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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
448 | A | Rewards | PROGRAMMING | 800 | [
"implementation"
] | null | null | Bizon the Champion is called the Champion for a reason.
Bizon the Champion has recently got a present — a new glass cupboard with *n* shelves and he decided to put all his presents there. All the presents can be divided into two types: medals and cups. Bizon the Champion has *a*1 first prize cups, *a*2 second prize c... | The first line contains integers *a*1, *a*2 and *a*3 (0<=≤<=*a*1,<=*a*2,<=*a*3<=≤<=100). The second line contains integers *b*1, *b*2 and *b*3 (0<=≤<=*b*1,<=*b*2,<=*b*3<=≤<=100). The third line contains integer *n* (1<=≤<=*n*<=≤<=100).
The numbers in the lines are separated by single spaces. | Print "YES" (without the quotes) if all the rewards can be put on the shelves in the described manner. Otherwise, print "NO" (without the quotes). | [
"1 1 1\n1 1 1\n4\n",
"1 1 3\n2 3 4\n2\n",
"1 0 0\n1 0 0\n1\n"
] | [
"YES\n",
"YES\n",
"NO\n"
] | none | 500 | [
{
"input": "1 1 1\n1 1 1\n4",
"output": "YES"
},
{
"input": "1 1 3\n2 3 4\n2",
"output": "YES"
},
{
"input": "1 0 0\n1 0 0\n1",
"output": "NO"
},
{
"input": "0 0 0\n0 0 0\n1",
"output": "YES"
},
{
"input": "100 100 100\n100 100 100\n100",
"output": "YES"
},
... | 1,645,578,383 | 2,147,483,647 | Python 3 | OK | TESTS | 25 | 46 | 0 | import math
a, b, c = map(int, input().split(" "))
q, w, e = map(int, input().split(" "))
p = int(input())
a = a+b+c
b = q+w+e
a = math.ceil(a/5)
b = math.ceil(b/10)
if a+b<=p:
print('YES')
else:
print('NO') | Title: Rewards
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Bizon the Champion is called the Champion for a reason.
Bizon the Champion has recently got a present — a new glass cupboard with *n* shelves and he decided to put all his presents there. All the presents can be divided into ... | ```python
import math
a, b, c = map(int, input().split(" "))
q, w, e = map(int, input().split(" "))
p = int(input())
a = a+b+c
b = q+w+e
a = math.ceil(a/5)
b = math.ceil(b/10)
if a+b<=p:
print('YES')
else:
print('NO')
``` | 3 | |
177 | A1 | Good Matrix Elements | PROGRAMMING | 800 | [
"implementation"
] | null | null | The Smart Beaver from ABBYY got hooked on square matrices. Now he is busy studying an *n*<=×<=*n* size matrix, where *n* is odd. The Smart Beaver considers the following matrix elements good:
- Elements of the main diagonal. - Elements of the secondary diagonal. - Elements of the "middle" row — the row which ha... | The first line of input data contains a single odd integer *n*. Each of the next *n* lines contains *n* integers *a**ij* (0<=≤<=*a**ij*<=≤<=100) separated by single spaces — the elements of the given matrix.
The input limitations for getting 30 points are:
- 1<=≤<=*n*<=≤<=5
The input limitations for getting 100 po... | Print a single integer — the sum of good matrix elements. | [
"3\n1 2 3\n4 5 6\n7 8 9\n",
"5\n1 1 1 1 1\n1 1 1 1 1\n1 1 1 1 1\n1 1 1 1 1\n1 1 1 1 1\n"
] | [
"45\n",
"17\n"
] | In the first sample all matrix elements will be good. Good elements in the second sample are shown on the figure. | 30 | [
{
"input": "3\n1 2 3\n4 5 6\n7 8 9",
"output": "45"
},
{
"input": "5\n1 1 1 1 1\n1 1 1 1 1\n1 1 1 1 1\n1 1 1 1 1\n1 1 1 1 1",
"output": "17"
},
{
"input": "1\n3",
"output": "3"
},
{
"input": "5\n27 7 3 11 72\n19 49 68 19 59\n41 25 37 64 65\n8 39 96 62 90\n13 37 43 26 33",
... | 1,695,047,415 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS1 | 0 | 92 | 0 | k=int(input())
list1=[]
sum=0
for i in range(k):
rows=list(map(int ,input().split()))
list1.append(rows)
for j in list1[int((k+1)/2)-1]:
sum+=j
for l in range(k):
sum+=list1[l][int((k+1)/2)-1]
sum+=list1[l][l]
sum+=list1[l][k-l-1]
print(sum-(3*list1[int((k+1... | Title: Good Matrix Elements
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Smart Beaver from ABBYY got hooked on square matrices. Now he is busy studying an *n*<=×<=*n* size matrix, where *n* is odd. The Smart Beaver considers the following matrix elements good:
- Elements of the ... | ```python
k=int(input())
list1=[]
sum=0
for i in range(k):
rows=list(map(int ,input().split()))
list1.append(rows)
for j in list1[int((k+1)/2)-1]:
sum+=j
for l in range(k):
sum+=list1[l][int((k+1)/2)-1]
sum+=list1[l][l]
sum+=list1[l][k-l-1]
print(sum-(3*list... | 0 | |
5 | C | Longest Regular Bracket Sequence | PROGRAMMING | 1,900 | [
"constructive algorithms",
"data structures",
"dp",
"greedy",
"sortings",
"strings"
] | C. Longest Regular Bracket Sequence | 2 | 256 | This is yet another problem dealing with regular bracket sequences.
We should remind you that a bracket sequence is called regular, if by inserting «+» and «1» into it we can get a correct mathematical expression. For example, sequences «(())()», «()» and «(()(()))» are regular, while «)(», «(()» and «(()))(» are not.... | The first line of the input file contains a non-empty string, consisting of «(» and «)» characters. Its length does not exceed 106. | Print the length of the longest substring that is a regular bracket sequence, and the number of such substrings. If there are no such substrings, write the only line containing "0 1". | [
")((())))(()())\n",
"))(\n"
] | [
"6 2\n",
"0 1\n"
] | none | 0 | [
{
"input": ")((())))(()())",
"output": "6 2"
},
{
"input": "))(",
"output": "0 1"
},
{
"input": "()(())()",
"output": "8 1"
},
{
"input": "((((()(((",
"output": "2 1"
},
{
"input": "))))()())))",
"output": "4 1"
},
{
"input": "(()())()(())()()())())()(... | 1,531,223,673 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 216 | 0 | """
Codeforces
5C - Longest Regular Bracket Sequence
http://codeforces.com/contest/5/problem/C
Héctor González Belver
../07/2018
"""
import sys
#longest substring!!
def main():
pattern = sys.stdin.readline().strip()
max_length = 0
substring_start = 1
#stack
#-->the first element: index before the beginn... | Title: Longest Regular Bracket Sequence
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
This is yet another problem dealing with regular bracket sequences.
We should remind you that a bracket sequence is called regular, if by inserting «+» and «1» into it we can get a correct mathematical exp... | ```python
"""
Codeforces
5C - Longest Regular Bracket Sequence
http://codeforces.com/contest/5/problem/C
Héctor González Belver
../07/2018
"""
import sys
#longest substring!!
def main():
pattern = sys.stdin.readline().strip()
max_length = 0
substring_start = 1
#stack
#-->the first element: index before ... | 0 |
361 | A | Levko and Table | PROGRAMMING | 800 | [
"constructive algorithms",
"implementation"
] | null | null | Levko loves tables that consist of *n* rows and *n* columns very much. He especially loves beautiful tables. A table is beautiful to Levko if the sum of elements in each row and column of the table equals *k*.
Unfortunately, he doesn't know any such table. Your task is to help him to find at least one of them. | The single line contains two integers, *n* and *k* (1<=≤<=*n*<=≤<=100, 1<=≤<=*k*<=≤<=1000). | Print any beautiful table. Levko doesn't like too big numbers, so all elements of the table mustn't exceed 1000 in their absolute value.
If there are multiple suitable tables, you are allowed to print any of them. | [
"2 4\n",
"4 7\n"
] | [
"1 3\n3 1\n",
"2 1 0 4\n4 0 2 1\n1 3 3 0\n0 3 2 2\n"
] | In the first sample the sum in the first row is 1 + 3 = 4, in the second row — 3 + 1 = 4, in the first column — 1 + 3 = 4 and in the second column — 3 + 1 = 4. There are other beautiful tables for this sample.
In the second sample the sum of elements in each row and each column equals 7. Besides, there are other table... | 500 | [
{
"input": "2 4",
"output": "4 0 \n0 4 "
},
{
"input": "4 7",
"output": "7 0 0 0 \n0 7 0 0 \n0 0 7 0 \n0 0 0 7 "
},
{
"input": "1 8",
"output": "8 "
},
{
"input": "9 3",
"output": "3 0 0 0 0 0 0 0 0 \n0 3 0 0 0 0 0 0 0 \n0 0 3 0 0 0 0 0 0 \n0 0 0 3 0 0 0 0 0 \n0 0 0 0 3 0... | 1,615,900,412 | 2,147,483,647 | Python 3 | OK | TESTS | 22 | 77 | 0 | n,m=[int(x) for x in input().split()]
n-=1
for i in range(n+1):
print('0 '*i+str(m)+' 0'*(n-i)) | Title: Levko and Table
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Levko loves tables that consist of *n* rows and *n* columns very much. He especially loves beautiful tables. A table is beautiful to Levko if the sum of elements in each row and column of the table equals *k*.
Unfortun... | ```python
n,m=[int(x) for x in input().split()]
n-=1
for i in range(n+1):
print('0 '*i+str(m)+' 0'*(n-i))
``` | 3 | |
587 | A | Duff and Weight Lifting | PROGRAMMING | 1,500 | [
"greedy"
] | null | null | Recently, Duff has been practicing weight lifting. As a hard practice, Malek gave her a task. He gave her a sequence of weights. Weight of *i*-th of them is 2*w**i* pounds. In each step, Duff can lift some of the remaining weights and throw them away. She does this until there's no more weight left. Malek asked her to ... | The first line of input contains integer *n* (1<=≤<=*n*<=≤<=106), the number of weights.
The second line contains *n* integers *w*1,<=...,<=*w**n* separated by spaces (0<=≤<=*w**i*<=≤<=106 for each 1<=≤<=*i*<=≤<=*n*), the powers of two forming the weights values. | Print the minimum number of steps in a single line. | [
"5\n1 1 2 3 3\n",
"4\n0 1 2 3\n"
] | [
"2\n",
"4\n"
] | In the first sample case: One optimal way would be to throw away the first three in the first step and the rest in the second step. Also, it's not possible to do it in one step because their sum is not a power of two.
In the second sample case: The only optimal way is to throw away one weight in each step. It's not po... | 500 | [
{
"input": "5\n1 1 2 3 3",
"output": "2"
},
{
"input": "4\n0 1 2 3",
"output": "4"
},
{
"input": "1\n120287",
"output": "1"
},
{
"input": "2\n28288 0",
"output": "2"
},
{
"input": "2\n95745 95745",
"output": "1"
},
{
"input": "13\n92 194 580495 0 10855... | 1,453,498,643 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 35 | 655 | 51,916,800 | def main():
input()
l = [0] * 1000001
for w in map(int, input().split()):
l[w] += 1
for w, x in enumerate(l):
if x:
l[w] = x & 1
while x:
x >>= 1
w += 1
if x & 1:
l[w] += 1
print(sum(l))
if ... | Title: Duff and Weight Lifting
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Recently, Duff has been practicing weight lifting. As a hard practice, Malek gave her a task. He gave her a sequence of weights. Weight of *i*-th of them is 2*w**i* pounds. In each step, Duff can lift some of th... | ```python
def main():
input()
l = [0] * 1000001
for w in map(int, input().split()):
l[w] += 1
for w, x in enumerate(l):
if x:
l[w] = x & 1
while x:
x >>= 1
w += 1
if x & 1:
l[w] += 1
print(sum... | -1 | |
499 | B | Lecture | PROGRAMMING | 1,000 | [
"implementation",
"strings"
] | null | null | You have a new professor of graph theory and he speaks very quickly. You come up with the following plan to keep up with his lecture and make notes.
You know two languages, and the professor is giving the lecture in the first one. The words in both languages consist of lowercase English characters, each language consi... | The first line contains two integers, *n* and *m* (1<=≤<=*n*<=≤<=3000, 1<=≤<=*m*<=≤<=3000) — the number of words in the professor's lecture and the number of words in each of these languages.
The following *m* lines contain the words. The *i*-th line contains two strings *a**i*, *b**i* meaning that the word *a**i* bel... | Output exactly *n* words: how you will record the lecture in your notebook. Output the words of the lecture in the same order as in the input. | [
"4 3\ncodeforces codesecrof\ncontest round\nletter message\ncodeforces contest letter contest\n",
"5 3\njoll wuqrd\neuzf un\nhbnyiyc rsoqqveh\nhbnyiyc joll joll euzf joll\n"
] | [
"codeforces round letter round\n",
"hbnyiyc joll joll un joll\n"
] | none | 500 | [
{
"input": "4 3\ncodeforces codesecrof\ncontest round\nletter message\ncodeforces contest letter contest",
"output": "codeforces round letter round"
},
{
"input": "5 3\njoll wuqrd\neuzf un\nhbnyiyc rsoqqveh\nhbnyiyc joll joll euzf joll",
"output": "hbnyiyc joll joll un joll"
},
{
"input"... | 1,688,673,678 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 37 | 218 | 9,420,800 | def get_mini(word, first, second):
temp = ''
if word in first:
ind = first.index(word)
if len(second[ind]) > len(word):
temp = word
elif len(second[ind]) == len(word):
temp = word
else:
temp = second[ind]
elif word in second:
... | Title: Lecture
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You have a new professor of graph theory and he speaks very quickly. You come up with the following plan to keep up with his lecture and make notes.
You know two languages, and the professor is giving the lecture in the first ... | ```python
def get_mini(word, first, second):
temp = ''
if word in first:
ind = first.index(word)
if len(second[ind]) > len(word):
temp = word
elif len(second[ind]) == len(word):
temp = word
else:
temp = second[ind]
elif word in se... | 3 | |
358 | B | Dima and Text Messages | PROGRAMMING | 1,500 | [
"brute force",
"strings"
] | null | null | Seryozha has a very changeable character. This time he refused to leave the room to Dima and his girlfriend (her hame is Inna, by the way). However, the two lovebirds can always find a way to communicate. Today they are writing text messages to each other.
Dima and Inna are using a secret code in their text messages. ... | The first line contains integer *n* (1<=≤<=*n*<=≤<=105) — the number of words in Dima's message. Next *n* lines contain non-empty words, one word per line. The words only consist of small English letters. The total length of all words doesn't exceed 105.
The last line contains non-empty text message that Inna has got... | In a single line, print "yes" (without the quotes), if Dima decoded the text message correctly, and "no" (without the quotes) otherwise. | [
"3\ni\nlove\nyou\n<3i<3love<23you<3\n",
"7\ni\nam\nnot\nmain\nin\nthe\nfamily\n<3i<>3am<3the<3<main<3in<3the<3><3family<3\n"
] | [
"yes\n",
"no\n"
] | Please note that Dima got a good old kick in the pants for the second sample from the statement. | 1,000 | [
{
"input": "3\ni\nlove\nyou\n<3i<3love<23you<3",
"output": "yes"
},
{
"input": "7\ni\nam\nnot\nmain\nin\nthe\nfamily\n<3i<>3am<3the<3<main<3in<3the<3><3family<3",
"output": "no"
},
{
"input": "3\ni\nlove\nyou\n<3i<3lo<3ve<3y<<<<<<<ou3<3",
"output": "yes"
},
{
"input": "4\na\n... | 1,582,444,310 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 6 | 2,000 | 1,126,400 | #短信
import re
string0 = '<3'
n = int(input().split()[0])
for i in range(n):
string0 += input().split()[0] + '<3'
string1 = '^'+'[0-9a-zA-Z<>]*'.join(string0)+'$'
string = input().split()[0]
if re.match(string1,string): print('yes')
else: print('no')
| Title: Dima and Text Messages
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Seryozha has a very changeable character. This time he refused to leave the room to Dima and his girlfriend (her hame is Inna, by the way). However, the two lovebirds can always find a way to communicate. Today t... | ```python
#短信
import re
string0 = '<3'
n = int(input().split()[0])
for i in range(n):
string0 += input().split()[0] + '<3'
string1 = '^'+'[0-9a-zA-Z<>]*'.join(string0)+'$'
string = input().split()[0]
if re.match(string1,string): print('yes')
else: print('no')
``` | 0 | |
47 | A | Triangular numbers | PROGRAMMING | 800 | [
"brute force",
"math"
] | A. Triangular numbers | 2 | 256 | A triangular number is the number of dots in an equilateral triangle uniformly filled with dots. For example, three dots can be arranged in a triangle; thus three is a triangular number. The *n*-th triangular number is the number of dots in a triangle with *n* dots on a side. . You can learn more about these numbers fr... | The first line contains the single number *n* (1<=≤<=*n*<=≤<=500) — the given integer. | If the given integer is a triangular number output YES, otherwise output NO. | [
"1\n",
"2\n",
"3\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | none | 500 | [
{
"input": "1",
"output": "YES"
},
{
"input": "2",
"output": "NO"
},
{
"input": "3",
"output": "YES"
},
{
"input": "4",
"output": "NO"
},
{
"input": "5",
"output": "NO"
},
{
"input": "6",
"output": "YES"
},
{
"input": "7",
"output": "NO... | 1,652,255,179 | 2,147,483,647 | Python 3 | OK | TESTS | 71 | 92 | 0 | m = int(input())
a = 0
n = 1
while a + n < m:
a += n
n += 1
if a + n == m:print('YES')
else:print('NO')
| Title: Triangular numbers
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
A triangular number is the number of dots in an equilateral triangle uniformly filled with dots. For example, three dots can be arranged in a triangle; thus three is a triangular number. The *n*-th triangular number is t... | ```python
m = int(input())
a = 0
n = 1
while a + n < m:
a += n
n += 1
if a + n == m:print('YES')
else:print('NO')
``` | 3.977 |
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"... | 1,638,801,457 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 32 | 218 | 0 | import sys
import math
def II():
return int(sys.stdin.readline())
def LI():
return list(map(int, sys.stdin.readline().split()))
def MI():
return map(int, sys.stdin.readline().split())
def SI():
return sys.stdin.readline().strip()
def gcd(x,y):
while(y):
x,y = y,x%y
... | 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
import sys
import math
def II():
return int(sys.stdin.readline())
def LI():
return list(map(int, sys.stdin.readline().split()))
def MI():
return map(int, sys.stdin.readline().split())
def SI():
return sys.stdin.readline().strip()
def gcd(x,y):
while(y):
x,y =... | 3.9455 |
264 | A | Escape from Stones | PROGRAMMING | 1,200 | [
"constructive algorithms",
"data structures",
"implementation",
"two pointers"
] | null | null | Squirrel Liss lived in a forest peacefully, but unexpected trouble happens. Stones fall from a mountain. Initially Squirrel Liss occupies an interval [0,<=1]. Next, *n* stones will fall and Liss will escape from the stones. The stones are numbered from 1 to *n* in order.
The stones always fall to the center of Liss's ... | The input consists of only one line. The only line contains the string *s* (1<=≤<=|*s*|<=≤<=106). Each character in *s* will be either "l" or "r". | Output *n* lines — on the *i*-th line you should print the *i*-th stone's number from the left. | [
"llrlr\n",
"rrlll\n",
"lrlrr\n"
] | [
"3\n5\n4\n2\n1\n",
"1\n2\n5\n4\n3\n",
"2\n4\n5\n3\n1\n"
] | In the first example, the positions of stones 1, 2, 3, 4, 5 will be <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/58fdb5684df807bfcb705a9da9ce175613362b7d.png" style="max-width: 100.0%;max-height: 100.0%;"/>, respectively. So you should print the sequence: 3, 5, 4, 2, 1. | 500 | [
{
"input": "llrlr",
"output": "3\n5\n4\n2\n1"
},
{
"input": "rrlll",
"output": "1\n2\n5\n4\n3"
},
{
"input": "lrlrr",
"output": "2\n4\n5\n3\n1"
},
{
"input": "lllrlrllrl",
"output": "4\n6\n9\n10\n8\n7\n5\n3\n2\n1"
},
{
"input": "llrlrrrlrr",
"output": "3\n5\n6... | 1,639,487,597 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 57 | 1,247 | 9,113,600 | def main() :
s= input()
for i in range(len(s)):
if s[i] == 'r' :
print(i+1)
for j in range(len(s)-1,-1,-1):
if s[j] == 'l' :
print(j+1)
main() | Title: Escape from Stones
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Squirrel Liss lived in a forest peacefully, but unexpected trouble happens. Stones fall from a mountain. Initially Squirrel Liss occupies an interval [0,<=1]. Next, *n* stones will fall and Liss will escape from the ... | ```python
def main() :
s= input()
for i in range(len(s)):
if s[i] == 'r' :
print(i+1)
for j in range(len(s)-1,-1,-1):
if s[j] == 'l' :
print(j+1)
main()
``` | 3 | |
714 | A | Meeting of Old Friends | PROGRAMMING | 1,100 | [
"implementation",
"math"
] | null | null | Today an outstanding event is going to happen in the forest — hedgehog Filya will come to his old fried Sonya!
Sonya is an owl and she sleeps during the day and stay awake from minute *l*1 to minute *r*1 inclusive. Also, during the minute *k* she prinks and is unavailable for Filya.
Filya works a lot and he plans to ... | The only line of the input contains integers *l*1, *r*1, *l*2, *r*2 and *k* (1<=≤<=*l*1,<=*r*1,<=*l*2,<=*r*2,<=*k*<=≤<=1018, *l*1<=≤<=*r*1, *l*2<=≤<=*r*2), providing the segments of time for Sonya and Filya and the moment of time when Sonya prinks. | Print one integer — the number of minutes Sonya and Filya will be able to spend together. | [
"1 10 9 20 1\n",
"1 100 50 200 75\n"
] | [
"2\n",
"50\n"
] | In the first sample, they will be together during minutes 9 and 10.
In the second sample, they will be together from minute 50 to minute 74 and from minute 76 to minute 100. | 500 | [
{
"input": "1 10 9 20 1",
"output": "2"
},
{
"input": "1 100 50 200 75",
"output": "50"
},
{
"input": "6 6 5 8 9",
"output": "1"
},
{
"input": "1 1000000000 1 1000000000 1",
"output": "999999999"
},
{
"input": "5 100 8 8 8",
"output": "0"
},
{
"input":... | 1,587,057,908 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 108 | 0 | l1, r1, l2, r2, k = map(int, input().split())
ans = r1-(l2-1)
if l2 <= k and r1 >= k: ans = ans -1
if ans < 0: ans = 0
print(ans) | Title: Meeting of Old Friends
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Today an outstanding event is going to happen in the forest — hedgehog Filya will come to his old fried Sonya!
Sonya is an owl and she sleeps during the day and stay awake from minute *l*1 to minute *r*1 inclusi... | ```python
l1, r1, l2, r2, k = map(int, input().split())
ans = r1-(l2-1)
if l2 <= k and r1 >= k: ans = ans -1
if ans < 0: ans = 0
print(ans)
``` | 0 | |
841 | A | Generous Kefa | PROGRAMMING | 900 | [
"brute force",
"implementation"
] | null | null | One day Kefa found *n* baloons. For convenience, we denote color of *i*-th baloon as *s**i* — lowercase letter of the Latin alphabet. Also Kefa has *k* friends. Friend will be upset, If he get two baloons of the same color. Kefa want to give out all baloons to his friends. Help Kefa to find out, can he give out all his... | The first line contains two integers *n* and *k* (1<=≤<=*n*,<=*k*<=≤<=100) — the number of baloons and friends.
Next line contains string *s* — colors of baloons. | Answer to the task — «YES» or «NO» in a single line.
You can choose the case (lower or upper) for each letter arbitrary. | [
"4 2\naabb\n",
"6 3\naacaab\n"
] | [
"YES\n",
"NO\n"
] | In the first sample Kefa can give 1-st and 3-rd baloon to the first friend, and 2-nd and 4-th to the second.
In the second sample Kefa needs to give to all his friends baloons of color a, but one baloon will stay, thats why answer is «NO». | 500 | [
{
"input": "4 2\naabb",
"output": "YES"
},
{
"input": "6 3\naacaab",
"output": "NO"
},
{
"input": "2 2\nlu",
"output": "YES"
},
{
"input": "5 3\novvoo",
"output": "YES"
},
{
"input": "36 13\nbzbzcffczzcbcbzzfzbbfzfzzbfbbcbfccbf",
"output": "YES"
},
{
"... | 1,587,938,254 | 2,147,483,647 | Python 3 | OK | TESTS | 114 | 109 | 0 | n,m=map(int,input().split())
a=list((input()))
b=list(set(a))
x=[a.count(b[i]) for i in range(len(b))]
if max(x)>m:
print("NO")
else:
print("YES") | Title: Generous Kefa
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day Kefa found *n* baloons. For convenience, we denote color of *i*-th baloon as *s**i* — lowercase letter of the Latin alphabet. Also Kefa has *k* friends. Friend will be upset, If he get two baloons of the same colo... | ```python
n,m=map(int,input().split())
a=list((input()))
b=list(set(a))
x=[a.count(b[i]) for i in range(len(b))]
if max(x)>m:
print("NO")
else:
print("YES")
``` | 3 | |
376 | B | I.O.U. | PROGRAMMING | 1,300 | [
"implementation"
] | null | null | Imagine that there is a group of three friends: A, B and С. A owes B 20 rubles and B owes C 20 rubles. The total sum of the debts is 40 rubles. You can see that the debts are not organized in a very optimal manner. Let's rearrange them like that: assume that A owes C 20 rubles and B doesn't owe anything to anybody. The... | The first line contains two integers *n* and *m* (1<=≤<=*n*<=≤<=100; 0<=≤<=*m*<=≤<=104). The next *m* lines contain the debts. The *i*-th line contains three integers *a**i*,<=*b**i*,<=*c**i* (1<=≤<=*a**i*,<=*b**i*<=≤<=*n*; *a**i*<=≠<=*b**i*; 1<=≤<=*c**i*<=≤<=100), which mean that person *a**i* owes person *b**i* *c**i... | Print a single integer — the minimum sum of debts in the optimal rearrangement. | [
"5 3\n1 2 10\n2 3 1\n2 4 1\n",
"3 0\n",
"4 3\n1 2 1\n2 3 1\n3 1 1\n"
] | [
"10\n",
"0\n",
"0\n"
] | In the first sample, you can assume that person number 1 owes 8 rubles to person number 2, 1 ruble to person number 3 and 1 ruble to person number 4. He doesn't owe anybody else anything. In the end, the total debt equals 10.
In the second sample, there are no debts.
In the third sample, you can annul all the debts. | 1,000 | [
{
"input": "5 3\n1 2 10\n2 3 1\n2 4 1",
"output": "10"
},
{
"input": "3 0",
"output": "0"
},
{
"input": "4 3\n1 2 1\n2 3 1\n3 1 1",
"output": "0"
},
{
"input": "20 28\n1 5 6\n1 12 7\n1 13 4\n1 15 7\n1 20 3\n2 4 1\n2 15 6\n3 5 3\n3 8 10\n3 13 8\n3 20 6\n4 6 10\n4 12 8\n4 19 5\... | 1,660,862,032 | 2,147,483,647 | Python 3 | OK | TESTS | 29 | 46 | 0 | n,m=[int(i) for i in input().split()] ; dic=dict() ; cou=0
for i in range(1,n+1):
dic[i]=0
for i in range(m):
a,b,c=list(map(int,input().split()))
dic[a]-=c ; dic[b]+=c
for i in dic.values():
if i>0:cou+=i
print(cou) | Title: I.O.U.
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Imagine that there is a group of three friends: A, B and С. A owes B 20 rubles and B owes C 20 rubles. The total sum of the debts is 40 rubles. You can see that the debts are not organized in a very optimal manner. Let's rearran... | ```python
n,m=[int(i) for i in input().split()] ; dic=dict() ; cou=0
for i in range(1,n+1):
dic[i]=0
for i in range(m):
a,b,c=list(map(int,input().split()))
dic[a]-=c ; dic[b]+=c
for i in dic.values():
if i>0:cou+=i
print(cou)
``` | 3 | |
842 | B | Gleb And Pizza | PROGRAMMING | 1,100 | [
"geometry"
] | null | null | Gleb ordered pizza home. When the courier delivered the pizza, he was very upset, because several pieces of sausage lay on the crust, and he does not really like the crust.
The pizza is a circle of radius *r* and center at the origin. Pizza consists of the main part — circle of radius *r*<=-<=*d* with center at the or... | First string contains two integer numbers *r* and *d* (0<=≤<=*d*<=<<=*r*<=≤<=500) — the radius of pizza and the width of crust.
Next line contains one integer number *n* — the number of pieces of sausage (1<=≤<=*n*<=≤<=105).
Each of next *n* lines contains three integer numbers *x**i*, *y**i* and *r**i* (<=-<=500<... | Output the number of pieces of sausage that lay on the crust. | [
"8 4\n7\n7 8 1\n-7 3 2\n0 2 1\n0 -2 2\n-3 -3 1\n0 6 2\n5 3 1\n",
"10 8\n4\n0 0 9\n0 0 10\n1 0 1\n1 0 2\n"
] | [
"2\n",
"0\n"
] | Below is a picture explaining the first example. Circles of green color denote pieces of sausage lying on the crust. | 1,000 | [
{
"input": "8 4\n7\n7 8 1\n-7 3 2\n0 2 1\n0 -2 2\n-3 -3 1\n0 6 2\n5 3 1",
"output": "2"
},
{
"input": "10 8\n4\n0 0 9\n0 0 10\n1 0 1\n1 0 2",
"output": "0"
},
{
"input": "1 0\n1\n1 1 0",
"output": "0"
},
{
"input": "3 0\n5\n3 0 0\n0 3 0\n-3 0 0\n0 -3 0\n3 0 1",
"output": ... | 1,590,431,687 | 2,147,483,647 | PyPy 3 | OK | TESTS | 34 | 935 | 11,776,000 | ip = input()
ipList = ip.split(" ")
rad = int(ipList[0])
d = int(ipList[1])
n = int(input())
x = []
y = []
r = []
for _ in range(n):
xi, yi, ri = list(map(int, input().split(" "))) #Or you can take the inputs like you do with 3 steps
x.append(xi)
y.append(yi)
r.append(ri)
p = rad - (0.5*d)
... | Title: Gleb And Pizza
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Gleb ordered pizza home. When the courier delivered the pizza, he was very upset, because several pieces of sausage lay on the crust, and he does not really like the crust.
The pizza is a circle of radius *r* and center... | ```python
ip = input()
ipList = ip.split(" ")
rad = int(ipList[0])
d = int(ipList[1])
n = int(input())
x = []
y = []
r = []
for _ in range(n):
xi, yi, ri = list(map(int, input().split(" "))) #Or you can take the inputs like you do with 3 steps
x.append(xi)
y.append(yi)
r.append(ri)
p = rad ... | 3 | |
6 | A | Triangle | PROGRAMMING | 900 | [
"brute force",
"geometry"
] | A. Triangle | 2 | 64 | Johnny has a younger sister Anne, who is very clever and smart. As she came home from the kindergarten, she told his brother about the task that her kindergartener asked her to solve. The task was just to construct a triangle out of four sticks of different colours. Naturally, one of the sticks is extra. It is not allo... | The first line of the input contains four space-separated positive integer numbers not exceeding 100 — lengthes of the sticks. | Output TRIANGLE if it is possible to construct a non-degenerate triangle. Output SEGMENT if the first case cannot take place and it is possible to construct a degenerate triangle. Output IMPOSSIBLE if it is impossible to construct any triangle. Remember that you are to use three sticks. It is not allowed to break the s... | [
"4 2 1 3\n",
"7 2 2 4\n",
"3 5 9 1\n"
] | [
"TRIANGLE\n",
"SEGMENT\n",
"IMPOSSIBLE\n"
] | none | 0 | [
{
"input": "4 2 1 3",
"output": "TRIANGLE"
},
{
"input": "7 2 2 4",
"output": "SEGMENT"
},
{
"input": "3 5 9 1",
"output": "IMPOSSIBLE"
},
{
"input": "3 1 5 1",
"output": "IMPOSSIBLE"
},
{
"input": "10 10 10 10",
"output": "TRIANGLE"
},
{
"input": "11 ... | 1,643,885,546 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 4 | 92 | 0 | a, b, c, d = [int(x) for x in input().split()]
if (a == b) or (b == c) or ((a + b) == c) :
print("SEGMENT")
elif (a == b == c) or ((a + b) > c) :
print("TRIANGLE")
else:
print("IMPOSSIBLE") | Title: Triangle
Time Limit: 2 seconds
Memory Limit: 64 megabytes
Problem Description:
Johnny has a younger sister Anne, who is very clever and smart. As she came home from the kindergarten, she told his brother about the task that her kindergartener asked her to solve. The task was just to construct a triangle out o... | ```python
a, b, c, d = [int(x) for x in input().split()]
if (a == b) or (b == c) or ((a + b) == c) :
print("SEGMENT")
elif (a == b == c) or ((a + b) > c) :
print("TRIANGLE")
else:
print("IMPOSSIBLE")
``` | 0 |
34 | B | Sale | PROGRAMMING | 900 | [
"greedy",
"sortings"
] | B. Sale | 2 | 256 | Once Bob got to a sale of old TV sets. There were *n* TV sets at that sale. TV set with index *i* costs *a**i* bellars. Some TV sets have a negative price — their owners are ready to pay Bob if he buys their useless apparatus. Bob can «buy» any TV sets he wants. Though he's very strong, Bob can carry at most *m* TV set... | The first line contains two space-separated integers *n* and *m* (1<=≤<=*m*<=≤<=*n*<=≤<=100) — amount of TV sets at the sale, and amount of TV sets that Bob can carry. The following line contains *n* space-separated integers *a**i* (<=-<=1000<=≤<=*a**i*<=≤<=1000) — prices of the TV sets. | Output the only number — the maximum sum of money that Bob can earn, given that he can carry at most *m* TV sets. | [
"5 3\n-6 0 35 -2 4\n",
"4 2\n7 0 0 -7\n"
] | [
"8\n",
"7\n"
] | none | 1,000 | [
{
"input": "5 3\n-6 0 35 -2 4",
"output": "8"
},
{
"input": "4 2\n7 0 0 -7",
"output": "7"
},
{
"input": "6 6\n756 -611 251 -66 572 -818",
"output": "1495"
},
{
"input": "5 5\n976 437 937 788 518",
"output": "0"
},
{
"input": "5 3\n-2 -2 -2 -2 -2",
"output": "... | 1,621,949,711 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 92 | 0 | n,k = map(int,input().split())
a = list(map(int,input().split()))
a.sort()
for i in range(n):
a[i]= -a[i]
for i in range(n):
if a[i]<0:
k = i
print(sum(a[0:k-1])) | Title: Sale
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Once Bob got to a sale of old TV sets. There were *n* TV sets at that sale. TV set with index *i* costs *a**i* bellars. Some TV sets have a negative price — their owners are ready to pay Bob if he buys their useless apparatus. Bob can... | ```python
n,k = map(int,input().split())
a = list(map(int,input().split()))
a.sort()
for i in range(n):
a[i]= -a[i]
for i in range(n):
if a[i]<0:
k = i
print(sum(a[0:k-1]))
``` | 0 |
835 | D | Palindromic characteristics | PROGRAMMING | 1,900 | [
"brute force",
"dp",
"hashing",
"strings"
] | null | null | Palindromic characteristics of string *s* with length |*s*| is a sequence of |*s*| integers, where *k*-th number is the total number of non-empty substrings of *s* which are *k*-palindromes.
A string is 1-palindrome if and only if it reads the same backward as forward.
A string is *k*-palindrome (*k*<=><=1) if and... | The first line contains the string *s* (1<=≤<=|*s*|<=≤<=5000) consisting of lowercase English letters. | Print |*s*| integers — palindromic characteristics of string *s*. | [
"abba\n",
"abacaba\n"
] | [
"6 1 0 0 \n",
"12 4 1 0 0 0 0 \n"
] | In the first example 1-palindromes are substring «a», «b», «b», «a», «bb», «abba», the substring «bb» is 2-palindrome. There are no 3- and 4-palindromes here. | 1,500 | [
{
"input": "abba",
"output": "6 1 0 0 "
},
{
"input": "abacaba",
"output": "12 4 1 0 0 0 0 "
},
{
"input": "qqqpvmgd",
"output": "11 3 0 0 0 0 0 0 "
},
{
"input": "wyemcafatp",
"output": "11 1 0 0 0 0 0 0 0 0 "
}
] | 1,678,097,154 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 15 | 0 | def count_good_substrings(s, good, k):
n = len(s)
count = 0
for i in range(n):
bad_count = 0
for j in range(i, n):
if good[ord(s[j])-ord('a')] == '0':
bad_count += 1
if bad_count > k:
break
count += 1
return c... | Title: Palindromic characteristics
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Palindromic characteristics of string *s* with length |*s*| is a sequence of |*s*| integers, where *k*-th number is the total number of non-empty substrings of *s* which are *k*-palindromes.
A string is 1-p... | ```python
def count_good_substrings(s, good, k):
n = len(s)
count = 0
for i in range(n):
bad_count = 0
for j in range(i, n):
if good[ord(s[j])-ord('a')] == '0':
bad_count += 1
if bad_count > k:
break
count += 1
... | -1 | |
84 | A | Toy Army | PROGRAMMING | 900 | [
"math",
"number theory"
] | A. Toy Army | 2 | 256 | The hero of our story, Valera, and his best friend Arcady are still in school, and therefore they spend all the free time playing turn-based strategy "GAGA: Go And Go Again". The gameplay is as follows.
There are two armies on the playing field each of which consists of *n* men (*n* is always even). The current playe... | The input data consist of a single integer *n* (2<=≤<=*n*<=≤<=108, *n* is even). Please note that before the game starts there are 2*n* soldiers on the fields. | Print a single number — a maximum total number of soldiers that could be killed in the course of the game in three turns. | [
"2\n",
"4\n"
] | [
"3\n",
"6\n"
] | The first sample test:
1) Valera's soldiers 1 and 2 shoot at Arcady's soldier 1.
2) Arcady's soldier 2 shoots at Valera's soldier 1.
3) Valera's soldier 1 shoots at Arcady's soldier 2.
There are 3 soldiers killed in total: Valera's soldier 1 and Arcady's soldiers 1 and 2. | 500 | [
{
"input": "2",
"output": "3"
},
{
"input": "4",
"output": "6"
},
{
"input": "6",
"output": "9"
},
{
"input": "8",
"output": "12"
},
{
"input": "10",
"output": "15"
},
{
"input": "140",
"output": "210"
},
{
"input": "500",
"output": "75... | 1,657,203,676 | 2,147,483,647 | Python 3 | OK | TESTS | 23 | 92 | 0 | val=arc=int(input())
summ=0
for i in range(3):
if i==0:
summ+=arc//2
arc//=2
elif i==1:
summ+=val//2
val//2
else:
summ+=arc
print(summ) | Title: Toy Army
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
The hero of our story, Valera, and his best friend Arcady are still in school, and therefore they spend all the free time playing turn-based strategy "GAGA: Go And Go Again". The gameplay is as follows.
There are two armies on t... | ```python
val=arc=int(input())
summ=0
for i in range(3):
if i==0:
summ+=arc//2
arc//=2
elif i==1:
summ+=val//2
val//2
else:
summ+=arc
print(summ)
``` | 3.977 |
821 | B | Okabe and Banana Trees | PROGRAMMING | 1,300 | [
"brute force",
"math"
] | null | null | Okabe needs bananas for one of his experiments for some strange reason. So he decides to go to the forest and cut banana trees.
Consider the point (*x*,<=*y*) in the 2D plane such that *x* and *y* are integers and 0<=≤<=*x*,<=*y*. There is a tree in such a point, and it has *x*<=+<=*y* bananas. There are no trees nor ... | The first line of input contains two space-separated integers *m* and *b* (1<=≤<=*m*<=≤<=1000, 1<=≤<=*b*<=≤<=10000). | Print the maximum number of bananas Okabe can get from the trees he cuts. | [
"1 5\n",
"2 3\n"
] | [
"30\n",
"25\n"
] | The graph above corresponds to sample test 1. The optimal rectangle is shown in red and has 30 bananas. | 1,000 | [
{
"input": "1 5",
"output": "30"
},
{
"input": "2 3",
"output": "25"
},
{
"input": "4 6",
"output": "459"
},
{
"input": "6 3",
"output": "171"
},
{
"input": "1 1",
"output": "1"
},
{
"input": "10 1",
"output": "55"
},
{
"input": "20 10",
... | 1,583,558,126 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 93 | 0 | def gelnana(m, b):
x_1 = int((b-1)*m)
sum_list = [0] * int(b + x_1 - 1)
for i in range(b+1):
x = int((b-i)*m)
print(x)
sum_list[i] = (i+1)*(x+1)*(i+x)/2
print(sum_list)
return int(max(sum_list))
array = list(map(int,input().split()))
m = array[0]
b = arra... | Title: Okabe and Banana Trees
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Okabe needs bananas for one of his experiments for some strange reason. So he decides to go to the forest and cut banana trees.
Consider the point (*x*,<=*y*) in the 2D plane such that *x* and *y* are integers a... | ```python
def gelnana(m, b):
x_1 = int((b-1)*m)
sum_list = [0] * int(b + x_1 - 1)
for i in range(b+1):
x = int((b-i)*m)
print(x)
sum_list[i] = (i+1)*(x+1)*(i+x)/2
print(sum_list)
return int(max(sum_list))
array = list(map(int,input().split()))
m = array[0]... | 0 | |
264 | B | Good Sequences | PROGRAMMING | 1,500 | [
"dp",
"number theory"
] | null | null | Squirrel Liss is interested in sequences. She also has preferences of integers. She thinks *n* integers *a*1,<=*a*2,<=...,<=*a**n* are good.
Now she is interested in good sequences. A sequence *x*1,<=*x*2,<=...,<=*x**k* is called good if it satisfies the following three conditions:
- The sequence is strictly increas... | The input consists of two lines. The first line contains a single integer *n* (1<=≤<=*n*<=≤<=105) — the number of good integers. The second line contains a single-space separated list of good integers *a*1,<=*a*2,<=...,<=*a**n* in strictly increasing order (1<=≤<=*a**i*<=≤<=105; *a**i*<=<<=*a**i*<=+<=1). | Print a single integer — the length of the longest good sequence. | [
"5\n2 3 4 6 9\n",
"9\n1 2 3 5 6 7 8 9 10\n"
] | [
"4\n",
"4\n"
] | In the first example, the following sequences are examples of good sequences: [2; 4; 6; 9], [2; 4; 6], [3; 9], [6]. The length of the longest good sequence is 4. | 1,000 | [
{
"input": "5\n2 3 4 6 9",
"output": "4"
},
{
"input": "9\n1 2 3 5 6 7 8 9 10",
"output": "4"
},
{
"input": "4\n1 2 4 6",
"output": "3"
},
{
"input": "7\n1 2 3 4 7 9 10",
"output": "3"
},
{
"input": "1\n1",
"output": "1"
},
{
"input": "8\n3 4 5 6 7 8 9... | 1,579,845,020 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 10 | 216 | 307,200 | from math import sqrt
def gcd(a, b):
if (a == 0):
return b
else:
return gcd(b % a, a)
def isPrime(a):
for i in range(2, int(sqrt(a)) + 1):
if (a % i == 0):
return False
return True
n = int(input())
xs = list(map(int, input().split(" ")))
# c... | Title: Good Sequences
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Squirrel Liss is interested in sequences. She also has preferences of integers. She thinks *n* integers *a*1,<=*a*2,<=...,<=*a**n* are good.
Now she is interested in good sequences. A sequence *x*1,<=*x*2,<=...,<=*x**k*... | ```python
from math import sqrt
def gcd(a, b):
if (a == 0):
return b
else:
return gcd(b % a, a)
def isPrime(a):
for i in range(2, int(sqrt(a)) + 1):
if (a % i == 0):
return False
return True
n = int(input())
xs = list(map(int, input().split(" "... | 0 | |
298 | B | Sail | PROGRAMMING | 1,200 | [
"brute force",
"greedy",
"implementation"
] | null | null | The polar bears are going fishing. They plan to sail from (*s**x*,<=*s**y*) to (*e**x*,<=*e**y*). However, the boat can only sail by wind. At each second, the wind blows in one of these directions: east, south, west or north. Assume the boat is currently at (*x*,<=*y*).
- If the wind blows to the east, the boat will ... | The first line contains five integers *t*,<=*s**x*,<=*s**y*,<=*e**x*,<=*e**y* (1<=≤<=*t*<=≤<=105,<=<=-<=109<=≤<=*s**x*,<=*s**y*,<=*e**x*,<=*e**y*<=≤<=109). The starting location and the ending location will be different.
The second line contains *t* characters, the *i*-th character is the wind blowing direction at the... | If they can reach (*e**x*,<=*e**y*) within *t* seconds, print the earliest time they can achieve it. Otherwise, print "-1" (without quotes). | [
"5 0 0 1 1\nSESNW\n",
"10 5 3 3 6\nNENSWESNEE\n"
] | [
"4\n",
"-1\n"
] | In the first sample, they can stay at seconds 1, 3, and move at seconds 2, 4.
In the second sample, they cannot sail to the destination. | 500 | [
{
"input": "5 0 0 1 1\nSESNW",
"output": "4"
},
{
"input": "10 5 3 3 6\nNENSWESNEE",
"output": "-1"
},
{
"input": "19 -172106364 -468680119 -172106365 -468680119\nSSEEESSSESESWSEESSS",
"output": "13"
},
{
"input": "39 -1000000000 -1000000000 -999999997 -1000000000\nENEENWSWSS... | 1,610,719,327 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 30 | 278 | 716,800 | from collections import *
t, sx, sy, ex, ey = map(int, input().split())
s = input()
cnte = 0
cntw = 0
cntn = 0
cnts = 0
if sx == ex and sy == ey:
print(0)
elif sx == ex:
if ey > sy:
diff = abs(ey - sy)
for i in range(t):
if s[i] == "N":
cntn += 1
... | Title: Sail
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The polar bears are going fishing. They plan to sail from (*s**x*,<=*s**y*) to (*e**x*,<=*e**y*). However, the boat can only sail by wind. At each second, the wind blows in one of these directions: east, south, west or north. Assu... | ```python
from collections import *
t, sx, sy, ex, ey = map(int, input().split())
s = input()
cnte = 0
cntw = 0
cntn = 0
cnts = 0
if sx == ex and sy == ey:
print(0)
elif sx == ex:
if ey > sy:
diff = abs(ey - sy)
for i in range(t):
if s[i] == "N":
cntn ... | 0 | |
78 | D | Archer's Shot | PROGRAMMING | 2,300 | [
"binary search",
"geometry",
"math",
"two pointers"
] | D. Archer's Shot | 2 | 256 | A breakthrough among computer games, "Civilization XIII", is striking in its scale and elaborate details. Let's take a closer look at one of them.
The playing area in the game is split into congruent cells that are regular hexagons. The side of each cell is equal to 1. Each unit occupies exactly one cell of the playin... | The first and only line of input contains a single positive integer *k* — the archer's shot range (1<=≤<=*k*<=≤<=106). | Print the single number, the number of cells that are under fire.
Please do not use the %lld specificator to read or write 64-bit integers in C++. It is preferred to use the cout stream (also you may use the %I64d specificator). | [
"3\n",
"4\n",
"5\n"
] | [
"7",
"13",
"19"
] | none | 2,000 | [
{
"input": "3",
"output": "7"
},
{
"input": "4",
"output": "13"
},
{
"input": "5",
"output": "19"
},
{
"input": "9",
"output": "85"
},
{
"input": "11",
"output": "121"
},
{
"input": "51",
"output": "3037"
},
{
"input": "101",
"output": ... | 1,625,122,747 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 3 | 93 | 0 | def calc(n):
ans = 1
n -= 1
while n:
ans += 6 * n
n -= 1
return ans
n = int(input())
ans = calc((n + 1) // 2)
if n % 2 == 0:
ans += 6
print(ans)
| Title: Archer's Shot
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
A breakthrough among computer games, "Civilization XIII", is striking in its scale and elaborate details. Let's take a closer look at one of them.
The playing area in the game is split into congruent cells that are regular h... | ```python
def calc(n):
ans = 1
n -= 1
while n:
ans += 6 * n
n -= 1
return ans
n = int(input())
ans = calc((n + 1) // 2)
if n % 2 == 0:
ans += 6
print(ans)
``` | 0 |
445 | A | DZY Loves Chessboard | PROGRAMMING | 1,200 | [
"dfs and similar",
"implementation"
] | null | null | DZY loves chessboard, and he enjoys playing with it.
He has a chessboard of *n* rows and *m* columns. Some cells of the chessboard are bad, others are good. For every good cell, DZY wants to put a chessman on it. Each chessman is either white or black. After putting all chessmen, DZY wants that no two chessmen with th... | The first line contains two space-separated integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=100).
Each of the next *n* lines contains a string of *m* characters: the *j*-th character of the *i*-th string is either "." or "-". A "." means that the corresponding cell (in the *i*-th row and the *j*-th column) is good, while a ... | Output must contain *n* lines, each line must contain a string of *m* characters. The *j*-th character of the *i*-th string should be either "W", "B" or "-". Character "W" means the chessman on the cell is white, "B" means it is black, "-" means the cell is a bad cell.
If multiple answers exist, print any of them. It ... | [
"1 1\n.\n",
"2 2\n..\n..\n",
"3 3\n.-.\n---\n--."
] | [
"B\n",
"BW\nWB\n",
"B-B\n---\n--B"
] | In the first sample, DZY puts a single black chessman. Of course putting a white one is also OK.
In the second sample, all 4 cells are good. No two same chessmen share an edge in the sample output.
In the third sample, no good cells are adjacent. So you can just put 3 chessmen, no matter what their colors are. | 500 | [
{
"input": "1 1\n.",
"output": "B"
},
{
"input": "2 2\n..\n..",
"output": "BW\nWB"
},
{
"input": "3 3\n.-.\n---\n--.",
"output": "B-B\n---\n--B"
},
{
"input": "3 1\n-\n.\n.",
"output": "-\nW\nB"
},
{
"input": "11 11\n-----------\n-----------\n-----------\n--------... | 1,628,588,566 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 4 | 62 | 6,963,200 | n,m=list(map(int,input().split()))
l=[]
for i in range(n):
t=input()
k=[]
for i in t:
k.append(i)
l.append(k)
for i in range(n):
for j in range(m):
if l[i][j]=='.':
if i==0:
if j==0:
l[i][j]='B'
else:
... | Title: DZY Loves Chessboard
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
DZY loves chessboard, and he enjoys playing with it.
He has a chessboard of *n* rows and *m* columns. Some cells of the chessboard are bad, others are good. For every good cell, DZY wants to put a chessman on it. ... | ```python
n,m=list(map(int,input().split()))
l=[]
for i in range(n):
t=input()
k=[]
for i in t:
k.append(i)
l.append(k)
for i in range(n):
for j in range(m):
if l[i][j]=='.':
if i==0:
if j==0:
l[i][j]='B'
e... | 0 | |
315 | A | Sereja and Bottles | PROGRAMMING | 1,400 | [
"brute force"
] | null | null | Sereja and his friends went to a picnic. The guys had *n* soda bottles just for it. Sereja forgot the bottle opener as usual, so the guys had to come up with another way to open bottles.
Sereja knows that the *i*-th bottle is from brand *a**i*, besides, you can use it to open other bottles of brand *b**i*. You can use... | The first line contains integer *n* (1<=≤<=*n*<=≤<=100) — the number of bottles. The next *n* lines contain the bottles' description. The *i*-th line contains two integers *a**i*,<=*b**i* (1<=≤<=*a**i*,<=*b**i*<=≤<=1000) — the description of the *i*-th bottle. | In a single line print a single integer — the answer to the problem. | [
"4\n1 1\n2 2\n3 3\n4 4\n",
"4\n1 2\n2 3\n3 4\n4 1\n"
] | [
"4\n",
"0\n"
] | none | 500 | [
{
"input": "4\n1 1\n2 2\n3 3\n4 4",
"output": "4"
},
{
"input": "4\n1 2\n2 3\n3 4\n4 1",
"output": "0"
},
{
"input": "3\n2 828\n4 392\n4 903",
"output": "3"
},
{
"input": "4\n2 3\n1 772\n3 870\n3 668",
"output": "2"
},
{
"input": "5\n1 4\n6 6\n4 3\n3 4\n4 758",
... | 1,645,515,326 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 2 | 62 | 0 |
def solve(s):
pass
t=int(input())
bot = [0 for _ in range(t)]
while t:
a,b = map(int, input().split())
if a!=b:
bot[b-1] = 1
#solve(s)
t-=1
print(bot.count(0)) | Title: Sereja and Bottles
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Sereja and his friends went to a picnic. The guys had *n* soda bottles just for it. Sereja forgot the bottle opener as usual, so the guys had to come up with another way to open bottles.
Sereja knows that the *i*-th... | ```python
def solve(s):
pass
t=int(input())
bot = [0 for _ in range(t)]
while t:
a,b = map(int, input().split())
if a!=b:
bot[b-1] = 1
#solve(s)
t-=1
print(bot.count(0))
``` | -1 | |
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... | 1,666,749,767 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 0 | 77 | 0 | from collections import deque
def binarySearchOnString(arr, x):
l = 0
r = len(arr) - 1
while (l <= r):
m = (l + r) // 2
if (arr[m] == x):
return m
elif (arr[m] < x):
l = m + 1
else:
r = m - 1
return -1 # If element is n... | 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
from collections import deque
def binarySearchOnString(arr, x):
l = 0
r = len(arr) - 1
while (l <= r):
m = (l + r) // 2
if (arr[m] == x):
return m
elif (arr[m] < x):
l = m + 1
else:
r = m - 1
return -1 # If el... | 0 | |
60 | A | Where Are My Flakes? | PROGRAMMING | 1,300 | [
"implementation",
"two pointers"
] | A. Where Are My Flakes? | 2 | 256 | One morning the Cereal Guy found out that all his cereal flakes were gone. He found a note instead of them. It turned out that his smart roommate hid the flakes in one of *n* boxes. The boxes stand in one row, they are numbered from 1 to *n* from the left to the right. The roommate left hints like "Hidden to the left o... | The first line contains two integers *n* and *m* (1<=≤<=*n*<=≤<=1000,<=0<=≤<=*m*<=≤<=1000) which represent the number of boxes and the number of hints correspondingly. Next *m* lines contain hints like "To the left of *i*" and "To the right of *i*", where *i* is integer (1<=≤<=*i*<=≤<=*n*). The hints may coincide. | The answer should contain exactly one integer — the number of boxes that should necessarily be checked or "-1" if the hints are contradictory. | [
"2 1\nTo the left of 2\n",
"3 2\nTo the right of 1\nTo the right of 2\n",
"3 1\nTo the left of 3\n",
"3 2\nTo the left of 2\nTo the right of 1\n"
] | [
"1\n",
"1\n",
"2\n",
"-1\n"
] | none | 500 | [
{
"input": "2 1\nTo the left of 2",
"output": "1"
},
{
"input": "3 2\nTo the right of 1\nTo the right of 2",
"output": "1"
},
{
"input": "3 1\nTo the left of 3",
"output": "2"
},
{
"input": "3 2\nTo the left of 2\nTo the right of 1",
"output": "-1"
},
{
"input": "... | 1,622,538,257 | 2,147,483,647 | Python 3 | OK | TESTS | 54 | 248 | 0 | n , m = map(int , input().split())
l , r = 1 , n
for _ in range(0 , m):
hint = input().split(" ")
if (hint[2][0]=='r'):
l = max(l , int(hint[4])+1)
else:
r = min(r , int(hint[4])-1)
#print(l , r)
if r>=l:
print(r-l+1)
else:
print(-1) | Title: Where Are My Flakes?
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
One morning the Cereal Guy found out that all his cereal flakes were gone. He found a note instead of them. It turned out that his smart roommate hid the flakes in one of *n* boxes. The boxes stand in one row, they are... | ```python
n , m = map(int , input().split())
l , r = 1 , n
for _ in range(0 , m):
hint = input().split(" ")
if (hint[2][0]=='r'):
l = max(l , int(hint[4])+1)
else:
r = min(r , int(hint[4])-1)
#print(l , r)
if r>=l:
print(r-l+1)
else:
print(-1)
``` | 3.938 |
492 | A | Vanya and Cubes | PROGRAMMING | 800 | [
"implementation"
] | null | null | Vanya got *n* cubes. He decided to build a pyramid from them. Vanya wants to build the pyramid as follows: the top level of the pyramid must consist of 1 cube, the second level must consist of 1<=+<=2<==<=3 cubes, the third level must have 1<=+<=2<=+<=3<==<=6 cubes, and so on. Thus, the *i*-th level of the pyramid must... | The first line contains integer *n* (1<=≤<=*n*<=≤<=104) — the number of cubes given to Vanya. | Print the maximum possible height of the pyramid in the single line. | [
"1\n",
"25\n"
] | [
"1\n",
"4\n"
] | Illustration to the second sample: | 500 | [
{
"input": "1",
"output": "1"
},
{
"input": "25",
"output": "4"
},
{
"input": "2",
"output": "1"
},
{
"input": "4115",
"output": "28"
},
{
"input": "9894",
"output": "38"
},
{
"input": "7969",
"output": "35"
},
{
"input": "6560",
"outpu... | 1,693,233,279 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 15 | 0 | a=int(input())
k=0
while k*(k+1)*(k+2)<=6*a:
k+=1
print(k) | Title: Vanya and Cubes
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vanya got *n* cubes. He decided to build a pyramid from them. Vanya wants to build the pyramid as follows: the top level of the pyramid must consist of 1 cube, the second level must consist of 1<=+<=2<==<=3 cubes, the t... | ```python
a=int(input())
k=0
while k*(k+1)*(k+2)<=6*a:
k+=1
print(k)
``` | 0 | |
11 | A | Increasing Sequence | PROGRAMMING | 900 | [
"constructive algorithms",
"implementation",
"math"
] | A. Increasing Sequence | 1 | 64 | A sequence *a*0,<=*a*1,<=...,<=*a**t*<=-<=1 is called increasing if *a**i*<=-<=1<=<<=*a**i* for each *i*:<=0<=<<=*i*<=<<=*t*.
You are given a sequence *b*0,<=*b*1,<=...,<=*b**n*<=-<=1 and a positive integer *d*. In each move you may choose one element of the given sequence and add *d* to it. What is the least... | The first line of the input contains two integer numbers *n* and *d* (2<=≤<=*n*<=≤<=2000,<=1<=≤<=*d*<=≤<=106). The second line contains space separated sequence *b*0,<=*b*1,<=...,<=*b**n*<=-<=1 (1<=≤<=*b**i*<=≤<=106). | Output the minimal number of moves needed to make the sequence increasing. | [
"4 2\n1 3 3 2\n"
] | [
"3\n"
] | none | 0 | [
{
"input": "4 2\n1 3 3 2",
"output": "3"
},
{
"input": "2 1\n1 1",
"output": "1"
},
{
"input": "2 1\n2 5",
"output": "0"
},
{
"input": "2 1\n1 2",
"output": "0"
},
{
"input": "2 1\n1 1",
"output": "1"
},
{
"input": "2 7\n10 20",
"output": "0"
},
... | 1,659,336,415 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | """
A sequence a0, a1, ..., at - 1 is called increasing if ai - 1 < ai for each i: 0 < i < t.
You are given a sequence b0, b1, ..., bn - 1 and a positive integer d. In each move you may choose one element of the given sequence and add d to it. What is the least number of moves required to make the given sequence incre... | Title: Increasing Sequence
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
A sequence *a*0,<=*a*1,<=...,<=*a**t*<=-<=1 is called increasing if *a**i*<=-<=1<=<<=*a**i* for each *i*:<=0<=<<=*i*<=<<=*t*.
You are given a sequence *b*0,<=*b*1,<=...,<=*b**n*<=-<=1 and a positive integer *d*... | ```python
"""
A sequence a0, a1, ..., at - 1 is called increasing if ai - 1 < ai for each i: 0 < i < t.
You are given a sequence b0, b1, ..., bn - 1 and a positive integer d. In each move you may choose one element of the given sequence and add d to it. What is the least number of moves required to make the given sequ... | -1 |
527 | A | Playing with Paper | PROGRAMMING | 1,100 | [
"implementation",
"math"
] | null | null | One day Vasya was sitting on a not so interesting Maths lesson and making an origami from a rectangular *a* mm <=×<= *b* mm sheet of paper (*a*<=><=*b*). Usually the first step in making an origami is making a square piece of paper from the rectangular sheet by folding the sheet along the bisector of the right angle... | The first line of the input contains two integers *a*, *b* (1<=≤<=*b*<=<<=*a*<=≤<=1012) — the sizes of the original sheet of paper. | Print a single integer — the number of ships that Vasya will make. | [
"2 1\n",
"10 7\n",
"1000000000000 1\n"
] | [
"2\n",
"6\n",
"1000000000000\n"
] | Pictures to the first and second sample test. | 500 | [
{
"input": "2 1",
"output": "2"
},
{
"input": "10 7",
"output": "6"
},
{
"input": "1000000000000 1",
"output": "1000000000000"
},
{
"input": "3 1",
"output": "3"
},
{
"input": "4 1",
"output": "4"
},
{
"input": "3 2",
"output": "3"
},
{
"in... | 1,426,930,134 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | def paper(a, b):
count = 1
area = a * b
while a != b:
if a > b:
area -= a * a
a -= b
elif a < b:
area -= b*b
b -= a
count += 1
return count
print(paper(2, 1))
print(paper(10, 7))
| Title: Playing with Paper
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day Vasya was sitting on a not so interesting Maths lesson and making an origami from a rectangular *a* mm <=×<= *b* mm sheet of paper (*a*<=><=*b*). Usually the first step in making an origami is making a squ... | ```python
def paper(a, b):
count = 1
area = a * b
while a != b:
if a > b:
area -= a * a
a -= b
elif a < b:
area -= b*b
b -= a
count += 1
return count
print(paper(2, 1))
print(paper(10, 7))
``` | 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?",
... | 1,646,835,049 | 2,147,483,647 | Python 3 | OK | TESTS | 35 | 92 | 0 | print('NYOE S'[input()[:-1].strip()[-1] in 'aeiouyAEIOUY'::2]) | 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
print('NYOE S'[input()[:-1].strip()[-1] in 'aeiouyAEIOUY'::2])
``` | 3.977 |
492 | A | Vanya and Cubes | PROGRAMMING | 800 | [
"implementation"
] | null | null | Vanya got *n* cubes. He decided to build a pyramid from them. Vanya wants to build the pyramid as follows: the top level of the pyramid must consist of 1 cube, the second level must consist of 1<=+<=2<==<=3 cubes, the third level must have 1<=+<=2<=+<=3<==<=6 cubes, and so on. Thus, the *i*-th level of the pyramid must... | The first line contains integer *n* (1<=≤<=*n*<=≤<=104) — the number of cubes given to Vanya. | Print the maximum possible height of the pyramid in the single line. | [
"1\n",
"25\n"
] | [
"1\n",
"4\n"
] | Illustration to the second sample: | 500 | [
{
"input": "1",
"output": "1"
},
{
"input": "25",
"output": "4"
},
{
"input": "2",
"output": "1"
},
{
"input": "4115",
"output": "28"
},
{
"input": "9894",
"output": "38"
},
{
"input": "7969",
"output": "35"
},
{
"input": "6560",
"outpu... | 1,690,280,835 | 2,147,483,647 | Python 3 | OK | TESTS | 25 | 46 | 0 | x=int(input())
i=1
sum=0
while(sum<=x):
c=(i*(i+1))//2
sum+=c
if(sum==x):
print(i)
exit()
elif(sum>x):
print(i-1)
exit()
i+=1
| Title: Vanya and Cubes
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vanya got *n* cubes. He decided to build a pyramid from them. Vanya wants to build the pyramid as follows: the top level of the pyramid must consist of 1 cube, the second level must consist of 1<=+<=2<==<=3 cubes, the t... | ```python
x=int(input())
i=1
sum=0
while(sum<=x):
c=(i*(i+1))//2
sum+=c
if(sum==x):
print(i)
exit()
elif(sum>x):
print(i-1)
exit()
i+=1
``` | 3 | |
802 | G | Fake News (easy) | PROGRAMMING | 800 | [
"implementation",
"strings"
] | null | null | As it's the first of April, Heidi is suspecting that the news she reads today are fake, and she does not want to look silly in front of all the contestants. She knows that a newspiece is fake if it contains heidi as a subsequence. Help Heidi assess whether the given piece is true, but please be discreet about it... | The first and only line of input contains a single nonempty string *s* of length at most 1000 composed of lowercase letters (a-z). | Output YES if the string *s* contains heidi as a subsequence and NO otherwise. | [
"abcheaibcdi\n",
"hiedi\n"
] | [
"YES",
"NO"
] | A string *s* contains another string *p* as a subsequence if it is possible to delete some characters from *s* and obtain *p*. | 0 | [
{
"input": "abcheaibcdi",
"output": "YES"
},
{
"input": "hiedi",
"output": "NO"
},
{
"input": "ihied",
"output": "NO"
},
{
"input": "diehi",
"output": "NO"
},
{
"input": "deiih",
"output": "NO"
},
{
"input": "iheid",
"output": "NO"
},
{
"in... | 1,619,467,079 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 46 | 0 | word = input()
substring = 'heidi'
if substring in word:
print('YES')
else:
print('NO')
| Title: Fake News (easy)
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
As it's the first of April, Heidi is suspecting that the news she reads today are fake, and she does not want to look silly in front of all the contestants. She knows that a newspiece is fake if it contains heidi as a ... | ```python
word = input()
substring = 'heidi'
if substring in word:
print('YES')
else:
print('NO')
``` | 0 | |
614 | A | Link/Cut Tree | PROGRAMMING | 1,500 | [
"brute force",
"implementation"
] | null | null | Programmer Rostislav got seriously interested in the Link/Cut Tree data structure, which is based on Splay trees. Specifically, he is now studying the *expose* procedure.
Unfortunately, Rostislav is unable to understand the definition of this procedure, so he decided to ask programmer Serezha to help him. Serezha agre... | The first line of the input contains three space-separated integers *l*, *r* and *k* (1<=≤<=*l*<=≤<=*r*<=≤<=1018, 2<=≤<=*k*<=≤<=109). | Print all powers of number *k*, that lie within range from *l* to *r* in the increasing order. If there are no such numbers, print "-1" (without the quotes). | [
"1 10 2\n",
"2 4 5\n"
] | [
"1 2 4 8 ",
"-1"
] | Note to the first sample: numbers 2<sup class="upper-index">0</sup> = 1, 2<sup class="upper-index">1</sup> = 2, 2<sup class="upper-index">2</sup> = 4, 2<sup class="upper-index">3</sup> = 8 lie within the specified range. The number 2<sup class="upper-index">4</sup> = 16 is greater then 10, thus it shouldn't be printed. | 500 | [
{
"input": "1 10 2",
"output": "1 2 4 8 "
},
{
"input": "2 4 5",
"output": "-1"
},
{
"input": "18102 43332383920 28554",
"output": "28554 815330916 "
},
{
"input": "19562 31702689720 17701",
"output": "313325401 "
},
{
"input": "11729 55221128400 313",
"output... | 1,623,508,172 | 2,147,483,647 | PyPy 3 | OK | TESTS | 44 | 108 | 0 | import math
l,r,k = [int(item) for item in input().split()]
a=0
for i in range(100):
p = k ** i
if(p>= l and p<=r):
print(p)
a+=1
elif(p>r):
break
if(a==0):
print(-1)
| Title: Link/Cut Tree
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Programmer Rostislav got seriously interested in the Link/Cut Tree data structure, which is based on Splay trees. Specifically, he is now studying the *expose* procedure.
Unfortunately, Rostislav is unable to understand ... | ```python
import math
l,r,k = [int(item) for item in input().split()]
a=0
for i in range(100):
p = k ** i
if(p>= l and p<=r):
print(p)
a+=1
elif(p>r):
break
if(a==0):
print(-1)
``` | 3 | |
950 | A | Left-handers, Right-handers and Ambidexters | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | You are at a water bowling training. There are *l* people who play with their left hand, *r* people, who play with their right hand, and *a* ambidexters, who can play with left or right hand.
The coach decided to form a team of even number of players, exactly half of the players should play with their right hand, and ... | The only line contains three integers *l*, *r* and *a* (0<=≤<=*l*,<=*r*,<=*a*<=≤<=100) — the number of left-handers, the number of right-handers and the number of ambidexters at the training. | Print a single even integer — the maximum number of players in the team. It is possible that the team can only have zero number of players. | [
"1 4 2\n",
"5 5 5\n",
"0 2 0\n"
] | [
"6\n",
"14\n",
"0\n"
] | In the first example you can form a team of 6 players. You should take the only left-hander and two ambidexters to play with left hand, and three right-handers to play with right hand. The only person left can't be taken into the team.
In the second example you can form a team of 14 people. You have to take all five l... | 500 | [
{
"input": "1 4 2",
"output": "6"
},
{
"input": "5 5 5",
"output": "14"
},
{
"input": "0 2 0",
"output": "0"
},
{
"input": "30 70 34",
"output": "128"
},
{
"input": "89 32 24",
"output": "112"
},
{
"input": "89 44 77",
"output": "210"
},
{
... | 1,566,216,412 | 2,147,483,647 | Python 3 | OK | TESTS | 79 | 155 | 0 | arr=list(map(int,(input().split())))
d= abs(arr[0]-arr[1])
if d>arr[2]:
c=min(arr[0],arr[1])+arr[2]
else:
c=sum(arr)//2
print(c*2) | Title: Left-handers, Right-handers and Ambidexters
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are at a water bowling training. There are *l* people who play with their left hand, *r* people, who play with their right hand, and *a* ambidexters, who can play with left or right hand.... | ```python
arr=list(map(int,(input().split())))
d= abs(arr[0]-arr[1])
if d>arr[2]:
c=min(arr[0],arr[1])+arr[2]
else:
c=sum(arr)//2
print(c*2)
``` | 3 | |
363 | B | Fence | PROGRAMMING | 1,100 | [
"brute force",
"dp"
] | null | null | There is a fence in front of Polycarpus's home. The fence consists of *n* planks of the same width which go one after another from left to right. The height of the *i*-th plank is *h**i* meters, distinct planks can have distinct heights.
Polycarpus has bought a posh piano and is thinking about how to get it into the h... | The first line of the input contains integers *n* and *k* (1<=≤<=*n*<=≤<=1.5·105,<=1<=≤<=*k*<=≤<=*n*) — the number of planks in the fence and the width of the hole for the piano. The second line contains the sequence of integers *h*1,<=*h*2,<=...,<=*h**n* (1<=≤<=*h**i*<=≤<=100), where *h**i* is the height of the *i*-th... | Print such integer *j* that the sum of the heights of planks *j*, *j*<=+<=1, ..., *j*<=+<=*k*<=-<=1 is the minimum possible. If there are multiple such *j*'s, print any of them. | [
"7 3\n1 2 6 1 1 7 1\n"
] | [
"3\n"
] | In the sample, your task is to find three consecutive planks with the minimum sum of heights. In the given case three planks with indexes 3, 4 and 5 have the required attribute, their total height is 8. | 1,000 | [
{
"input": "7 3\n1 2 6 1 1 7 1",
"output": "3"
},
{
"input": "1 1\n100",
"output": "1"
},
{
"input": "2 1\n10 20",
"output": "1"
},
{
"input": "10 5\n1 2 3 1 2 2 3 1 4 5",
"output": "1"
},
{
"input": "10 2\n3 1 4 1 4 6 2 1 4 6",
"output": "7"
},
{
"inp... | 1,689,557,823 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 1 | 30 | 0 | n, k = [int(x) for x in input().split(" ")]
h = [int(x) for x in input().split(" ")]
m = 400
j = 0
for i in range(n-2):
s = sum(h[i:i+3])
if s < m:
m = s
j = i+1
print(j)
| Title: Fence
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There is a fence in front of Polycarpus's home. The fence consists of *n* planks of the same width which go one after another from left to right. The height of the *i*-th plank is *h**i* meters, distinct planks can have distinct ... | ```python
n, k = [int(x) for x in input().split(" ")]
h = [int(x) for x in input().split(" ")]
m = 400
j = 0
for i in range(n-2):
s = sum(h[i:i+3])
if s < m:
m = s
j = i+1
print(j)
``` | 0 | |
325 | B | Stadium and Games | PROGRAMMING | 1,800 | [
"binary search",
"math"
] | null | null | Daniel is organizing a football tournament. He has come up with the following tournament format:
1. In the first several (possibly zero) stages, while the number of teams is even, they split in pairs and play one game for each pair. At each stage the loser of each pair is eliminated (there are no draws). Such stages... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=1018), the number of games that should be played.
Please, do not use the %lld specifier to read or write 64-bit integers in С++. It is preferred to use the cin, cout streams or the %I64d specifier. | Print all possible numbers of invited teams in ascending order, one per line. If exactly *n* games cannot be played, output one number: -1. | [
"3\n",
"25\n",
"2\n"
] | [
"3\n4\n",
"20\n",
"-1\n"
] | none | 1,000 | [
{
"input": "3",
"output": "3\n4"
},
{
"input": "25",
"output": "20"
},
{
"input": "2",
"output": "-1"
},
{
"input": "1",
"output": "2"
},
{
"input": "15",
"output": "10\n16"
},
{
"input": "314",
"output": "-1"
},
{
"input": "524800",
"o... | 1,586,673,690 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 8 | 374 | 2,355,200 | def get_val(x,m):
val=(x*(x-1))/2
for i in range(m):
val+=x*(2**i)
return val
n=int(input())
#print(n)
#print(x)
ans=[]
for i in range(61):
l=1
r=2**70
while l<r:
mid=(l+r)//2
if get_val(mid,i)<n:
l=mid+1
else:
r=mi... | Title: Stadium and Games
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Daniel is organizing a football tournament. He has come up with the following tournament format:
1. In the first several (possibly zero) stages, while the number of teams is even, they split in pairs and play one g... | ```python
def get_val(x,m):
val=(x*(x-1))/2
for i in range(m):
val+=x*(2**i)
return val
n=int(input())
#print(n)
#print(x)
ans=[]
for i in range(61):
l=1
r=2**70
while l<r:
mid=(l+r)//2
if get_val(mid,i)<n:
l=mid+1
else:
... | 0 | |
982 | C | Cut 'em all! | PROGRAMMING | 1,500 | [
"dfs and similar",
"dp",
"graphs",
"greedy",
"trees"
] | null | null | You're given a tree with $n$ vertices.
Your task is to determine the maximum possible number of edges that can be removed in such a way that all the remaining connected components will have even size. | The first line contains an integer $n$ ($1 \le n \le 10^5$) denoting the size of the tree.
The next $n - 1$ lines contain two integers $u$, $v$ ($1 \le u, v \le n$) each, describing the vertices connected by the $i$-th edge.
It's guaranteed that the given edges form a tree. | Output a single integer $k$ — the maximum number of edges that can be removed to leave all connected components with even size, or $-1$ if it is impossible to remove edges in order to satisfy this property. | [
"4\n2 4\n4 1\n3 1\n",
"3\n1 2\n1 3\n",
"10\n7 1\n8 4\n8 10\n4 7\n6 5\n9 3\n3 5\n2 10\n2 5\n",
"2\n1 2\n"
] | [
"1",
"-1",
"4",
"0"
] | In the first example you can remove the edge between vertices $1$ and $4$. The graph after that will have two connected components with two vertices in each.
In the second example you can't remove edges in such a way that all components have even number of vertices, so the answer is $-1$. | 1,500 | [
{
"input": "4\n2 4\n4 1\n3 1",
"output": "1"
},
{
"input": "3\n1 2\n1 3",
"output": "-1"
},
{
"input": "10\n7 1\n8 4\n8 10\n4 7\n6 5\n9 3\n3 5\n2 10\n2 5",
"output": "4"
},
{
"input": "2\n1 2",
"output": "0"
},
{
"input": "1",
"output": "-1"
},
{
"inpu... | 1,626,871,339 | 2,147,483,647 | PyPy 3 | OK | TESTS | 45 | 998 | 39,219,200 | # link: https://codeforces.com/problemset/problem/982/C
from collections import defaultdict
for _ in range(1):
n = int(input())
tree = defaultdict(list)
for i in range(n-1):
u, v = map(int, input().split())
tree[u].append(v)
tree[v].append(u)
if len(tree) % 2 or ... | Title: Cut 'em all!
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You're given a tree with $n$ vertices.
Your task is to determine the maximum possible number of edges that can be removed in such a way that all the remaining connected components will have even size.
Input Specification... | ```python
# link: https://codeforces.com/problemset/problem/982/C
from collections import defaultdict
for _ in range(1):
n = int(input())
tree = defaultdict(list)
for i in range(n-1):
u, v = map(int, input().split())
tree[u].append(v)
tree[v].append(u)
if len(tre... | 3 | |
486 | A | Calculating Function | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | For a positive integer *n* let's define a function *f*:
*f*(*n*)<==<=<=-<=1<=+<=2<=-<=3<=+<=..<=+<=(<=-<=1)*n**n*
Your task is to calculate *f*(*n*) for a given integer *n*. | The single line contains the positive integer *n* (1<=≤<=*n*<=≤<=1015). | Print *f*(*n*) in a single line. | [
"4\n",
"5\n"
] | [
"2\n",
"-3\n"
] | *f*(4) = - 1 + 2 - 3 + 4 = 2
*f*(5) = - 1 + 2 - 3 + 4 - 5 = - 3 | 500 | [
{
"input": "4",
"output": "2"
},
{
"input": "5",
"output": "-3"
},
{
"input": "1000000000",
"output": "500000000"
},
{
"input": "1000000001",
"output": "-500000001"
},
{
"input": "1000000000000000",
"output": "500000000000000"
},
{
"input": "100",
... | 1,694,081,026 | 2,147,483,647 | Python 3 | OK | TESTS | 39 | 46 | 0 | n = int(input())
if n%2 == 0:
r = n//2
else :
r = -(n+1)//2
print(r)
| Title: Calculating Function
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
For a positive integer *n* let's define a function *f*:
*f*(*n*)<==<=<=-<=1<=+<=2<=-<=3<=+<=..<=+<=(<=-<=1)*n**n*
Your task is to calculate *f*(*n*) for a given integer *n*.
Input Specification:
The single line... | ```python
n = int(input())
if n%2 == 0:
r = n//2
else :
r = -(n+1)//2
print(r)
``` | 3 | |
914 | G | Sum the Fibonacci | PROGRAMMING | 2,600 | [
"bitmasks",
"divide and conquer",
"dp",
"fft",
"math"
] | null | null | You are given an array *s* of *n* non-negative integers.
A 5-tuple of integers (*a*,<=*b*,<=*c*,<=*d*,<=*e*) is said to be valid if it satisfies the following conditions:
- 1<=≤<=*a*,<=*b*,<=*c*,<=*d*,<=*e*<=≤<=*n* - (*s**a* | *s**b*) & *s**c* & (*s**d* ^ *s**e*)<==<=2*i* for some integer *i* - *s**a* &am... | The first line of input contains an integer *n* (1<=≤<=*n*<=≤<=106).
The second line of input contains *n* integers *s**i* (0<=≤<=*s**i*<=<<=217). | Output the sum as described above, modulo 109<=+<=7 | [
"2\n1 2\n",
"3\n7 4 1\n",
"10\n1 3 0 7 3 7 6 5 7 5\n",
"10\n50 9 11 44 39 40 5 39 23 7\n"
] | [
"32\n",
"3520\n",
"1235424\n",
"113860062\n"
] | none | 3,500 | [
{
"input": "2\n1 2",
"output": "32"
},
{
"input": "3\n7 4 1",
"output": "3520"
},
{
"input": "10\n1 3 0 7 3 7 6 5 7 5",
"output": "1235424"
},
{
"input": "10\n50 9 11 44 39 40 5 39 23 7",
"output": "113860062"
},
{
"input": "10\n4 4 3 1 5 1 3 6 4 4",
"output":... | 1,633,542,469 | 2,147,483,647 | PyPy 3 | OK | TESTS | 170 | 3,291 | 110,080,000 | import sys
readline=sys.stdin.readline
def Hadamard(lst,n,mod=0,inverse=False):
lst_=[x for x in lst]+[0]*((1<<n)-len(lst))
for bit in range(n):
for i in range(1<<n):
ii=i^(1<<bit)
if i>ii:
continue
lst_[i],lst_[ii]=lst_[i]+lst_[ii],lst_[i]-... | Title: Sum the Fibonacci
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given an array *s* of *n* non-negative integers.
A 5-tuple of integers (*a*,<=*b*,<=*c*,<=*d*,<=*e*) is said to be valid if it satisfies the following conditions:
- 1<=≤<=*a*,<=*b*,<=*c*,<=*d*,<=*e*<=≤<=*n... | ```python
import sys
readline=sys.stdin.readline
def Hadamard(lst,n,mod=0,inverse=False):
lst_=[x for x in lst]+[0]*((1<<n)-len(lst))
for bit in range(n):
for i in range(1<<n):
ii=i^(1<<bit)
if i>ii:
continue
lst_[i],lst_[ii]=lst_[i]+lst_[ii... | 3 | |
49 | B | Sum | PROGRAMMING | 1,500 | [
"math"
] | B. Sum | 2 | 256 | Vasya studies positional numeral systems. Unfortunately, he often forgets to write the base of notation in which the expression is written. Once he saw a note in his notebook saying *a*<=+<=*b*<==<=?, and that the base of the positional notation wasn’t written anywhere. Now Vasya has to choose a base *p* and regard the... | The first letter contains two space-separated numbers *a* and *b* (1<=≤<=*a*,<=*b*<=≤<=1000) which represent the given summands. | Print a single number — the length of the longest answer. | [
"78 87\n",
"1 1\n"
] | [
"3\n",
"2\n"
] | none | 1,000 | [
{
"input": "78 87",
"output": "3"
},
{
"input": "1 1",
"output": "2"
},
{
"input": "9 7",
"output": "2"
},
{
"input": "11 11",
"output": "3"
},
{
"input": "43 21",
"output": "3"
},
{
"input": "84 89",
"output": "3"
},
{
"input": "12 34",
... | 1,679,324,880 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 92 | 0 | info = input().split()
a = info[0]
b = info[1]
c = max(list(map(int,list(a+b))))+1
print(len(str(int(a,c)+int(b,c))))
| Title: Sum
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya studies positional numeral systems. Unfortunately, he often forgets to write the base of notation in which the expression is written. Once he saw a note in his notebook saying *a*<=+<=*b*<==<=?, and that the base of the positiona... | ```python
info = input().split()
a = info[0]
b = info[1]
c = max(list(map(int,list(a+b))))+1
print(len(str(int(a,c)+int(b,c))))
``` | 0 |
998 | B | Cutting | PROGRAMMING | 1,200 | [
"dp",
"greedy",
"sortings"
] | null | null | There are a lot of things which could be cut — trees, paper, "the rope". In this problem you are going to cut a sequence of integers.
There is a sequence of integers, which contains the equal number of even and odd numbers. Given a limited budget, you need to make maximum possible number of cuts such that each resulti... | First line of the input contains an integer $n$ ($2 \le n \le 100$) and an integer $B$ ($1 \le B \le 100$) — the number of elements in the sequence and the number of bitcoins you have.
Second line contains $n$ integers: $a_1$, $a_2$, ..., $a_n$ ($1 \le a_i \le 100$) — elements of the sequence, which contains the equal... | Print the maximum possible number of cuts which can be made while spending no more than $B$ bitcoins. | [
"6 4\n1 2 5 10 15 20\n",
"4 10\n1 3 2 4\n",
"6 100\n1 2 3 4 5 6\n"
] | [
"1\n",
"0\n",
"2\n"
] | In the first sample the optimal answer is to split sequence between $2$ and $5$. Price of this cut is equal to $3$ bitcoins.
In the second sample it is not possible to make even one cut even with unlimited number of bitcoins.
In the third sample the sequence should be cut between $2$ and $3$, and between $4$ and $5$.... | 1,000 | [
{
"input": "6 4\n1 2 5 10 15 20",
"output": "1"
},
{
"input": "4 10\n1 3 2 4",
"output": "0"
},
{
"input": "6 100\n1 2 3 4 5 6",
"output": "2"
},
{
"input": "2 100\n13 78",
"output": "0"
},
{
"input": "10 1\n56 56 98 2 11 64 97 41 95 53",
"output": "0"
},
... | 1,690,278,057 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 3 | 46 | 0 | n, bitcoin = list(map(int, input().split()))
arr = list(map(int, input().split()))
if n == 2:
if (arr[0] % 2 == 0 and arr[1] % 2 == 1 or arr[1] % 2 == 0 and arr[0] % 2 == 1) and abs(arr[0] - arr[1]) <= bitcoin:
print(1)
else:
print(0)
else:
summ = 0
cuts = 0
a = 0; b ... | Title: Cutting
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There are a lot of things which could be cut — trees, paper, "the rope". In this problem you are going to cut a sequence of integers.
There is a sequence of integers, which contains the equal number of even and odd numbers. Gi... | ```python
n, bitcoin = list(map(int, input().split()))
arr = list(map(int, input().split()))
if n == 2:
if (arr[0] % 2 == 0 and arr[1] % 2 == 1 or arr[1] % 2 == 0 and arr[0] % 2 == 1) and abs(arr[0] - arr[1]) <= bitcoin:
print(1)
else:
print(0)
else:
summ = 0
cuts = 0
... | 0 | |
336 | A | Vasily the Bear and Triangle | PROGRAMMING | 1,000 | [
"implementation",
"math"
] | null | null | Vasily the bear has a favorite rectangle, it has one vertex at point (0,<=0), and the opposite vertex at point (*x*,<=*y*). Of course, the sides of Vasya's favorite rectangle are parallel to the coordinate axes.
Vasya also loves triangles, if the triangles have one vertex at point *B*<==<=(0,<=0). That's why today he... | The first line contains two integers *x*,<=*y* (<=-<=109<=≤<=*x*,<=*y*<=≤<=109,<=*x*<=≠<=0,<=*y*<=≠<=0). | Print in the single line four integers *x*1,<=*y*1,<=*x*2,<=*y*2 — the coordinates of the required points. | [
"10 5\n",
"-10 5\n"
] | [
"0 15 15 0\n",
"-15 0 0 15\n"
] | <img class="tex-graphics" src="https://espresso.codeforces.com/a9ea2088c4294ce8f23801562fda36b830df2c3f.png" style="max-width: 100.0%;max-height: 100.0%;"/>
Figure to the first sample | 500 | [
{
"input": "10 5",
"output": "0 15 15 0"
},
{
"input": "-10 5",
"output": "-15 0 0 15"
},
{
"input": "20 -10",
"output": "0 -30 30 0"
},
{
"input": "-10 -1000000000",
"output": "-1000000010 0 0 -1000000010"
},
{
"input": "-1000000000 -1000000000",
"output": "-... | 1,376,120,506 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 124 | 0 | x = int(input())
y = int(input())
if x < 0:
print (abs(y) - x, 0, 0, abs(y) - x)
else:
print (0, abs(y) + x, abs(y) + x, 0) | Title: Vasily the Bear and Triangle
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasily the bear has a favorite rectangle, it has one vertex at point (0,<=0), and the opposite vertex at point (*x*,<=*y*). Of course, the sides of Vasya's favorite rectangle are parallel to the coordinate ... | ```python
x = int(input())
y = int(input())
if x < 0:
print (abs(y) - x, 0, 0, abs(y) - x)
else:
print (0, abs(y) + x, abs(y) + x, 0)
``` | -1 | |
109 | B | Lucky Probability | PROGRAMMING | 1,900 | [
"brute force",
"probabilities"
] | B. Lucky Probability | 2 | 256 | Petya loves lucky numbers. We all know that lucky numbers are the positive integers whose decimal representations contain only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.
Petya and his friend Vasya play an interesting game. Petya randomly chooses an integer *p* from the ... | The single line contains five integers *p**l*, *p**r*, *v**l*, *v**r* and *k* (1<=≤<=*p**l*<=≤<=*p**r*<=≤<=109,<=1<=≤<=*v**l*<=≤<=*v**r*<=≤<=109,<=1<=≤<=*k*<=≤<=1000). | On the single line print the result with an absolute error of no more than 10<=-<=9. | [
"1 10 1 10 2\n",
"5 6 8 10 1\n"
] | [
"0.320000000000\n",
"1.000000000000\n"
] | Consider that [*a*, *b*] denotes an interval of integers; this interval includes the boundaries. That is, <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/18b4a6012d95ad18891561410f0314497a578d63.png" style="max-width: 100.0%;max-height: 100.0%;"/>
In first case there are 32 suitable pairs:... | 1,000 | [
{
"input": "1 10 1 10 2",
"output": "0.320000000000"
},
{
"input": "5 6 8 10 1",
"output": "1.000000000000"
},
{
"input": "1 20 100 120 5",
"output": "0.150000000000"
},
{
"input": "1 10 1 10 3",
"output": "0.000000000000"
},
{
"input": "1 100 1 100 2",
"outpu... | 1,642,944,419 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 60 | 218 | 2,867,200 | def f(a,b,c,d):
return max(0,min(b,d)-max(a,c)+1)
def g(x):
if x < 1e9:
p.append(x)
g(10 * x + 4)
g( 10 * x + 7)
pl, pr, vl, vr, k = map(int, input().split())
p, x = [0, 1e9], 0
def g(x):
if x < 1e9:
p.append(x)
g(10 * x + 4), g( 10 * x + 7)
g(4... | Title: Lucky Probability
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Petya loves lucky numbers. We all know that lucky numbers are the positive integers whose decimal representations contain only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.
P... | ```python
def f(a,b,c,d):
return max(0,min(b,d)-max(a,c)+1)
def g(x):
if x < 1e9:
p.append(x)
g(10 * x + 4)
g( 10 * x + 7)
pl, pr, vl, vr, k = map(int, input().split())
p, x = [0, 1e9], 0
def g(x):
if x < 1e9:
p.append(x)
g(10 * x + 4), g( 10 * x +... | 3.940159 |
767 | A | Snacktower | PROGRAMMING | 1,100 | [
"data structures",
"implementation"
] | null | null | According to an old legeng, a long time ago Ankh-Morpork residents did something wrong to miss Fortune, and she cursed them. She said that at some time *n* snacks of distinct sizes will fall on the city, and the residents should build a Snacktower of them by placing snacks one on another. Of course, big snacks should b... | The first line contains single integer *n* (1<=≤<=*n*<=≤<=100<=000) — the total number of snacks.
The second line contains *n* integers, the *i*-th of them equals the size of the snack which fell on the *i*-th day. Sizes are distinct integers from 1 to *n*. | Print *n* lines. On the *i*-th of them print the sizes of the snacks which the residents placed on the top of the Snacktower on the *i*-th day in the order they will do that. If no snack is placed on some day, leave the corresponding line empty. | [
"3\n3 1 2\n",
"5\n4 5 1 2 3\n"
] | [
"3\n \n2 1",
"5 4\n \n \n3 2 1\n"
] | In the example a snack of size 3 fell on the first day, and the residents immediately placed it. On the second day a snack of size 1 fell, and the residents weren't able to place it because they were missing the snack of size 2. On the third day a snack of size 2 fell, and the residents immediately placed it. Right aft... | 500 | [
{
"input": "3\n3 1 2",
"output": "3 \n\n2 1 "
},
{
"input": "5\n4 5 1 2 3",
"output": "5 4 \n\n\n3 2 1 "
},
{
"input": "1\n1",
"output": "1 "
},
{
"input": "2\n1 2",
"output": "2 1 "
},
{
"input": "10\n5 1 6 2 8 3 4 10 9 7",
"output": "10 \n9 8 \n7 6 5 4 3 2 1... | 1,612,323,662 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 4 | 92 | 0 | n=int(input())
p=list(map(int,input().split()))
mx=n
mn=mx
for i in range(n):
a=p[i]
if a==mx:
s=""
for j in range(mx,mn-1,-1):
s=s+str(j)+" "
print(s)
mx=mn-1
else:
if a<mn:
mn=a
print()
| Title: Snacktower
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
According to an old legeng, a long time ago Ankh-Morpork residents did something wrong to miss Fortune, and she cursed them. She said that at some time *n* snacks of distinct sizes will fall on the city, and the residents sh... | ```python
n=int(input())
p=list(map(int,input().split()))
mx=n
mn=mx
for i in range(n):
a=p[i]
if a==mx:
s=""
for j in range(mx,mn-1,-1):
s=s+str(j)+" "
print(s)
mx=mn-1
else:
if a<mn:
mn=a
print()
``` | 0 | |
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"
... | 1,592,377,958 | 2,147,483,647 | PyPy 3 | OK | TESTS | 10 | 139 | 0 | n = int(input())
a = [[0] * n for i in range(n)]
for i in range(n):
for j in range(n):
if j == 0:
a[i][j] = 1
elif i == 0:
a[i][j] = 1
elif a[i][j] != 1:
a[i][j] = a[i - 1][j] + a[i][j - 1]
print(max(a[n - 1]))
| 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 = [[0] * n for i in range(n)]
for i in range(n):
for j in range(n):
if j == 0:
a[i][j] = 1
elif i == 0:
a[i][j] = 1
elif a[i][j] != 1:
a[i][j] = a[i - 1][j] + a[i][j - 1]
print(max(a[n - 1]))
``` | 3 | |
139 | A | Petr and Book | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | One Sunday Petr went to a bookshop and bought a new book on sports programming. The book had exactly *n* pages.
Petr decided to start reading it starting from the next day, that is, from Monday. Petr's got a very tight schedule and for each day of the week he knows how many pages he will be able to read on that day. S... | The first input line contains the single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of pages in the book.
The second line contains seven non-negative space-separated integers that do not exceed 1000 — those integers represent how many pages Petr can read on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and... | Print a single number — the number of the day of the week, when Petr will finish reading the book. The days of the week are numbered starting with one in the natural order: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday. | [
"100\n15 20 20 15 10 30 45\n",
"2\n1 0 0 0 0 0 0\n"
] | [
"6\n",
"1\n"
] | Note to the first sample:
By the end of Monday and therefore, by the beginning of Tuesday Petr has 85 pages left. He has 65 pages left by Wednesday, 45 by Thursday, 30 by Friday, 20 by Saturday and on Saturday Petr finishes reading the book (and he also has time to read 10 pages of something else).
Note to the second... | 500 | [
{
"input": "100\n15 20 20 15 10 30 45",
"output": "6"
},
{
"input": "2\n1 0 0 0 0 0 0",
"output": "1"
},
{
"input": "100\n100 200 100 200 300 400 500",
"output": "1"
},
{
"input": "3\n1 1 1 1 1 1 1",
"output": "3"
},
{
"input": "1\n1 1 1 1 1 1 1",
"output": "1... | 1,608,611,264 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 7 | 186 | 0 | n=int(input())
arr=[int(i) for i in input().split()]
flag=1
i=0
temp=n
while(flag):
i=i%temp
n=n-arr[i]
i=i+1
if n<=0:
print(i)
exit()
| Title: Petr and Book
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One Sunday Petr went to a bookshop and bought a new book on sports programming. The book had exactly *n* pages.
Petr decided to start reading it starting from the next day, that is, from Monday. Petr's got a very tight s... | ```python
n=int(input())
arr=[int(i) for i in input().split()]
flag=1
i=0
temp=n
while(flag):
i=i%temp
n=n-arr[i]
i=i+1
if n<=0:
print(i)
exit()
``` | -1 | |
127 | B | Canvas Frames | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | Nicholas, a painter is going to paint several new canvases. Nicholas is sure that the canvases will turn out so great that each one will need framing and being hung on the wall. Frames are what Nicholas decided to begin with.
Nicholas has *n* sticks whose lengths equal *a*1,<=*a*2,<=... *a**n*. Nicholas does not want... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=100) — the number of sticks. The second line contains *n* space-separated integers. The *i*-th integer equals the length of the *i*-th stick *a**i* (1<=≤<=*a**i*<=≤<=100). | Print the single number — the maximum number of frames Nicholas can make for his future canvases. | [
"5\n2 4 3 2 3\n",
"13\n2 2 4 4 4 4 6 6 6 7 7 9 9\n",
"4\n3 3 3 5\n"
] | [
"1",
"3",
"0"
] | none | 1,000 | [
{
"input": "5\n2 4 3 2 3",
"output": "1"
},
{
"input": "13\n2 2 4 4 4 4 6 6 6 7 7 9 9",
"output": "3"
},
{
"input": "4\n3 3 3 5",
"output": "0"
},
{
"input": "2\n3 5",
"output": "0"
},
{
"input": "9\n1 2 3 4 5 6 7 8 9",
"output": "0"
},
{
"input": "14\... | 1,677,514,792 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | #include <string>
using namespace std;
int main(){
cout << "Hello, World!";
return 0;
} | Title: Canvas Frames
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Nicholas, a painter is going to paint several new canvases. Nicholas is sure that the canvases will turn out so great that each one will need framing and being hung on the wall. Frames are what Nicholas decided to begin w... | ```python
#include <string>
using namespace std;
int main(){
cout << "Hello, World!";
return 0;
}
``` | -1 | |
0 | none | none | none | 0 | [
"none"
] | null | null | Little Petya very much likes arrays consisting of *n* integers, where each of them is in the range from 1 to 109, inclusive. Recently he has received one such array as a gift from his mother. Petya didn't like it at once. He decided to choose exactly one element from the array and replace it with another integer that a... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=105), which represents how many numbers the array has. The next line contains *n* space-separated integers — the array's description. All elements of the array lie in the range from 1 to 109, inclusive. | Print *n* space-separated integers — the minimum possible values of each array element after one replacement and the sorting are performed. | [
"5\n1 2 3 4 5\n",
"5\n2 3 4 5 6\n",
"3\n2 2 2\n"
] | [
"1 1 2 3 4\n",
"1 2 3 4 5\n",
"1 2 2\n"
] | none | 0 | [
{
"input": "5\n1 2 3 4 5",
"output": "1 1 2 3 4"
},
{
"input": "5\n2 3 4 5 6",
"output": "1 2 3 4 5"
},
{
"input": "3\n2 2 2",
"output": "1 2 2"
},
{
"input": "4\n1 1 2 3",
"output": "1 1 1 2"
},
{
"input": "3\n1 1 1",
"output": "1 1 2"
},
{
"input": "... | 1,698,226,817 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 97 | 340 | 13,926,400 | while True:
try:
n = int(input())
a = list(map(int, input().split()))
a.sort()
if a[-1] != 1:
a[-1] = 1
else:
a[-1] = 2
a.sort()
for num in a:
print(num, end=" ")
print()
except EOFEr... | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little Petya very much likes arrays consisting of *n* integers, where each of them is in the range from 1 to 109, inclusive. Recently he has received one such array as a gift from his mother. Petya didn't like it at once. He decid... | ```python
while True:
try:
n = int(input())
a = list(map(int, input().split()))
a.sort()
if a[-1] != 1:
a[-1] = 1
else:
a[-1] = 2
a.sort()
for num in a:
print(num, end=" ")
print()
ex... | 3 | |
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... | 1,599,569,360 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 218 | 307,200 | a=input("")
b=""
for c in a:
b+=c+" "
b=b.split()
c=""
d=""
while(len(b)!=0):
ret=b.pop(0)
if(len(c)!=0):
if(ret=='.'):
d+='1'
c=""
continue
if(ret=='-'):
d+='2'
c=""
continue
else:
if(ret=='.'):
d+='0'
continue
if(ret=='-'):
... | 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
a=input("")
b=""
for c in a:
b+=c+" "
b=b.split()
c=""
d=""
while(len(b)!=0):
ret=b.pop(0)
if(len(c)!=0):
if(ret=='.'):
d+='1'
c=""
continue
if(ret=='-'):
d+='2'
c=""
continue
else:
if(ret=='.'):
d+='0'
continue
if(r... | 3.944928 |
899 | D | Shovel Sale | PROGRAMMING | 1,800 | [
"constructive algorithms",
"math"
] | null | null | There are *n* shovels in Polycarp's shop. The *i*-th shovel costs *i* burles, that is, the first shovel costs 1 burle, the second shovel costs 2 burles, the third shovel costs 3 burles, and so on. Polycarps wants to sell shovels in pairs.
Visitors are more likely to buy a pair of shovels if their total cost ends with ... | The first line contains a single integer *n* (2<=≤<=*n*<=≤<=109) — the number of shovels in Polycarp's shop. | Print the number of pairs of shovels such that their total cost ends with maximum possible number of nines.
Note that it is possible that the largest number of 9s at the end is 0, then you should count all such ways.
It is guaranteed that for every *n*<=≤<=109 the answer doesn't exceed 2·109. | [
"7\n",
"14\n",
"50\n"
] | [
"3\n",
"9\n",
"1\n"
] | In the first example the maximum possible number of nines at the end is one. Polycarp cah choose the following pairs of shovels for that purpose:
- 2 and 7; - 3 and 6; - 4 and 5.
In the second example the maximum number of nines at the end of total cost of two shovels is one. The following pairs of shovels suit Po... | 1,750 | [
{
"input": "7",
"output": "3"
},
{
"input": "14",
"output": "9"
},
{
"input": "50",
"output": "1"
},
{
"input": "999999999",
"output": "499999999"
},
{
"input": "15",
"output": "11"
},
{
"input": "3",
"output": "3"
},
{
"input": "6500",
... | 1,593,428,623 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 4 | 93 | 6,963,200 | import sys
input=sys.stdin.buffer.readline
import os
from math import*
def func(x):
if n>=x:
val=(x-1)//2
else:
val=(n+n+1-x)//2
return max(0,val)
n=int(input())
x=[0,9,99,999,9999,99999,999999,9999999,99999999,999999999,9999999999]
s=n+n-1
if x[len(str(s))]==s:
print("1")
else:
ans=0
k... | Title: Shovel Sale
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There are *n* shovels in Polycarp's shop. The *i*-th shovel costs *i* burles, that is, the first shovel costs 1 burle, the second shovel costs 2 burles, the third shovel costs 3 burles, and so on. Polycarps wants to sell sh... | ```python
import sys
input=sys.stdin.buffer.readline
import os
from math import*
def func(x):
if n>=x:
val=(x-1)//2
else:
val=(n+n+1-x)//2
return max(0,val)
n=int(input())
x=[0,9,99,999,9999,99999,999999,9999999,99999999,999999999,9999999999]
s=n+n-1
if x[len(str(s))]==s:
print("1")
else:
... | 0 | |
725 | C | Hidden Word | PROGRAMMING | 1,600 | [
"brute force",
"constructive algorithms",
"implementation",
"strings"
] | null | null | Let’s define a grid to be a set of tiles with 2 rows and 13 columns. Each tile has an English letter written in it. The letters don't have to be unique: there might be two or more tiles with the same letter written on them. Here is an example of a grid:
We say that two tiles are adjacent if they share a side or a corn... | The only line of the input contains the string *s*, consisting of 27 upper-case English letters. Each English letter occurs at least once in *s*. | Output two lines, each consisting of 13 upper-case English characters, representing the rows of the grid. If there are multiple solutions, print any of them. If there is no solution print "Impossible". | [
"ABCDEFGHIJKLMNOPQRSGTUVWXYZ\n",
"BUVTYZFQSNRIWOXXGJLKACPEMDH\n"
] | [
"YXWVUTGHIJKLM\nZABCDEFSRQPON\n",
"Impossible\n"
] | none | 1,500 | [
{
"input": "ABCDEFGHIJKLMNOPQRSGTUVWXYZ",
"output": "YXWVUTGHIJKLM\nZABCDEFSRQPON"
},
{
"input": "BUVTYZFQSNRIWOXXGJLKACPEMDH",
"output": "Impossible"
},
{
"input": "DYCEUXXKMGZOINVPHWQSRTABLJF",
"output": "Impossible"
},
{
"input": "UTEDBZRVWLOFUASHCYIPXGJMKNQ",
"output"... | 1,623,264,632 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 3 | 108 | 2,252,800 | a=input()
for i in range(1,27):
if a[i]==a[i-1]:
print('Impossible')
break
else:
b=[[] for i in range(26)]
for i in range(27):
b['ABCDEFGHIJKLMNOPQRSTUVWXYZ'.find(a[i])].append(i)
c=[[' ' for i in range(13)] for j in range(2)]
j=0
for i in range(26):
i... | Title: Hidden Word
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Let’s define a grid to be a set of tiles with 2 rows and 13 columns. Each tile has an English letter written in it. The letters don't have to be unique: there might be two or more tiles with the same letter written on them.... | ```python
a=input()
for i in range(1,27):
if a[i]==a[i-1]:
print('Impossible')
break
else:
b=[[] for i in range(26)]
for i in range(27):
b['ABCDEFGHIJKLMNOPQRSTUVWXYZ'.find(a[i])].append(i)
c=[[' ' for i in range(13)] for j in range(2)]
j=0
for i in range(26):
... | -1 | |
340 | D | Bubble Sort Graph | PROGRAMMING | 1,500 | [
"binary search",
"data structures",
"dp"
] | null | null | Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with *n* elements *a*1, *a*2, ..., *a**n* in ascending order. He is bored of this so simple algorithm, so he invents his own graph. The graph (let's call it *G*) initially has *n* vertices and 0 edges. During Bubble Sort execution, ... | The first line of the input contains an integer *n* (2<=≤<=*n*<=≤<=105). The next line contains *n* distinct integers *a*1, *a*2, ..., *a**n* (1<=≤<=*a**i*<=≤<=*n*). | Output a single integer — the answer to the problem. | [
"3\n3 1 2\n"
] | [
"2\n"
] | Consider the first example. Bubble sort swaps elements 3 and 1. We add edge (1, 3). Permutation is now [1, 3, 2]. Then bubble sort swaps elements 3 and 2. We add edge (2, 3). Permutation is now sorted. We have a graph with 3 vertices and 2 edges (1, 3) and (2, 3). Its maximal independent set is [1, 2]. | 2,000 | [
{
"input": "3\n3 1 2",
"output": "2"
},
{
"input": "5\n4 2 1 3 5",
"output": "3"
},
{
"input": "10\n1 9 8 10 2 3 4 6 5 7",
"output": "6"
},
{
"input": "50\n12 24 42 43 36 3 40 29 7 34 10 13 28 9 35 23 25 21 19 4 20 18 11 38 41 48 6 46 33 17 31 37 2 30 32 44 45 5 47 49 16 15 5... | 1,438,387,096 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 21 | 1,000 | 3,379,200 | import sys; sys.setrecursionlimit(1000000)
def solve():
# 3 1 2 4
# 1 2 3 4
# 2 1 3 5 4
# 1 2 3 4 5
n, = rv()
a, = rl(1)
# 3 1 2 7 4 6 5
# [ , 1 , , , , ]
# [ , 1 , 2 , , , ]
# [ , 1 , 2 , 4, 5, ]
mem = [10000000] * (n + 1)
mem[1] = a[0]
for i in range(1, n):
... | Title: Bubble Sort Graph
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Iahub recently has learned Bubble Sort, an algorithm that is used to sort a permutation with *n* elements *a*1, *a*2, ..., *a**n* in ascending order. He is bored of this so simple algorithm, so he invents his own grap... | ```python
import sys; sys.setrecursionlimit(1000000)
def solve():
# 3 1 2 4
# 1 2 3 4
# 2 1 3 5 4
# 1 2 3 4 5
n, = rv()
a, = rl(1)
# 3 1 2 7 4 6 5
# [ , 1 , , , , ]
# [ , 1 , 2 , , , ]
# [ , 1 , 2 , 4, 5, ]
mem = [10000000] * (n + 1)
mem[1] = a[0]
for i in ran... | 0 | |
929 | B | Места в самолёте | PROGRAMMING | 1,300 | [
"*special",
"implementation"
] | null | null | В самолёте есть *n* рядов мест. Если смотреть на ряды сверху, то в каждом ряду есть 3 места слева, затем проход между рядами, затем 4 центральных места, затем ещё один проход между рядами, а затем ещё 3 места справа.
Известно, что некоторые места уже заняты пассажирами. Всего есть два вида пассажиров — статусные (те, ... | В первой строке следуют два целых числа *n* и *k* (1<=≤<=*n*<=≤<=100, 1<=≤<=*k*<=≤<=10·*n*) — количество рядов мест в самолёте и количество пассажиров, которых нужно рассадить.
Далее следует описание рядов мест самолёта по одному ряду в строке. Если очередной символ равен '-', то это проход между рядами. Если очередно... | В первую строку выведите минимальное суммарное число соседей у статусных пассажиров.
Далее выведите план рассадки пассажиров, который минимизирует суммарное количество соседей у статусных пассажиров, в том же формате, что и во входных данных. Если в свободное место нужно посадить одного из *k* пассажиров, выведите стр... | [
"1 2\nSP.-SS.S-S.S\n",
"4 9\nPP.-PPPS-S.S\nPSP-PPSP-.S.\n.S.-S..P-SS.\nP.S-P.PP-PSP\n"
] | [
"5\nSPx-SSxS-S.S\n",
"15\nPPx-PPPS-S.S\nPSP-PPSP-xSx\nxSx-SxxP-SSx\nP.S-PxPP-PSP\n"
] | В первом примере нужно посадить ещё двух обычных пассажиров. Для минимизации соседей у статусных пассажиров, нужно посадить первого из них на третье слева место, а второго на любое из оставшихся двух мест, так как независимо от выбора места он станет соседом двух статусных пассажиров.
Изначально, у статусного пассажи... | 1,000 | [
{
"input": "1 2\nSP.-SS.S-S.S",
"output": "5\nSPx-SSxS-S.S"
},
{
"input": "4 9\nPP.-PPPS-S.S\nPSP-PPSP-.S.\n.S.-S..P-SS.\nP.S-P.PP-PSP",
"output": "15\nPPx-PPPS-S.S\nPSP-PPSP-xSx\nxSx-SxxP-SSx\nP.S-PxPP-PSP"
},
{
"input": "3 7\n.S.-SSSP-..S\nS..-.SPP-S.P\n.S.-PPPP-PSP",
"output": "13... | 1,677,336,688 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 2 | 46 | 0 | k,n = map(int, input().split())
ans = []
for _ in range(3):
ans.append([])
plane = []
c = 0
for i in range(k):
s = input()
plane.append(list(s))
for j in range(len(s)):
if s[j] == '.':
if j == 0:
if s[1] == 'S':
ans[1].append([i,j])
... | Title: Места в самолёте
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
В самолёте есть *n* рядов мест. Если смотреть на ряды сверху, то в каждом ряду есть 3 места слева, затем проход между рядами, затем 4 центральных места, затем ещё один проход между рядами, а затем ещё 3 места справа.
... | ```python
k,n = map(int, input().split())
ans = []
for _ in range(3):
ans.append([])
plane = []
c = 0
for i in range(k):
s = input()
plane.append(list(s))
for j in range(len(s)):
if s[j] == '.':
if j == 0:
if s[1] == 'S':
ans[1].append... | 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":... | 1,676,312,069 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 31 | 0 | m = []
n = int(input("num"))
for i in range(n):
m.append(input())
print(m)
for i in m :
a = len (i)
if a >= 10 :
print(i[0],end='')
print(a-2 ,end='' )
print(i[-1])
else:
print(i) | 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
m = []
n = int(input("num"))
for i in range(n):
m.append(input())
print(m)
for i in m :
a = len (i)
if a >= 10 :
print(i[0],end='')
print(a-2 ,end='' )
print(i[-1])
else:
print(i)
``` | 0 |
224 | B | Array | PROGRAMMING | 1,500 | [
"bitmasks",
"implementation",
"two pointers"
] | null | null | You've got an array *a*, consisting of *n* integers: *a*1,<=*a*2,<=...,<=*a**n*. Your task is to find a minimal by inclusion segment [*l*,<=*r*] (1<=≤<=*l*<=≤<=*r*<=≤<=*n*) such, that among numbers *a**l*,<= *a**l*<=+<=1,<= ...,<= *a**r* there are exactly *k* distinct numbers.
Segment [*l*,<=*r*] (1<=≤<=*l*<=≤<=*r*<=≤... | The first line contains two space-separated integers: *n* and *k* (1<=≤<=*n*,<=*k*<=≤<=105). The second line contains *n* space-separated integers *a*1,<=*a*2,<=...,<=*a**n* — elements of the array *a* (1<=≤<=*a**i*<=≤<=105). | Print a space-separated pair of integers *l* and *r* (1<=≤<=*l*<=≤<=*r*<=≤<=*n*) such, that the segment [*l*,<=*r*] is the answer to the problem. If the sought segment does not exist, print "-1 -1" without the quotes. If there are multiple correct answers, print any of them. | [
"4 2\n1 2 2 3\n",
"8 3\n1 1 2 2 3 3 4 5\n",
"7 4\n4 7 7 4 7 4 7\n"
] | [
"1 2\n",
"2 5\n",
"-1 -1\n"
] | In the first sample among numbers *a*<sub class="lower-index">1</sub> and *a*<sub class="lower-index">2</sub> there are exactly two distinct numbers.
In the second sample segment [2, 5] is a minimal by inclusion segment with three distinct numbers, but it is not minimal in length among such segments.
In the third sam... | 1,000 | [
{
"input": "4 2\n1 2 2 3",
"output": "1 2"
},
{
"input": "8 3\n1 1 2 2 3 3 4 5",
"output": "2 5"
},
{
"input": "7 4\n4 7 7 4 7 4 7",
"output": "-1 -1"
},
{
"input": "5 1\n1 7 2 3 2",
"output": "1 1"
},
{
"input": "1 2\n666",
"output": "-1 -1"
},
{
"inp... | 1,606,194,516 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 186 | 307,200 | [n, k] = list(map(int, input().split()))
a = list(map(int, input().split()))[:n]
L = 1
R = 0
temp = 0
tempDict = {}
for i in range(n):
cur = a[i]
if(cur == a[i - 1]):
L = L + 1
if(cur not in tempDict):
tempDict[cur] = True
temp = temp + 1
if(temp == k):
... | Title: Array
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You've got an array *a*, consisting of *n* integers: *a*1,<=*a*2,<=...,<=*a**n*. Your task is to find a minimal by inclusion segment [*l*,<=*r*] (1<=≤<=*l*<=≤<=*r*<=≤<=*n*) such, that among numbers *a**l*,<= *a**l*<=+<=1,<= ...,<... | ```python
[n, k] = list(map(int, input().split()))
a = list(map(int, input().split()))[:n]
L = 1
R = 0
temp = 0
tempDict = {}
for i in range(n):
cur = a[i]
if(cur == a[i - 1]):
L = L + 1
if(cur not in tempDict):
tempDict[cur] = True
temp = temp + 1
if(temp ... | 0 | |
41 | A | Translation | PROGRAMMING | 800 | [
"implementation",
"strings"
] | A. Translation | 2 | 256 | The translation from the Berland language into the Birland language is not an easy task. Those languages are very similar: a berlandish word differs from a birlandish word with the same meaning a little: it is spelled (and pronounced) reversely. For example, a Berlandish word code corresponds to a Birlandish word edoc.... | The first line contains word *s*, the second line contains word *t*. The words consist of lowercase Latin letters. The input data do not consist unnecessary spaces. The words are not empty and their lengths do not exceed 100 symbols. | If the word *t* is a word *s*, written reversely, print YES, otherwise print NO. | [
"code\nedoc\n",
"abb\naba\n",
"code\ncode\n"
] | [
"YES\n",
"NO\n",
"NO\n"
] | none | 500 | [
{
"input": "code\nedoc",
"output": "YES"
},
{
"input": "abb\naba",
"output": "NO"
},
{
"input": "code\ncode",
"output": "NO"
},
{
"input": "abacaba\nabacaba",
"output": "YES"
},
{
"input": "q\nq",
"output": "YES"
},
{
"input": "asrgdfngfnmfgnhweratgjkk... | 1,666,958,336 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 9 | 62 | 0 | str = input()
str2 = input()
sum = 0
for i in range(len(str)):
if str[i] == str2[-i - 1]:
sum += 1
if sum == len(str):
print('YES')
else:
print('NO') | Title: Translation
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
The translation from the Berland language into the Birland language is not an easy task. Those languages are very similar: a berlandish word differs from a birlandish word with the same meaning a little: it is spelled (and pron... | ```python
str = input()
str2 = input()
sum = 0
for i in range(len(str)):
if str[i] == str2[-i - 1]:
sum += 1
if sum == len(str):
print('YES')
else:
print('NO')
``` | -1 |
50 | A | Domino piling | PROGRAMMING | 800 | [
"greedy",
"math"
] | A. Domino piling | 2 | 256 | You are given a rectangular board of *M*<=×<=*N* squares. Also you are given an unlimited number of standard domino pieces of 2<=×<=1 squares. You are allowed to rotate the pieces. You are asked to place as many dominoes as possible on the board so as to meet the following conditions:
1. Each domino completely covers ... | In a single line you are given two integers *M* and *N* — board sizes in squares (1<=≤<=*M*<=≤<=*N*<=≤<=16). | Output one number — the maximal number of dominoes, which can be placed. | [
"2 4\n",
"3 3\n"
] | [
"4\n",
"4\n"
] | none | 500 | [
{
"input": "2 4",
"output": "4"
},
{
"input": "3 3",
"output": "4"
},
{
"input": "1 5",
"output": "2"
},
{
"input": "1 6",
"output": "3"
},
{
"input": "1 15",
"output": "7"
},
{
"input": "1 16",
"output": "8"
},
{
"input": "2 5",
"outpu... | 1,628,054,433 | 2,147,483,647 | Python 3 | OK | TESTS | 35 | 154 | 6,758,400 | inp = input().split()
board = int(inp[0]) * int(inp[1])
if board % 2 == 0:
print(int(board / 2))
else:
print(int((board - 1)/2)) | Title: Domino piling
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
You are given a rectangular board of *M*<=×<=*N* squares. Also you are given an unlimited number of standard domino pieces of 2<=×<=1 squares. You are allowed to rotate the pieces. You are asked to place as many dominoes as p... | ```python
inp = input().split()
board = int(inp[0]) * int(inp[1])
if board % 2 == 0:
print(int(board / 2))
else:
print(int((board - 1)/2))
``` | 3.948911 |
602 | B | Approximating a Constant Range | PROGRAMMING | 1,400 | [
"dp",
"implementation",
"two pointers"
] | null | null | When Xellos was doing a practice course in university, he once had to measure the intensity of an effect that slowly approached equilibrium. A good way to determine the equilibrium intensity would be choosing a sufficiently large number of consecutive data points that seems as constant as possible and taking their aver... | The first line of the input contains a single integer *n* (2<=≤<=*n*<=≤<=100<=000) — the number of data points.
The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=100<=000). | Print a single number — the maximum length of an almost constant range of the given sequence. | [
"5\n1 2 3 3 2\n",
"11\n5 4 5 5 6 7 8 8 8 7 6\n"
] | [
"4\n",
"5\n"
] | In the first sample, the longest almost constant range is [2, 5]; its length (the number of data points in it) is 4.
In the second sample, there are three almost constant ranges of length 4: [1, 4], [6, 9] and [7, 10]; the only almost constant range of the maximum length 5 is [6, 10]. | 1,000 | [
{
"input": "5\n1 2 3 3 2",
"output": "4"
},
{
"input": "11\n5 4 5 5 6 7 8 8 8 7 6",
"output": "5"
},
{
"input": "2\n3 2",
"output": "2"
},
{
"input": "4\n1001 1000 1000 1001",
"output": "4"
},
{
"input": "4\n1 1 2 3",
"output": "3"
},
{
"input": "3\n1 ... | 1,448,384,384 | 1,484 | Python 3 | WRONG_ANSWER | PRETESTS | 1 | 46 | 409,600 | n = int(input())
a = list(map(int, input().split()))
left = 0
right = 1
count = [0] * 100001
max1 = a[1]
min1 = a[0]
if max1 < min1:
max1, min1 = min1, max1
count[a[0]] = 1
count[a[1]] = 1
maxans = -1
while right < n:
count[a[right]] += 1
max1 = max(max1, a[right])
min1 = min(min1, a[righ... | Title: Approximating a Constant Range
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
When Xellos was doing a practice course in university, he once had to measure the intensity of an effect that slowly approached equilibrium. A good way to determine the equilibrium intensity would be choo... | ```python
n = int(input())
a = list(map(int, input().split()))
left = 0
right = 1
count = [0] * 100001
max1 = a[1]
min1 = a[0]
if max1 < min1:
max1, min1 = min1, max1
count[a[0]] = 1
count[a[1]] = 1
maxans = -1
while right < n:
count[a[right]] += 1
max1 = max(max1, a[right])
min1 = min(mi... | 0 | |
677 | A | Vanya and Fence | PROGRAMMING | 800 | [
"implementation"
] | null | null | Vanya and his friends are walking along the fence of height *h* and they do not want the guard to notice them. In order to achieve this the height of each of the friends should not exceed *h*. If the height of some person is greater than *h* he can bend down and then he surely won't be noticed by the guard. The height ... | The first line of the input contains two integers *n* and *h* (1<=≤<=*n*<=≤<=1000, 1<=≤<=*h*<=≤<=1000) — the number of friends and the height of the fence, respectively.
The second line contains *n* integers *a**i* (1<=≤<=*a**i*<=≤<=2*h*), the *i*-th of them is equal to the height of the *i*-th person. | Print a single integer — the minimum possible valid width of the road. | [
"3 7\n4 5 14\n",
"6 1\n1 1 1 1 1 1\n",
"6 5\n7 6 8 9 10 5\n"
] | [
"4\n",
"6\n",
"11\n"
] | In the first sample, only person number 3 must bend down, so the required width is equal to 1 + 1 + 2 = 4.
In the second sample, all friends are short enough and no one has to bend, so the width 1 + 1 + 1 + 1 + 1 + 1 = 6 is enough.
In the third sample, all the persons have to bend, except the last one. The required m... | 500 | [
{
"input": "3 7\n4 5 14",
"output": "4"
},
{
"input": "6 1\n1 1 1 1 1 1",
"output": "6"
},
{
"input": "6 5\n7 6 8 9 10 5",
"output": "11"
},
{
"input": "10 420\n214 614 297 675 82 740 174 23 255 15",
"output": "13"
},
{
"input": "10 561\n657 23 1096 487 785 66 481... | 1,691,610,440 | 2,147,483,647 | Python 3 | OK | TESTS | 29 | 46 | 0 | a=input()
a=a.split(" ")
n,h=int(a[0]),int(a[1])
m=map(int,input().split())
s=0
for i in m:
if i<=h:
s+=1
else:
s+=2
print(s) | Title: Vanya and Fence
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vanya and his friends are walking along the fence of height *h* and they do not want the guard to notice them. In order to achieve this the height of each of the friends should not exceed *h*. If the height of some pers... | ```python
a=input()
a=a.split(" ")
n,h=int(a[0]),int(a[1])
m=map(int,input().split())
s=0
for i in m:
if i<=h:
s+=1
else:
s+=2
print(s)
``` | 3 | |
710 | B | Optimal Point on a Line | PROGRAMMING | 1,400 | [
"brute force",
"sortings"
] | null | null | You are given *n* points on a line with their coordinates *x**i*. Find the point *x* so the sum of distances to the given points is minimal. | The first line contains integer *n* (1<=≤<=*n*<=≤<=3·105) — the number of points on the line.
The second line contains *n* integers *x**i* (<=-<=109<=≤<=*x**i*<=≤<=109) — the coordinates of the given *n* points. | Print the only integer *x* — the position of the optimal point on the line. If there are several optimal points print the position of the leftmost one. It is guaranteed that the answer is always the integer. | [
"4\n1 2 3 4\n"
] | [
"2\n"
] | none | 0 | [
{
"input": "4\n1 2 3 4",
"output": "2"
},
{
"input": "5\n-1 -10 2 6 7",
"output": "2"
},
{
"input": "10\n-68 10 87 22 30 89 82 -97 -52 25",
"output": "22"
},
{
"input": "100\n457 827 807 17 871 935 907 -415 536 170 551 -988 865 758 -457 -892 -875 -488 684 19 0 555 -807 -624 -... | 1,564,439,913 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 93 | 0 | import sys
import math
import os
# To store no of test cases here (2).
#t=int(sys.stdin.readline()) #
# To store input here (0 1 1) and (0 1 2).
n = int(sys.stdin.readline())
b = sys.stdin.readline().split()
nums = []
counter = 0
for x in range(len(b)):
nums.append(int(b[x]))
counter += nums[x]
co... | Title: Optimal Point on a Line
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given *n* points on a line with their coordinates *x**i*. Find the point *x* so the sum of distances to the given points is minimal.
Input Specification:
The first line contains integer *n* (1<=≤<=*n*<=... | ```python
import sys
import math
import os
# To store no of test cases here (2).
#t=int(sys.stdin.readline()) #
# To store input here (0 1 1) and (0 1 2).
n = int(sys.stdin.readline())
b = sys.stdin.readline().split()
nums = []
counter = 0
for x in range(len(b)):
nums.append(int(b[x]))
counter += num... | 0 | |
9 | B | Running Student | PROGRAMMING | 1,200 | [
"brute force",
"geometry",
"implementation"
] | B. Running Student | 1 | 64 | And again a misfortune fell on Poor Student. He is being late for an exam.
Having rushed to a bus stop that is in point (0,<=0), he got on a minibus and they drove along a straight line, parallel to axis *OX*, in the direction of increasing *x*.
Poor Student knows the following:
- during one run the minibus makes ... | The first line contains three integer numbers: 2<=≤<=*n*<=≤<=100, 1<=≤<=*v**b*,<=*v**s*<=≤<=1000. The second line contains *n* non-negative integers in ascending order: coordinates *x**i* of the bus stop with index *i*. It is guaranteed that *x*1 equals to zero, and *x**n*<=≤<=105. The third line contains the coordinat... | In the only line output the answer to the problem — index of the optimum bus stop. | [
"4 5 2\n0 2 4 6\n4 1\n",
"2 1 1\n0 100000\n100000 100000\n"
] | [
"3",
"2"
] | As you know, students are a special sort of people, and minibuses usually do not hurry. That's why you should not be surprised, if Student's speed is higher than the speed of the minibus. | 0 | [
{
"input": "4 5 2\n0 2 4 6\n4 1",
"output": "3"
},
{
"input": "2 1 1\n0 100000\n100000 100000",
"output": "2"
},
{
"input": "6 5 1\n0 1 2 3 4 5\n0 0",
"output": "2"
},
{
"input": "4 100 10\n0 118 121 178\n220 220",
"output": "4"
},
{
"input": "4 3 3\n0 6 8 10\n7 -... | 1,587,150,822 | 2,147,483,647 | Python 3 | OK | TESTS | 23 | 216 | 307,200 | import math
# functie pentru calculul distantei
def dist( x1, y1, x2, y2 ):
return math.sqrt( ( x2 - x1 ) ** 2 + ( y2 - y1 ) ** 2 )
n, vb, vs = map( int, input( ).split( ) )
stations = list( map( int, input( ).split( ) ) )
xu, yu = map( int, input( ).split( ) )
minStation, Shortest_time = None, None
for... | Title: Running Student
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
And again a misfortune fell on Poor Student. He is being late for an exam.
Having rushed to a bus stop that is in point (0,<=0), he got on a minibus and they drove along a straight line, parallel to axis *OX*, in the direct... | ```python
import math
# functie pentru calculul distantei
def dist( x1, y1, x2, y2 ):
return math.sqrt( ( x2 - x1 ) ** 2 + ( y2 - y1 ) ** 2 )
n, vb, vs = map( int, input( ).split( ) )
stations = list( map( int, input( ).split( ) ) )
xu, yu = map( int, input( ).split( ) )
minStation, Shortest_time = None, N... | 3.889711 |
178 | A1 | Educational Game | PROGRAMMING | 1,000 | [] | null | null | The Smart Beaver from ABBYY began to develop a new educational game for children. The rules of the game are fairly simple and are described below.
The playing field is a sequence of *n* non-negative integers *a**i* numbered from 1 to *n*. The goal of the game is to make numbers *a*1,<=*a*2,<=...,<=*a**k* (i.e. some pr... | The first input line contains a single integer *n*. The second line contains *n* integers *a**i* (0<=≤<=*a**i*<=≤<=104), separated by single spaces.
The input limitations for getting 20 points are:
- 1<=≤<=*n*<=≤<=300
The input limitations for getting 50 points are:
- 1<=≤<=*n*<=≤<=2000
The input limitations f... | Print exactly *n*<=-<=1 lines: the *k*-th output line must contain the minimum number of moves needed to make the first *k* elements of the original sequence *a**i* equal to zero.
Please do not use the %lld specifier to read or write 64-bit integers in С++. It is preferred to use the cin, cout streams, or the %I64d sp... | [
"4\n1 0 1 2\n",
"8\n1 2 3 4 5 6 7 8\n"
] | [
"1\n1\n3\n",
"1\n3\n6\n10\n16\n24\n40\n"
] | none | 20 | [
{
"input": "4\n1 0 1 2",
"output": "1\n1\n3"
},
{
"input": "8\n1 2 3 4 5 6 7 8",
"output": "1\n3\n6\n10\n16\n24\n40"
},
{
"input": "5\n4 1 4 7 6",
"output": "4\n5\n9\n17"
},
{
"input": "9\n13 13 7 11 3 9 3 5 5",
"output": "13\n26\n33\n44\n47\n69\n79\n117"
},
{
"in... | 1,658,937,731 | 2,147,483,647 | Python 3 | OK | TESTS1 | 12 | 92 | 0 | import math
def num(i,n):
return math.floor(math.log2(n-i))
n = int(input())
a = list(map(int, input().split()))
ls = []
temp = 0
for i in range(n-1):
if a[i] !=0:
a[i+2**num(i,n-1)] += a[i]
temp += a[i]
a[i] = 0
ls.append(temp)
for i in ls:
print(i) | Title: Educational Game
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Smart Beaver from ABBYY began to develop a new educational game for children. The rules of the game are fairly simple and are described below.
The playing field is a sequence of *n* non-negative integers *a**i* nu... | ```python
import math
def num(i,n):
return math.floor(math.log2(n-i))
n = int(input())
a = list(map(int, input().split()))
ls = []
temp = 0
for i in range(n-1):
if a[i] !=0:
a[i+2**num(i,n-1)] += a[i]
temp += a[i]
a[i] = 0
ls.append(temp)
for i in ls:
print(i)
``` | 3 | |
243 | B | Hydra | PROGRAMMING | 2,000 | [
"graphs",
"sortings"
] | null | null | One day Petya got a birthday present from his mom: a book called "The Legends and Myths of Graph Theory". From this book Petya learned about a hydra graph.
A non-oriented graph is a hydra, if it has a structure, shown on the figure below. Namely, there are two nodes *u* and *v* connected by an edge, they are the hydra... | The first line contains four integers *n*, *m*, *h*, *t* (1<=≤<=*n*,<=*m*<=≤<=105, 1<=≤<=*h*,<=*t*<=≤<=100) — the number of nodes and edges in graph *G*, and the number of a hydra's heads and tails.
Next *m* lines contain the description of the edges of graph *G*. The *i*-th of these lines contains two integers *a**i*... | If graph *G* has no hydra, print "NO" (without the quotes).
Otherwise, in the first line print "YES" (without the quotes). In the second line print two integers — the numbers of nodes *u* and *v*. In the third line print *h* numbers — the numbers of the nodes that are the heads. In the fourth line print *t* numbers — ... | [
"9 12 2 3\n1 2\n2 3\n1 3\n1 4\n2 5\n4 5\n4 6\n6 5\n6 7\n7 5\n8 7\n9 1\n",
"7 10 3 3\n1 2\n2 3\n1 3\n1 4\n2 5\n4 5\n4 6\n6 5\n6 7\n7 5\n"
] | [
"YES\n4 1\n5 6 \n9 3 2 \n",
"NO\n"
] | The first sample is depicted on the picture below: | 1,000 | [] | 1,382,020,636 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 124 | 307,200 | token = input().split()
n = int(token[0])
m = int(token[1])
h = int(token[2])
t = int(token[3])
g = [[] for x in range(n)]
for i in range(m):
token = [int(x) - 1 for x in input().split()]
g[token[0]].append(token[1])
g[token[1]].append(token[0])
posible_u = list(filter(lambda x: len(g[x]) > ... | Title: Hydra
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day Petya got a birthday present from his mom: a book called "The Legends and Myths of Graph Theory". From this book Petya learned about a hydra graph.
A non-oriented graph is a hydra, if it has a structure, shown on the fig... | ```python
token = input().split()
n = int(token[0])
m = int(token[1])
h = int(token[2])
t = int(token[3])
g = [[] for x in range(n)]
for i in range(m):
token = [int(x) - 1 for x in input().split()]
g[token[0]].append(token[1])
g[token[1]].append(token[0])
posible_u = list(filter(lambda x: le... | 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":... | 1,679,766,338 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | n=int(input())
arr=[]
for u in range(n):
arr.append(input())
for i in arr:
if len(i>10):
print(i[0]+str(len(i)-2)+i[-1])
else:
print(i)
| 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
n=int(input())
arr=[]
for u in range(n):
arr.append(input())
for i in arr:
if len(i>10):
print(i[0]+str(len(i)-2)+i[-1])
else:
print(i)
``` | -1 |
120 | F | Spiders | PROGRAMMING | 1,400 | [
"dp",
"greedy",
"trees"
] | null | null | One day mum asked Petya to sort his toys and get rid of some of them. Petya found a whole box of toy spiders. They were quite dear to him and the boy didn't want to throw them away. Petya conjured a cunning plan: he will glue all the spiders together and attach them to the ceiling. Besides, Petya knows that the lower t... | The first input file line contains one integer *n* (1<=≤<=*n*<=≤<=100) — the number of spiders. Next *n* lines contain the descriptions of each spider: integer *n**i* (2<=≤<=*n**i*<=≤<=100) — the number of beads, then *n**i*<=-<=1 pairs of numbers denoting the numbers of the beads connected by threads. The beads that m... | Print a single number — the length of the required construction. | [
"1\n3 1 2 2 3\n",
"2\n3 1 2 1 3\n4 1 2 2 3 2 4\n",
"2\n5 1 2 2 3 3 4 3 5\n7 3 4 1 2 2 4 4 6 2 7 6 5\n"
] | [
"2\n",
"4\n",
"7\n"
] | none | 0 | [
{
"input": "1\n3 1 2 2 3",
"output": "2"
},
{
"input": "2\n3 1 2 1 3\n4 1 2 2 3 2 4",
"output": "4"
},
{
"input": "2\n5 1 2 2 3 3 4 3 5\n7 3 4 1 2 2 4 4 6 2 7 6 5",
"output": "7"
},
{
"input": "3\n3 1 2 2 3\n5 2 5 5 3 3 4 5 1\n9 6 5 5 9 4 8 4 7 2 1 2 6 2 4 6 3",
"output":... | 1,630,448,901 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 124 | 6,963,200 | # _
#####################################################################################################################
class Spider(object):
def __init__(self, info):
self.__nBeads, *self.__threads = info
def __len__(self):
connections = [0]*(self.__nBeads+1)
for i in range... | Title: Spiders
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day mum asked Petya to sort his toys and get rid of some of them. Petya found a whole box of toy spiders. They were quite dear to him and the boy didn't want to throw them away. Petya conjured a cunning plan: he will glue a... | ```python
# _
#####################################################################################################################
class Spider(object):
def __init__(self, info):
self.__nBeads, *self.__threads = info
def __len__(self):
connections = [0]*(self.__nBeads+1)
for ... | -1 | |
779 | C | Dishonest Sellers | PROGRAMMING | 1,200 | [
"constructive algorithms",
"greedy",
"sortings"
] | null | null | Igor found out discounts in a shop and decided to buy *n* items. Discounts at the store will last for a week and Igor knows about each item that its price now is *a**i*, and after a week of discounts its price will be *b**i*.
Not all of sellers are honest, so now some products could be more expensive than after a week... | In the first line there are two positive integer numbers *n* and *k* (1<=≤<=*n*<=≤<=2·105, 0<=≤<=*k*<=≤<=*n*) — total number of items to buy and minimal number of items Igor wants to by right now.
The second line contains sequence of integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=104) — prices of items during d... | Print the minimal amount of money Igor will spend to buy all *n* items. Remember, he should buy at least *k* items right now. | [
"3 1\n5 4 6\n3 1 5\n",
"5 3\n3 4 7 10 3\n4 5 5 12 5\n"
] | [
"10\n",
"25\n"
] | In the first example Igor should buy item 3 paying 6. But items 1 and 2 he should buy after a week. He will pay 3 and 1 for them. So in total he will pay 6 + 3 + 1 = 10.
In the second example Igor should buy right now items 1, 2, 4 and 5, paying for them 3, 4, 10 and 3, respectively. Item 3 he should buy after a week ... | 1,000 | [
{
"input": "3 1\n5 4 6\n3 1 5",
"output": "10"
},
{
"input": "5 3\n3 4 7 10 3\n4 5 5 12 5",
"output": "25"
},
{
"input": "1 0\n9\n8",
"output": "8"
},
{
"input": "2 0\n4 10\n1 2",
"output": "3"
},
{
"input": "4 2\n19 5 17 13\n3 18 8 10",
"output": "29"
},
... | 1,630,318,571 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 7 | 296 | 38,912,000 | n, k = map(int, input().split())
a = [int(i) for i in input().split()]
b = [int(i) for i in input().split()]
T = [0] * n
for i in range(n):
T[i] = (a[i] - b[i], i)
T.sort(key=lambda x: x[0])
total_result = 0
indexes = []
for i in range(k):
total_result += a[T[i][1]]
i = k
while T[i][0] <= 0:
to... | Title: Dishonest Sellers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Igor found out discounts in a shop and decided to buy *n* items. Discounts at the store will last for a week and Igor knows about each item that its price now is *a**i*, and after a week of discounts its price will be... | ```python
n, k = map(int, input().split())
a = [int(i) for i in input().split()]
b = [int(i) for i in input().split()]
T = [0] * n
for i in range(n):
T[i] = (a[i] - b[i], i)
T.sort(key=lambda x: x[0])
total_result = 0
indexes = []
for i in range(k):
total_result += a[T[i][1]]
i = k
while T[i][0] <= ... | -1 | |
622 | A | Infinite Sequence | PROGRAMMING | 1,000 | [
"implementation",
"math"
] | null | null | Consider the infinite sequence of integers: 1,<=1,<=2,<=1,<=2,<=3,<=1,<=2,<=3,<=4,<=1,<=2,<=3,<=4,<=5.... The sequence is built in the following way: at first the number 1 is written out, then the numbers from 1 to 2, then the numbers from 1 to 3, then the numbers from 1 to 4 and so on. Note that the sequence contains ... | The only line contains integer *n* (1<=≤<=*n*<=≤<=1014) — the position of the number to find.
Note that the given number is too large, 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. | Print the element in the *n*-th position of the sequence (the elements are numerated from one). | [
"3\n",
"5\n",
"10\n",
"55\n",
"56\n"
] | [
"2\n",
"2\n",
"4\n",
"10\n",
"1\n"
] | none | 0 | [
{
"input": "3",
"output": "2"
},
{
"input": "5",
"output": "2"
},
{
"input": "10",
"output": "4"
},
{
"input": "55",
"output": "10"
},
{
"input": "56",
"output": "1"
},
{
"input": "1000000000000",
"output": "88209"
},
{
"input": "8471941278... | 1,688,951,817 | 2,147,483,647 | Python 3 | MEMORY_LIMIT_EXCEEDED | TESTS | 5 | 514 | 268,390,400 | def s(x):
return [i for i in range(1,x+1)]
n=int(input())
a=[]
i=1
while True:
a+=s(i)
if n<=len(a):
print(a[n-1])
break
i+=1
| Title: Infinite Sequence
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Consider the infinite sequence of integers: 1,<=1,<=2,<=1,<=2,<=3,<=1,<=2,<=3,<=4,<=1,<=2,<=3,<=4,<=5.... The sequence is built in the following way: at first the number 1 is written out, then the numbers from 1 to 2,... | ```python
def s(x):
return [i for i in range(1,x+1)]
n=int(input())
a=[]
i=1
while True:
a+=s(i)
if n<=len(a):
print(a[n-1])
break
i+=1
``` | 0 | |
88 | B | Keyboard | PROGRAMMING | 1,500 | [
"implementation"
] | B. Keyboard | 1 | 256 | Vasya learns to type. He has an unusual keyboard at his disposal: it is rectangular and it has *n* rows of keys containing *m* keys in each row. Besides, the keys are of two types. Some of the keys have lowercase Latin letters on them and some of the keys work like the "Shift" key on standard keyboards, that is, they m... | The first line contains three integers *n*, *m*, *x* (1<=≤<=*n*,<=*m*<=≤<=30,<=1<=≤<=*x*<=≤<=50).
Next *n* lines contain descriptions of all the keyboard keys. Each line contains the descriptions of exactly *m* keys, without spaces. The letter keys are marked with the corresponding lowercase letters. The "Shift" keys ... | If Vasya can type the text, then print the minimum number of times he will have to use his other hand. Otherwise, print "-1" (without the quotes). | [
"2 2 1\nab\ncd\n1\nA\n",
"2 2 1\nab\ncd\n1\ne\n",
"2 2 1\nab\ncS\n5\nabcBA\n",
"3 9 4\nqwertyuio\nasdfghjkl\nSzxcvbnmS\n35\nTheQuIcKbRoWnFOXjummsovertHeLazYDOG\n"
] | [
"-1\n",
"-1\n",
"1\n",
"2\n"
] | In the first sample the symbol "A" is impossible to print as there's no "Shift" key on the keyboard.
In the second sample the symbol "e" is impossible to print as there's no such key on the keyboard.
In the fourth sample the symbols "T", "G" are impossible to print with one hand. The other letters that are on the key... | 1,000 | [
{
"input": "2 2 1\nab\ncd\n1\nA",
"output": "-1"
},
{
"input": "2 2 1\nab\ncd\n1\ne",
"output": "-1"
},
{
"input": "2 2 1\nab\ncS\n5\nabcBA",
"output": "1"
},
{
"input": "3 9 4\nqwertyuio\nasdfghjkl\nSzxcvbnmS\n35\nTheQuIcKbRoWnFOXjummsovertHeLazYDOG",
"output": "2"
},
... | 1,580,032,426 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 12 | 124 | 512,000 | import sys
n,m,x=map(int,input().split())
d={}
s=0
cout=0
ans=0
ans1={}
for i in range(n):
arr=input()
for j in range(m):
if arr[j] in d:
d[arr[j]].append([i,j])
else:
d[arr[j]]=[[i,j]]
if arr[j]=='S':
s+=1
q=int(input())
arr1=input()
for i in range(q)... | Title: Keyboard
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya learns to type. He has an unusual keyboard at his disposal: it is rectangular and it has *n* rows of keys containing *m* keys in each row. Besides, the keys are of two types. Some of the keys have lowercase Latin letters on ... | ```python
import sys
n,m,x=map(int,input().split())
d={}
s=0
cout=0
ans=0
ans1={}
for i in range(n):
arr=input()
for j in range(m):
if arr[j] in d:
d[arr[j]].append([i,j])
else:
d[arr[j]]=[[i,j]]
if arr[j]=='S':
s+=1
q=int(input())
arr1=input()
for i i... | 0 |
39 | J | Spelling Check | PROGRAMMING | 1,500 | [
"hashing",
"implementation",
"strings"
] | J. Spelling Check | 2 | 256 | Petya has noticed that when he types using a keyboard, he often presses extra buttons and adds extra letters to the words. Of course, the spell-checking system underlines the words for him and he has to click every word and choose the right variant. Petya got fed up with correcting his mistakes himself, that’s why he d... | The input data contains two strings, consisting of lower-case Latin letters. The length of each string is from 1 to 106 symbols inclusive, the first string contains exactly 1 symbol more than the second one. | In the first line output the number of positions of the symbols in the first string, after the deleting of which the first string becomes identical to the second one. In the second line output space-separated positions of these symbols in increasing order. The positions are numbered starting from 1. If it is impossible... | [
"abdrakadabra\nabrakadabra\n",
"aa\na\n",
"competition\ncodeforces\n"
] | [
"1\n3\n",
"2\n1 2\n",
"0\n"
] | none | 0 | [
{
"input": "abdrakadabra\nabrakadabra",
"output": "1\n3 "
},
{
"input": "aa\na",
"output": "2\n1 2 "
},
{
"input": "competition\ncodeforces",
"output": "0"
},
{
"input": "ab\na",
"output": "1\n2 "
},
{
"input": "bb\nb",
"output": "2\n1 2 "
},
{
"input"... | 1,619,101,433 | 2,147,483,647 | PyPy 3 | TIME_LIMIT_EXCEEDED | TESTS | 15 | 2,000 | 207,052,800 | input_str = input()
mis_str = input()
n = len(input_str)
m = len(mis_str)
mod = 1000000007
k = 311
ans = []
in_pref = [ord(input_str[0])] + [0] * (n - 1)
in_suf = [0] * (n - 1) + [ord(input_str[-1])]
mis_pref = [ord(mis_str[0])] + [0] * (m - 1)
mis_suf = [0] * (m - 1) + [ord(mis_str[-1])]
for i in range(1, n... | Title: Spelling Check
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Petya has noticed that when he types using a keyboard, he often presses extra buttons and adds extra letters to the words. Of course, the spell-checking system underlines the words for him and he has to click every word and ... | ```python
input_str = input()
mis_str = input()
n = len(input_str)
m = len(mis_str)
mod = 1000000007
k = 311
ans = []
in_pref = [ord(input_str[0])] + [0] * (n - 1)
in_suf = [0] * (n - 1) + [ord(input_str[-1])]
mis_pref = [ord(mis_str[0])] + [0] * (m - 1)
mis_suf = [0] * (m - 1) + [ord(mis_str[-1])]
for i in ... | 0 |
868 | B | Race Against Time | PROGRAMMING | 1,400 | [
"implementation"
] | null | null | Have you ever tried to explain to the coordinator, why it is eight hours to the contest and not a single problem has been prepared yet? Misha had. And this time he has a really strong excuse: he faced a space-time paradox! Space and time replaced each other.
The entire universe turned into an enormous clock face with ... | Five integers *h*, *m*, *s*, *t*1, *t*2 (1<=≤<=*h*<=≤<=12, 0<=≤<=*m*,<=*s*<=≤<=59, 1<=≤<=*t*1,<=*t*2<=≤<=12, *t*1<=≠<=*t*2).
Misha's position and the target time do not coincide with the position of any hand. | Print "YES" (quotes for clarity), if Misha can prepare the contest on time, and "NO" otherwise.
You can print each character either upper- or lowercase ("YeS" and "yes" are valid when the answer is "YES"). | [
"12 30 45 3 11\n",
"12 0 1 12 1\n",
"3 47 0 4 9\n"
] | [
"NO\n",
"YES\n",
"YES\n"
] | The three examples are shown on the pictures below from left to right. The starting position of Misha is shown with green, the ending position is shown with pink. Note that the positions of the hands on the pictures are not exact, but are close to the exact and the answer is the same. | 500 | [
{
"input": "12 30 45 3 11",
"output": "NO"
},
{
"input": "12 0 1 12 1",
"output": "YES"
},
{
"input": "3 47 0 4 9",
"output": "YES"
},
{
"input": "10 22 59 6 10",
"output": "YES"
},
{
"input": "3 1 13 12 3",
"output": "NO"
},
{
"input": "11 19 28 9 10"... | 1,509,411,828 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 31 | 0 | h, m, s, t1, t2 = [int(x) for x in input().split(' ')]
m /= 5
s /= 5
iarr = [('h',h%12),('m',m%12),('s',s%12),('t1',t1%12),('t2',t2%12)]
arr = [('t1',t1%12),('t2',t2%12)]
for idx in range(3):
if not (iarr[idx][1] == iarr[-2][1] or iarr[idx][1] == arr[-1][1]):
arr.append(arr[idx])
arr.sort(key=lambda x: ... | Title: Race Against Time
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Have you ever tried to explain to the coordinator, why it is eight hours to the contest and not a single problem has been prepared yet? Misha had. And this time he has a really strong excuse: he faced a space-time par... | ```python
h, m, s, t1, t2 = [int(x) for x in input().split(' ')]
m /= 5
s /= 5
iarr = [('h',h%12),('m',m%12),('s',s%12),('t1',t1%12),('t2',t2%12)]
arr = [('t1',t1%12),('t2',t2%12)]
for idx in range(3):
if not (iarr[idx][1] == iarr[-2][1] or iarr[idx][1] == arr[-1][1]):
arr.append(arr[idx])
arr.sort(key=... | 0 | |
897 | A | Scarborough Fair | PROGRAMMING | 800 | [
"implementation"
] | null | null | Parsley, sage, rosemary and thyme.
Remember me to one who lives there.
He once was the true love of mine.
Willem is taking the girl to the highest building in island No.28, however, neither of them knows how to get there.
Willem asks his friend, Grick for directions, Grick helped them, and gave them a task.
Althou... | The first line contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=100).
The second line contains a string *s* of length *n*, consisting of lowercase English letters.
Each of the next *m* lines contains four parameters *l*,<=*r*,<=*c*1,<=*c*2 (1<=≤<=*l*<=≤<=*r*<=≤<=*n*, *c*1,<=*c*2 are lowercase English letters), ... | Output string *s* after performing *m* operations described above. | [
"3 1\nioi\n1 1 i n\n",
"5 3\nwxhak\n3 3 h x\n1 5 x a\n1 3 w g\n"
] | [
"noi",
"gaaak"
] | For the second example:
After the first operation, the string is wxxak.
After the second operation, the string is waaak.
After the third operation, the string is gaaak. | 500 | [
{
"input": "3 1\nioi\n1 1 i n",
"output": "noi"
},
{
"input": "5 3\nwxhak\n3 3 h x\n1 5 x a\n1 3 w g",
"output": "gaaak"
},
{
"input": "9 51\nbhfbdcgff\n2 3 b b\n2 8 e f\n3 8 g f\n5 7 d a\n1 5 e b\n3 4 g b\n6 7 c d\n3 6 e g\n3 6 e h\n5 6 a e\n7 9 a c\n4 9 a h\n3 7 c b\n6 9 b g\n1 7 h b\n... | 1,572,750,485 | 2,147,483,647 | Python 3 | OK | TESTS | 47 | 124 | 0 | a, d = [int(i) for i in input().split()], input()
for i in range(a[1]):
v = input().split()
d = d[:int(v[0])-1]+d[int(v[0])-1:int(v[1])].replace(v[2], v[3])+d[int(v[1]):]
print(d) | Title: Scarborough Fair
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Parsley, sage, rosemary and thyme.
Remember me to one who lives there.
He once was the true love of mine.
Willem is taking the girl to the highest building in island No.28, however, neither of them knows how to get ... | ```python
a, d = [int(i) for i in input().split()], input()
for i in range(a[1]):
v = input().split()
d = d[:int(v[0])-1]+d[int(v[0])-1:int(v[1])].replace(v[2], v[3])+d[int(v[1]):]
print(d)
``` | 3 | |
553 | A | Kyoya and Colored Balls | PROGRAMMING | 1,500 | [
"combinatorics",
"dp",
"math"
] | null | null | Kyoya Ootori has a bag with *n* colored balls that are colored with *k* different colors. The colors are labeled from 1 to *k*. Balls of the same color are indistinguishable. He draws balls from the bag one by one until the bag is empty. He noticed that he drew the last ball of color *i* before drawing the last ball of... | The first line of input will have one integer *k* (1<=≤<=*k*<=≤<=1000) the number of colors.
Then, *k* lines will follow. The *i*-th line will contain *c**i*, the number of balls of the *i*-th color (1<=≤<=*c**i*<=≤<=1000).
The total number of balls doesn't exceed 1000. | A single integer, the number of ways that Kyoya can draw the balls from the bag as described in the statement, modulo 1<=000<=000<=007. | [
"3\n2\n2\n1\n",
"4\n1\n2\n3\n4\n"
] | [
"3\n",
"1680\n"
] | In the first sample, we have 2 balls of color 1, 2 balls of color 2, and 1 ball of color 3. The three ways for Kyoya are: | 250 | [
{
"input": "3\n2\n2\n1",
"output": "3"
},
{
"input": "4\n1\n2\n3\n4",
"output": "1680"
},
{
"input": "10\n100\n100\n100\n100\n100\n100\n100\n100\n100\n100",
"output": "12520708"
},
{
"input": "5\n10\n10\n10\n10\n10",
"output": "425711769"
},
{
"input": "11\n291\n3... | 1,605,849,531 | 2,147,483,647 | PyPy 3 | OK | TESTS | 27 | 358 | 10,035,200 | from math import factorial
k=int(input())
ans,s=1,0
for i in range(k):
ci=int(input())
ans=(ans*factorial(s+ci-1)//(factorial(ci-1)*factorial(s)))%1000000007
s+=ci
print(ans) | Title: Kyoya and Colored Balls
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Kyoya Ootori has a bag with *n* colored balls that are colored with *k* different colors. The colors are labeled from 1 to *k*. Balls of the same color are indistinguishable. He draws balls from the bag one by o... | ```python
from math import factorial
k=int(input())
ans,s=1,0
for i in range(k):
ci=int(input())
ans=(ans*factorial(s+ci-1)//(factorial(ci-1)*factorial(s)))%1000000007
s+=ci
print(ans)
``` | 3 | |
485 | A | Factory | PROGRAMMING | 1,400 | [
"implementation",
"math",
"matrices"
] | null | null | One industrial factory is reforming working plan. The director suggested to set a mythical detail production norm. If at the beginning of the day there were *x* details in the factory storage, then by the end of the day the factory has to produce (remainder after dividing *x* by *m*) more details. Unfortunately, no cu... | The first line contains two integers *a* and *m* (1<=≤<=*a*,<=*m*<=≤<=105). | Print "Yes" (without quotes) if the production will eventually stop, otherwise print "No". | [
"1 5\n",
"3 6\n"
] | [
"No\n",
"Yes\n"
] | none | 1,000 | [
{
"input": "1 5",
"output": "No"
},
{
"input": "3 6",
"output": "Yes"
},
{
"input": "1 8",
"output": "Yes"
},
{
"input": "2 3",
"output": "No"
},
{
"input": "3 24",
"output": "Yes"
},
{
"input": "1 1",
"output": "Yes"
},
{
"input": "100000 ... | 1,668,369,121 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | n, m = [int(i) for i in input().split()]
conj = set([n])
if n == 0:
print("YES")
else:
current = n
while (True):
current = (current * 2) % m
if current in conj:
print("NO")
break
if current == 0:
print("YES")
break
conj.add(current)
| Title: Factory
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One industrial factory is reforming working plan. The director suggested to set a mythical detail production norm. If at the beginning of the day there were *x* details in the factory storage, then by the end of the day the fac... | ```python
n, m = [int(i) for i in input().split()]
conj = set([n])
if n == 0:
print("YES")
else:
current = n
while (True):
current = (current * 2) % m
if current in conj:
print("NO")
break
if current == 0:
print("YES")
break
conj.add(current)
... | 0 | |
665 | A | Buses Between Cities | PROGRAMMING | 1,600 | [
"implementation"
] | null | null | Buses run between the cities *A* and *B*, the first one is at 05:00 AM and the last one departs not later than at 11:59 PM. A bus from the city *A* departs every *a* minutes and arrives to the city *B* in a *t**a* minutes, and a bus from the city *B* departs every *b* minutes and arrives to the city *A* in a *t**b* min... | The first line contains two integers *a*,<=*t**a* (1<=≤<=*a*,<=*t**a*<=≤<=120) — the frequency of the buses from the city *A* to the city *B* and the travel time. Both values are given in minutes.
The second line contains two integers *b*,<=*t**b* (1<=≤<=*b*,<=*t**b*<=≤<=120) — the frequency of the buses from the city... | Print the only integer *z* — the number of buses Simion will meet on the way. Note that you should not count the encounters in cities *A* and *B*. | [
"10 30\n10 35\n05:20\n",
"60 120\n24 100\n13:00\n"
] | [
"5\n",
"9\n"
] | In the first example Simion departs form the city *A* at 05:20 AM and arrives to the city *B* at 05:50 AM. He will meet the first 5 buses from the city *B* that departed in the period [05:00 AM - 05:40 AM]. Also Simion will meet a bus in the city *B* at 05:50 AM, but he will not count it.
Also note that the first enco... | 0 | [
{
"input": "10 30\n10 35\n05:20",
"output": "5"
},
{
"input": "60 120\n24 100\n13:00",
"output": "9"
},
{
"input": "30 60\n60 60\n22:30",
"output": "2"
},
{
"input": "30 60\n10 60\n23:30",
"output": "8"
},
{
"input": "5 45\n4 60\n21:00",
"output": "26"
},
... | 1,594,276,065 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 2 | 124 | 20,172,800 | #!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Thu Jul 9 10:44:17 2020
@author: shailesh
"""
def time_in_minutes(h,m):
return h*60 + m
def add_time(start_hours,start_mins,addition_minutes):
final_minutes = start_mins + addition_minutes
# print(final_minutes)
end_hours= start_hours + fin... | Title: Buses Between Cities
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Buses run between the cities *A* and *B*, the first one is at 05:00 AM and the last one departs not later than at 11:59 PM. A bus from the city *A* departs every *a* minutes and arrives to the city *B* in a *t**a* ... | ```python
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Thu Jul 9 10:44:17 2020
@author: shailesh
"""
def time_in_minutes(h,m):
return h*60 + m
def add_time(start_hours,start_mins,addition_minutes):
final_minutes = start_mins + addition_minutes
# print(final_minutes)
end_hours= start_h... | 0 | |
385 | A | Bear and Raspberry | PROGRAMMING | 1,000 | [
"brute force",
"greedy",
"implementation"
] | null | null | The bear decided to store some raspberry for the winter. He cunningly found out the price for a barrel of honey in kilos of raspberry for each of the following *n* days. According to the bear's data, on the *i*-th (1<=≤<=*i*<=≤<=*n*) day, the price for one barrel of honey is going to is *x**i* kilos of raspberry.
Unfo... | The first line contains two space-separated integers, *n* and *c* (2<=≤<=*n*<=≤<=100,<=0<=≤<=*c*<=≤<=100), — the number of days and the number of kilos of raspberry that the bear should give for borrowing the barrel.
The second line contains *n* space-separated integers *x*1,<=*x*2,<=...,<=*x**n* (0<=≤<=*x**i*<=≤<=100... | Print a single integer — the answer to the problem. | [
"5 1\n5 10 7 3 20\n",
"6 2\n100 1 10 40 10 40\n",
"3 0\n1 2 3\n"
] | [
"3\n",
"97\n",
"0\n"
] | In the first sample the bear will lend a honey barrel at day 3 and then sell it for 7. Then the bear will buy a barrel for 3 and return it to the friend. So, the profit is (7 - 3 - 1) = 3.
In the second sample bear will lend a honey barrel at day 1 and then sell it for 100. Then the bear buy the barrel for 1 at the da... | 500 | [
{
"input": "5 1\n5 10 7 3 20",
"output": "3"
},
{
"input": "6 2\n100 1 10 40 10 40",
"output": "97"
},
{
"input": "3 0\n1 2 3",
"output": "0"
},
{
"input": "2 0\n2 1",
"output": "1"
},
{
"input": "10 5\n10 1 11 2 12 3 13 4 14 5",
"output": "4"
},
{
"in... | 1,531,864,964 | 2,147,483,647 | Python 3 | OK | TESTS | 32 | 109 | 0 | days, kilos = map(int, input().split())
prices = list(map(int, input().split()))
profit = 0
for i in range(days-1):
profit = max(profit, prices[i] - prices[i+1] - kilos)
print(profit)
| Title: Bear and Raspberry
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The bear decided to store some raspberry for the winter. He cunningly found out the price for a barrel of honey in kilos of raspberry for each of the following *n* days. According to the bear's data, on the *i*-th (1... | ```python
days, kilos = map(int, input().split())
prices = list(map(int, input().split()))
profit = 0
for i in range(days-1):
profit = max(profit, prices[i] - prices[i+1] - kilos)
print(profit)
``` | 3 | |
151 | A | Soft Drinking | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | This winter is so cold in Nvodsk! A group of *n* friends decided to buy *k* bottles of a soft drink called "Take-It-Light" to warm up a bit. Each bottle has *l* milliliters of the drink. Also they bought *c* limes and cut each of them into *d* slices. After that they found *p* grams of salt.
To make a toast, each frie... | The first and only line contains positive integers *n*, *k*, *l*, *c*, *d*, *p*, *nl*, *np*, not exceeding 1000 and no less than 1. The numbers are separated by exactly one space. | Print a single integer — the number of toasts each friend can make. | [
"3 4 5 10 8 100 3 1\n",
"5 100 10 1 19 90 4 3\n",
"10 1000 1000 25 23 1 50 1\n"
] | [
"2\n",
"3\n",
"0\n"
] | A comment to the first sample:
Overall the friends have 4 * 5 = 20 milliliters of the drink, it is enough to make 20 / 3 = 6 toasts. The limes are enough for 10 * 8 = 80 toasts and the salt is enough for 100 / 1 = 100 toasts. However, there are 3 friends in the group, so the answer is *min*(6, 80, 100) / 3 = 2. | 500 | [
{
"input": "3 4 5 10 8 100 3 1",
"output": "2"
},
{
"input": "5 100 10 1 19 90 4 3",
"output": "3"
},
{
"input": "10 1000 1000 25 23 1 50 1",
"output": "0"
},
{
"input": "1 7 4 5 5 8 3 2",
"output": "4"
},
{
"input": "2 3 3 5 5 10 1 3",
"output": "1"
},
{
... | 1,677,981,303 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 9 | 154 | 0 |
gradients = list(map(int, input().split()))
n,k,l,c,d,p,nl,np = gradients
liters = k*l
toasts = liters//n
slices = d*c
salt_grams = p//np
availabe_toasts = min(toasts,slices,salt_grams)
print(availabe_toasts//n) | Title: Soft Drinking
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
This winter is so cold in Nvodsk! A group of *n* friends decided to buy *k* bottles of a soft drink called "Take-It-Light" to warm up a bit. Each bottle has *l* milliliters of the drink. Also they bought *c* limes and cut... | ```python
gradients = list(map(int, input().split()))
n,k,l,c,d,p,nl,np = gradients
liters = k*l
toasts = liters//n
slices = d*c
salt_grams = p//np
availabe_toasts = min(toasts,slices,salt_grams)
print(availabe_toasts//n)
``` | 0 | |
630 | A | Again Twenty Five! | PROGRAMMING | 800 | [
"number theory"
] | null | null | The HR manager was disappointed again. The last applicant failed the interview the same way as 24 previous ones. "Do I give such a hard task?" — the HR manager thought. "Just raise number 5 to the power of *n* and get last two digits of the number. Yes, of course, *n* can be rather big, and one cannot find the power us... | The only line of the input contains a single integer *n* (2<=≤<=*n*<=≤<=2·1018) — the power in which you need to raise number 5. | Output the last two digits of 5*n* without spaces between them. | [
"2\n"
] | [
"25"
] | none | 0 | [
{
"input": "2",
"output": "25"
},
{
"input": "7",
"output": "25"
},
{
"input": "1000000000000000000",
"output": "25"
},
{
"input": "2000000000000000000",
"output": "25"
},
{
"input": "987654321012345678",
"output": "25"
}
] | 1,693,137,576 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 2 | 500 | 5,222,400 | i = int(input())
x = 5**i
l = str(x)
print(l[-2:])
| Title: Again Twenty Five!
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The HR manager was disappointed again. The last applicant failed the interview the same way as 24 previous ones. "Do I give such a hard task?" — the HR manager thought. "Just raise number 5 to the power of *n* and ge... | ```python
i = int(input())
x = 5**i
l = str(x)
print(l[-2:])
``` | 0 | |
719 | B | Anatoly and Cockroaches | PROGRAMMING | 1,400 | [
"greedy"
] | null | null | Anatoly lives in the university dorm as many other students do. As you know, cockroaches are also living there together with students. Cockroaches might be of two colors: black and red. There are *n* cockroaches living in Anatoly's room.
Anatoly just made all his cockroaches to form a single line. As he is a perfectio... | The first line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=100<=000) — the number of cockroaches.
The second line contains a string of length *n*, consisting of characters 'b' and 'r' that denote black cockroach and red cockroach respectively. | Print one integer — the minimum number of moves Anatoly has to perform in order to make the colors of cockroaches in the line to alternate. | [
"5\nrbbrr\n",
"5\nbbbbb\n",
"3\nrbr\n"
] | [
"1\n",
"2\n",
"0\n"
] | In the first sample, Anatoly has to swap third and fourth cockroaches. He needs 1 turn to do this.
In the second sample, the optimum answer is to paint the second and the fourth cockroaches red. This requires 2 turns.
In the third sample, the colors of cockroaches in the line are alternating already, thus the answer ... | 1,000 | [
{
"input": "5\nrbbrr",
"output": "1"
},
{
"input": "5\nbbbbb",
"output": "2"
},
{
"input": "3\nrbr",
"output": "0"
},
{
"input": "13\nrbbbrbrrbrrbb",
"output": "3"
},
{
"input": "18\nrrrrrrrrrrrrrrrrrb",
"output": "8"
},
{
"input": "100\nbrbbbrrrbbrbrb... | 1,586,969,280 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 124 | 409,600 | from collections import Counter,defaultdict,deque
#alph = 'abcdefghijklmnopqrstuvwxyz'
#from math import factorial as fact
#import math
#tt = 1#int(input())
#total=0
#n = int(input())
#n,m,k = [int(x) for x in input().split()]
#n = int(input())
#n,m = [int(x) for x in input().split()]
n = int(input())
... | Title: Anatoly and Cockroaches
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Anatoly lives in the university dorm as many other students do. As you know, cockroaches are also living there together with students. Cockroaches might be of two colors: black and red. There are *n* cockroaches... | ```python
from collections import Counter,defaultdict,deque
#alph = 'abcdefghijklmnopqrstuvwxyz'
#from math import factorial as fact
#import math
#tt = 1#int(input())
#total=0
#n = int(input())
#n,m,k = [int(x) for x in input().split()]
#n = int(input())
#n,m = [int(x) for x in input().split()]
n = int(... | 0 | |
865 | B | Ordering Pizza | PROGRAMMING | 1,900 | [
"binary search",
"sortings",
"ternary search"
] | null | null | It's another Start[c]up finals, and that means there is pizza to order for the onsite contestants. There are only 2 types of pizza (obviously not, but let's just pretend for the sake of the problem), and all pizzas contain exactly *S* slices.
It is known that the *i*-th contestant will eat *s**i* slices of pizza, and ... | The first line of input will contain integers *N* and *S* (1<=≤<=*N*<=≤<=105,<=1<=≤<=*S*<=≤<=105), the number of contestants and the number of slices per pizza, respectively. *N* lines follow.
The *i*-th such line contains integers *s**i*, *a**i*, and *b**i* (1<=≤<=*s**i*<=≤<=105,<=1<=≤<=*a**i*<=≤<=105,<=1<=≤<=*b**i*<... | Print the maximum total happiness that can be achieved. | [
"3 12\n3 5 7\n4 6 7\n5 9 5\n",
"6 10\n7 4 7\n5 8 8\n12 5 8\n6 11 6\n3 3 7\n5 9 6\n"
] | [
"84\n",
"314\n"
] | In the first example, you only need to buy one pizza. If you buy a type 1 pizza, the total happiness will be 3·5 + 4·6 + 5·9 = 84, and if you buy a type 2 pizza, the total happiness will be 3·7 + 4·7 + 5·5 = 74. | 1,000 | [
{
"input": "3 12\n3 5 7\n4 6 7\n5 9 5",
"output": "84"
},
{
"input": "6 10\n7 4 7\n5 8 8\n12 5 8\n6 11 6\n3 3 7\n5 9 6",
"output": "314"
},
{
"input": "1 100\n97065 97644 98402",
"output": "9551390130"
},
{
"input": "1 100000\n1 82372 5587",
"output": "82372"
},
{
... | 1,507,208,856 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 46 | 0 | a, b = input().split(' ')
st1=0
st2=0
m1=0
m2=0
s=0
for i in range(int(a)):
n, n1, n2 = input().split(' ')
st1 +=int(n)*int(n1)
st2 +=int(n)*int(n2)
s +=int(n)
if m1<=int(n1):
m1=int(n1)
if m2<=int(n2):
m2=int(n2)
if int(s)%int(b)==0:
ex=0
else:
ex=int(a)*int(b)
st... | Title: Ordering Pizza
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
It's another Start[c]up finals, and that means there is pizza to order for the onsite contestants. There are only 2 types of pizza (obviously not, but let's just pretend for the sake of the problem), and all pizzas conta... | ```python
a, b = input().split(' ')
st1=0
st2=0
m1=0
m2=0
s=0
for i in range(int(a)):
n, n1, n2 = input().split(' ')
st1 +=int(n)*int(n1)
st2 +=int(n)*int(n2)
s +=int(n)
if m1<=int(n1):
m1=int(n1)
if m2<=int(n2):
m2=int(n2)
if int(s)%int(b)==0:
ex=0
else:
ex=int(a)*int(... | 0 | |
3 | C | Tic-tac-toe | PROGRAMMING | 1,800 | [
"brute force",
"games",
"implementation"
] | C. Tic-tac-toe | 1 | 64 | Certainly, everyone is familiar with tic-tac-toe game. The rules are very simple indeed. Two players take turns marking the cells in a 3<=×<=3 grid (one player always draws crosses, the other — noughts). The player who succeeds first in placing three of his marks in a horizontal, vertical or diagonal line wins, and the... | The input consists of three lines, each of the lines contains characters ".", "X" or "0" (a period, a capital letter X, or a digit zero). | Print one of the six verdicts: first, second, illegal, the first player won, the second player won or draw. | [
"X0X\n.0.\n.X.\n"
] | [
"second\n"
] | none | 0 | [
{
"input": "X0X\n.0.\n.X.",
"output": "second"
},
{
"input": "0.X\nXX.\n000",
"output": "illegal"
},
{
"input": "XXX\n.0.\n000",
"output": "illegal"
},
{
"input": "XXX\n...\n000",
"output": "illegal"
},
{
"input": "X.X\nX..\n00.",
"output": "second"
},
{
... | 1,657,719,216 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 62 | 0 | def three(pos):
a = grid[pos[0][1]][pos[0][0]]
b = grid[pos[1][1]][pos[1][0]]
c = grid[pos[2][1]][pos[2][0]]
if a==b==c:
if a!='.':
return a
return 0
grid = []
count = {'.':0,'X':0,'0':0}
for _ in range(3):
grid.append([])
s = input().strip()
for c in s:
... | Title: Tic-tac-toe
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
Certainly, everyone is familiar with tic-tac-toe game. The rules are very simple indeed. Two players take turns marking the cells in a 3<=×<=3 grid (one player always draws crosses, the other — noughts). The player who succeeds ... | ```python
def three(pos):
a = grid[pos[0][1]][pos[0][0]]
b = grid[pos[1][1]][pos[1][0]]
c = grid[pos[2][1]][pos[2][0]]
if a==b==c:
if a!='.':
return a
return 0
grid = []
count = {'.':0,'X':0,'0':0}
for _ in range(3):
grid.append([])
s = input().strip()
fo... | 0 |
248 | A | Cupboards | PROGRAMMING | 800 | [
"implementation"
] | null | null | One foggy Stockholm morning, Karlsson decided to snack on some jam in his friend Lillebror Svantenson's house. Fortunately for Karlsson, there wasn't anybody in his friend's house. Karlsson was not going to be hungry any longer, so he decided to get some food in the house.
Karlsson's gaze immediately fell on *n* woode... | The first input line contains a single integer *n* — the number of cupboards in the kitchen (2<=≤<=*n*<=≤<=104). Then follow *n* lines, each containing two integers *l**i* and *r**i* (0<=≤<=*l**i*,<=*r**i*<=≤<=1). Number *l**i* equals one, if the left door of the *i*-th cupboard is opened, otherwise number *l**i* equal... | In the only output line print a single integer *t* — the minimum number of seconds Karlsson needs to change the doors of all cupboards to the position he needs. | [
"5\n0 1\n1 0\n0 1\n1 1\n0 1\n"
] | [
"3\n"
] | none | 500 | [
{
"input": "5\n0 1\n1 0\n0 1\n1 1\n0 1",
"output": "3"
},
{
"input": "2\n0 0\n0 0",
"output": "0"
},
{
"input": "3\n0 1\n1 1\n1 1",
"output": "1"
},
{
"input": "8\n0 1\n1 0\n0 1\n1 1\n0 1\n1 0\n0 1\n1 0",
"output": "7"
},
{
"input": "8\n1 0\n1 0\n1 0\n0 1\n0 1\n1 ... | 1,688,661,611 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 57 | 342 | 3,993,600 | leftsum=0
rightsum=0
out=0
n=int(input())
for _ in range(n):
l,r=map(int,input().split())
leftsum+=l
rightsum+=r
if leftsum<n/2:
out+=leftsum
else:
out+=(n-leftsum)
if rightsum<n/2:
out+=rightsum
else:
out+=(n-rightsum)
print(out) | Title: Cupboards
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One foggy Stockholm morning, Karlsson decided to snack on some jam in his friend Lillebror Svantenson's house. Fortunately for Karlsson, there wasn't anybody in his friend's house. Karlsson was not going to be hungry any long... | ```python
leftsum=0
rightsum=0
out=0
n=int(input())
for _ in range(n):
l,r=map(int,input().split())
leftsum+=l
rightsum+=r
if leftsum<n/2:
out+=leftsum
else:
out+=(n-leftsum)
if rightsum<n/2:
out+=rightsum
else:
out+=(n-rightsum)
print(out)
``` | 3 | |
96 | A | Football | PROGRAMMING | 900 | [
"implementation",
"strings"
] | A. Football | 2 | 256 | Petya loves football very much. One day, as he was watching a football match, he was writing the players' current positions on a piece of paper. To simplify the situation he depicted it as a string consisting of zeroes and ones. A zero corresponds to players of one team; a one corresponds to players of another team. If... | The first input line contains a non-empty string consisting of characters "0" and "1", which represents players. The length of the string does not exceed 100 characters. There's at least one player from each team present on the field. | Print "YES" if the situation is dangerous. Otherwise, print "NO". | [
"001001\n",
"1000000001\n"
] | [
"NO\n",
"YES\n"
] | none | 500 | [
{
"input": "001001",
"output": "NO"
},
{
"input": "1000000001",
"output": "YES"
},
{
"input": "00100110111111101",
"output": "YES"
},
{
"input": "11110111111111111",
"output": "YES"
},
{
"input": "01",
"output": "NO"
},
{
"input": "10100101",
"outp... | 1,689,092,792 | 2,147,483,647 | Python 3 | OK | TESTS | 44 | 92 | 0 | string=input()
l=len(string)
c=0
p=0
for i in range(0,l-1):
if(string[i]==string[i+1]):
c=c+1
if (c>=6):
p=1
else:
c=0
if (p==1):
print("YES")
else :
print("NO") | 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=input()
l=len(string)
c=0
p=0
for i in range(0,l-1):
if(string[i]==string[i+1]):
c=c+1
if (c>=6):
p=1
else:
c=0
if (p==1):
print("YES")
else :
print("NO")
``` | 3.977 |
746 | A | Compote | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | Nikolay has *a* lemons, *b* apples and *c* pears. He decided to cook a compote. According to the recipe the fruits should be in the ratio 1:<=2:<=4. It means that for each lemon in the compote should be exactly 2 apples and exactly 4 pears. You can't crumble up, break up or cut these fruits into pieces. These fruits — ... | The first line contains the positive integer *a* (1<=≤<=*a*<=≤<=1000) — the number of lemons Nikolay has.
The second line contains the positive integer *b* (1<=≤<=*b*<=≤<=1000) — the number of apples Nikolay has.
The third line contains the positive integer *c* (1<=≤<=*c*<=≤<=1000) — the number of pears Nikolay has... | Print the maximum total number of lemons, apples and pears from which Nikolay can cook the compote. | [
"2\n5\n7\n",
"4\n7\n13\n",
"2\n3\n2\n"
] | [
"7\n",
"21\n",
"0\n"
] | In the first example Nikolay can use 1 lemon, 2 apples and 4 pears, so the answer is 1 + 2 + 4 = 7.
In the second example Nikolay can use 3 lemons, 6 apples and 12 pears, so the answer is 3 + 6 + 12 = 21.
In the third example Nikolay don't have enough pears to cook any compote, so the answer is 0. | 500 | [
{
"input": "2\n5\n7",
"output": "7"
},
{
"input": "4\n7\n13",
"output": "21"
},
{
"input": "2\n3\n2",
"output": "0"
},
{
"input": "1\n1\n1",
"output": "0"
},
{
"input": "1\n2\n4",
"output": "7"
},
{
"input": "1000\n1000\n1000",
"output": "1750"
}... | 1,695,405,091 | 2,147,483,647 | Python 3 | OK | TESTS | 84 | 46 | 0 | a = int(input())
b = int(input())
c = int(input())
if a < 1 or b < 2 or c < 4:
print(0)
else:
if a * 2 <= b and a * 4 <= c:
print(a+a*2+a*4)
else:
m = min(a//1,b//2,c//4)
print(m*1+m*2+m*4) | Title: Compote
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Nikolay has *a* lemons, *b* apples and *c* pears. He decided to cook a compote. According to the recipe the fruits should be in the ratio 1:<=2:<=4. It means that for each lemon in the compote should be exactly 2 apples and exa... | ```python
a = int(input())
b = int(input())
c = int(input())
if a < 1 or b < 2 or c < 4:
print(0)
else:
if a * 2 <= b and a * 4 <= c:
print(a+a*2+a*4)
else:
m = min(a//1,b//2,c//4)
print(m*1+m*2+m*4)
``` | 3 | |
922 | C | Cave Painting | PROGRAMMING | 1,600 | [
"brute force",
"number theory"
] | null | null | Imp is watching a documentary about cave painting.
Some numbers, carved in chaotic order, immediately attracted his attention. Imp rapidly proposed a guess that they are the remainders of division of a number *n* by all integers *i* from 1 to *k*. Unfortunately, there are too many integers to analyze for Imp.
Imp wan... | The only line contains two integers *n*, *k* (1<=≤<=*n*,<=*k*<=≤<=1018). | Print "Yes", if all the remainders are distinct, and "No" otherwise.
You can print each letter in arbitrary case (lower or upper). | [
"4 4\n",
"5 3\n"
] | [
"No\n",
"Yes\n"
] | In the first sample remainders modulo 1 and 4 coincide. | 1,250 | [
{
"input": "4 4",
"output": "No"
},
{
"input": "5 3",
"output": "Yes"
},
{
"input": "1 1",
"output": "Yes"
},
{
"input": "744 18",
"output": "No"
},
{
"input": "47879 10",
"output": "Yes"
},
{
"input": "1000000000000000000 1000000000000000000",
"ou... | 1,608,919,806 | 2,147,483,647 | PyPy 3 | TIME_LIMIT_EXCEEDED | TESTS | 6 | 1,000 | 1,331,200 | def prime(n,k):
l = set()
if (n%2==0):
l.add(2)
while(n%2==0):
n//=2
i = 3
while(i*i<=n):
if (n%i==0):
l.add(i)
l.add(n//i)
while(n%i==0):
n//=i
i+=2
if (n>2):
l.add(n)
if (1 in l):
... | Title: Cave Painting
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Imp is watching a documentary about cave painting.
Some numbers, carved in chaotic order, immediately attracted his attention. Imp rapidly proposed a guess that they are the remainders of division of a number *n* by all ... | ```python
def prime(n,k):
l = set()
if (n%2==0):
l.add(2)
while(n%2==0):
n//=2
i = 3
while(i*i<=n):
if (n%i==0):
l.add(i)
l.add(n//i)
while(n%i==0):
n//=i
i+=2
if (n>2):
l.add(n)
if (1 i... | 0 | |
743 | B | Chloe and the sequence | PROGRAMMING | 1,200 | [
"binary search",
"bitmasks",
"constructive algorithms",
"implementation"
] | null | null | Chloe, the same as Vladik, is a competitive programmer. She didn't have any problems to get to the olympiad like Vladik, but she was confused by the task proposed on the olympiad.
Let's consider the following algorithm of generating a sequence of integers. Initially we have a sequence consisting of a single element eq... | The only line contains two integers *n* and *k* (1<=≤<=*n*<=≤<=50, 1<=≤<=*k*<=≤<=2*n*<=-<=1). | Print single integer — the integer at the *k*-th position in the obtained sequence. | [
"3 2\n",
"4 8\n"
] | [
"2",
"4"
] | In the first sample the obtained sequence is [1, 2, 1, 3, 1, 2, 1]. The number on the second position is 2.
In the second sample the obtained sequence is [1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1]. The number on the eighth position is 4. | 1,000 | [
{
"input": "3 2",
"output": "2"
},
{
"input": "4 8",
"output": "4"
},
{
"input": "5 27",
"output": "1"
},
{
"input": "7 44",
"output": "3"
},
{
"input": "15 18432",
"output": "12"
},
{
"input": "20 259676",
"output": "3"
},
{
"input": "30 6... | 1,603,428,427 | 2,147,483,647 | PyPy 3 | OK | TESTS | 39 | 155 | 0 |
def solve(n,k) :
#print(n,k)
if n==1 and k==1 :
return 1
l = 2**n - 1
mid = l//2 + 1
if k==mid :
return n
if k<mid :
return solve(n-1,k)
else :
return solve(n-1,k-(2**(n-1)))
n,k... | Title: Chloe and the sequence
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Chloe, the same as Vladik, is a competitive programmer. She didn't have any problems to get to the olympiad like Vladik, but she was confused by the task proposed on the olympiad.
Let's consider the following a... | ```python
def solve(n,k) :
#print(n,k)
if n==1 and k==1 :
return 1
l = 2**n - 1
mid = l//2 + 1
if k==mid :
return n
if k<mid :
return solve(n-1,k)
else :
return solve(n-1,k-(2**(n-1)))
... | 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"... | 1,481,253,810 | 2,147,483,647 | PyPy 3 | OK | TESTS | 32 | 218 | 0 | n=int(input())
line=[int(j)for j in input().split()]
even=[]
odd=[]
for i in range(n):
if line[i]%2 == 0:
even+=[line[i]]
else:
odd+=[line[i]]
if len(even)>len(odd):
for i in range(n):
if line[i]%2 != 0:
print(i+1)
break
else:
for i in range... | 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())
line=[int(j)for j in input().split()]
even=[]
odd=[]
for i in range(n):
if line[i]%2 == 0:
even+=[line[i]]
else:
odd+=[line[i]]
if len(even)>len(odd):
for i in range(n):
if line[i]%2 != 0:
print(i+1)
break
else:
for ... | 3.9455 |
841 | A | Generous Kefa | PROGRAMMING | 900 | [
"brute force",
"implementation"
] | null | null | One day Kefa found *n* baloons. For convenience, we denote color of *i*-th baloon as *s**i* — lowercase letter of the Latin alphabet. Also Kefa has *k* friends. Friend will be upset, If he get two baloons of the same color. Kefa want to give out all baloons to his friends. Help Kefa to find out, can he give out all his... | The first line contains two integers *n* and *k* (1<=≤<=*n*,<=*k*<=≤<=100) — the number of baloons and friends.
Next line contains string *s* — colors of baloons. | Answer to the task — «YES» or «NO» in a single line.
You can choose the case (lower or upper) for each letter arbitrary. | [
"4 2\naabb\n",
"6 3\naacaab\n"
] | [
"YES\n",
"NO\n"
] | In the first sample Kefa can give 1-st and 3-rd baloon to the first friend, and 2-nd and 4-th to the second.
In the second sample Kefa needs to give to all his friends baloons of color a, but one baloon will stay, thats why answer is «NO». | 500 | [
{
"input": "4 2\naabb",
"output": "YES"
},
{
"input": "6 3\naacaab",
"output": "NO"
},
{
"input": "2 2\nlu",
"output": "YES"
},
{
"input": "5 3\novvoo",
"output": "YES"
},
{
"input": "36 13\nbzbzcffczzcbcbzzfzbbfzfzzbfbbcbfccbf",
"output": "YES"
},
{
"... | 1,671,037,564 | 2,147,483,647 | Python 3 | OK | TESTS | 114 | 46 | 0 | a=[0]*28
n,k=map(int,input().split())
s=str(input())
for i in s:
a[ord(i)-ord('a')]+=1
if max(a)<=k:
print('YES')
else:
print('NO')
| Title: Generous Kefa
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day Kefa found *n* baloons. For convenience, we denote color of *i*-th baloon as *s**i* — lowercase letter of the Latin alphabet. Also Kefa has *k* friends. Friend will be upset, If he get two baloons of the same colo... | ```python
a=[0]*28
n,k=map(int,input().split())
s=str(input())
for i in s:
a[ord(i)-ord('a')]+=1
if max(a)<=k:
print('YES')
else:
print('NO')
``` | 3 | |
579 | A | Raising Bacteria | PROGRAMMING | 1,000 | [
"bitmasks"
] | null | null | You are a lover of bacteria. You want to raise some bacteria in a box.
Initially, the box is empty. Each morning, you can put any number of bacteria into the box. And each night, every bacterium in the box will split into two bacteria. You hope to see exactly *x* bacteria in the box at some moment.
What is the mini... | The only line containing one integer *x* (1<=≤<=*x*<=≤<=109). | The only line containing one integer: the answer. | [
"5\n",
"8\n"
] | [
"2\n",
"1\n"
] | For the first sample, we can add one bacterium in the box in the first day morning and at the third morning there will be 4 bacteria in the box. Now we put one more resulting 5 in the box. We added 2 bacteria in the process so the answer is 2.
For the second sample, we can put one in the first morning and in the 4-th ... | 250 | [
{
"input": "5",
"output": "2"
},
{
"input": "8",
"output": "1"
},
{
"input": "536870911",
"output": "29"
},
{
"input": "1",
"output": "1"
},
{
"input": "343000816",
"output": "14"
},
{
"input": "559980448",
"output": "12"
},
{
"input": "697... | 1,661,777,906 | 2,147,483,647 | Python 3 | OK | TESTS | 36 | 46 | 0 | n=int(input())
count=0
while(n):
count+=1
n=n-(n & (-n))
print(count) | Title: Raising Bacteria
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are a lover of bacteria. You want to raise some bacteria in a box.
Initially, the box is empty. Each morning, you can put any number of bacteria into the box. And each night, every bacterium in the box will split... | ```python
n=int(input())
count=0
while(n):
count+=1
n=n-(n & (-n))
print(count)
``` | 3 | |
478 | A | Initial Bet | PROGRAMMING | 1,100 | [
"implementation"
] | null | null | There are five people playing a game called "Generosity". Each person gives some non-zero number of coins *b* as an initial bet. After all players make their bets of *b* coins, the following operation is repeated for several times: a coin is passed from one player to some other player.
Your task is to write a program ... | The input consists of a single line containing five integers *c*1,<=*c*2,<=*c*3,<=*c*4 and *c*5 — the number of coins that the first, second, third, fourth and fifth players respectively have at the end of the game (0<=≤<=*c*1,<=*c*2,<=*c*3,<=*c*4,<=*c*5<=≤<=100). | Print the only line containing a single positive integer *b* — the number of coins in the initial bet of each player. If there is no such value of *b*, then print the only value "-1" (quotes for clarity). | [
"2 5 4 0 4\n",
"4 5 9 2 1\n"
] | [
"3\n",
"-1\n"
] | In the first sample the following sequence of operations is possible:
1. One coin is passed from the fourth player to the second player; 1. One coin is passed from the fourth player to the fifth player; 1. One coin is passed from the first player to the third player; 1. One coin is passed from the fourth player to... | 500 | [
{
"input": "2 5 4 0 4",
"output": "3"
},
{
"input": "4 5 9 2 1",
"output": "-1"
},
{
"input": "0 0 0 0 0",
"output": "-1"
},
{
"input": "1 2 1 2 3",
"output": "-1"
},
{
"input": "100 0 0 0 0",
"output": "20"
},
{
"input": "2 3 4 5 6",
"output": "4"... | 1,695,035,676 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 31 | 0 | c = [int(i) for i in input().split()]
sum_c = sum(c)
print(-1 if sum_c % 5 else sum_c // 5)
| Title: Initial Bet
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There are five people playing a game called "Generosity". Each person gives some non-zero number of coins *b* as an initial bet. After all players make their bets of *b* coins, the following operation is repeated for severa... | ```python
c = [int(i) for i in input().split()]
sum_c = sum(c)
print(-1 if sum_c % 5 else sum_c // 5)
``` | 0 | |
1,000 | B | Light It Up | PROGRAMMING | 1,500 | [
"greedy"
] | null | null | Recently, you bought a brand new smart lamp with programming features. At first, you set up a schedule to the lamp. Every day it will turn power on at moment $0$ and turn power off at moment $M$. Moreover, the lamp allows you to set a program of switching its state (states are "lights on" and "lights off"). Unfortunate... | First line contains two space separated integers $n$ and $M$ ($1 \le n \le 10^5$, $2 \le M \le 10^9$) — the length of program $a$ and the moment when power turns off.
Second line contains $n$ space separated integers $a_1, a_2, \dots, a_n$ ($0 < a_1 < a_2 < \dots < a_n < M$) — initially installed progra... | Print the only integer — maximum possible total time when the lamp is lit. | [
"3 10\n4 6 7\n",
"2 12\n1 10\n",
"2 7\n3 4\n"
] | [
"8\n",
"9\n",
"6\n"
] | In the first example, one of possible optimal solutions is to insert value $x = 3$ before $a_1$, so program will be $[3, 4, 6, 7]$ and time of lamp being lit equals $(3 - 0) + (6 - 4) + (10 - 7) = 8$. Other possible solution is to insert $x = 5$ in appropriate place.
In the second example, there is only one optimal so... | 0 | [
{
"input": "3 10\n4 6 7",
"output": "8"
},
{
"input": "2 12\n1 10",
"output": "9"
},
{
"input": "2 7\n3 4",
"output": "6"
},
{
"input": "1 2\n1",
"output": "1"
},
{
"input": "5 10\n1 3 5 6 8",
"output": "6"
},
{
"input": "7 1000000000\n1 10001 10011 20... | 1,666,964,622 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 39 | 93 | 18,841,600 | n,m = [int(x) for x in input().split()]
a = [0]+[int(x) for x in input().split()]+[m]
#light black light black
light = [0]
for i in range(1,n+2):
if i%2 == 0:
light.append(light[-1])
else:
light.append(light[-1]+a[i]-a[i-1])
maxn = light[-1]
for i in range(1,n+2):#在第i-1个区间（i个开关前）增加开关
... | Title: Light It Up
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Recently, you bought a brand new smart lamp with programming features. At first, you set up a schedule to the lamp. Every day it will turn power on at moment $0$ and turn power off at moment $M$. Moreover, the lamp allows y... | ```python
n,m = [int(x) for x in input().split()]
a = [0]+[int(x) for x in input().split()]+[m]
#light black light black
light = [0]
for i in range(1,n+2):
if i%2 == 0:
light.append(light[-1])
else:
light.append(light[-1]+a[i]-a[i-1])
maxn = light[-1]
for i in range(1,n+2):#在第i-1个区间（i个... | 3 | |
456 | B | Fedya and Maths | PROGRAMMING | 1,200 | [
"math",
"number theory"
] | null | null | Fedya studies in a gymnasium. Fedya's maths hometask is to calculate the following expression:
for given value of *n*. Fedya managed to complete the task. Can you? Note that given number *n* can be extremely large (e.g. it can exceed any integer type of your programming language). | The single line contains a single integer *n* (0<=≤<=*n*<=≤<=10105). The number doesn't contain any leading zeroes. | Print the value of the expression without leading zeros. | [
"4\n",
"124356983594583453458888889\n"
] | [
"4\n",
"0\n"
] | Operation *x* *mod* *y* means taking remainder after division *x* by *y*.
Note to the first sample:
<img align="middle" class="tex-formula" src="https://espresso.codeforces.com/825f244180bb10323db01645118c3cfdb312fa89.png" style="max-width: 100.0%;max-height: 100.0%;"/> | 1,000 | [
{
"input": "4",
"output": "4"
},
{
"input": "124356983594583453458888889",
"output": "0"
},
{
"input": "2",
"output": "0"
},
{
"input": "7854",
"output": "0"
},
{
"input": "584660",
"output": "4"
},
{
"input": "464",
"output": "4"
},
{
"inp... | 1,680,782,649 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | n = int(input())
rem = n % 4
if(rem == 1):
print("4")
else:
print("0")
| Title: Fedya and Maths
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Fedya studies in a gymnasium. Fedya's maths hometask is to calculate the following expression:
for given value of *n*. Fedya managed to complete the task. Can you? Note that given number *n* can be extremely large (e.g... | ```python
n = int(input())
rem = n % 4
if(rem == 1):
print("4")
else:
print("0")
``` | 0 | |
461 | C | Appleman and a Sheet of Paper | PROGRAMMING | 2,200 | [
"data structures",
"implementation"
] | null | null | Appleman has a very big sheet of paper. This sheet has a form of rectangle with dimensions 1<=×<=*n*. Your task is help Appleman with folding of such a sheet. Actually, you need to perform *q* queries. Each query will have one of the following types:
1. Fold the sheet of paper at position *p**i*. After this query the... | The first line contains two integers: *n* and *q* (1<=<=≤<=*n*<=≤<=105; 1<=≤<=*q*<=≤<=105) — the width of the paper and the number of queries.
Each of the following *q* lines contains one of the described queries in the following format:
- "1 *p**i*" (1<=≤<=*p**i*<=<<=[*current* *width* *of* *sheet*]) — the first... | For each query of the second type, output the answer. | [
"7 4\n1 3\n1 2\n2 0 1\n2 1 2\n",
"10 9\n2 2 9\n1 1\n2 0 1\n1 8\n2 0 8\n1 2\n2 1 3\n1 4\n2 2 4\n"
] | [
"4\n3\n",
"7\n2\n10\n4\n5\n"
] | The pictures below show the shapes of the paper during the queries of the first example:
After the first fold operation the sheet has width equal to 4, after the second one the width of the sheet equals to 2. | 1,500 | [
{
"input": "7 4\n1 3\n1 2\n2 0 1\n2 1 2",
"output": "4\n3"
},
{
"input": "10 9\n2 2 9\n1 1\n2 0 1\n1 8\n2 0 8\n1 2\n2 1 3\n1 4\n2 2 4",
"output": "7\n2\n10\n4\n5"
},
{
"input": "10 5\n2 1 9\n2 4 10\n1 1\n2 0 1\n2 0 1",
"output": "8\n6\n2\n2"
},
{
"input": "10 10\n2 5 9\n2 2 9... | 1,410,415,717 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | #include <cstdio>
#include <cstring>
#include <cassert>
const int Len = 100000;
struct node{
int l, r;
int sum;
}T[3*Len+5];
int n, q;
int ans;
int value[Len+5];
void BuildTree(int id, int left, int right)
{
T[id].sum = right-left+1;
T[id].l = left, T[id].r = right;
if (left >= right)... | Title: Appleman and a Sheet of Paper
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Appleman has a very big sheet of paper. This sheet has a form of rectangle with dimensions 1<=×<=*n*. Your task is help Appleman with folding of such a sheet. Actually, you need to perform *q* queries. Eac... | ```python
#include <cstdio>
#include <cstring>
#include <cassert>
const int Len = 100000;
struct node{
int l, r;
int sum;
}T[3*Len+5];
int n, q;
int ans;
int value[Len+5];
void BuildTree(int id, int left, int right)
{
T[id].sum = right-left+1;
T[id].l = left, T[id].r = right;
if (left... | -1 | |
697 | A | Pineapple Incident | PROGRAMMING | 900 | [
"implementation",
"math"
] | null | null | Ted has a pineapple. This pineapple is able to bark like a bulldog! At time *t* (in seconds) it barks for the first time. Then every *s* seconds after it, it barks twice with 1 second interval. Thus it barks at times *t*, *t*<=+<=*s*, *t*<=+<=*s*<=+<=1, *t*<=+<=2*s*, *t*<=+<=2*s*<=+<=1, etc.
Barney woke up in the morn... | The first and only line of input contains three integers *t*, *s* and *x* (0<=≤<=*t*,<=*x*<=≤<=109, 2<=≤<=*s*<=≤<=109) — the time the pineapple barks for the first time, the pineapple barking interval, and the time Barney wants to eat the pineapple respectively. | Print a single "YES" (without quotes) if the pineapple will bark at time *x* or a single "NO" (without quotes) otherwise in the only line of output. | [
"3 10 4\n",
"3 10 3\n",
"3 8 51\n",
"3 8 52\n"
] | [
"NO\n",
"YES\n",
"YES\n",
"YES\n"
] | In the first and the second sample cases pineapple will bark at moments 3, 13, 14, ..., so it won't bark at the moment 4 and will bark at the moment 3.
In the third and fourth sample cases pineapple will bark at moments 3, 11, 12, 19, 20, 27, 28, 35, 36, 43, 44, 51, 52, 59, ..., so it will bark at both moments 51 and ... | 500 | [
{
"input": "3 10 4",
"output": "NO"
},
{
"input": "3 10 3",
"output": "YES"
},
{
"input": "3 8 51",
"output": "YES"
},
{
"input": "3 8 52",
"output": "YES"
},
{
"input": "456947336 740144 45",
"output": "NO"
},
{
"input": "33 232603 599417964",
"ou... | 1,589,830,517 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 77 | 0 | def main():
t, s, x = [int(z) for z in input().split()]
print(solve(t, s, x))
def solve(t, s, x):
cont = 0
if (x-t)%s == 0 or (x-t)%s == 1:
return 'YES'
return 'NO'
main()
| Title: Pineapple Incident
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Ted has a pineapple. This pineapple is able to bark like a bulldog! At time *t* (in seconds) it barks for the first time. Then every *s* seconds after it, it barks twice with 1 second interval. Thus it barks at times... | ```python
def main():
t, s, x = [int(z) for z in input().split()]
print(solve(t, s, x))
def solve(t, s, x):
cont = 0
if (x-t)%s == 0 or (x-t)%s == 1:
return 'YES'
return 'NO'
main()
``` | 0 | |
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":... | 1,699,781,551 | 2,147,483,647 | Python 3 | OK | TESTS | 53 | 92 | 0 | first = input().lower()
second = input().lower()
if first == second:
print(0)
elif min(first, second) == first:
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
first = input().lower()
second = input().lower()
if first == second:
print(0)
elif min(first, second) == first:
print(-1)
else:
print(1)
``` | 3.977 |
580 | A | Kefa and First Steps | PROGRAMMING | 900 | [
"brute force",
"dp",
"implementation"
] | null | null | Kefa decided to make some money doing business on the Internet for exactly *n* days. He knows that on the *i*-th day (1<=≤<=*i*<=≤<=*n*) he makes *a**i* money. Kefa loves progress, that's why he wants to know the length of the maximum non-decreasing subsegment in sequence *a**i*. Let us remind you that the subsegment o... | The first line contains integer *n* (1<=≤<=*n*<=≤<=105).
The second line contains *n* integers *a*1,<=<=*a*2,<=<=...,<=<=*a**n* (1<=≤<=*a**i*<=≤<=109). | Print a single integer — the length of the maximum non-decreasing subsegment of sequence *a*. | [
"6\n2 2 1 3 4 1\n",
"3\n2 2 9\n"
] | [
"3",
"3"
] | In the first test the maximum non-decreasing subsegment is the numbers from the third to the fifth one.
In the second test the maximum non-decreasing subsegment is the numbers from the first to the third one. | 750 | [
{
"input": "6\n2 2 1 3 4 1",
"output": "3"
},
{
"input": "3\n2 2 9",
"output": "3"
},
{
"input": "5\n10 100 111 1 2",
"output": "3"
},
{
"input": "10\n1 2 3 4 1 2 3 4 5 6",
"output": "6"
},
{
"input": "50\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 ... | 1,695,215,588 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 31 | 0 | n = int(input())
l = map(int, input().split())
good_in_a_row = 1
for i in range(n-1):
if l[i] < l[i+1]:
good_in_a_row +=1
else:
good_in_a_row = 1
print(good_in_a_row) | Title: Kefa and First Steps
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Kefa decided to make some money doing business on the Internet for exactly *n* days. He knows that on the *i*-th day (1<=≤<=*i*<=≤<=*n*) he makes *a**i* money. Kefa loves progress, that's why he wants to know the l... | ```python
n = int(input())
l = map(int, input().split())
good_in_a_row = 1
for i in range(n-1):
if l[i] < l[i+1]:
good_in_a_row +=1
else:
good_in_a_row = 1
print(good_in_a_row)
``` | -1 | |
17 | D | Notepad | PROGRAMMING | 2,400 | [
"number theory"
] | D. Notepad | 2 | 64 | Nick is attracted by everything unconventional. He doesn't like decimal number system any more, and he decided to study other number systems. A number system with base *b* caught his attention. Before he starts studying it, he wants to write in his notepad all the numbers of length *n* without leading zeros in this num... | The only input line contains three space-separated integers *b*, *n* and *c* (2<=≤<=*b*<=<<=10106, 1<=≤<=*n*<=<<=10106, 1<=≤<=*c*<=≤<=109). You may consider that Nick has infinite patience, endless amount of paper and representations of digits as characters. The numbers doesn't contain leading zeros. | In the only line output the amount of numbers written on the same page as the last number. | [
"2 3 3\n",
"2 3 4\n"
] | [
"1",
"4"
] | In both samples there are exactly 4 numbers of length 3 in binary number system. In the first sample Nick writes 3 numbers on the first page and 1 on the second page. In the second sample all the 4 numbers can be written on the first page. | 0 | [
{
"input": "2 3 3",
"output": "1"
},
{
"input": "2 3 4",
"output": "4"
},
{
"input": "9 1 79",
"output": "8"
},
{
"input": "9 1 345",
"output": "8"
},
{
"input": "9 9 999982045",
"output": "344373768"
},
{
"input": "4 42 44",
"output": "12"
},
... | 1,689,410,582 | 2,147,483,647 | PyPy 3-64 | TIME_LIMIT_EXCEEDED | TESTS | 28 | 2,000 | 11,571,200 | def phi(n):
ret=n
i=2
while i*i<=n:
if n%i==0:
while n%i==0:
n/=i
ret=ret*(i-1)/i
i+=1
if (n>1):
ret=ret*(n-1)/n
return ret
b, n, c=map(int, input().split())
b%=c
if n==1:
print((b-1)%c)
else:
p = int(phi(c))
q = pow(b, ... | Title: Notepad
Time Limit: 2 seconds
Memory Limit: 64 megabytes
Problem Description:
Nick is attracted by everything unconventional. He doesn't like decimal number system any more, and he decided to study other number systems. A number system with base *b* caught his attention. Before he starts studying it, he wants... | ```python
def phi(n):
ret=n
i=2
while i*i<=n:
if n%i==0:
while n%i==0:
n/=i
ret=ret*(i-1)/i
i+=1
if (n>1):
ret=ret*(n-1)/n
return ret
b, n, c=map(int, input().split())
b%=c
if n==1:
print((b-1)%c)
else:
p = int(phi(c))
q... | 0 |
443 | A | Anton and Letters | PROGRAMMING | 800 | [
"constructive algorithms",
"implementation"
] | null | null | Recently, Anton has found a set. The set consists of small English letters. Anton carefully wrote out all the letters from the set in one line, separated by a comma. He also added an opening curved bracket at the beginning of the line and a closing curved bracket at the end of the line.
Unfortunately, from time to ti... | The first and the single line contains the set of letters. The length of the line doesn't exceed 1000. It is guaranteed that the line starts from an opening curved bracket and ends with a closing curved bracket. Between them, small English letters are listed, separated by a comma. Each comma is followed by a space. | Print a single number — the number of distinct letters in Anton's set. | [
"{a, b, c}\n",
"{b, a, b, a}\n",
"{}\n"
] | [
"3\n",
"2\n",
"0\n"
] | none | 500 | [
{
"input": "{a, b, c}",
"output": "3"
},
{
"input": "{b, a, b, a}",
"output": "2"
},
{
"input": "{}",
"output": "0"
},
{
"input": "{a, a, c, b, b, b, c, c, c, c}",
"output": "3"
},
{
"input": "{a, c, b, b}",
"output": "3"
},
{
"input": "{a, b}",
"o... | 1,694,207,390 | 2,147,483,647 | Python 3 | OK | TESTS | 27 | 46 | 0 | input_list = list(input())
input_list.remove("{")
input_list.remove("}")
while True:
try:
input_list.remove(" ")
except ValueError:
break
while True:
try:
input_list.remove(",")
except ValueError:
break
print(len(set(input_list)))
| Title: Anton and Letters
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Recently, Anton has found a set. The set consists of small English letters. Anton carefully wrote out all the letters from the set in one line, separated by a comma. He also added an opening curved bracket at the begi... | ```python
input_list = list(input())
input_list.remove("{")
input_list.remove("}")
while True:
try:
input_list.remove(" ")
except ValueError:
break
while True:
try:
input_list.remove(",")
except ValueError:
break
print(len(set(input_list)))
``` | 3 | |
664 | A | Complicated GCD | PROGRAMMING | 800 | [
"math",
"number theory"
] | null | null | Greatest common divisor *GCD*(*a*,<=*b*) of two positive integers *a* and *b* is equal to the biggest integer *d* such that both integers *a* and *b* are divisible by *d*. There are many efficient algorithms to find greatest common divisor *GCD*(*a*,<=*b*), for example, Euclid algorithm.
Formally, find the biggest in... | The only line of the input contains two integers *a* and *b* (1<=≤<=*a*<=≤<=*b*<=≤<=10100). | Output one integer — greatest common divisor of all integers from *a* to *b* inclusive. | [
"1 2\n",
"61803398874989484820458683436563811772030917980576 61803398874989484820458683436563811772030917980576\n"
] | [
"1\n",
"61803398874989484820458683436563811772030917980576\n"
] | none | 500 | [
{
"input": "1 2",
"output": "1"
},
{
"input": "61803398874989484820458683436563811772030917980576 61803398874989484820458683436563811772030917980576",
"output": "61803398874989484820458683436563811772030917980576"
},
{
"input": "1 100",
"output": "1"
},
{
"input": "100 100000... | 1,631,689,134 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 61 | 6,758,400 | q=int(input())
while q!=0:
q=q-1
a,b=map(int, input().split())
if a==b:
print(a)
else:
print('1') | Title: Complicated GCD
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Greatest common divisor *GCD*(*a*,<=*b*) of two positive integers *a* and *b* is equal to the biggest integer *d* such that both integers *a* and *b* are divisible by *d*. There are many efficient algorithms to find gre... | ```python
q=int(input())
while q!=0:
q=q-1
a,b=map(int, input().split())
if a==b:
print(a)
else:
print('1')
``` | -1 | |
333 | C | Lucky Tickets | PROGRAMMING | 2,700 | [
"brute force",
"constructive algorithms"
] | null | null | Gerald has a friend, Pollard. Pollard is interested in lucky tickets (ticket is a sequence of digits). At first he thought that a ticket is lucky if between some its digits we can add arithmetic signs and brackets so that the result obtained by the arithmetic expression was number 100. But he quickly analyzed all such ... | The single line contains two integers *k* and *m* (0<=≤<=*k*<=≤<=104, 1<=≤<=*m*<=≤<=3·105). | Print *m* lines. Each line must contain exactly 8 digits — the *k*-winning ticket. The tickets may begin with 0, all tickets must be distinct. If there are more than *m* distinct *k*-lucky tickets, print any *m* of them. It is guaranteed that at least *m* distinct *k*-lucky tickets exist. The tickets can be printed in ... | [
"0 3\n",
"7 4\n"
] | [
"00000000\n00000001\n00000002\n",
"00000007\n00000016\n00000017\n00000018\n"
] | none | 1,500 | [
{
"input": "0 3",
"output": "00000000\n00000001\n00000002"
},
{
"input": "7 4",
"output": "00000007\n00000016\n00000017\n00000018"
},
{
"input": "0 10000",
"output": "00000000\n00000001\n00000002\n00000003\n00000004\n00000005\n00000006\n00000007\n00000008\n00000009\n00000010\n0000001... | 1,477,959,737 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | ch=input('entrer la chaine')
b=0
r=0
c=0
for i in range len(ch):
if ch[i] in 'aeyuioAEYUIO':
b=i
c=r
r+=1
return max(r,c)
| Title: Lucky Tickets
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Gerald has a friend, Pollard. Pollard is interested in lucky tickets (ticket is a sequence of digits). At first he thought that a ticket is lucky if between some its digits we can add arithmetic signs and brackets so that... | ```python
ch=input('entrer la chaine')
b=0
r=0
c=0
for i in range len(ch):
if ch[i] in 'aeyuioAEYUIO':
b=i
c=r
r+=1
return max(r,c)
``` | -1 | |
735 | C | Tennis Championship | PROGRAMMING | 1,600 | [
"combinatorics",
"constructive algorithms",
"greedy",
"math"
] | null | null | Famous Brazil city Rio de Janeiro holds a tennis tournament and Ostap Bender doesn't want to miss this event. There will be *n* players participating, and the tournament will follow knockout rules from the very first game. That means, that if someone loses a game he leaves the tournament immediately.
Organizers are st... | The only line of the input contains a single integer *n* (2<=≤<=*n*<=≤<=1018) — the number of players to participate in the tournament. | Print the maximum number of games in which the winner of the tournament can take part. | [
"2\n",
"3\n",
"4\n",
"10\n"
] | [
"1\n",
"2\n",
"2\n",
"4\n"
] | In all samples we consider that player number 1 is the winner.
In the first sample, there would be only one game so the answer is 1.
In the second sample, player 1 can consequently beat players 2 and 3.
In the third sample, player 1 can't play with each other player as after he plays with players 2 and 3 he can't p... | 1,750 | [
{
"input": "2",
"output": "1"
},
{
"input": "3",
"output": "2"
},
{
"input": "4",
"output": "2"
},
{
"input": "10",
"output": "4"
},
{
"input": "1000",
"output": "14"
},
{
"input": "2500",
"output": "15"
},
{
"input": "690000",
"output"... | 1,583,825,651 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 4 | 140 | 0 | import sys
input=sys.stdin.readline
from math import *
n=int(input())
print(int(ceil(log(n,2)))) | Title: Tennis Championship
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Famous Brazil city Rio de Janeiro holds a tennis tournament and Ostap Bender doesn't want to miss this event. There will be *n* players participating, and the tournament will follow knockout rules from the very firs... | ```python
import sys
input=sys.stdin.readline
from math import *
n=int(input())
print(int(ceil(log(n,2))))
``` | 0 |
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