chemistry in Berland
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Igor is a post-graduate student of chemistry faculty in Berland State University (BerSU). He needs to conduct a complicated experiment to write his thesis, but laboratory of BerSU doesn't contain all the materials ... | ```python
n = int(input())
a = list(map(int, input().split()))
b = list(map(int, input().split()))
k, p = [0], [0]
for i in range(n - 1):
aa, bb = map(int, input().split())
p.append(aa - 1)
k.append(bb)
for i in range(n):
a[i] -= b[i]
i = n - 1
while i > 0:
if a[i] < 0:
a[p[i]] ... | 0 | |
393 | A | Nineteen | PROGRAMMING | 0 | [] | null | null | Alice likes word "nineteen" very much. She has a string *s* and wants the string to contain as many such words as possible. For that reason she can rearrange the letters of the string.
For example, if she has string "xiineteenppnnnewtnee", she can get string "xnineteenppnineteenw", containing (the occurrences marked) ... | The first line contains a non-empty string *s*, consisting only of lowercase English letters. The length of string *s* doesn't exceed 100. | Print a single integer — the maximum number of "nineteen"s that she can get in her string. | [
"nniinneetteeeenn\n",
"nneteenabcnneteenabcnneteenabcnneteenabcnneteenabcii\n",
"nineteenineteen\n"
] | [
"2",
"2",
"2"
] | none | 500 | [
{
"input": "nniinneetteeeenn",
"output": "2"
},
{
"input": "nneteenabcnneteenabcnneteenabcnneteenabcnneteenabcii",
"output": "2"
},
{
"input": "nineteenineteen",
"output": "2"
},
{
"input": "nssemsnnsitjtihtthij",
"output": "0"
},
{
"input": "eehihnttehtherjsihihn... | 1,676,889,841 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 58 | 62 | 0 | s = input()
n = s.count('n')
e = s.count('e')
i = s.count('i')
t = s.count('t')
count = min((int((n-1)/2)), i, (int(e//3)), t)
print(count) | Title: Nineteen
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Alice likes word "nineteen" very much. She has a string *s* and wants the string to contain as many such words as possible. For that reason she can rearrange the letters of the string.
For example, if she has string "xiinetee... | ```python
s = input()
n = s.count('n')
e = s.count('e')
i = s.count('i')
t = s.count('t')
count = min((int((n-1)/2)), i, (int(e//3)), t)
print(count)
``` | 3 | |
581 | A | Vasya the Hipster | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | One day Vasya the Hipster decided to count how many socks he had. It turned out that he had *a* red socks and *b* blue socks.
According to the latest fashion, hipsters should wear the socks of different colors: a red one on the left foot, a blue one on the right foot.
Every day Vasya puts on new socks in the morning ... | The single line of the input contains two positive integers *a* and *b* (1<=≤<=*a*,<=*b*<=≤<=100) — the number of red and blue socks that Vasya's got. | Print two space-separated integers — the maximum number of days when Vasya can wear different socks and the number of days when he can wear the same socks until he either runs out of socks or cannot make a single pair from the socks he's got.
Keep in mind that at the end of the day Vasya throws away the socks that he'... | [
"3 1\n",
"2 3\n",
"7 3\n"
] | [
"1 1\n",
"2 0\n",
"3 2\n"
] | In the first sample Vasya can first put on one pair of different socks, after that he has two red socks left to wear on the second day. | 500 | [
{
"input": "3 1",
"output": "1 1"
},
{
"input": "2 3",
"output": "2 0"
},
{
"input": "7 3",
"output": "3 2"
},
{
"input": "100 100",
"output": "100 0"
},
{
"input": "4 10",
"output": "4 3"
},
{
"input": "6 10",
"output": "6 2"
},
{
"input":... | 1,670,335,524 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 46 | 0 | a, b = [int(i) for i in input().split()]
diff, same = 0, 0
diff = min(a, b)
same = (max(a, b) - min (a, b)) // 2
print(diff, same) | Title: Vasya the Hipster
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day Vasya the Hipster decided to count how many socks he had. It turned out that he had *a* red socks and *b* blue socks.
According to the latest fashion, hipsters should wear the socks of different colors: a red... | ```python
a, b = [int(i) for i in input().split()]
diff, same = 0, 0
diff = min(a, b)
same = (max(a, b) - min (a, b)) // 2
print(diff, same)
``` | 3 | |
382 | A | Ksenia and Pan Scales | PROGRAMMING | 1,100 | [
"greedy",
"implementation"
] | null | null | Ksenia has ordinary pan scales and several weights of an equal mass. Ksenia has already put some weights on the scales, while other weights are untouched. Ksenia is now wondering whether it is possible to put all the remaining weights on the scales so that the scales were in equilibrium.
The scales is in equilibrium ... | The first line has a non-empty sequence of characters describing the scales. In this sequence, an uppercase English letter indicates a weight, and the symbol "|" indicates the delimiter (the character occurs in the sequence exactly once). All weights that are recorded in the sequence before the delimiter are initially ... | If you cannot put all the weights on the scales so that the scales were in equilibrium, print string "Impossible". Otherwise, print the description of the resulting scales, copy the format of the input.
If there are multiple answers, print any of them. | [
"AC|T\nL\n",
"|ABC\nXYZ\n",
"W|T\nF\n",
"ABC|\nD\n"
] | [
"AC|TL\n",
"XYZ|ABC\n",
"Impossible\n",
"Impossible\n"
] | none | 500 | [
{
"input": "AC|T\nL",
"output": "AC|TL"
},
{
"input": "|ABC\nXYZ",
"output": "XYZ|ABC"
},
{
"input": "W|T\nF",
"output": "Impossible"
},
{
"input": "ABC|\nD",
"output": "Impossible"
},
{
"input": "A|BC\nDEF",
"output": "ADF|BCE"
},
{
"input": "|\nABC",... | 1,619,733,562 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 4 | 46 | 0 | l, r = input().split('|')
extra = input()
if len(r) > len(l):
if len(extra) + len(l) == len(r):
print(f"{l}{extra}|{r}")
else:
print('Impossible')
elif len(r) < len(l):
if len(extra) + len(r) == len(l):
print(f"{l}|{r}{extra}")
else:
print('Impossible')
else:
print('I... | Title: Ksenia and Pan Scales
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Ksenia has ordinary pan scales and several weights of an equal mass. Ksenia has already put some weights on the scales, while other weights are untouched. Ksenia is now wondering whether it is possible to put all ... | ```python
l, r = input().split('|')
extra = input()
if len(r) > len(l):
if len(extra) + len(l) == len(r):
print(f"{l}{extra}|{r}")
else:
print('Impossible')
elif len(r) < len(l):
if len(extra) + len(r) == len(l):
print(f"{l}|{r}{extra}")
else:
print('Impossible')
else:
... | 0 | |
981 | A | Antipalindrome | PROGRAMMING | 900 | [
"brute force",
"implementation",
"strings"
] | null | null | A string is a palindrome if it reads the same from the left to the right and from the right to the left. For example, the strings "kek", "abacaba", "r" and "papicipap" are palindromes, while the strings "abb" and "iq" are not.
A substring $s[l \ldots r]$ ($1<=\leq<=l<=\leq<=r<=\leq<=|s|$) of a string $s<==<=s_{1}s_{2}... | The first line contains a non-empty string $s$ with length at most $50$ characters, containing lowercase English letters only. | If there is such a substring in $s$ that is not a palindrome, print the maximum length of such a substring. Otherwise print $0$.
Note that there can be multiple longest substrings that are not palindromes, but their length is unique. | [
"mew\n",
"wuffuw\n",
"qqqqqqqq\n"
] | [
"3\n",
"5\n",
"0\n"
] | "mew" is not a palindrome, so the longest substring of it that is not a palindrome, is the string "mew" itself. Thus, the answer for the first example is $3$.
The string "uffuw" is one of the longest non-palindrome substrings (of length $5$) of the string "wuffuw", so the answer for the second example is $5$.
All sub... | 500 | [
{
"input": "mew",
"output": "3"
},
{
"input": "wuffuw",
"output": "5"
},
{
"input": "qqqqqqqq",
"output": "0"
},
{
"input": "ijvji",
"output": "4"
},
{
"input": "iiiiiii",
"output": "0"
},
{
"input": "wobervhvvkihcuyjtmqhaaigvvgiaahqmtjyuchikvvhvrebow"... | 1,527,433,927 | 1,327 | Python 3 | OK | TESTS | 133 | 108 | 0 | s = input()
def check_palindrome(s):
return s == s[::-1]
def main(s):
i = 0
for i in range(len(s)):
if not check_palindrome(s[:len(s) - i]):
return len(s[:len(s) - i])
if not check_palindrome(s[i:]):
return len(s[i:])
return 0
print(main(s))... | Title: Antipalindrome
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A string is a palindrome if it reads the same from the left to the right and from the right to the left. For example, the strings "kek", "abacaba", "r" and "papicipap" are palindromes, while the strings "abb" and "iq" ar... | ```python
s = input()
def check_palindrome(s):
return s == s[::-1]
def main(s):
i = 0
for i in range(len(s)):
if not check_palindrome(s[:len(s) - i]):
return len(s[:len(s) - i])
if not check_palindrome(s[i:]):
return len(s[i:])
return 0
prin... | 3 | |
255 | A | Greg's Workout | PROGRAMMING | 800 | [
"implementation"
] | null | null | Greg is a beginner bodybuilder. Today the gym coach gave him the training plan. All it had was *n* integers *a*1,<=*a*2,<=...,<=*a**n*. These numbers mean that Greg needs to do exactly *n* exercises today. Besides, Greg should repeat the *i*-th in order exercise *a**i* times.
Greg now only does three types of exercise... | The first line contains integer *n* (1<=≤<=*n*<=≤<=20). The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=25) — the number of times Greg repeats the exercises. | Print word "chest" (without the quotes), if the chest gets the most exercise, "biceps" (without the quotes), if the biceps gets the most exercise and print "back" (without the quotes) if the back gets the most exercise.
It is guaranteed that the input is such that the answer to the problem is unambiguous. | [
"2\n2 8\n",
"3\n5 1 10\n",
"7\n3 3 2 7 9 6 8\n"
] | [
"biceps\n",
"back\n",
"chest\n"
] | In the first sample Greg does 2 chest, 8 biceps and zero back exercises, so the biceps gets the most exercises.
In the second sample Greg does 5 chest, 1 biceps and 10 back exercises, so the back gets the most exercises.
In the third sample Greg does 18 chest, 12 biceps and 8 back exercises, so the chest gets the mos... | 500 | [
{
"input": "2\n2 8",
"output": "biceps"
},
{
"input": "3\n5 1 10",
"output": "back"
},
{
"input": "7\n3 3 2 7 9 6 8",
"output": "chest"
},
{
"input": "4\n5 6 6 2",
"output": "chest"
},
{
"input": "5\n8 2 2 6 3",
"output": "chest"
},
{
"input": "6\n8 7 ... | 1,571,609,633 | 2,147,483,647 | Python 3 | OK | TESTS | 61 | 248 | 0 | a = int(input())
k = [0, 0, 0]
p = 0
x = list(map(int, input().split()))
for i in range(a):
if p == 3:
p = 0
k[p] += x[i]
p += 1
v = max(k[0], k[1], k[2])
if k[0] == v:
print('chest')
if k[1] == v:
print('biceps')
if k[2] == v:
print('back') | Title: Greg's Workout
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Greg is a beginner bodybuilder. Today the gym coach gave him the training plan. All it had was *n* integers *a*1,<=*a*2,<=...,<=*a**n*. These numbers mean that Greg needs to do exactly *n* exercises today. Besides, Greg ... | ```python
a = int(input())
k = [0, 0, 0]
p = 0
x = list(map(int, input().split()))
for i in range(a):
if p == 3:
p = 0
k[p] += x[i]
p += 1
v = max(k[0], k[1], k[2])
if k[0] == v:
print('chest')
if k[1] == v:
print('biceps')
if k[2] == v:
print('back')
``` | 3 | |
68 | B | Energy exchange | PROGRAMMING | 1,600 | [
"binary search"
] | B. Energy exchange | 2 | 256 | It is well known that the planet suffers from the energy crisis. Little Petya doesn't like that and wants to save the world. For this purpose he needs every accumulator to contain the same amount of energy. Initially every accumulator has some amount of energy: the *i*-th accumulator has *a**i* units of energy. Energy ... | First line of the input contains two integers *n* and *k* (1<=≤<=*n*<=≤<=10000,<=0<=≤<=*k*<=≤<=99) — number of accumulators and the percent of energy that is lost during transfers.
Next line contains *n* integers *a*1,<=*a*2,<=... ,<=*a**n* — amounts of energy in the first, second, .., *n*-th accumulator respectively ... | Output maximum possible amount of energy that can remain in each of accumulators after the transfers of energy.
The absolute or relative error in the answer should not exceed 10<=-<=6. | [
"3 50\n4 2 1\n",
"2 90\n1 11\n"
] | [
"2.000000000\n",
"1.909090909\n"
] | none | 1,000 | [
{
"input": "3 50\n4 2 1",
"output": "2.000000000"
},
{
"input": "2 90\n1 11",
"output": "1.909090909"
},
{
"input": "5 26\n42 65 23 43 64",
"output": "45.415178571"
},
{
"input": "5 45\n964 515 454 623 594",
"output": "594.109756098"
},
{
"input": "1 20\n784",
... | 1,524,051,584 | 2,147,483,647 | Python 3 | OK | TESTS | 42 | 840 | 7,680,000 | """
Created by Mohsen Naghipourfar on 4/18/18.
Email : [email protected]
Website: http://ce.sharif.edu/~naghipourfar
"""
def ok(value):
low, up = 0, 0
for i in range(n):
if a[i] < value:
low += value - a[i]
else:
up += a[i] - value
return... | Title: Energy exchange
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
It is well known that the planet suffers from the energy crisis. Little Petya doesn't like that and wants to save the world. For this purpose he needs every accumulator to contain the same amount of energy. Initially every ... | ```python
"""
Created by Mohsen Naghipourfar on 4/18/18.
Email : [email protected]
Website: http://ce.sharif.edu/~naghipourfar
"""
def ok(value):
low, up = 0, 0
for i in range(n):
if a[i] < value:
low += value - a[i]
else:
up += a[i] - value
... | 3.775695 |
259 | B | Little Elephant and Magic Square | PROGRAMMING | 1,100 | [
"brute force",
"implementation"
] | null | null | Little Elephant loves magic squares very much.
A magic square is a 3<=×<=3 table, each cell contains some positive integer. At that the sums of integers in all rows, columns and diagonals of the table are equal. The figure below shows the magic square, the sum of integers in all its rows, columns and diagonals equals ... | The first three lines of the input contain the Little Elephant's notes. The first line contains elements of the first row of the magic square. The second line contains the elements of the second row, the third line is for the third row. The main diagonal elements that have been forgotten by the Elephant are represented... | Print three lines, in each line print three integers — the Little Elephant's magic square. If there are multiple magic squares, you are allowed to print any of them. Note that all numbers you print must be positive and not exceed 105.
It is guaranteed that there exists at least one magic square that meets the conditio... | [
"0 1 1\n1 0 1\n1 1 0\n",
"0 3 6\n5 0 5\n4 7 0\n"
] | [
"1 1 1\n1 1 1\n1 1 1\n",
"6 3 6\n5 5 5\n4 7 4\n"
] | none | 1,000 | [
{
"input": "0 1 1\n1 0 1\n1 1 0",
"output": "1 1 1\n1 1 1\n1 1 1"
},
{
"input": "0 3 6\n5 0 5\n4 7 0",
"output": "6 3 6\n5 5 5\n4 7 4"
},
{
"input": "0 4 4\n4 0 4\n4 4 0",
"output": "4 4 4\n4 4 4\n4 4 4"
},
{
"input": "0 54 48\n36 0 78\n66 60 0",
"output": "69 54 48\n36 5... | 1,623,435,290 | 2,147,483,647 | PyPy 3 | OK | TESTS | 24 | 216 | 0 | def magic_square(a):
ans =[ row[:] for row in a]
ans[0][0] = (sum(a[2]) + sum(a[1]) - sum(a[0]))//2
ans[1][1] = (sum(a[2]) + sum(a[0]) - sum(a[1])) // 2
ans[2][2] = (sum(a[0]) + sum(a[1]) - sum(a[2])) // 2
return ans
if __name__ == '__main__':
a = []
for i in range(3):
... | Title: Little Elephant and Magic Square
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little Elephant loves magic squares very much.
A magic square is a 3<=×<=3 table, each cell contains some positive integer. At that the sums of integers in all rows, columns and diagonals of the table ... | ```python
def magic_square(a):
ans =[ row[:] for row in a]
ans[0][0] = (sum(a[2]) + sum(a[1]) - sum(a[0]))//2
ans[1][1] = (sum(a[2]) + sum(a[0]) - sum(a[1])) // 2
ans[2][2] = (sum(a[0]) + sum(a[1]) - sum(a[2])) // 2
return ans
if __name__ == '__main__':
a = []
for i in range(... | 3 | |
621 | A | Wet Shark and Odd and Even | PROGRAMMING | 900 | [
"implementation"
] | null | null | Today, Wet Shark is given *n* integers. Using any of these integers no more than once, Wet Shark wants to get maximum possible even (divisible by 2) sum. Please, calculate this value for Wet Shark.
Note, that if Wet Shark uses no integers from the *n* integers, the sum is an even integer 0. | The first line of the input contains one integer, *n* (1<=≤<=*n*<=≤<=100<=000). The next line contains *n* space separated integers given to Wet Shark. Each of these integers is in range from 1 to 109, inclusive. | Print the maximum possible even sum that can be obtained if we use some of the given integers. | [
"3\n1 2 3\n",
"5\n999999999 999999999 999999999 999999999 999999999\n"
] | [
"6",
"3999999996"
] | In the first sample, we can simply take all three integers for a total sum of 6.
In the second sample Wet Shark should take any four out of five integers 999 999 999. | 500 | [
{
"input": "3\n1 2 3",
"output": "6"
},
{
"input": "5\n999999999 999999999 999999999 999999999 999999999",
"output": "3999999996"
},
{
"input": "1\n1",
"output": "0"
},
{
"input": "15\n39 52 88 78 46 95 84 98 55 3 68 42 6 18 98",
"output": "870"
},
{
"input": "15\... | 1,539,684,539 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 8 | 217 | 13,107,200 | n = int(input())
a = list(map(int,input().split()))
a.sort(); k = 0
if sum(a) % 2 == 0: print(sum(a)); exit()
else:
for i in range(len(a),0,-1):
b = a[0:i]
if sum(b) % 2 == 0:
print(sum(b))
exit()
for i in range(len(a)):
if a[i] % 2 == 0: k += a[i]
print(k) | Title: Wet Shark and Odd and Even
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Today, Wet Shark is given *n* integers. Using any of these integers no more than once, Wet Shark wants to get maximum possible even (divisible by 2) sum. Please, calculate this value for Wet Shark.
Note, th... | ```python
n = int(input())
a = list(map(int,input().split()))
a.sort(); k = 0
if sum(a) % 2 == 0: print(sum(a)); exit()
else:
for i in range(len(a),0,-1):
b = a[0:i]
if sum(b) % 2 == 0:
print(sum(b))
exit()
for i in range(len(a)):
if a[i] % 2 == 0: k += a[i]
... | 0 | |
20 | C | Dijkstra? | PROGRAMMING | 1,900 | [
"graphs",
"shortest paths"
] | C. Dijkstra? | 1 | 64 | You are given a weighted undirected graph. The vertices are enumerated from 1 to *n*. Your task is to find the shortest path between the vertex 1 and the vertex *n*. | The first line contains two integers *n* and *m* (2<=≤<=*n*<=≤<=105,<=0<=≤<=*m*<=≤<=105), where *n* is the number of vertices and *m* is the number of edges. Following *m* lines contain one edge each in form *a**i*, *b**i* and *w**i* (1<=≤<=*a**i*,<=*b**i*<=≤<=*n*,<=1<=≤<=*w**i*<=≤<=106), where *a**i*,<=*b**i* are edge... | Write the only integer -1 in case of no path. Write the shortest path in opposite case. If there are many solutions, print any of them. | [
"5 6\n1 2 2\n2 5 5\n2 3 4\n1 4 1\n4 3 3\n3 5 1\n",
"5 6\n1 2 2\n2 5 5\n2 3 4\n1 4 1\n4 3 3\n3 5 1\n"
] | [
"1 4 3 5 ",
"1 4 3 5 "
] | none | 1,500 | [
{
"input": "5 6\n1 2 2\n2 5 5\n2 3 4\n1 4 1\n4 3 3\n3 5 1",
"output": "1 4 3 5 "
},
{
"input": "5 6\n1 2 2\n2 5 5\n2 3 4\n1 4 1\n4 3 3\n3 5 1",
"output": "1 4 3 5 "
},
{
"input": "2 1\n1 2 1",
"output": "1 2 "
},
{
"input": "3 1\n1 2 1",
"output": "-1"
},
{
"input... | 1,662,630,332 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | import math
import heapq
import numpy as np
input_1 = input().split()
[n, m] = list(map(int, input_1))
graph = {key: [] for key in range(1, n+1)}
for i in range(m):
input_2 = input().split()
edge = list(map(int, input_2))
graph[edge[0]].append((edge[1], edge[2]))
graph[edge[1]].append((edg... | 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
import math
import heapq
import numpy as np
input_1 = input().split()
[n, m] = list(map(int, input_1))
graph = {key: [] for key in range(1, n+1)}
for i in range(m):
input_2 = input().split()
edge = list(map(int, input_2))
graph[edge[0]].append((edge[1], edge[2]))
graph[edge[1]].a... | -1 |
112 | A | Petya and Strings | PROGRAMMING | 800 | [
"implementation",
"strings"
] | A. Petya and Strings | 2 | 256 | Little Petya loves presents. His mum bought him two strings of the same size for his birthday. The strings consist of uppercase and lowercase Latin letters. Now Petya wants to compare those two strings lexicographically. The letters' case does not matter, that is an uppercase letter is considered equivalent to the corr... | Each of the first two lines contains a bought string. The strings' lengths range from 1 to 100 inclusive. It is guaranteed that the strings are of the same length and also consist of uppercase and lowercase Latin letters. | If the first string is less than the second one, print "-1". If the second string is less than the first one, print "1". If the strings are equal, print "0". Note that the letters' case is not taken into consideration when the strings are compared. | [
"aaaa\naaaA\n",
"abs\nAbz\n",
"abcdefg\nAbCdEfF\n"
] | [
"0\n",
"-1\n",
"1\n"
] | If you want more formal information about the lexicographical order (also known as the "dictionary order" or "alphabetical order"), you can visit the following site:
- http://en.wikipedia.org/wiki/Lexicographical_order | 500 | [
{
"input": "aaaa\naaaA",
"output": "0"
},
{
"input": "abs\nAbz",
"output": "-1"
},
{
"input": "abcdefg\nAbCdEfF",
"output": "1"
},
{
"input": "asadasdasd\nasdwasdawd",
"output": "-1"
},
{
"input": "aslkjlkasdd\nasdlkjdajwi",
"output": "1"
},
{
"input":... | 1,697,315,244 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 53 | 154 | 0 | x = (input()).lower()
y = (input()).lower()
if x == y:
print(0)
elif x < y:
print(-1)
else:
print(1)
| Title: Petya and Strings
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Little Petya loves presents. His mum bought him two strings of the same size for his birthday. The strings consist of uppercase and lowercase Latin letters. Now Petya wants to compare those two strings lexicographically. ... | ```python
x = (input()).lower()
y = (input()).lower()
if x == y:
print(0)
elif x < y:
print(-1)
else:
print(1)
``` | 3.9615 |
58 | A | Chat room | PROGRAMMING | 1,000 | [
"greedy",
"strings"
] | A. Chat room | 1 | 256 | Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letters can be deleted from the typed word so that it resulted in the word "hello". For example, ... | The first and only line contains the word *s*, which Vasya typed. This word consisits of small Latin letters, its length is no less that 1 and no more than 100 letters. | If Vasya managed to say hello, print "YES", otherwise print "NO". | [
"ahhellllloou\n",
"hlelo\n"
] | [
"YES\n",
"NO\n"
] | none | 500 | [
{
"input": "ahhellllloou",
"output": "YES"
},
{
"input": "hlelo",
"output": "NO"
},
{
"input": "helhcludoo",
"output": "YES"
},
{
"input": "hehwelloho",
"output": "YES"
},
{
"input": "pnnepelqomhhheollvlo",
"output": "YES"
},
{
"input": "tymbzjyqhymeda... | 1,682,508,407 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 31 | 0 | s=input()
L=s.split()
flag1,flag2,flag3,flag4,flag5=False,False,False,False,True
if "h" in s and L.count("h")>=1:
flag1=True
if "e" in s and L.count("e")>=1:
flag2=True
if "l" in s and L.count("l")>=2:
flag3=True
if "o" in s and L.count("o")>=1:
flag4=True
if len(s)<=5:
flag5=False
if flag1==True and ... | Title: Chat room
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letter... | ```python
s=input()
L=s.split()
flag1,flag2,flag3,flag4,flag5=False,False,False,False,True
if "h" in s and L.count("h")>=1:
flag1=True
if "e" in s and L.count("e")>=1:
flag2=True
if "l" in s and L.count("l")>=2:
flag3=True
if "o" in s and L.count("o")>=1:
flag4=True
if len(s)<=5:
flag5=False
if flag1=... | 0 |
624 | A | Save Luke | PROGRAMMING | 800 | [
"math"
] | null | null | Luke Skywalker got locked up in a rubbish shredder between two presses. R2D2 is already working on his rescue, but Luke needs to stay alive as long as possible. For simplicity we will assume that everything happens on a straight line, the presses are initially at coordinates 0 and *L*, and they move towards each other ... | The first line of the input contains four integers *d*, *L*, *v*1, *v*2 (1<=≤<=*d*,<=*L*,<=*v*1,<=*v*2<=≤<=10<=000,<=*d*<=<<=*L*) — Luke's width, the initial position of the second press and the speed of the first and second presses, respectively. | Print a single real value — the maximum period of time Luke can stay alive for. Your answer will be considered correct if its absolute or relative error does not exceed 10<=-<=6.
Namely: let's assume that your answer is *a*, and the answer of the jury is *b*. The checker program will consider your answer correct, if ... | [
"2 6 2 2\n",
"1 9 1 2\n"
] | [
"1.00000000000000000000\n",
"2.66666666666666650000\n"
] | In the first sample Luke should stay exactly in the middle of the segment, that is at coordinates [2;4], as the presses move with the same speed.
In the second sample he needs to occupy the position <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/71395c777960eaded59a9fdc428a9625f152605b.pn... | 500 | [
{
"input": "2 6 2 2",
"output": "1.00000000000000000000"
},
{
"input": "1 9 1 2",
"output": "2.66666666666666650000"
},
{
"input": "1 10000 1 1",
"output": "4999.50000000000000000000"
},
{
"input": "9999 10000 10000 10000",
"output": "0.00005000000000000000"
},
{
... | 1,454,612,143 | 6,643 | Python 3 | OK | TESTS | 30 | 62 | 0 | d,L,v1,v2 = list(map(int,input().split(" ")))
x=L-d
y=v1+v2
ans=x/y
print("%0.6f" %(ans)) | Title: Save Luke
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Luke Skywalker got locked up in a rubbish shredder between two presses. R2D2 is already working on his rescue, but Luke needs to stay alive as long as possible. For simplicity we will assume that everything happens on a strai... | ```python
d,L,v1,v2 = list(map(int,input().split(" ")))
x=L-d
y=v1+v2
ans=x/y
print("%0.6f" %(ans))
``` | 3 |
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