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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
82 | A | Double Cola | PROGRAMMING | 1,100 | [
"implementation",
"math"
] | A. Double Cola | 1 | 256 | Sheldon, Leonard, Penny, Rajesh and Howard are in the queue for a "Double Cola" drink vending machine; there are no other people in the queue. The first one in the queue (Sheldon) buys a can, drinks it and doubles! The resulting two Sheldons go to the end of the queue. Then the next in the queue (Leonard) buys a can, d... | The input data consist of a single integer *n* (1<=≤<=*n*<=≤<=109).
It is guaranteed that the pretests check the spelling of all the five names, that is, that they contain all the five possible answers. | Print the single line — the name of the person who drinks the *n*-th can of cola. The cans are numbered starting from 1. Please note that you should spell the names like this: "Sheldon", "Leonard", "Penny", "Rajesh", "Howard" (without the quotes). In that order precisely the friends are in the queue initially. | [
"1\n",
"6\n",
"1802\n"
] | [
"Sheldon\n",
"Sheldon\n",
"Penny\n"
] | none | 500 | [
{
"input": "1",
"output": "Sheldon"
},
{
"input": "6",
"output": "Sheldon"
},
{
"input": "1802",
"output": "Penny"
},
{
"input": "1",
"output": "Sheldon"
},
{
"input": "2",
"output": "Leonard"
},
{
"input": "3",
"output": "Penny"
},
{
"inpu... | 1,595,700,407 | 2,147,483,647 | Python 3 | OK | TESTS | 41 | 109 | 6,656,000 | import math
arr = ['', 'Sheldon', 'Leonard', 'Penny', 'Rajesh', 'Howard']
s = int(input())
while s > 5:
s = math.ceil((s - 5) / 2)
print(arr[s]) | Title: Double Cola
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Sheldon, Leonard, Penny, Rajesh and Howard are in the queue for a "Double Cola" drink vending machine; there are no other people in the queue. The first one in the queue (Sheldon) buys a can, drinks it and doubles! The resultin... | ```python
import math
arr = ['', 'Sheldon', 'Leonard', 'Penny', 'Rajesh', 'Howard']
s = int(input())
while s > 5:
s = math.ceil((s - 5) / 2)
print(arr[s])
``` | 3.933102 |
137 | B | Permutation | PROGRAMMING | 1,000 | [
"greedy"
] | null | null | "Hey, it's homework time" — thought Polycarpus and of course he started with his favourite subject, IT. Polycarpus managed to solve all tasks but for the last one in 20 minutes. However, as he failed to solve the last task after some considerable time, the boy asked you to help him.
The sequence of *n* integers is cal... | The first line of the input data contains an integer *n* (1<=≤<=*n*<=≤<=5000) which represents how many numbers are in the sequence. The second line contains a sequence of integers *a**i* (1<=≤<=*a**i*<=≤<=5000,<=1<=≤<=*i*<=≤<=*n*). | Print the only number — the minimum number of changes needed to get the permutation. | [
"3\n3 1 2\n",
"2\n2 2\n",
"5\n5 3 3 3 1\n"
] | [
"0\n",
"1\n",
"2\n"
] | The first sample contains the permutation, which is why no replacements are required.
In the second sample it is enough to replace the first element with the number 1 and that will make the sequence the needed permutation.
In the third sample we can replace the second element with number 4 and the fourth element with... | 1,000 | [
{
"input": "3\n3 1 2",
"output": "0"
},
{
"input": "2\n2 2",
"output": "1"
},
{
"input": "5\n5 3 3 3 1",
"output": "2"
},
{
"input": "5\n6 6 6 6 6",
"output": "5"
},
{
"input": "10\n1 1 2 2 8 8 7 7 9 9",
"output": "5"
},
{
"input": "8\n9 8 7 6 5 4 3 2"... | 1,377,875,090 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 62 | 0 | import sys
f = sys.stdin
#f = open("input.txt", "r")
n = int(f.readline().strip())
a = [int(i) for i in f.readline().strip().split()]
a1 = set(a)
print(n - len(a1)) | Title: Permutation
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
"Hey, it's homework time" — thought Polycarpus and of course he started with his favourite subject, IT. Polycarpus managed to solve all tasks but for the last one in 20 minutes. However, as he failed to solve the last task ... | ```python
import sys
f = sys.stdin
#f = open("input.txt", "r")
n = int(f.readline().strip())
a = [int(i) for i in f.readline().strip().split()]
a1 = set(a)
print(n - len(a1))
``` | 0 | |
678 | C | Joty and Chocolate | PROGRAMMING | 1,600 | [
"implementation",
"math",
"number theory"
] | null | null | Little Joty has got a task to do. She has a line of *n* tiles indexed from 1 to *n*. She has to paint them in a strange pattern.
An unpainted tile should be painted Red if it's index is divisible by *a* and an unpainted tile should be painted Blue if it's index is divisible by *b*. So the tile with the number divisibl... | The only line contains five integers *n*, *a*, *b*, *p* and *q* (1<=≤<=*n*,<=*a*,<=*b*,<=*p*,<=*q*<=≤<=109). | Print the only integer *s* — the maximum number of chocolates Joty can get.
Note that the answer can be 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. | [
"5 2 3 12 15\n",
"20 2 3 3 5\n"
] | [
"39\n",
"51\n"
] | none | 0 | [
{
"input": "5 2 3 12 15",
"output": "39"
},
{
"input": "20 2 3 3 5",
"output": "51"
},
{
"input": "1 1 1 1 1",
"output": "1"
},
{
"input": "1 2 2 2 2",
"output": "0"
},
{
"input": "2 1 3 3 3",
"output": "6"
},
{
"input": "3 1 1 3 3",
"output": "9"
... | 1,650,388,460 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 13 | 1,000 | 0 | n,a,b,p,q=map(int,input().split())
ans=0
if(p>q):
for i in range(1,n+1):
if(i%a==0 and i%b!=0):
ans+=p
elif(i%a!=0 and i%b==0):
ans+=q
elif(i%a==0 and i%b==0):
ans+=p
else:
for i in range(1,n+1):
if(i%a==0 and i%b!=0):
... | Title: Joty and Chocolate
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little Joty has got a task to do. She has a line of *n* tiles indexed from 1 to *n*. She has to paint them in a strange pattern.
An unpainted tile should be painted Red if it's index is divisible by *a* and an unpai... | ```python
n,a,b,p,q=map(int,input().split())
ans=0
if(p>q):
for i in range(1,n+1):
if(i%a==0 and i%b!=0):
ans+=p
elif(i%a!=0 and i%b==0):
ans+=q
elif(i%a==0 and i%b==0):
ans+=p
else:
for i in range(1,n+1):
if(i%a==0 and i%b!=0):
... | 0 | |
0 | none | none | none | 0 | [
"none"
] | null | null | Robbers, who attacked the Gerda's cab, are very successful in covering from the kingdom police. To make the goal of catching them even harder, they use their own watches.
First, as they know that kingdom police is bad at math, robbers use the positional numeral system with base 7. Second, they divide one day in *n* ho... | The first line of the input contains two integers, given in the decimal notation, *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=109) — the number of hours in one day and the number of minutes in one hour, respectively. | Print one integer in decimal notation — the number of different pairs of hour and minute, such that all digits displayed on the watches are distinct. | [
"2 3\n",
"8 2\n"
] | [
"4\n",
"5\n"
] | In the first sample, possible pairs are: (0: 1), (0: 2), (1: 0), (1: 2).
In the second sample, possible pairs are: (02: 1), (03: 1), (04: 1), (05: 1), (06: 1). | 0 | [
{
"input": "2 3",
"output": "4"
},
{
"input": "8 2",
"output": "5"
},
{
"input": "1 1",
"output": "0"
},
{
"input": "1 2",
"output": "1"
},
{
"input": "8 8",
"output": "0"
},
{
"input": "50 50",
"output": "0"
},
{
"input": "344 344",
"o... | 1,689,453,670 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 0 | 31 | 0 | print("_RANDOM_GUESS_1689453669.9193208")# 1689453669.9193408 | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Robbers, who attacked the Gerda's cab, are very successful in covering from the kingdom police. To make the goal of catching them even harder, they use their own watches.
First, as they know that kingdom police is bad at math, ro... | ```python
print("_RANDOM_GUESS_1689453669.9193208")# 1689453669.9193408
``` | 0 | |
43 | A | Football | PROGRAMMING | 1,000 | [
"strings"
] | A. Football | 2 | 256 | One day Vasya decided to have a look at the results of Berland 1910 Football Championship’s finals. Unfortunately he didn't find the overall score of the match; however, he got hold of a profound description of the match's process. On the whole there are *n* lines in that description each of which described one goal. E... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=100) — the number of lines in the description. Then follow *n* lines — for each goal the names of the teams that scored it. The names are non-empty lines consisting of uppercase Latin letters whose lengths do not exceed 10 symbols. It is guaranteed that the match di... | Print the name of the winning team. We remind you that in football the team that scores more goals is considered the winner. | [
"1\nABC\n",
"5\nA\nABA\nABA\nA\nA\n"
] | [
"ABC\n",
"A\n"
] | none | 500 | [
{
"input": "1\nABC",
"output": "ABC"
},
{
"input": "5\nA\nABA\nABA\nA\nA",
"output": "A"
},
{
"input": "2\nXTSJEP\nXTSJEP",
"output": "XTSJEP"
},
{
"input": "3\nXZYDJAEDZ\nXZYDJAEDZ\nXZYDJAEDZ",
"output": "XZYDJAEDZ"
},
{
"input": "3\nQCCYXL\nQCCYXL\nAXGLFQDD",
... | 1,649,700,621 | 2,147,483,647 | Python 3 | OK | TESTS | 34 | 92 | 0 | Goles=int(input())
Team1=input()
Cont1=1
Team2=""
Cont2=0
for K in range(1,Goles):
TeamX=input()
if(Team1!=TeamX):
Team2=TeamX
Cont2=Cont2+1
else:
Cont1=Cont1+1
if(Cont1>Cont2):
print(Team1)
else:
print(Team2)
| Title: Football
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
One day Vasya decided to have a look at the results of Berland 1910 Football Championship’s finals. Unfortunately he didn't find the overall score of the match; however, he got hold of a profound description of the match's process... | ```python
Goles=int(input())
Team1=input()
Cont1=1
Team2=""
Cont2=0
for K in range(1,Goles):
TeamX=input()
if(Team1!=TeamX):
Team2=TeamX
Cont2=Cont2+1
else:
Cont1=Cont1+1
if(Cont1>Cont2):
print(Team1)
else:
print(Team2)
``` | 3.977 |
990 | E | Post Lamps | PROGRAMMING | 2,100 | [
"brute force",
"greedy"
] | null | null | Adilbek's house is located on a street which can be represented as the OX axis. This street is really dark, so Adilbek wants to install some post lamps to illuminate it. Street has $n$ positions to install lamps, they correspond to the integer numbers from $0$ to $n - 1$ on the OX axis. However, some positions are bloc... | The first line contains three integer numbers $n$, $m$ and $k$ ($1 \le k \le n \le 10^6$, $0 \le m \le n$) — the length of the segment of the street Adilbek wants to illuminate, the number of the blocked positions and the maximum power of the post lamp available.
The second line contains $m$ integer numbers $s_1, s_2,... | Print the minimal total cost of the post lamps of exactly one type Adilbek can buy to illuminate the entire segment $[0; n]$ of the street.
If illumintaing the entire segment $[0; n]$ is impossible, print -1. | [
"6 2 3\n1 3\n1 2 3\n",
"4 3 4\n1 2 3\n1 10 100 1000\n",
"5 1 5\n0\n3 3 3 3 3\n",
"7 4 3\n2 4 5 6\n3 14 15\n"
] | [
"6\n",
"1000\n",
"-1\n",
"-1\n"
] | none | 0 | [
{
"input": "6 2 3\n1 3\n1 2 3",
"output": "6"
},
{
"input": "4 3 4\n1 2 3\n1 10 100 1000",
"output": "1000"
},
{
"input": "5 1 5\n0\n3 3 3 3 3",
"output": "-1"
},
{
"input": "7 4 3\n2 4 5 6\n3 14 15",
"output": "-1"
},
{
"input": "1 0 1\n\n1000000",
"output": ... | 1,528,792,051 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 12 | 2,000 | 138,137,600 | import math;
#import random;
#import time;
import heapq;
def getIntList():
return list(map(int, input().split()));
def getTransIntList(n):
first=getIntList();
m=len(first);
result=[[0]*n for _ in range(m)];
for i in range(m):
result[i][0]=first[i];
for j in range(1, n):
... | Title: Post Lamps
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Adilbek's house is located on a street which can be represented as the OX axis. This street is really dark, so Adilbek wants to install some post lamps to illuminate it. Street has $n$ positions to install lamps, they corres... | ```python
import math;
#import random;
#import time;
import heapq;
def getIntList():
return list(map(int, input().split()));
def getTransIntList(n):
first=getIntList();
m=len(first);
result=[[0]*n for _ in range(m)];
for i in range(m):
result[i][0]=first[i];
for j in range(1,... | 0 | |
813 | B | The Golden Age | PROGRAMMING | 1,800 | [
"brute force",
"math"
] | null | null | Unlucky year in Berland is such a year that its number *n* can be represented as *n*<==<=*x**a*<=+<=*y**b*, where *a* and *b* are non-negative integer numbers.
For example, if *x*<==<=2 and *y*<==<=3 then the years 4 and 17 are unlucky (4<==<=20<=+<=31, 17<==<=23<=+<=32<==<=24<=+<=30) and year 18 isn't unlucky as the... | The first line contains four integer numbers *x*, *y*, *l* and *r* (2<=≤<=*x*,<=*y*<=≤<=1018, 1<=≤<=*l*<=≤<=*r*<=≤<=1018). | Print the maximum length of The Golden Age within the interval [*l*,<=*r*].
If all years in the interval [*l*,<=*r*] are unlucky then print 0. | [
"2 3 1 10\n",
"3 5 10 22\n",
"2 3 3 5\n"
] | [
"1\n",
"8\n",
"0\n"
] | In the first example the unlucky years are 2, 3, 4, 5, 7, 9 and 10. So maximum length of The Golden Age is achived in the intervals [1, 1], [6, 6] and [8, 8].
In the second example the longest Golden Age is the interval [15, 22]. | 0 | [
{
"input": "2 3 1 10",
"output": "1"
},
{
"input": "3 5 10 22",
"output": "8"
},
{
"input": "2 3 3 5",
"output": "0"
},
{
"input": "2 2 1 10",
"output": "1"
},
{
"input": "2 2 1 1000000",
"output": "213568"
},
{
"input": "2 2 1 1000000000000000000",
... | 1,681,742,756 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 85 | 93 | 1,536,000 | x, y, l, r = map(int, input().split())
m = []
a = 0
b = 0
while x**a <= r:
while x**a + y**b <= r:
d = x**a + y**b
if d >= l:
m.append(x**a + y**b)
b += 1
a += 1
b = 0
m = list(set(m))
m.sort()
ma = 0
if len(m) == 0:
print(r - l + 1)
exit(0)
for ... | Title: The Golden Age
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Unlucky year in Berland is such a year that its number *n* can be represented as *n*<==<=*x**a*<=+<=*y**b*, where *a* and *b* are non-negative integer numbers.
For example, if *x*<==<=2 and *y*<==<=3 then the years 4 a... | ```python
x, y, l, r = map(int, input().split())
m = []
a = 0
b = 0
while x**a <= r:
while x**a + y**b <= r:
d = x**a + y**b
if d >= l:
m.append(x**a + y**b)
b += 1
a += 1
b = 0
m = list(set(m))
m.sort()
ma = 0
if len(m) == 0:
print(r - l + 1)
exi... | 3 | |
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... | 1,665,189,217 | 2,147,483,647 | Python 3 | OK | TESTS | 40 | 124 | 0 | x = input()
y = input()
k = list(y)
k.reverse()
s = ''.join(k)
if(x==s):
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
x = input()
y = input()
k = list(y)
k.reverse()
s = ''.join(k)
if(x==s):
print("YES")
else:
print("NO")
``` | 3.969 |
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?",
... | 1,651,595,549 | 2,147,483,647 | PyPy 3 | OK | TESTS | 35 | 186 | 0 | vowel = ['A', 'E', 'I', 'O', 'U', 'Y']
question = input()
question = question.upper().replace(' ', '')
if question[-2] in vowel:
print('YES')
else:
print('NO')
| Title: Sleuth
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya plays the sleuth with his friends. The rules of the game are as follows: those who play for the first time, that is Vasya is the sleuth, he should investigate a "crime" and find out what is happening. He can ask any questions ... | ```python
vowel = ['A', 'E', 'I', 'O', 'U', 'Y']
question = input()
question = question.upper().replace(' ', '')
if question[-2] in vowel:
print('YES')
else:
print('NO')
``` | 3.9535 |
34 | A | Reconnaissance 2 | PROGRAMMING | 800 | [
"implementation"
] | A. Reconnaissance 2 | 2 | 256 | *n* soldiers stand in a circle. For each soldier his height *a**i* is known. A reconnaissance unit can be made of such two neighbouring soldiers, whose heights difference is minimal, i.e. |*a**i*<=-<=*a**j*| is minimal. So each of them will be less noticeable with the other. Output any pair of soldiers that can form a ... | The first line contains integer *n* (2<=≤<=*n*<=≤<=100) — amount of soldiers. Then follow the heights of the soldiers in their order in the circle — *n* space-separated integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=1000). The soldier heights are given in clockwise or counterclockwise direction. | Output two integers — indexes of neighbouring soldiers, who should form a reconnaissance unit. If there are many optimum solutions, output any of them. Remember, that the soldiers stand in a circle. | [
"5\n10 12 13 15 10\n",
"4\n10 20 30 40\n"
] | [
"5 1\n",
"1 2\n"
] | none | 500 | [
{
"input": "5\n10 12 13 15 10",
"output": "5 1"
},
{
"input": "4\n10 20 30 40",
"output": "1 2"
},
{
"input": "6\n744 359 230 586 944 442",
"output": "2 3"
},
{
"input": "5\n826 747 849 687 437",
"output": "1 2"
},
{
"input": "5\n999 999 993 969 999",
"output"... | 1,619,259,767 | 2,147,483,647 | PyPy 3 | OK | TESTS | 20 | 218 | 0 | n = int(input())
l = list(map(int,input().split()))
a=10000000
b=100000000
maxi = 999999999999
i=0
j=1
while(i<n and j<n):
if abs(l[i]-l[j])<maxi:
maxi = abs(l[i]-l[j])
a = i+1
b = j+1
i+=1
j+=1
if abs(l[-1]-l[0])<maxi:
maxi = abs(l[-1]-l[0])
a = 1
b = ... | Title: Reconnaissance 2
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
*n* soldiers stand in a circle. For each soldier his height *a**i* is known. A reconnaissance unit can be made of such two neighbouring soldiers, whose heights difference is minimal, i.e. |*a**i*<=-<=*a**j*| is minimal. So... | ```python
n = int(input())
l = list(map(int,input().split()))
a=10000000
b=100000000
maxi = 999999999999
i=0
j=1
while(i<n and j<n):
if abs(l[i]-l[j])<maxi:
maxi = abs(l[i]-l[j])
a = i+1
b = j+1
i+=1
j+=1
if abs(l[-1]-l[0])<maxi:
maxi = abs(l[-1]-l[0])
a = 1... | 3.9455 |
433 | B | Kuriyama Mirai's Stones | PROGRAMMING | 1,200 | [
"dp",
"implementation",
"sortings"
] | null | null | Kuriyama Mirai has killed many monsters and got many (namely *n*) stones. She numbers the stones from 1 to *n*. The cost of the *i*-th stone is *v**i*. Kuriyama Mirai wants to know something about these stones so she will ask you two kinds of questions:
1. She will tell you two numbers, *l* and *r* (1<=≤<=*l*<=≤<=*r*... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=105). The second line contains *n* integers: *v*1,<=*v*2,<=...,<=*v**n* (1<=≤<=*v**i*<=≤<=109) — costs of the stones.
The third line contains an integer *m* (1<=≤<=*m*<=≤<=105) — the number of Kuriyama Mirai's questions. Then follow *m* lines, each line contains t... | Print *m* lines. Each line must contain an integer — the answer to Kuriyama Mirai's question. Print the answers to the questions in the order of input. | [
"6\n6 4 2 7 2 7\n3\n2 3 6\n1 3 4\n1 1 6\n",
"4\n5 5 2 3\n10\n1 2 4\n2 1 4\n1 1 1\n2 1 4\n2 1 2\n1 1 1\n1 3 3\n1 1 3\n1 4 4\n1 2 2\n"
] | [
"24\n9\n28\n",
"10\n15\n5\n15\n5\n5\n2\n12\n3\n5\n"
] | Please note that the answers to the questions may overflow 32-bit integer type. | 1,500 | [
{
"input": "6\n6 4 2 7 2 7\n3\n2 3 6\n1 3 4\n1 1 6",
"output": "24\n9\n28"
},
{
"input": "4\n5 5 2 3\n10\n1 2 4\n2 1 4\n1 1 1\n2 1 4\n2 1 2\n1 1 1\n1 3 3\n1 1 3\n1 4 4\n1 2 2",
"output": "10\n15\n5\n15\n5\n5\n2\n12\n3\n5"
},
{
"input": "4\n2 2 3 6\n9\n2 2 3\n1 1 3\n2 2 3\n2 2 3\n2 2 2\n1... | 1,626,300,582 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 3 | 2,000 | 9,523,200 | #https://codeforces.com/contest/433/problem/B
n = int(input())
stones = list(map(int,input().split()))
m = int(input())
for i in range (m):
type,l,r = list(map(int,input().split()))
if type == 1:
print(sum(stones[l-1:r]))
else:
print(sum(sorted(stones)[l-1:r])) | Title: Kuriyama Mirai's Stones
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Kuriyama Mirai has killed many monsters and got many (namely *n*) stones. She numbers the stones from 1 to *n*. The cost of the *i*-th stone is *v**i*. Kuriyama Mirai wants to know something about these stones s... | ```python
#https://codeforces.com/contest/433/problem/B
n = int(input())
stones = list(map(int,input().split()))
m = int(input())
for i in range (m):
type,l,r = list(map(int,input().split()))
if type == 1:
print(sum(stones[l-1:r]))
else:
print(sum(sorted(stones)[l-1:r]))
``` | 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... | 1,597,174,886 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 109 | 20,172,800 | step, index = map(int, input().split())
listak = (1,)
for i in range(2, step + 1):
listak = listak + (step,) + listak
print(listak[index+1])
| Title: Chloe and the sequence
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Chloe, the same as Vladik, is a competitive programmer. She didn't have any problems to get to the olympiad like Vladik, but she was confused by the task proposed on the olympiad.
Let's consider the following a... | ```python
step, index = map(int, input().split())
listak = (1,)
for i in range(2, step + 1):
listak = listak + (step,) + listak
print(listak[index+1])
``` | 0 | |
540 | A | Combination Lock | PROGRAMMING | 800 | [
"implementation"
] | null | null | Scrooge McDuck keeps his most treasured savings in a home safe with a combination lock. Each time he wants to put there the treasures that he's earned fair and square, he has to open the lock.
The combination lock is represented by *n* rotating disks with digits from 0 to 9 written on them. Scrooge McDuck has to turn ... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of disks on the combination lock.
The second line contains a string of *n* digits — the original state of the disks.
The third line contains a string of *n* digits — Scrooge McDuck's combination that opens the lock. | Print a single integer — the minimum number of moves Scrooge McDuck needs to open the lock. | [
"5\n82195\n64723\n"
] | [
"13\n"
] | In the sample he needs 13 moves:
- 1 disk: <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/b8967f65a723782358b93eff9ce69f336817cf70.png" style="max-width: 100.0%;max-height: 100.0%;"/> - 2 disk: <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/07fa58573ece0d32... | 500 | [
{
"input": "5\n82195\n64723",
"output": "13"
},
{
"input": "12\n102021090898\n010212908089",
"output": "16"
},
{
"input": "1\n8\n1",
"output": "3"
},
{
"input": "2\n83\n57",
"output": "7"
},
{
"input": "10\n0728592530\n1362615763",
"output": "27"
},
{
... | 1,601,909,966 | 2,147,483,647 | PyPy 3 | OK | TESTS | 43 | 156 | 0 | n = int(input())
s1 = input()
s2 = input()
ans = 0
for i in range(0, n):
if int(s1[i]) > int(s2[i]):
if int(s1[i]) - int(s2[i]) <= 9 - int(s1[i]) + int(s2[i]) + 1:
ans += int(s1[i]) - int(s2[i])
else:
ans += 9 - int(s1[i]) + int(s2[i]) + 1
elif int(s1[i]) < int(... | Title: Combination Lock
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Scrooge McDuck keeps his most treasured savings in a home safe with a combination lock. Each time he wants to put there the treasures that he's earned fair and square, he has to open the lock.
The combination lock is ... | ```python
n = int(input())
s1 = input()
s2 = input()
ans = 0
for i in range(0, n):
if int(s1[i]) > int(s2[i]):
if int(s1[i]) - int(s2[i]) <= 9 - int(s1[i]) + int(s2[i]) + 1:
ans += int(s1[i]) - int(s2[i])
else:
ans += 9 - int(s1[i]) + int(s2[i]) + 1
elif int(s1[... | 3 | |
515 | A | Drazil and Date | PROGRAMMING | 1,000 | [
"math"
] | null | null | Someday, Drazil wanted to go on date with Varda. Drazil and Varda live on Cartesian plane. Drazil's home is located in point (0,<=0) and Varda's home is located in point (*a*,<=*b*). In each step, he can move in a unit distance in horizontal or vertical direction. In other words, from position (*x*,<=*y*) he can go to ... | You are given three integers *a*, *b*, and *s* (<=-<=109<=≤<=*a*,<=*b*<=≤<=109, 1<=≤<=*s*<=≤<=2·109) in a single line. | If you think Drazil made a mistake and it is impossible to take exactly *s* steps and get from his home to Varda's home, print "No" (without quotes).
Otherwise, print "Yes". | [
"5 5 11\n",
"10 15 25\n",
"0 5 1\n",
"0 0 2\n"
] | [
"No\n",
"Yes\n",
"No\n",
"Yes\n"
] | In fourth sample case one possible route is: <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/0d30660ddf6eb6c64ffd071055a4e8ddd016cde5.png" style="max-width: 100.0%;max-height: 100.0%;"/>. | 500 | [
{
"input": "5 5 11",
"output": "No"
},
{
"input": "10 15 25",
"output": "Yes"
},
{
"input": "0 5 1",
"output": "No"
},
{
"input": "0 0 2",
"output": "Yes"
},
{
"input": "999999999 999999999 2000000000",
"output": "Yes"
},
{
"input": "-606037695 9983201... | 1,670,070,846 | 2,147,483,647 | Python 3 | OK | TESTS | 40 | 46 | 0 | a,b,s = [int(x) for x in input().split()]
temp = s-abs(a)-abs(b)
print("Yes" if temp%2==0 and temp>=0 else "No") | Title: Drazil and Date
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Someday, Drazil wanted to go on date with Varda. Drazil and Varda live on Cartesian plane. Drazil's home is located in point (0,<=0) and Varda's home is located in point (*a*,<=*b*). In each step, he can move in a unit ... | ```python
a,b,s = [int(x) for x in input().split()]
temp = s-abs(a)-abs(b)
print("Yes" if temp%2==0 and temp>=0 else "No")
``` | 3 | |
873 | B | Balanced Substring | PROGRAMMING | 1,500 | [
"dp",
"implementation"
] | null | null | You are given a string *s* consisting only of characters 0 and 1. A substring [*l*,<=*r*] of *s* is a string *s**l**s**l*<=+<=1*s**l*<=+<=2... *s**r*, and its length equals to *r*<=-<=*l*<=+<=1. A substring is called balanced if the number of zeroes (0) equals to the number of ones in this substring.
You have to deter... | The first line contains *n* (1<=≤<=*n*<=≤<=100000) — the number of characters in *s*.
The second line contains a string *s* consisting of exactly *n* characters. Only characters 0 and 1 can appear in *s*. | If there is no non-empty balanced substring in *s*, print 0. Otherwise, print the length of the longest balanced substring. | [
"8\n11010111\n",
"3\n111\n"
] | [
"4\n",
"0\n"
] | In the first example you can choose the substring [3, 6]. It is balanced, and its length is 4. Choosing the substring [2, 5] is also possible.
In the second example it's impossible to find a non-empty balanced substring. | 0 | [
{
"input": "8\n11010111",
"output": "4"
},
{
"input": "3\n111",
"output": "0"
},
{
"input": "11\n00001000100",
"output": "2"
},
{
"input": "10\n0100000000",
"output": "2"
},
{
"input": "13\n0001000011010",
"output": "6"
},
{
"input": "14\n0000010010101... | 1,602,251,361 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 11 | 93 | 307,200 | n=int(input())
s=input()
l=[]
for i in s:
if i=='1':
l.append(1)
else:
l.append(-1)
dp=[0 for i in range(n)]
dp[0]=l[0]
for i in range(1,len(l)):
dp[i]=dp[i-1]+l[i]
d={}
maxlen=0
for i in range(len(dp)):
if dp[i] not in d:
d[dp[i]]=i
e... | Title: Balanced Substring
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given a string *s* consisting only of characters 0 and 1. A substring [*l*,<=*r*] of *s* is a string *s**l**s**l*<=+<=1*s**l*<=+<=2... *s**r*, and its length equals to *r*<=-<=*l*<=+<=1. A substring is called... | ```python
n=int(input())
s=input()
l=[]
for i in s:
if i=='1':
l.append(1)
else:
l.append(-1)
dp=[0 for i in range(n)]
dp[0]=l[0]
for i in range(1,len(l)):
dp[i]=dp[i-1]+l[i]
d={}
maxlen=0
for i in range(len(dp)):
if dp[i] not in d:
d[dp[i]]=... | 0 | |
1,006 | A | Adjacent Replacements | PROGRAMMING | 800 | [
"implementation"
] | null | null | Mishka got an integer array $a$ of length $n$ as a birthday present (what a surprise!).
Mishka doesn't like this present and wants to change it somehow. He has invented an algorithm and called it "Mishka's Adjacent Replacements Algorithm". This algorithm can be represented as a sequence of steps:
- Replace each occu... | The first line of the input contains one integer number $n$ ($1 \le n \le 1000$) — the number of elements in Mishka's birthday present (surprisingly, an array).
The second line of the input contains $n$ integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 10^9$) — the elements of the array. | Print $n$ integers — $b_1, b_2, \dots, b_n$, where $b_i$ is the final value of the $i$-th element of the array after applying "Mishka's Adjacent Replacements Algorithm" to the array $a$. Note that you cannot change the order of elements in the array. | [
"5\n1 2 4 5 10\n",
"10\n10000 10 50605065 1 5 89 5 999999999 60506056 1000000000\n"
] | [
"1 1 3 5 9\n",
"9999 9 50605065 1 5 89 5 999999999 60506055 999999999\n"
] | The first example is described in the problem statement. | 0 | [
{
"input": "5\n1 2 4 5 10",
"output": "1 1 3 5 9"
},
{
"input": "10\n10000 10 50605065 1 5 89 5 999999999 60506056 1000000000",
"output": "9999 9 50605065 1 5 89 5 999999999 60506055 999999999"
},
{
"input": "1\n999999999",
"output": "999999999"
},
{
"input": "1\n1000000000",... | 1,603,870,651 | 331 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | from sys import stdin, stdout
def main():
A = [int(num) for num in stdin.readline().strip().split()]
output = []
for num in A:
if num%2 != 0:
output.append(str(num))
else:
output.append(str(num-1))
stdout.write(' '.join(output))
if __name__ == '__main__... | Title: Adjacent Replacements
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Mishka got an integer array $a$ of length $n$ as a birthday present (what a surprise!).
Mishka doesn't like this present and wants to change it somehow. He has invented an algorithm and called it "Mishka's Adjace... | ```python
from sys import stdin, stdout
def main():
A = [int(num) for num in stdin.readline().strip().split()]
output = []
for num in A:
if num%2 != 0:
output.append(str(num))
else:
output.append(str(num-1))
stdout.write(' '.join(output))
if __name__ ==... | -1 | |
863 | A | Quasi-palindrome | PROGRAMMING | 900 | [
"brute force",
"implementation"
] | null | null | Let quasi-palindromic number be such number that adding some leading zeros (possible none) to it produces a palindromic string.
String *t* is called a palindrome, if it reads the same from left to right and from right to left.
For example, numbers 131 and 2010200 are quasi-palindromic, they can be transformed to str... | The first line contains one integer number *x* (1<=≤<=*x*<=≤<=109). This number is given without any leading zeroes. | Print "YES" if number *x* is quasi-palindromic. Otherwise, print "NO" (without quotes). | [
"131\n",
"320\n",
"2010200\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | none | 0 | [
{
"input": "131",
"output": "YES"
},
{
"input": "320",
"output": "NO"
},
{
"input": "2010200",
"output": "YES"
},
{
"input": "1",
"output": "YES"
},
{
"input": "1000000000",
"output": "YES"
},
{
"input": "999999999",
"output": "YES"
},
{
"i... | 1,697,910,922 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | #Lina.pinzon
a = list (input ())
while (a[-1] == '0'):
a.pop ()
t = a[::-1]
if (t == a) :
print ("YES")
else:
print ("NO")
a = list (input ())
while (a[-1] == '0'):
a.pop ()
t = a[::-1]
if (t == a) :
print ("YES")
else:
print ("NO")
#complejidad 0(n)
| Title: Quasi-palindrome
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Let quasi-palindromic number be such number that adding some leading zeros (possible none) to it produces a palindromic string.
String *t* is called a palindrome, if it reads the same from left to right and from righ... | ```python
#Lina.pinzon
a = list (input ())
while (a[-1] == '0'):
a.pop ()
t = a[::-1]
if (t == a) :
print ("YES")
else:
print ("NO")
a = list (input ())
while (a[-1] == '0'):
a.pop ()
t = a[::-1]
if (t == a) :
print ("YES")
else:
print ("NO")
#complejidad 0(n)
... | -1 | |
964 | A | Splits | PROGRAMMING | 800 | [
"math"
] | null | null | Let's define a split of $n$ as a nonincreasing sequence of positive integers, the sum of which is $n$.
For example, the following sequences are splits of $8$: $[4, 4]$, $[3, 3, 2]$, $[2, 2, 1, 1, 1, 1]$, $[5, 2, 1]$.
The following sequences aren't splits of $8$: $[1, 7]$, $[5, 4]$, $[11, -3]$, $[1, 1, 4, 1, 1]$.
Th... | The first line contains one integer $n$ ($1 \leq n \leq 10^9$). | Output one integer — the answer to the problem. | [
"7\n",
"8\n",
"9\n"
] | [
"4\n",
"5\n",
"5\n"
] | In the first sample, there are following possible weights of splits of $7$:
Weight 1: [$\textbf 7$]
Weight 2: [$\textbf 3$, $\textbf 3$, 1]
Weight 3: [$\textbf 2$, $\textbf 2$, $\textbf 2$, 1]
Weight 7: [$\textbf 1$, $\textbf 1$, $\textbf 1$, $\textbf 1$, $\textbf 1$, $\textbf 1$, $\textbf 1$] | 500 | [
{
"input": "7",
"output": "4"
},
{
"input": "8",
"output": "5"
},
{
"input": "9",
"output": "5"
},
{
"input": "1",
"output": "1"
},
{
"input": "286",
"output": "144"
},
{
"input": "48",
"output": "25"
},
{
"input": "941",
"output": "471... | 1,541,769,976 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 77 | 0 | a=input()
b=a/2+1
print(b) | Title: Splits
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Let's define a split of $n$ as a nonincreasing sequence of positive integers, the sum of which is $n$.
For example, the following sequences are splits of $8$: $[4, 4]$, $[3, 3, 2]$, $[2, 2, 1, 1, 1, 1]$, $[5, 2, 1]$.
The foll... | ```python
a=input()
b=a/2+1
print(b)
``` | -1 | |
33 | A | What is for dinner? | PROGRAMMING | 1,200 | [
"greedy",
"implementation"
] | A. What is for dinner? | 2 | 256 | In one little known, but very beautiful country called Waterland, lives a lovely shark Valerie. Like all the sharks, she has several rows of teeth, and feeds on crucians. One of Valerie's distinguishing features is that while eating one crucian she uses only one row of her teeth, the rest of the teeth are "relaxing".
... | The first line contains three integers *n*, *m*, *k* (1<=≤<=*m*<=≤<=*n*<=≤<=1000,<=0<=≤<=*k*<=≤<=106) — total amount of Valerie's teeth, amount of tooth rows and amount of crucians in Valerie's portion for dinner. Then follow *n* lines, each containing two integers: *r* (1<=≤<=*r*<=≤<=*m*) — index of the row, where bel... | In the first line output the maximum amount of crucians that Valerie can consume for dinner. | [
"4 3 18\n2 3\n1 2\n3 6\n2 3\n",
"2 2 13\n1 13\n2 12\n"
] | [
"11\n",
"13\n"
] | none | 500 | [
{
"input": "4 3 18\n2 3\n1 2\n3 6\n2 3",
"output": "11"
},
{
"input": "2 2 13\n1 13\n2 12",
"output": "13"
},
{
"input": "5 4 8\n4 6\n4 5\n1 3\n2 0\n3 3",
"output": "8"
},
{
"input": "1 1 0\n1 3",
"output": "0"
},
{
"input": "7 1 30\n1 8\n1 15\n1 5\n1 17\n1 9\n1 1... | 1,619,171,069 | 2,147,483,647 | Python 3 | OK | TESTS | 31 | 154 | 204,800 | n, m, k = [int(item) for item in input().split(" ")]
total = 0
cont = dict()
for i in range(n):
row, viability = [int(item) for item in input().split(" ")]
#if row in cont:
# if cont[row] > viability:
# cont[row] = viability
#if not row in cont:
# cont[row: viability]
... | Title: What is for dinner?
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
In one little known, but very beautiful country called Waterland, lives a lovely shark Valerie. Like all the sharks, she has several rows of teeth, and feeds on crucians. One of Valerie's distinguishing features is that... | ```python
n, m, k = [int(item) for item in input().split(" ")]
total = 0
cont = dict()
for i in range(n):
row, viability = [int(item) for item in input().split(" ")]
#if row in cont:
# if cont[row] > viability:
# cont[row] = viability
#if not row in cont:
# cont[row: viab... | 3.961119 |
0 | none | none | none | 0 | [
"none"
] | null | null | As behooves any intelligent schoolboy, Kevin Sun is studying psycowlogy, cowculus, and cryptcowgraphy at the Bovinia State University (BGU) under Farmer Ivan. During his Mathematics of Olympiads (MoO) class, Kevin was confronted with a weird functional equation and needs your help. For two fixed integers *k* and *p*, w... | The input consists of two space-separated integers *p* and *k* (3<=≤<=*p*<=≤<=1<=000<=000, 0<=≤<=*k*<=≤<=*p*<=-<=1) on a single line. It is guaranteed that *p* is an odd prime number. | Print a single integer, the number of distinct functions *f* modulo 109<=+<=7. | [
"3 2\n",
"5 4\n"
] | [
"3\n",
"25\n"
] | In the first sample, *p* = 3 and *k* = 2. The following functions work:
1. *f*(0) = 0, *f*(1) = 1, *f*(2) = 2. 1. *f*(0) = 0, *f*(1) = 2, *f*(2) = 1. 1. *f*(0) = *f*(1) = *f*(2) = 0. | 0 | [
{
"input": "3 2",
"output": "3"
},
{
"input": "5 4",
"output": "25"
},
{
"input": "7 2",
"output": "49"
},
{
"input": "7 6",
"output": "343"
},
{
"input": "10007 25",
"output": "100140049"
},
{
"input": "40037 4",
"output": "602961362"
},
{
... | 1,459,870,210 | 6,910 | Python 3 | WRONG_ANSWER | TESTS | 3 | 61 | 4,608,000 | MOD = 10**9+7
p,k = map(int,input().split())
bool = False
for i in range(1,p):
if (i**2-k) % p == 0:
bool = True
break
if bool:
print((p*p)%MOD)
else:
print(p) | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
As behooves any intelligent schoolboy, Kevin Sun is studying psycowlogy, cowculus, and cryptcowgraphy at the Bovinia State University (BGU) under Farmer Ivan. During his Mathematics of Olympiads (MoO) class, Kevin was confronted w... | ```python
MOD = 10**9+7
p,k = map(int,input().split())
bool = False
for i in range(1,p):
if (i**2-k) % p == 0:
bool = True
break
if bool:
print((p*p)%MOD)
else:
print(p)
``` | 0 | |
289 | B | Polo the Penguin and Matrix | PROGRAMMING | 1,400 | [
"brute force",
"dp",
"implementation",
"sortings",
"ternary search"
] | null | null | Little penguin Polo has an *n*<=×<=*m* matrix, consisting of integers. Let's index the matrix rows from 1 to *n* from top to bottom and let's index the columns from 1 to *m* from left to right. Let's represent the matrix element on the intersection of row *i* and column *j* as *a**ij*.
In one move the penguin can add ... | The first line contains three integers *n*, *m* and *d* (1<=≤<=*n*,<=*m*<=≤<=100,<=1<=≤<=*d*<=≤<=104) — the matrix sizes and the *d* parameter. Next *n* lines contain the matrix: the *j*-th integer in the *i*-th row is the matrix element *a**ij* (1<=≤<=*a**ij*<=≤<=104). | In a single line print a single integer — the minimum number of moves the penguin needs to make all matrix elements equal. If that is impossible, print "-1" (without the quotes). | [
"2 2 2\n2 4\n6 8\n",
"1 2 7\n6 7\n"
] | [
"4\n",
"-1\n"
] | none | 1,000 | [
{
"input": "2 2 2\n2 4\n6 8",
"output": "4"
},
{
"input": "1 2 7\n6 7",
"output": "-1"
},
{
"input": "3 2 1\n5 7\n1 2\n5 100",
"output": "104"
},
{
"input": "3 3 3\n5 8 5\n11 11 17\n14 5 2",
"output": "12"
},
{
"input": "3 3 3\n5 8 5\n11 11 17\n14 5 3",
"outpu... | 1,611,785,368 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 3 | 186 | 0 | n, m, d = map(int, input().split())
l = []
for _ in range(n):
l += list(map(int, input().split()))
la = [i % d for i in l]
if la.count(0) == n*m:
l.sort()
mid = (n*m)//2
ans = 0
for i in l:
ans += abs(i - l[mid])
print(ans//d)
else:
print(-1)
| Title: Polo the Penguin and Matrix
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little penguin Polo has an *n*<=×<=*m* matrix, consisting of integers. Let's index the matrix rows from 1 to *n* from top to bottom and let's index the columns from 1 to *m* from left to right. Let's represe... | ```python
n, m, d = map(int, input().split())
l = []
for _ in range(n):
l += list(map(int, input().split()))
la = [i % d for i in l]
if la.count(0) == n*m:
l.sort()
mid = (n*m)//2
ans = 0
for i in l:
ans += abs(i - l[mid])
print(ans//d)
else:
print(-1)
``` | 0 | |
124 | A | The number of positions | PROGRAMMING | 1,000 | [
"math"
] | null | null | Petr stands in line of *n* people, but he doesn't know exactly which position he occupies. He can say that there are no less than *a* people standing in front of him and no more than *b* people standing behind him. Find the number of different positions Petr can occupy. | The only line contains three integers *n*, *a* and *b* (0<=≤<=*a*,<=*b*<=<<=*n*<=≤<=100). | Print the single number — the number of the sought positions. | [
"3 1 1\n",
"5 2 3\n"
] | [
"2\n",
"3\n"
] | The possible positions in the first sample are: 2 and 3 (if we number the positions starting with 1).
In the second sample they are 3, 4 and 5. | 500 | [
{
"input": "3 1 1",
"output": "2"
},
{
"input": "5 2 3",
"output": "3"
},
{
"input": "5 4 0",
"output": "1"
},
{
"input": "6 5 5",
"output": "1"
},
{
"input": "9 4 3",
"output": "4"
},
{
"input": "11 4 6",
"output": "7"
},
{
"input": "13 8 ... | 1,680,435,046 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 4 | 154 | 0 | n,a,b=map(int,input().split())
if b==0:
print("1")
elif a==0:
print(n)
else:
print(n-min(a,b))
| Title: The number of positions
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Petr stands in line of *n* people, but he doesn't know exactly which position he occupies. He can say that there are no less than *a* people standing in front of him and no more than *b* people standing behind h... | ```python
n,a,b=map(int,input().split())
if b==0:
print("1")
elif a==0:
print(n)
else:
print(n-min(a,b))
``` | 0 | |
556 | A | Case of the Zeros and Ones | PROGRAMMING | 900 | [
"greedy"
] | null | null | Andrewid the Android is a galaxy-famous detective. In his free time he likes to think about strings containing zeros and ones.
Once he thought about a string of length *n* consisting of zeroes and ones. Consider the following operation: we choose any two adjacent positions in the string, and if one them contains 0, an... | First line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=2·105), the length of the string that Andreid has.
The second line contains the string of length *n* consisting only from zeros and ones. | Output the minimum length of the string that may remain after applying the described operations several times. | [
"4\n1100\n",
"5\n01010\n",
"8\n11101111\n"
] | [
"0\n",
"1\n",
"6\n"
] | In the first sample test it is possible to change the string like the following: <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/10df55364c21c6e8d5da31b6ab6f6294c4fc26b3.png" style="max-width: 100.0%;max-height: 100.0%;"/>.
In the second sample test it is possible to change the string like... | 250 | [
{
"input": "4\n1100",
"output": "0"
},
{
"input": "5\n01010",
"output": "1"
},
{
"input": "8\n11101111",
"output": "6"
},
{
"input": "1\n0",
"output": "1"
},
{
"input": "1\n1",
"output": "1"
},
{
"input": "2\n00",
"output": "2"
},
{
"input"... | 1,695,557,064 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 0 | 46 | 0 | from sys import stdin
from math import ceil, floor
input = stdin.readline
n = int(input())
s = input()
a1, a0 = 0, 0
for i in s:
if i == "1":
a1 += 1
else:
a0 += 1
# print(a0, a1)
if a1 == a0:
print(0)
else:
print(abs(a1 - a0)) | Title: Case of the Zeros and Ones
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Andrewid the Android is a galaxy-famous detective. In his free time he likes to think about strings containing zeros and ones.
Once he thought about a string of length *n* consisting of zeroes and ones. Cons... | ```python
from sys import stdin
from math import ceil, floor
input = stdin.readline
n = int(input())
s = input()
a1, a0 = 0, 0
for i in s:
if i == "1":
a1 += 1
else:
a0 += 1
# print(a0, a1)
if a1 == a0:
print(0)
else:
print(abs(a1 - a0))
``` | 0 | |
368 | B | Sereja and Suffixes | PROGRAMMING | 1,100 | [
"data structures",
"dp"
] | null | null | Sereja has an array *a*, consisting of *n* integers *a*1, *a*2, ..., *a**n*. The boy cannot sit and do nothing, he decided to study an array. Sereja took a piece of paper and wrote out *m* integers *l*1,<=*l*2,<=...,<=*l**m* (1<=≤<=*l**i*<=≤<=*n*). For each number *l**i* he wants to know how many distinct numbers are s... | The first line contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=105). The second line contains *n* integers *a*1, *a*2, ..., *a**n* (1<=≤<=*a**i*<=≤<=105) — the array elements.
Next *m* lines contain integers *l*1,<=*l*2,<=...,<=*l**m*. The *i*-th line contains integer *l**i* (1<=≤<=*l**i*<=≤<=*n*). | Print *m* lines — on the *i*-th line print the answer to the number *l**i*. | [
"10 10\n1 2 3 4 1 2 3 4 100000 99999\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n"
] | [
"6\n6\n6\n6\n6\n5\n4\n3\n2\n1\n"
] | none | 1,000 | [
{
"input": "10 10\n1 2 3 4 1 2 3 4 100000 99999\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10",
"output": "6\n6\n6\n6\n6\n5\n4\n3\n2\n1"
},
{
"input": "8 3\n8 6 4 3 4 2 4 8\n6\n4\n2",
"output": "3\n4\n5"
},
{
"input": "7 10\n1 3 8 6 2 2 7\n4\n2\n6\n3\n4\n4\n6\n2\n7\n4",
"output": "3\n5\n2\n4\n3\n3\... | 1,668,508,708 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 15 | 0 | n = int(input())
xi = list(map(int,input().split()))
q = int(input())
li = []
mxi = max(xi)
for i in range(mxi):
li.append(0)
for i in range(n):
for j in range(xi[i]-1,mxi):
li[j]+=1
for i in range(q):
inp = int(input())
if inp >= mxi:
print(n)
else:
print(li... | Title: Sereja and Suffixes
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Sereja has an array *a*, consisting of *n* integers *a*1, *a*2, ..., *a**n*. The boy cannot sit and do nothing, he decided to study an array. Sereja took a piece of paper and wrote out *m* integers *l*1,<=*l*2,<=...... | ```python
n = int(input())
xi = list(map(int,input().split()))
q = int(input())
li = []
mxi = max(xi)
for i in range(mxi):
li.append(0)
for i in range(n):
for j in range(xi[i]-1,mxi):
li[j]+=1
for i in range(q):
inp = int(input())
if inp >= mxi:
print(n)
else:
... | -1 | |
765 | B | Code obfuscation | PROGRAMMING | 1,100 | [
"greedy",
"implementation",
"strings"
] | null | null | Kostya likes Codeforces contests very much. However, he is very disappointed that his solutions are frequently hacked. That's why he decided to obfuscate (intentionally make less readable) his code before upcoming contest.
To obfuscate the code, Kostya first looks at the first variable name used in his program and rep... | In the only line of input there is a string *S* of lowercase English letters (1<=≤<=|*S*|<=≤<=500) — the identifiers of a program with removed whitespace characters. | If this program can be a result of Kostya's obfuscation, print "YES" (without quotes), otherwise print "NO". | [
"abacaba\n",
"jinotega\n"
] | [
"YES\n",
"NO\n"
] | In the first sample case, one possible list of identifiers would be "number string number character number string number". Here how Kostya would obfuscate the program:
- replace all occurences of number with a, the result would be "a string a character a string a",- replace all occurences of string with b, the result... | 1,000 | [
{
"input": "abacaba",
"output": "YES"
},
{
"input": "jinotega",
"output": "NO"
},
{
"input": "aaaaaaaaaaa",
"output": "YES"
},
{
"input": "aba",
"output": "YES"
},
{
"input": "bab",
"output": "NO"
},
{
"input": "a",
"output": "YES"
},
{
"in... | 1,487,066,171 | 6,671 | Python 3 | WRONG_ANSWER | PRETESTS | 4 | 62 | 4,608,000 | inp = input()
alpha = "abcdefghijklmnopqrstuvwxyz"
yes = True
done = False
pos = 0
for char in inp:
if char == alpha[pos]:
continue
elif char == alpha[pos+1]:
continue
elif not done:
done = True
continue
else:
yes = False
break
if yes:
print("YES")
else:
print("NO") | Title: Code obfuscation
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Kostya likes Codeforces contests very much. However, he is very disappointed that his solutions are frequently hacked. That's why he decided to obfuscate (intentionally make less readable) his code before upcoming cont... | ```python
inp = input()
alpha = "abcdefghijklmnopqrstuvwxyz"
yes = True
done = False
pos = 0
for char in inp:
if char == alpha[pos]:
continue
elif char == alpha[pos+1]:
continue
elif not done:
done = True
continue
else:
yes = False
break
if yes:
print("YES")
else:
print("NO")
``... | 0 | |
653 | A | Bear and Three Balls | PROGRAMMING | 900 | [
"brute force",
"implementation",
"sortings"
] | null | null | Limak is a little polar bear. He has *n* balls, the *i*-th ball has size *t**i*.
Limak wants to give one ball to each of his three friends. Giving gifts isn't easy — there are two rules Limak must obey to make friends happy:
- No two friends can get balls of the same size. - No two friends can get balls of sizes th... | The first line of the input contains one integer *n* (3<=≤<=*n*<=≤<=50) — the number of balls Limak has.
The second line contains *n* integers *t*1,<=*t*2,<=...,<=*t**n* (1<=≤<=*t**i*<=≤<=1000) where *t**i* denotes the size of the *i*-th ball. | Print "YES" (without quotes) if Limak can choose three balls of distinct sizes, such that any two of them differ by no more than 2. Otherwise, print "NO" (without quotes). | [
"4\n18 55 16 17\n",
"6\n40 41 43 44 44 44\n",
"8\n5 972 3 4 1 4 970 971\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | In the first sample, there are 4 balls and Limak is able to choose three of them to satisfy the rules. He must must choose balls with sizes 18, 16 and 17.
In the second sample, there is no way to give gifts to three friends without breaking the rules.
In the third sample, there is even more than one way to choose bal... | 500 | [
{
"input": "4\n18 55 16 17",
"output": "YES"
},
{
"input": "6\n40 41 43 44 44 44",
"output": "NO"
},
{
"input": "8\n5 972 3 4 1 4 970 971",
"output": "YES"
},
{
"input": "3\n959 747 656",
"output": "NO"
},
{
"input": "4\n1 2 2 3",
"output": "YES"
},
{
... | 1,459,032,355 | 2,147,483,647 | Python 3 | OK | TESTS | 84 | 77 | 5,120,000 | input()
balls = sorted(set(int(ball) for ball in input().split()))
answer = "NO"
balls_number = len(balls)
if balls_number > 2:
for i in range(balls_number - 2):
if balls[i + 1] - balls[i] <= 2 and balls[i + 2] - balls[i + 1] <= 2 and balls[i + 2] - balls[i] <= 2:
answer = "Yes"
... | Title: Bear and Three Balls
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Limak is a little polar bear. He has *n* balls, the *i*-th ball has size *t**i*.
Limak wants to give one ball to each of his three friends. Giving gifts isn't easy — there are two rules Limak must obey to make fri... | ```python
input()
balls = sorted(set(int(ball) for ball in input().split()))
answer = "NO"
balls_number = len(balls)
if balls_number > 2:
for i in range(balls_number - 2):
if balls[i + 1] - balls[i] <= 2 and balls[i + 2] - balls[i + 1] <= 2 and balls[i + 2] - balls[i] <= 2:
answer = "Yes"... | 3 | |
202 | A | LLPS | PROGRAMMING | 800 | [
"binary search",
"bitmasks",
"brute force",
"greedy",
"implementation",
"strings"
] | null | null | This problem's actual name, "Lexicographically Largest Palindromic Subsequence" is too long to fit into the page headline.
You are given string *s* consisting of lowercase English letters only. Find its lexicographically largest palindromic subsequence.
We'll call a non-empty string *s*[*p*1*p*2... *p**k*] = *s**p*1*... | The only input line contains a non-empty string *s* consisting of lowercase English letters only. Its length does not exceed 10. | Print the lexicographically largest palindromic subsequence of string *s*. | [
"radar\n",
"bowwowwow\n",
"codeforces\n",
"mississipp\n"
] | [
"rr\n",
"wwwww\n",
"s\n",
"ssss\n"
] | Among all distinct subsequences of string "radar" the following ones are palindromes: "a", "d", "r", "aa", "rr", "ada", "rar", "rdr", "raar" and "radar". The lexicographically largest of them is "rr". | 500 | [
{
"input": "radar",
"output": "rr"
},
{
"input": "bowwowwow",
"output": "wwwww"
},
{
"input": "codeforces",
"output": "s"
},
{
"input": "mississipp",
"output": "ssss"
},
{
"input": "tourist",
"output": "u"
},
{
"input": "romka",
"output": "r"
},
... | 1,618,042,452 | 2,147,483,647 | Python 3 | OK | TESTS | 54 | 124 | 0 | word = input()
asc_word = ''.join(sorted(word))
i = len(word)-1
ch = asc_word[-1]
while asc_word[i] == ch and i>=0:
i-=1
print(asc_word[i+1:]) | Title: LLPS
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
This problem's actual name, "Lexicographically Largest Palindromic Subsequence" is too long to fit into the page headline.
You are given string *s* consisting of lowercase English letters only. Find its lexicographically largest ... | ```python
word = input()
asc_word = ''.join(sorted(word))
i = len(word)-1
ch = asc_word[-1]
while asc_word[i] == ch and i>=0:
i-=1
print(asc_word[i+1:])
``` | 3 | |
572 | B | Order Book | PROGRAMMING | 1,300 | [
"data structures",
"greedy",
"implementation",
"sortings"
] | null | null | In this task you need to process a set of stock exchange orders and use them to create order book.
An order is an instruction of some participant to buy or sell stocks on stock exchange. The order number *i* has price *p**i*, direction *d**i* — buy or sell, and integer *q**i*. This means that the participant is ready ... | The input starts with two positive integers *n* and *s* (1<=≤<=*n*<=≤<=1000,<=1<=≤<=*s*<=≤<=50), the number of orders and the book depth.
Next *n* lines contains a letter *d**i* (either 'B' or 'S'), an integer *p**i* (0<=≤<=*p**i*<=≤<=105) and an integer *q**i* (1<=≤<=*q**i*<=≤<=104) — direction, price and volume resp... | Print no more than 2*s* lines with aggregated orders from order book of depth *s*. The output format for orders should be the same as in input. | [
"6 2\nB 10 3\nS 50 2\nS 40 1\nS 50 6\nB 20 4\nB 25 10\n"
] | [
"S 50 8\nS 40 1\nB 25 10\nB 20 4\n"
] | Denote (x, y) an order with price *x* and volume *y*. There are 3 aggregated buy orders (10, 3), (20, 4), (25, 10) and two sell orders (50, 8), (40, 1) in the sample.
You need to print no more than two best orders for each direction, so you shouldn't print the order (10 3) having the worst price among buy orders. | 1,000 | [
{
"input": "6 2\nB 10 3\nS 50 2\nS 40 1\nS 50 6\nB 20 4\nB 25 10",
"output": "S 50 8\nS 40 1\nB 25 10\nB 20 4"
},
{
"input": "2 1\nB 7523 5589\nS 69799 1711",
"output": "S 69799 1711\nB 7523 5589"
},
{
"input": "1 1\nB 48259 991",
"output": "B 48259 991"
},
{
"input": "1 50\n... | 1,593,239,190 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 93 | 6,963,200 | n, s = map(int, input().split())
buys, sells = {}, {}
for i in range(n):
line = input().split()
d = line[0]
p = int(line[1])
v = int(line[2])
if d == 'B':
if p in buys:
buys[p] += v
else:
buys[p] = v
else:
if p in sells:
... | Title: Order Book
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
In this task you need to process a set of stock exchange orders and use them to create order book.
An order is an instruction of some participant to buy or sell stocks on stock exchange. The order number *i* has price *p**i... | ```python
n, s = map(int, input().split())
buys, sells = {}, {}
for i in range(n):
line = input().split()
d = line[0]
p = int(line[1])
v = int(line[2])
if d == 'B':
if p in buys:
buys[p] += v
else:
buys[p] = v
else:
if p in sells... | 0 | |
0 | none | none | none | 0 | [
"none"
] | null | null | First-rate specialists graduate from Berland State Institute of Peace and Friendship. You are one of the most talented students in this university. The education is not easy because you need to have fundamental knowledge in different areas, which sometimes are not related to each other.
For example, you should know l... | The only line contains a string *s* (5<=≤<=|*s*|<=≤<=104) consisting of lowercase English letters. | On the first line print integer *k* — a number of distinct possible suffixes. On the next *k* lines print suffixes.
Print suffixes in lexicographical (alphabetical) order. | [
"abacabaca\n",
"abaca\n"
] | [
"3\naca\nba\nca\n",
"0\n"
] | The first test was analysed in the problem statement.
In the second example the length of the string equals 5. The length of the root equals 5, so no string can be used as a suffix. | 0 | [
{
"input": "abacabaca",
"output": "3\naca\nba\nca"
},
{
"input": "abaca",
"output": "0"
},
{
"input": "gzqgchv",
"output": "1\nhv"
},
{
"input": "iosdwvzerqfi",
"output": "9\ner\nerq\nfi\nqfi\nrq\nvz\nvze\nze\nzer"
},
{
"input": "oawtxikrpvfuzugjweki",
"output... | 1,461,950,026 | 2,326 | PyPy 3 | TIME_LIMIT_EXCEEDED | PRETESTS | 13 | 1,000 | 41,779,200 | import sys
import math
import itertools as it
import operator as op
import fractions as fr
s = sys.stdin.readline().strip()
to_exam = set([(s,'')])
suff = set()
while to_exam:
t,ls = to_exam.pop()
if len(t) >= 5 + 2 and ls != t[-2:]:
to_exam.update([(t[:-2], t[-2:])])
suff.update([t[-2:]])
if len(t)... | Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
First-rate specialists graduate from Berland State Institute of Peace and Friendship. You are one of the most talented students in this university. The education is not easy because you need to have fundamental knowledge in differ... | ```python
import sys
import math
import itertools as it
import operator as op
import fractions as fr
s = sys.stdin.readline().strip()
to_exam = set([(s,'')])
suff = set()
while to_exam:
t,ls = to_exam.pop()
if len(t) >= 5 + 2 and ls != t[-2:]:
to_exam.update([(t[:-2], t[-2:])])
suff.update([t[-2:]])
... | 0 | |
155 | A | I_love_\%username\% | PROGRAMMING | 800 | [
"brute force"
] | null | null | Vasya adores sport programming. He can't write programs but he loves to watch the contests' progress. Vasya even has a favorite coder and Vasya pays special attention to him.
One day Vasya decided to collect the results of all contests where his favorite coder participated and track the progress of his coolness. For e... | The first line contains the single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of contests where the coder participated.
The next line contains *n* space-separated non-negative integer numbers — they are the points which the coder has earned. The points are given in the chronological order. All points do not exceed ... | Print the single number — the number of amazing performances the coder has had during his whole history of participating in the contests. | [
"5\n100 50 200 150 200\n",
"10\n4664 6496 5814 7010 5762 5736 6944 4850 3698 7242\n"
] | [
"2\n",
"4\n"
] | In the first sample the performances number 2 and 3 are amazing.
In the second sample the performances number 2, 4, 9 and 10 are amazing. | 500 | [
{
"input": "5\n100 50 200 150 200",
"output": "2"
},
{
"input": "10\n4664 6496 5814 7010 5762 5736 6944 4850 3698 7242",
"output": "4"
},
{
"input": "1\n6",
"output": "0"
},
{
"input": "2\n2 1",
"output": "1"
},
{
"input": "5\n100 36 53 7 81",
"output": "2"
... | 1,683,119,608 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 0 | 92 | 0 | _ = input()
string_list = list(map(int,input().split()))
print(string_list)
min, max = string_list[0], string_list[0]
amazing_count = 0
for i in range(1,len(string_list)):
if string_list[i] > max:
max = string_list[i]
amazing_count += 1
elif string_list[i] < min:
min = string_list[i]
... | Title: I_love_\%username\%
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya adores sport programming. He can't write programs but he loves to watch the contests' progress. Vasya even has a favorite coder and Vasya pays special attention to him.
One day Vasya decided to collect the re... | ```python
_ = input()
string_list = list(map(int,input().split()))
print(string_list)
min, max = string_list[0], string_list[0]
amazing_count = 0
for i in range(1,len(string_list)):
if string_list[i] > max:
max = string_list[i]
amazing_count += 1
elif string_list[i] < min:
min = string_lis... | 0 | |
931 | B | World Cup | PROGRAMMING | 1,200 | [
"constructive algorithms",
"implementation"
] | null | null | The last stage of Football World Cup is played using the play-off system.
There are *n* teams left in this stage, they are enumerated from 1 to *n*. Several rounds are held, in each round the remaining teams are sorted in the order of their ids, then the first in this order plays with the second, the third — with the ... | The only line contains three integers *n*, *a* and *b* (2<=≤<=*n*<=≤<=256, 1<=≤<=*a*,<=*b*<=≤<=*n*) — the total number of teams, and the ids of the teams that Arkady is interested in.
It is guaranteed that *n* is such that in each round an even number of team advance, and that *a* and *b* are not equal. | In the only line print "Final!" (without quotes), if teams *a* and *b* can meet in the Final.
Otherwise, print a single integer — the number of the round in which teams *a* and *b* can meet. The round are enumerated from 1. | [
"4 1 2\n",
"8 2 6\n",
"8 7 5\n"
] | [
"1\n",
"Final!\n",
"2\n"
] | In the first example teams 1 and 2 meet in the first round.
In the second example teams 2 and 6 can only meet in the third round, which is the Final, if they win all their opponents in earlier rounds.
In the third example the teams with ids 7 and 5 can meet in the second round, if they win their opponents in the firs... | 1,000 | [
{
"input": "4 1 2",
"output": "1"
},
{
"input": "8 2 6",
"output": "Final!"
},
{
"input": "8 7 5",
"output": "2"
},
{
"input": "128 30 98",
"output": "Final!"
},
{
"input": "256 128 256",
"output": "Final!"
},
{
"input": "256 2 127",
"output": "7"
... | 1,520,180,904 | 3,204 | Python 3 | OK | TESTS | 64 | 77 | 5,632,000 | import math
x=list(map(int,input().split()))
m,a,b=x[0],x[1],x[2]
if a>b:
a,b=b,a
n=0
while b-a>1 or (a%2==0 and b%2>0):
a=int(math.ceil(a/2.0))
b=int(math.ceil(b/2.0))
n+=1
m//=2
if m <= 2:
print('Final!')
else:
print(n+1)
| Title: World Cup
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The last stage of Football World Cup is played using the play-off system.
There are *n* teams left in this stage, they are enumerated from 1 to *n*. Several rounds are held, in each round the remaining teams are sorted in th... | ```python
import math
x=list(map(int,input().split()))
m,a,b=x[0],x[1],x[2]
if a>b:
a,b=b,a
n=0
while b-a>1 or (a%2==0 and b%2>0):
a=int(math.ceil(a/2.0))
b=int(math.ceil(b/2.0))
n+=1
m//=2
if m <= 2:
print('Final!')
else:
print(n+1)
``` | 3 | |
9 | A | Die Roll | PROGRAMMING | 800 | [
"math",
"probabilities"
] | A. Die Roll | 1 | 64 | Yakko, Wakko and Dot, world-famous animaniacs, decided to rest from acting in cartoons, and take a leave to travel a bit. Yakko dreamt to go to Pennsylvania, his Motherland and the Motherland of his ancestors. Wakko thought about Tasmania, its beaches, sun and sea. Dot chose Transylvania as the most mysterious and unpr... | The only line of the input file contains two natural numbers Y and W — the results of Yakko's and Wakko's die rolls. | Output the required probability in the form of irreducible fraction in format «A/B», where A — the numerator, and B — the denominator. If the required probability equals to zero, output «0/1». If the required probability equals to 1, output «1/1». | [
"4 2\n"
] | [
"1/2\n"
] | Dot will go to Transylvania, if she is lucky to roll 4, 5 or 6 points. | 0 | [
{
"input": "4 2",
"output": "1/2"
},
{
"input": "1 1",
"output": "1/1"
},
{
"input": "1 2",
"output": "5/6"
},
{
"input": "1 3",
"output": "2/3"
},
{
"input": "1 4",
"output": "1/2"
},
{
"input": "1 5",
"output": "1/3"
},
{
"input": "1 6",
... | 1,612,434,105 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 122 | 0 | a,b = [int(x) for x in input().split()]
c=max(a,b)
chance = 6-c+1
if chance%2==0:
print(str(chance//2)+'/'+str(3))
elif chance%3==0:
print(str(chance//3)+'/'+str(2))
else:
print(str(chance)+'/'+str(6))
| Title: Die Roll
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
Yakko, Wakko and Dot, world-famous animaniacs, decided to rest from acting in cartoons, and take a leave to travel a bit. Yakko dreamt to go to Pennsylvania, his Motherland and the Motherland of his ancestors. Wakko thought about T... | ```python
a,b = [int(x) for x in input().split()]
c=max(a,b)
chance = 6-c+1
if chance%2==0:
print(str(chance//2)+'/'+str(3))
elif chance%3==0:
print(str(chance//3)+'/'+str(2))
else:
print(str(chance)+'/'+str(6))
``` | 0 |
507 | A | Amr and Music | PROGRAMMING | 1,000 | [
"greedy",
"implementation",
"sortings"
] | null | null | Amr is a young coder who likes music a lot. He always wanted to learn how to play music but he was busy coding so he got an idea.
Amr has *n* instruments, it takes *a**i* days to learn *i*-th instrument. Being busy, Amr dedicated *k* days to learn how to play the maximum possible number of instruments.
Amr asked for ... | The first line contains two numbers *n*, *k* (1<=≤<=*n*<=≤<=100, 0<=≤<=*k*<=≤<=10<=000), the number of instruments and number of days respectively.
The second line contains *n* integers *a**i* (1<=≤<=*a**i*<=≤<=100), representing number of days required to learn the *i*-th instrument. | In the first line output one integer *m* representing the maximum number of instruments Amr can learn.
In the second line output *m* space-separated integers: the indices of instruments to be learnt. You may output indices in any order.
if there are multiple optimal solutions output any. It is not necessary to use al... | [
"4 10\n4 3 1 2\n",
"5 6\n4 3 1 1 2\n",
"1 3\n4\n"
] | [
"4\n1 2 3 4",
"3\n1 3 4",
"0\n"
] | In the first test Amr can learn all 4 instruments.
In the second test other possible solutions are: {2, 3, 5} or {3, 4, 5}.
In the third test Amr doesn't have enough time to learn the only presented instrument. | 500 | [
{
"input": "4 10\n4 3 1 2",
"output": "4\n1 2 3 4"
},
{
"input": "5 6\n4 3 1 1 2",
"output": "3\n3 4 5"
},
{
"input": "1 3\n4",
"output": "0"
},
{
"input": "2 100\n100 100",
"output": "1\n1"
},
{
"input": "3 150\n50 50 50",
"output": "3\n1 2 3"
},
{
"i... | 1,582,310,093 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 1 | 124 | 0 | n,k=map(int,input().split())
a=list(map(int,input().split()))
l,c=[],0
for i in a :
if k<=0 :
break
else :
l.append(i)
c+=1
k-=i
print(c)
print(*l,end=" ") | Title: Amr and Music
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Amr is a young coder who likes music a lot. He always wanted to learn how to play music but he was busy coding so he got an idea.
Amr has *n* instruments, it takes *a**i* days to learn *i*-th instrument. Being busy, Amr ... | ```python
n,k=map(int,input().split())
a=list(map(int,input().split()))
l,c=[],0
for i in a :
if k<=0 :
break
else :
l.append(i)
c+=1
k-=i
print(c)
print(*l,end=" ")
``` | 0 | |
282 | A | Bit++ | PROGRAMMING | 800 | [
"implementation"
] | null | null | The classic programming language of Bitland is Bit++. This language is so peculiar and complicated.
The language is that peculiar as it has exactly one variable, called *x*. Also, there are two operations:
- Operation ++ increases the value of variable *x* by 1. - Operation -- decreases the value of variable *x* by... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=150) — the number of statements in the programme.
Next *n* lines contain a statement each. Each statement contains exactly one operation (++ or --) and exactly one variable *x* (denoted as letter «X»). Thus, there are no empty statements. The operation and th... | Print a single integer — the final value of *x*. | [
"1\n++X\n",
"2\nX++\n--X\n"
] | [
"1\n",
"0\n"
] | none | 500 | [
{
"input": "1\n++X",
"output": "1"
},
{
"input": "2\nX++\n--X",
"output": "0"
},
{
"input": "3\n++X\n++X\n++X",
"output": "3"
},
{
"input": "2\n--X\n--X",
"output": "-2"
},
{
"input": "5\n++X\n--X\n++X\n--X\n--X",
"output": "-1"
},
{
"input": "28\nX--\... | 1,697,450,908 | 2,147,483,647 | Python 3 | OK | TESTS | 36 | 46 | 0 | n = int(input())
x = 0
for i in range(n):
operation = input()
if operation == '++X' or operation == 'X++':
x += 1
elif operation == '--X' or operation == 'X--':
x -= 1
print(x) | Title: Bit++
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The classic programming language of Bitland is Bit++. This language is so peculiar and complicated.
The language is that peculiar as it has exactly one variable, called *x*. Also, there are two operations:
- Operation ++ incre... | ```python
n = int(input())
x = 0
for i in range(n):
operation = input()
if operation == '++X' or operation == 'X++':
x += 1
elif operation == '--X' or operation == 'X--':
x -= 1
print(x)
``` | 3 | |
534 | A | Exam | PROGRAMMING | 1,100 | [
"constructive algorithms",
"implementation",
"math"
] | null | null | An exam for *n* students will take place in a long and narrow room, so the students will sit in a line in some order. The teacher suspects that students with adjacent numbers (*i* and *i*<=+<=1) always studied side by side and became friends and if they take an exam sitting next to each other, they will help each other... | A single line contains integer *n* (1<=≤<=*n*<=≤<=5000) — the number of students at an exam. | In the first line print integer *k* — the maximum number of students who can be seated so that no two students with adjacent numbers sit next to each other.
In the second line print *k* distinct integers *a*1,<=*a*2,<=...,<=*a**k* (1<=≤<=*a**i*<=≤<=*n*), where *a**i* is the number of the student on the *i*-th position... | [
"6",
"3\n"
] | [
"6\n1 5 3 6 2 4",
"2\n1 3"
] | none | 500 | [
{
"input": "6",
"output": "6\n5 3 1 6 4 2 "
},
{
"input": "3",
"output": "2\n1 3"
},
{
"input": "1",
"output": "1\n1 "
},
{
"input": "2",
"output": "1\n1"
},
{
"input": "4",
"output": "4\n3 1 4 2 "
},
{
"input": "5",
"output": "5\n5 3 1 4 2 "
},
... | 1,561,125,041 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 78 | 0 | n=int(input())
T1= [str(i) for i in range(1, n+1) if i % 2 == 1]
T2=[str(i) for i in range(1, n+1) if i % 2 == 0]
t=0
R=T1+T2
#for i in range(1,len(R)):
#if len (R)%2==0
if len(R)==3:
print('1 2')
else:
print(' '.join(R))
| Title: Exam
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
An exam for *n* students will take place in a long and narrow room, so the students will sit in a line in some order. The teacher suspects that students with adjacent numbers (*i* and *i*<=+<=1) always studied side by side and bec... | ```python
n=int(input())
T1= [str(i) for i in range(1, n+1) if i % 2 == 1]
T2=[str(i) for i in range(1, n+1) if i % 2 == 0]
t=0
R=T1+T2
#for i in range(1,len(R)):
#if len (R)%2==0
if len(R)==3:
print('1 2')
else:
print(' '.join(R))
``` | 0 | |
237 | A | Free Cash | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | Valera runs a 24/7 fast food cafe. He magically learned that next day *n* people will visit his cafe. For each person we know the arrival time: the *i*-th person comes exactly at *h**i* hours *m**i* minutes. The cafe spends less than a minute to serve each client, but if a client comes in and sees that there is no free... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=105), that is the number of cafe visitors.
Each of the following *n* lines has two space-separated integers *h**i* and *m**i* (0<=≤<=*h**i*<=≤<=23; 0<=≤<=*m**i*<=≤<=59), representing the time when the *i*-th person comes into the cafe.
Note that the time is... | Print a single integer — the minimum number of cashes, needed to serve all clients next day. | [
"4\n8 0\n8 10\n8 10\n8 45\n",
"3\n0 12\n10 11\n22 22\n"
] | [
"2\n",
"1\n"
] | In the first sample it is not enough one cash to serve all clients, because two visitors will come into cafe in 8:10. Therefore, if there will be one cash in cafe, then one customer will be served by it, and another one will not wait and will go away.
In the second sample all visitors will come in different times, so ... | 500 | [
{
"input": "4\n8 0\n8 10\n8 10\n8 45",
"output": "2"
},
{
"input": "3\n0 12\n10 11\n22 22",
"output": "1"
},
{
"input": "5\n12 8\n15 27\n15 27\n16 2\n19 52",
"output": "2"
},
{
"input": "7\n5 6\n7 34\n7 34\n7 34\n12 29\n15 19\n20 23",
"output": "3"
},
{
"input": "... | 1,677,549,404 | 2,147,483,647 | Python 3 | OK | TESTS | 67 | 280 | 102,400 | from collections import Counter
print(max(Counter(input() for _ in range(int(input()))).values()))
#########################################
## ##
## Implemented by brownfox2k6 ##
## ##
######################################### | Title: Free Cash
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Valera runs a 24/7 fast food cafe. He magically learned that next day *n* people will visit his cafe. For each person we know the arrival time: the *i*-th person comes exactly at *h**i* hours *m**i* minutes. The cafe spends l... | ```python
from collections import Counter
print(max(Counter(input() for _ in range(int(input()))).values()))
#########################################
## ##
## Implemented by brownfox2k6 ##
## ##
#################################... | 3 | |
58 | A | Chat room | PROGRAMMING | 1,000 | [
"greedy",
"strings"
] | A. Chat room | 1 | 256 | Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letters can be deleted from the typed word so that it resulted in the word "hello". For example, ... | The first and only line contains the word *s*, which Vasya typed. This word consisits of small Latin letters, its length is no less that 1 and no more than 100 letters. | If Vasya managed to say hello, print "YES", otherwise print "NO". | [
"ahhellllloou\n",
"hlelo\n"
] | [
"YES\n",
"NO\n"
] | none | 500 | [
{
"input": "ahhellllloou",
"output": "YES"
},
{
"input": "hlelo",
"output": "NO"
},
{
"input": "helhcludoo",
"output": "YES"
},
{
"input": "hehwelloho",
"output": "YES"
},
{
"input": "pnnepelqomhhheollvlo",
"output": "YES"
},
{
"input": "tymbzjyqhymeda... | 1,647,747,684 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 46 | 0 | cadena = input()
s = "HOLA"
cont = 0
for i in s:
cont += 1 if cadena.__contains__(i.lower()) else 0
print("YES" if cont == len(s) else "NO")
| Title: Chat room
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letter... | ```python
cadena = input()
s = "HOLA"
cont = 0
for i in s:
cont += 1 if cadena.__contains__(i.lower()) else 0
print("YES" if cont == len(s) else "NO")
``` | 0 |
665 | B | Shopping | PROGRAMMING | 1,400 | [
"brute force"
] | null | null | Ayush is a cashier at the shopping center. Recently his department has started a ''click and collect" service which allows users to shop online.
The store contains *k* items. *n* customers have already used the above service. Each user paid for *m* items. Let *a**ij* denote the *j*-th item in the *i*-th person's orde... | The first line contains three integers *n*, *m* and *k* (1<=≤<=*n*,<=*k*<=≤<=100,<=1<=≤<=*m*<=≤<=*k*) — the number of users, the number of items each user wants to buy and the total number of items at the market.
The next line contains *k* distinct integers *p**l* (1<=≤<=*p**l*<=≤<=*k*) denoting the initial positions ... | Print the only integer *t* — the total time needed for Ayush to process all the orders. | [
"2 2 5\n3 4 1 2 5\n1 5\n3 1\n"
] | [
"14\n"
] | Customer 1 wants the items 1 and 5.
*pos*(1) = 3, so the new positions are: [1, 3, 4, 2, 5].
*pos*(5) = 5, so the new positions are: [5, 1, 3, 4, 2].
Time taken for the first customer is 3 + 5 = 8.
Customer 2 wants the items 3 and 1.
*pos*(3) = 3, so the new positions are: [3, 5, 1, 4, 2].
*pos*(1) = 3, so the ne... | 0 | [
{
"input": "2 2 5\n3 4 1 2 5\n1 5\n3 1",
"output": "14"
},
{
"input": "4 4 4\n1 2 3 4\n3 4 2 1\n4 3 2 1\n4 1 2 3\n4 1 2 3",
"output": "59"
},
{
"input": "1 1 1\n1\n1",
"output": "1"
},
{
"input": "10 1 100\n1 55 67 75 40 86 24 84 82 26 81 23 70 79 51 54 21 78 31 98 68 93 66 8... | 1,461,212,498 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 46 | 4,608,000 | [n,m,k]=[int(i) for i in input().split()]
a=[0]*(k+1)
temp=input()
for i in range(1,len(temp)+1):
a[int(temp[i])]=i
answer=0
for z in range(0,n):
for i in input().split():
answer+=a[int(i)]
a[int(i)]=1
for k in range(1,int(i)):
a[k]+=1
print(ans) | Title: Shopping
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Ayush is a cashier at the shopping center. Recently his department has started a ''click and collect" service which allows users to shop online.
The store contains *k* items. *n* customers have already used the above service... | ```python
[n,m,k]=[int(i) for i in input().split()]
a=[0]*(k+1)
temp=input()
for i in range(1,len(temp)+1):
a[int(temp[i])]=i
answer=0
for z in range(0,n):
for i in input().split():
answer+=a[int(i)]
a[int(i)]=1
for k in range(1,int(i)):
a[k]+=1
print(ans)
``` | -1 | |
507 | B | Amr and Pins | PROGRAMMING | 1,400 | [
"geometry",
"math"
] | null | null | Amr loves Geometry. One day he came up with a very interesting problem.
Amr has a circle of radius *r* and center in point (*x*,<=*y*). He wants the circle center to be in new position (*x*',<=*y*').
In one step Amr can put a pin to the border of the circle in a certain point, then rotate the circle around that pin b... | Input consists of 5 space-separated integers *r*, *x*, *y*, *x*' *y*' (1<=≤<=*r*<=≤<=105, <=-<=105<=≤<=*x*,<=*y*,<=*x*',<=*y*'<=≤<=105), circle radius, coordinates of original center of the circle and coordinates of destination center of the circle respectively. | Output a single integer — minimum number of steps required to move the center of the circle to the destination point. | [
"2 0 0 0 4\n",
"1 1 1 4 4\n",
"4 5 6 5 6\n"
] | [
"1\n",
"3\n",
"0\n"
] | In the first sample test the optimal way is to put a pin at point (0, 2) and rotate the circle by 180 degrees counter-clockwise (or clockwise, no matter).
<img class="tex-graphics" src="https://espresso.codeforces.com/4e40fd4cc24a2050a0488aa131e6244369328039.png" style="max-width: 100.0%;max-height: 100.0%;"/> | 1,000 | [
{
"input": "2 0 0 0 4",
"output": "1"
},
{
"input": "1 1 1 4 4",
"output": "3"
},
{
"input": "4 5 6 5 6",
"output": "0"
},
{
"input": "10 20 0 40 0",
"output": "1"
},
{
"input": "9 20 0 40 0",
"output": "2"
},
{
"input": "5 -1 -6 -5 1",
"output": "... | 1,557,063,093 | 2,147,483,647 | Python 3 | OK | TESTS | 37 | 109 | 0 | eps = 1e-10
r, x1, y1, x2, y2 = map(int, input().split())
k = ((x1-x2) ** 2 + (y1-y2) ** 2) ** .5
r *= 2
print(int((k+r-eps) // r))
| Title: Amr and Pins
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Amr loves Geometry. One day he came up with a very interesting problem.
Amr has a circle of radius *r* and center in point (*x*,<=*y*). He wants the circle center to be in new position (*x*',<=*y*').
In one step Amr can ... | ```python
eps = 1e-10
r, x1, y1, x2, y2 = map(int, input().split())
k = ((x1-x2) ** 2 + (y1-y2) ** 2) ** .5
r *= 2
print(int((k+r-eps) // r))
``` | 3 | |
433 | A | Kitahara Haruki's Gift | PROGRAMMING | 1,100 | [
"brute force",
"implementation"
] | null | null | Kitahara Haruki has bought *n* apples for Touma Kazusa and Ogiso Setsuna. Now he wants to divide all the apples between the friends.
Each apple weights 100 grams or 200 grams. Of course Kitahara Haruki doesn't want to offend any of his friend. Therefore the total weight of the apples given to Touma Kazusa must be equa... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=100) — the number of apples. The second line contains *n* integers *w*1,<=*w*2,<=...,<=*w**n* (*w**i*<==<=100 or *w**i*<==<=200), where *w**i* is the weight of the *i*-th apple. | In a single line print "YES" (without the quotes) if it is possible to divide all the apples between his friends. Otherwise print "NO" (without the quotes). | [
"3\n100 200 100\n",
"4\n100 100 100 200\n"
] | [
"YES\n",
"NO\n"
] | In the first test sample Kitahara Haruki can give the first and the last apple to Ogiso Setsuna and the middle apple to Touma Kazusa. | 500 | [
{
"input": "3\n100 200 100",
"output": "YES"
},
{
"input": "4\n100 100 100 200",
"output": "NO"
},
{
"input": "1\n100",
"output": "NO"
},
{
"input": "1\n200",
"output": "NO"
},
{
"input": "2\n100 100",
"output": "YES"
},
{
"input": "2\n200 200",
"o... | 1,682,493,168 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 8 | 46 | 0 | n=int(input())
a=input().split()
b=[int(i) for i in a]
if sum(b)%2!=0:
print("NO")
else:
b.sort()
k=1
flag=False
c=sum(b)//2
while True:
if b[-k]>c:
break
else:
c=c-b[-k]
if c==0:
flag=True
break... | Title: Kitahara Haruki's Gift
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Kitahara Haruki has bought *n* apples for Touma Kazusa and Ogiso Setsuna. Now he wants to divide all the apples between the friends.
Each apple weights 100 grams or 200 grams. Of course Kitahara Haruki doesn't w... | ```python
n=int(input())
a=input().split()
b=[int(i) for i in a]
if sum(b)%2!=0:
print("NO")
else:
b.sort()
k=1
flag=False
c=sum(b)//2
while True:
if b[-k]>c:
break
else:
c=c-b[-k]
if c==0:
flag=True
... | 0 | |
225 | C | Barcode | PROGRAMMING | 1,700 | [
"dp",
"matrices"
] | null | null | You've got an *n*<=×<=*m* pixel picture. Each pixel can be white or black. Your task is to change the colors of as few pixels as possible to obtain a barcode picture.
A picture is a barcode if the following conditions are fulfilled:
- All pixels in each column are of the same color. - The width of each monochrome ... | The first line contains four space-separated integers *n*, *m*, *x* and *y* (1<=≤<=*n*,<=*m*,<=*x*,<=*y*<=≤<=1000; *x*<=≤<=*y*).
Then follow *n* lines, describing the original image. Each of these lines contains exactly *m* characters. Character "." represents a white pixel and "#" represents a black pixel. The pictur... | In the first line print the minimum number of pixels to repaint. It is guaranteed that the answer exists. | [
"6 5 1 2\n##.#.\n.###.\n###..\n#...#\n.##.#\n###..\n",
"2 5 1 1\n#####\n.....\n"
] | [
"11\n",
"5\n"
] | In the first test sample the picture after changing some colors can looks as follows:
In the second test sample the picture after changing some colors can looks as follows: | 1,500 | [
{
"input": "6 5 1 2\n##.#.\n.###.\n###..\n#...#\n.##.#\n###..",
"output": "11"
},
{
"input": "10 5 3 7\n.####\n###..\n##.##\n#..#.\n.#...\n#.##.\n.##..\n.#.##\n#.#..\n.#..#",
"output": "24"
},
{
"input": "6 3 1 4\n##.\n#..\n#..\n..#\n.#.\n#.#",
"output": "6"
},
{
"input": "5 ... | 1,676,397,817 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 2 | 92 | 0 | def main():
n, m, x, y = list(map(int, input().split()))
Grid = []
Hash_count = [0 for _ in range(m)]
for i in range(n):
Grid.append(input())
for i in range(m):
if Grid[-1][i] == '#':
Hash_count[i] += 1
cols = [(n - Hash_count[i], Hash_count[i]) f... | Title: Barcode
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You've got an *n*<=×<=*m* pixel picture. Each pixel can be white or black. Your task is to change the colors of as few pixels as possible to obtain a barcode picture.
A picture is a barcode if the following conditions are fulf... | ```python
def main():
n, m, x, y = list(map(int, input().split()))
Grid = []
Hash_count = [0 for _ in range(m)]
for i in range(n):
Grid.append(input())
for i in range(m):
if Grid[-1][i] == '#':
Hash_count[i] += 1
cols = [(n - Hash_count[i], Hash_c... | 0 | |
393 | A | Nineteen | PROGRAMMING | 0 | [] | null | null | Alice likes word "nineteen" very much. She has a string *s* and wants the string to contain as many such words as possible. For that reason she can rearrange the letters of the string.
For example, if she has string "xiineteenppnnnewtnee", she can get string "xnineteenppnineteenw", containing (the occurrences marked) ... | The first line contains a non-empty string *s*, consisting only of lowercase English letters. The length of string *s* doesn't exceed 100. | Print a single integer — the maximum number of "nineteen"s that she can get in her string. | [
"nniinneetteeeenn\n",
"nneteenabcnneteenabcnneteenabcnneteenabcnneteenabcii\n",
"nineteenineteen\n"
] | [
"2",
"2",
"2"
] | none | 500 | [
{
"input": "nniinneetteeeenn",
"output": "2"
},
{
"input": "nneteenabcnneteenabcnneteenabcnneteenabcnneteenabcii",
"output": "2"
},
{
"input": "nineteenineteen",
"output": "2"
},
{
"input": "nssemsnnsitjtihtthij",
"output": "0"
},
{
"input": "eehihnttehtherjsihihn... | 1,560,846,842 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 13 | 109 | 0 | s=input()
x=s.count('n')
if x>3:
print( min((s.count('n')+1)//3,s.count('i'),s.count('e')//3,s.count('t')))
else :
print( min(s.count('n')//3,s.count('i'),s.count('e')//3,s.count('t'))) | Title: Nineteen
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Alice likes word "nineteen" very much. She has a string *s* and wants the string to contain as many such words as possible. For that reason she can rearrange the letters of the string.
For example, if she has string "xiinetee... | ```python
s=input()
x=s.count('n')
if x>3:
print( min((s.count('n')+1)//3,s.count('i'),s.count('e')//3,s.count('t')))
else :
print( min(s.count('n')//3,s.count('i'),s.count('e')//3,s.count('t')))
``` | 0 | |
231 | A | Team | PROGRAMMING | 800 | [
"brute force",
"greedy"
] | null | null | One day three best friends Petya, Vasya and Tonya decided to form a team and take part in programming contests. Participants are usually offered several problems during programming contests. Long before the start the friends decided that they will implement a problem if at least two of them are sure about the solution.... | The first input line contains a single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of problems in the contest. Then *n* lines contain three integers each, each integer is either 0 or 1. If the first number in the line equals 1, then Petya is sure about the problem's solution, otherwise he isn't sure. The second numbe... | Print a single integer — the number of problems the friends will implement on the contest. | [
"3\n1 1 0\n1 1 1\n1 0 0\n",
"2\n1 0 0\n0 1 1\n"
] | [
"2\n",
"1\n"
] | In the first sample Petya and Vasya are sure that they know how to solve the first problem and all three of them know how to solve the second problem. That means that they will write solutions for these problems. Only Petya is sure about the solution for the third problem, but that isn't enough, so the friends won't ta... | 500 | [
{
"input": "3\n1 1 0\n1 1 1\n1 0 0",
"output": "2"
},
{
"input": "2\n1 0 0\n0 1 1",
"output": "1"
},
{
"input": "1\n1 0 0",
"output": "0"
},
{
"input": "2\n1 0 0\n1 1 1",
"output": "1"
},
{
"input": "5\n1 0 0\n0 1 0\n1 1 1\n0 0 1\n0 0 0",
"output": "1"
},
... | 1,699,865,735 | 2,147,483,647 | Python 3 | OK | TESTS | 21 | 92 | 0 | m=int(input())
result=0
for _ in range(m):
dic={0:0,1:0}
a,b,c=map(int,input().split(' '))
dic[a]=dic.get(a)+1
dic[b]=dic.get(b)+1
dic[c]=dic.get(c)+1
if dic[1]>=2:
result+=1
else:
continue
print(result) | Title: Team
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day three best friends Petya, Vasya and Tonya decided to form a team and take part in programming contests. Participants are usually offered several problems during programming contests. Long before the start the friends decid... | ```python
m=int(input())
result=0
for _ in range(m):
dic={0:0,1:0}
a,b,c=map(int,input().split(' '))
dic[a]=dic.get(a)+1
dic[b]=dic.get(b)+1
dic[c]=dic.get(c)+1
if dic[1]>=2:
result+=1
else:
continue
print(result)
``` | 3 | |
501 | B | Misha and Changing Handles | PROGRAMMING | 1,100 | [
"data structures",
"dsu",
"strings"
] | null | null | Misha hacked the Codeforces site. Then he decided to let all the users change their handles. A user can now change his handle any number of times. But each new handle must not be equal to any handle that is already used or that was used at some point.
Misha has a list of handle change requests. After completing the re... | The first line contains integer *q* (1<=≤<=*q*<=≤<=1000), the number of handle change requests.
Next *q* lines contain the descriptions of the requests, one per line.
Each query consists of two non-empty strings *old* and *new*, separated by a space. The strings consist of lowercase and uppercase Latin letters and di... | In the first line output the integer *n* — the number of users that changed their handles at least once.
In the next *n* lines print the mapping between the old and the new handles of the users. Each of them must contain two strings, *old* and *new*, separated by a space, meaning that before the user had handle *old*,... | [
"5\nMisha ILoveCodeforces\nVasya Petrov\nPetrov VasyaPetrov123\nILoveCodeforces MikeMirzayanov\nPetya Ivanov\n"
] | [
"3\nPetya Ivanov\nMisha MikeMirzayanov\nVasya VasyaPetrov123\n"
] | none | 500 | [
{
"input": "5\nMisha ILoveCodeforces\nVasya Petrov\nPetrov VasyaPetrov123\nILoveCodeforces MikeMirzayanov\nPetya Ivanov",
"output": "3\nPetya Ivanov\nMisha MikeMirzayanov\nVasya VasyaPetrov123"
},
{
"input": "1\nMisha Vasya",
"output": "1\nMisha Vasya"
},
{
"input": "10\na b\nb c\nc d\nd... | 1,529,241,716 | 2,147,483,647 | Python 3 | OK | TESTS | 49 | 109 | 102,400 | def get_key(d, value):
for k, v in d.items():
if v == value:
return k
n=int(input())
d={}
for i in range(n):
s1, s2 = input().split()
if s1 in d.values():
d[get_key(d,s1)] = s2
else:
d[s1] = s2
print(len(d))
for k, v in d.items():
print(k,v) | Title: Misha and Changing Handles
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Misha hacked the Codeforces site. Then he decided to let all the users change their handles. A user can now change his handle any number of times. But each new handle must not be equal to any handle that is a... | ```python
def get_key(d, value):
for k, v in d.items():
if v == value:
return k
n=int(input())
d={}
for i in range(n):
s1, s2 = input().split()
if s1 in d.values():
d[get_key(d,s1)] = s2
else:
d[s1] = s2
print(len(d))
for k, v in d.items():
print(k,v... | 3 | |
879 | B | Table Tennis | PROGRAMMING | 1,200 | [
"data structures",
"implementation"
] | null | null | *n* people are standing in a line to play table tennis. At first, the first two players in the line play a game. Then the loser goes to the end of the line, and the winner plays with the next person from the line, and so on. They play until someone wins *k* games in a row. This player becomes the winner.
For each of t... | The first line contains two integers: *n* and *k* (2<=≤<=*n*<=≤<=500, 2<=≤<=*k*<=≤<=1012) — the number of people and the number of wins.
The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=*n*) — powers of the player. It's guaranteed that this line contains a valid permutation, i.e. all ... | Output a single integer — power of the winner. | [
"2 2\n1 2\n",
"4 2\n3 1 2 4\n",
"6 2\n6 5 3 1 2 4\n",
"2 10000000000\n2 1\n"
] | [
"2 ",
"3 ",
"6 ",
"2\n"
] | Games in the second sample:
3 plays with 1. 3 wins. 1 goes to the end of the line.
3 plays with 2. 3 wins. He wins twice in a row. He becomes the winner. | 1,000 | [
{
"input": "2 2\n1 2",
"output": "2 "
},
{
"input": "4 2\n3 1 2 4",
"output": "3 "
},
{
"input": "6 2\n6 5 3 1 2 4",
"output": "6 "
},
{
"input": "2 10000000000\n2 1",
"output": "2"
},
{
"input": "4 4\n1 3 4 2",
"output": "4 "
},
{
"input": "2 21474836... | 1,538,834,673 | 4,173 | Python 3 | OK | TESTS | 43 | 109 | 0 | n, l = map(int, input().split())
v = list(map(int, input().split()))
occ = 0
max = v[0]
for i in range(1, n):
if max>v[i]:
occ+=1
else:
max = v[i]
occ = 1
if occ==l:
break
print(max) | Title: Table Tennis
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
*n* people are standing in a line to play table tennis. At first, the first two players in the line play a game. Then the loser goes to the end of the line, and the winner plays with the next person from the line, and so o... | ```python
n, l = map(int, input().split())
v = list(map(int, input().split()))
occ = 0
max = v[0]
for i in range(1, n):
if max>v[i]:
occ+=1
else:
max = v[i]
occ = 1
if occ==l:
break
print(max)
``` | 3 | |
948 | A | Protect Sheep | PROGRAMMING | 900 | [
"brute force",
"dfs and similar",
"graphs",
"implementation"
] | null | null | Bob is a farmer. He has a large pasture with many sheep. Recently, he has lost some of them due to wolf attacks. He thus decided to place some shepherd dogs in such a way that all his sheep are protected.
The pasture is a rectangle consisting of *R*<=×<=*C* cells. Each cell is either empty, contains a sheep, a wolf or... | First line contains two integers *R* (1<=≤<=*R*<=≤<=500) and *C* (1<=≤<=*C*<=≤<=500), denoting the number of rows and the numbers of columns respectively.
Each of the following *R* lines is a string consisting of exactly *C* characters, representing one row of the pasture. Here, 'S' means a sheep, 'W' a wolf and '.' a... | If it is impossible to protect all sheep, output a single line with the word "No".
Otherwise, output a line with the word "Yes". Then print *R* lines, representing the pasture after placing dogs. Again, 'S' means a sheep, 'W' a wolf, 'D' is a dog and '.' an empty space. You are not allowed to move, remove or add a she... | [
"6 6\n..S...\n..S.W.\n.S....\n..W...\n...W..\n......\n",
"1 2\nSW\n",
"5 5\n.S...\n...S.\nS....\n...S.\n.S...\n"
] | [
"Yes\n..SD..\n..SDW.\n.SD...\n.DW...\nDD.W..\n......\n",
"No\n",
"Yes\n.S...\n...S.\nS.D..\n...S.\n.S...\n"
] | In the first example, we can split the pasture into two halves, one containing wolves and one containing sheep. Note that the sheep at (2,1) is safe, as wolves cannot move diagonally.
In the second example, there are no empty spots to put dogs that would guard the lone sheep.
In the third example, there are no wolves... | 500 | [
{
"input": "1 2\nSW",
"output": "No"
},
{
"input": "10 10\n....W.W.W.\n.........S\n.S.S...S..\nW.......SS\n.W..W.....\n.W...W....\nS..S...S.S\n....W...S.\n..S..S.S.S\nSS.......S",
"output": "Yes\nDDDDWDWDWD\nDDDDDDDDDS\nDSDSDDDSDD\nWDDDDDDDSS\nDWDDWDDDDD\nDWDDDWDDDD\nSDDSDDDSDS\nDDDDWDDDSD\nDDSD... | 1,594,540,415 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 12 | 233 | 37,376,000 | def okay(sl,r,c):
rv = [sl[i][j] for i in range(r) for j in range(c)]
cv = [sl[i][j] for j in range(c) for i in range(r)]
for i in range(1,r*c):
if i%r>0 and ((rv[i-1]=='S' and rv[i]=='W') or (rv[i-1]=='W' and rv[i]=='S')):
return False
if i%c>0 and ((cv[i-1]=='S' and cv[... | Title: Protect Sheep
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Bob is a farmer. He has a large pasture with many sheep. Recently, he has lost some of them due to wolf attacks. He thus decided to place some shepherd dogs in such a way that all his sheep are protected.
The pasture is ... | ```python
def okay(sl,r,c):
rv = [sl[i][j] for i in range(r) for j in range(c)]
cv = [sl[i][j] for j in range(c) for i in range(r)]
for i in range(1,r*c):
if i%r>0 and ((rv[i-1]=='S' and rv[i]=='W') or (rv[i-1]=='W' and rv[i]=='S')):
return False
if i%c>0 and ((cv[i-1]=='... | 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--------... | 1,641,292,225 | 2,147,483,647 | PyPy 3-64 | RUNTIME_ERROR | TESTS | 4 | 218 | 14,131,200 | colors= ["B","W"]
n,m = map(int,input().split())
board = []
unvisited = []
for i in range(n):
row = input()
for j in range(m):
if row[j] ==".":
unvisited.append((i,j))
board.append([c for c in row])
visited =[[False for j in range(m)] for i in range(n)]
def visit(i,j,c):
... | 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
colors= ["B","W"]
n,m = map(int,input().split())
board = []
unvisited = []
for i in range(n):
row = input()
for j in range(m):
if row[j] ==".":
unvisited.append((i,j))
board.append([c for c in row])
visited =[[False for j in range(m)] for i in range(n)]
def visit(i... | -1 | |
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?",
... | 1,649,088,539 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 22 | 92 | 0 | line = input()
ans, length = '', len(line)
res = ['a','e','i','o','u','y','A','E','I','O','U','Y']
if line[length-2] == ' ':
ans = line[length-3]
else:
ans = line[length-2]
if ans in res:
print('YES')
else:
print('NO')
| Title: Sleuth
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya plays the sleuth with his friends. The rules of the game are as follows: those who play for the first time, that is Vasya is the sleuth, he should investigate a "crime" and find out what is happening. He can ask any questions ... | ```python
line = input()
ans, length = '', len(line)
res = ['a','e','i','o','u','y','A','E','I','O','U','Y']
if line[length-2] == ' ':
ans = line[length-3]
else:
ans = line[length-2]
if ans in res:
print('YES')
else:
print('NO')
``` | 0 |
592 | C | The Big Race | PROGRAMMING | 1,800 | [
"math"
] | null | null | Vector Willman and Array Bolt are the two most famous athletes of Byteforces. They are going to compete in a race with a distance of *L* meters today.
Willman and Bolt have exactly the same speed, so when they compete the result is always a tie. That is a problem for the organizers because they want a winner.
While ... | The first line of the input contains three integers *t*, *w* and *b* (1<=≤<=*t*,<=*w*,<=*b*<=≤<=5·1018) — the maximum possible length of the racetrack, the length of Willman's steps and the length of Bolt's steps respectively. | Print the answer to the problem as an irreducible fraction . Follow the format of the samples output.
The fraction (*p* and *q* are integers, and both *p*<=≥<=0 and *q*<=><=0 holds) is called irreducible, if there is no such integer *d*<=><=1, that both *p* and *q* are divisible by *d*. | [
"10 3 2\n",
"7 1 2\n"
] | [
"3/10\n",
"3/7\n"
] | In the first sample Willman and Bolt will tie in case 1, 6 or 7 are chosen as the length of the racetrack. | 1,500 | [
{
"input": "10 3 2",
"output": "3/10"
},
{
"input": "7 1 2",
"output": "3/7"
},
{
"input": "1 1 1",
"output": "1/1"
},
{
"input": "5814 31 7",
"output": "94/2907"
},
{
"input": "94268 813 766",
"output": "765/94268"
},
{
"input": "262610 5583 4717",
... | 1,656,859,933 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 20 | 109 | 512,000 | def gcd(a, b):
if b == 0:
return a
else:
return gcd(b, a % b)
def lcm(a, b):
return (a*b) // gcd(a, b)
l = list(map(int, input().split()))
t = l[0]
w = l[1]
b = l[2]
ans = t // lcm(w, b) + 1
ans = ans * min(w, b) - 1
g = gcd(ans, t)
t = t // g
ans = ans // g
s = str(ans) + "/" + str(t)
pri... | Title: The Big Race
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vector Willman and Array Bolt are the two most famous athletes of Byteforces. They are going to compete in a race with a distance of *L* meters today.
Willman and Bolt have exactly the same speed, so when they compete the... | ```python
def gcd(a, b):
if b == 0:
return a
else:
return gcd(b, a % b)
def lcm(a, b):
return (a*b) // gcd(a, b)
l = list(map(int, input().split()))
t = l[0]
w = l[1]
b = l[2]
ans = t // lcm(w, b) + 1
ans = ans * min(w, b) - 1
g = gcd(ans, t)
t = t // g
ans = ans // g
s = str(ans) + "/" + ... | 0 | |
38 | A | Army | PROGRAMMING | 800 | [
"implementation"
] | A. Army | 2 | 256 | The Berland Armed Forces System consists of *n* ranks that are numbered using natural numbers from 1 to *n*, where 1 is the lowest rank and *n* is the highest rank.
One needs exactly *d**i* years to rise from rank *i* to rank *i*<=+<=1. Reaching a certain rank *i* having not reached all the previous *i*<=-<=1 ranks is... | The first input line contains an integer *n* (2<=≤<=*n*<=≤<=100). The second line contains *n*<=-<=1 integers *d**i* (1<=≤<=*d**i*<=≤<=100). The third input line contains two integers *a* and *b* (1<=≤<=*a*<=<<=*b*<=≤<=*n*). The numbers on the lines are space-separated. | Print the single number which is the number of years that Vasya needs to rise from rank *a* to rank *b*. | [
"3\n5 6\n1 2\n",
"3\n5 6\n1 3\n"
] | [
"5\n",
"11\n"
] | none | 0 | [
{
"input": "3\n5 6\n1 2",
"output": "5"
},
{
"input": "3\n5 6\n1 3",
"output": "11"
},
{
"input": "2\n55\n1 2",
"output": "55"
},
{
"input": "3\n85 78\n1 3",
"output": "163"
},
{
"input": "4\n63 4 49\n2 3",
"output": "4"
},
{
"input": "5\n93 83 42 56\n... | 1,621,869,507 | 2,147,483,647 | Python 3 | OK | TESTS | 50 | 154 | 0 | n = int(input())
d = list(map(int, input().split()))
c = input().split()
a = int(c[0])
b = int(c[1])
res = 0
for i in range(a - 1, b - 1):
res += d[i]
print(res) | Title: Army
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
The Berland Armed Forces System consists of *n* ranks that are numbered using natural numbers from 1 to *n*, where 1 is the lowest rank and *n* is the highest rank.
One needs exactly *d**i* years to rise from rank *i* to rank *i*<=+<... | ```python
n = int(input())
d = list(map(int, input().split()))
c = input().split()
a = int(c[0])
b = int(c[1])
res = 0
for i in range(a - 1, b - 1):
res += d[i]
print(res)
``` | 3.9615 |
61 | A | Ultra-Fast Mathematician | PROGRAMMING | 800 | [
"implementation"
] | A. Ultra-Fast Mathematician | 2 | 256 | Shapur was an extremely gifted student. He was great at everything including Combinatorics, Algebra, Number Theory, Geometry, Calculus, etc. He was not only smart but extraordinarily fast! He could manage to sum 1018 numbers in a single second.
One day in 230 AD Shapur was trying to find out if any one can possibly do... | There are two lines in each input. Each of them contains a single number. It is guaranteed that the numbers are made from 0 and 1 only and that their length is same. The numbers may start with 0. The length of each number doesn't exceed 100. | Write one line — the corresponding answer. Do not omit the leading 0s. | [
"1010100\n0100101\n",
"000\n111\n",
"1110\n1010\n",
"01110\n01100\n"
] | [
"1110001\n",
"111\n",
"0100\n",
"00010\n"
] | none | 500 | [
{
"input": "1010100\n0100101",
"output": "1110001"
},
{
"input": "000\n111",
"output": "111"
},
{
"input": "1110\n1010",
"output": "0100"
},
{
"input": "01110\n01100",
"output": "00010"
},
{
"input": "011101\n000001",
"output": "011100"
},
{
"input": "... | 1,673,607,541 | 2,147,483,647 | Python 3 | OK | TESTS | 102 | 46 | 0 | f,s = str(input()), str(input())
j=0
for i in f:
if i != s[j]:
print("1",end = "")
else:
print("0",end = "")
j += 1 | Title: Ultra-Fast Mathematician
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Shapur was an extremely gifted student. He was great at everything including Combinatorics, Algebra, Number Theory, Geometry, Calculus, etc. He was not only smart but extraordinarily fast! He could manage to sum 10... | ```python
f,s = str(input()), str(input())
j=0
for i in f:
if i != s[j]:
print("1",end = "")
else:
print("0",end = "")
j += 1
``` | 3.9885 |
918 | A | Eleven | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | Eleven wants to choose a new name for herself. As a bunch of geeks, her friends suggested an algorithm to choose a name for her. Eleven wants her name to have exactly *n* characters.
Her friend suggested that her name should only consist of uppercase and lowercase letters 'O'. More precisely, they suggested that the ... | The first and only line of input contains an integer *n* (1<=≤<=*n*<=≤<=1000). | Print Eleven's new name on the first and only line of output. | [
"8\n",
"15\n"
] | [
"OOOoOooO\n",
"OOOoOooOooooOoo\n"
] | none | 500 | [
{
"input": "8",
"output": "OOOoOooO"
},
{
"input": "15",
"output": "OOOoOooOooooOoo"
},
{
"input": "85",
"output": "OOOoOooOooooOoooooooOooooooooooooOooooooooooooooooooooOoooooooooooooooooooooooooooooo"
},
{
"input": "381",
"output": "OOOoOooOooooOoooooooOooooooooooooOooo... | 1,599,750,577 | 2,147,483,647 | Python 3 | OK | TESTS | 18 | 108 | 0 | n = int(input())
s = ''
c = [1]
a = b = 1
d = a+b
while d<=n:
d = a+b
c.append(d)
a=b
b=d
for i in range(n):
if i+1 in c:
s+='O'
else:
s+='o'
print(s)
| Title: Eleven
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Eleven wants to choose a new name for herself. As a bunch of geeks, her friends suggested an algorithm to choose a name for her. Eleven wants her name to have exactly *n* characters.
Her friend suggested that her name should o... | ```python
n = int(input())
s = ''
c = [1]
a = b = 1
d = a+b
while d<=n:
d = a+b
c.append(d)
a=b
b=d
for i in range(n):
if i+1 in c:
s+='O'
else:
s+='o'
print(s)
``` | 3 | |
892 | A | Greed | PROGRAMMING | 900 | [
"greedy",
"implementation"
] | null | null | Jafar has *n* cans of cola. Each can is described by two integers: remaining volume of cola *a**i* and can's capacity *b**i* (*a**i* <=≤<= *b**i*).
Jafar has decided to pour all remaining cola into just 2 cans, determine if he can do this or not! | The first line of the input contains one integer *n* (2<=≤<=*n*<=≤<=100<=000) — number of cola cans.
The second line contains *n* space-separated integers *a*1,<=*a*2,<=...,<=*a**n* (0<=≤<=*a**i*<=≤<=109) — volume of remaining cola in cans.
The third line contains *n* space-separated integers that *b*1,<=*b*2,<=...,<... | Print "YES" (without quotes) if it is possible to pour all remaining cola in 2 cans. Otherwise print "NO" (without quotes).
You can print each letter in any case (upper or lower). | [
"2\n3 5\n3 6\n",
"3\n6 8 9\n6 10 12\n",
"5\n0 0 5 0 0\n1 1 8 10 5\n",
"4\n4 1 0 3\n5 2 2 3\n"
] | [
"YES\n",
"NO\n",
"YES\n",
"YES\n"
] | In the first sample, there are already 2 cans, so the answer is "YES". | 500 | [
{
"input": "2\n3 5\n3 6",
"output": "YES"
},
{
"input": "3\n6 8 9\n6 10 12",
"output": "NO"
},
{
"input": "5\n0 0 5 0 0\n1 1 8 10 5",
"output": "YES"
},
{
"input": "4\n4 1 0 3\n5 2 2 3",
"output": "YES"
},
{
"input": "10\n9 10 24 11 1 7 8 3 28 14\n86 20 34 11 22 9... | 1,615,476,729 | 2,147,483,647 | Python 3 | OK | TESTS | 39 | 170 | 11,366,400 | def canFill(cola_volumes, can_capacities):
total_volume = sum(cola_volumes)
can_capacities.sort()
if total_volume <= can_capacities[-1] + can_capacities[-2]:
return "YES"
return "NO"
no_of_cans = int(input())
cola_volumes = list(map(int, input().split()))
can_capacities = list(map(int, input().... | Title: Greed
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Jafar has *n* cans of cola. Each can is described by two integers: remaining volume of cola *a**i* and can's capacity *b**i* (*a**i* <=≤<= *b**i*).
Jafar has decided to pour all remaining cola into just 2 cans, determine if he c... | ```python
def canFill(cola_volumes, can_capacities):
total_volume = sum(cola_volumes)
can_capacities.sort()
if total_volume <= can_capacities[-1] + can_capacities[-2]:
return "YES"
return "NO"
no_of_cans = int(input())
cola_volumes = list(map(int, input().split()))
can_capacities = list(map(int... | 3 | |
177 | D1 | Encrypting Messages | PROGRAMMING | 1,200 | [
"brute force"
] | null | null | The Smart Beaver from ABBYY invented a new message encryption method and now wants to check its performance. Checking it manually is long and tiresome, so he decided to ask the ABBYY Cup contestants for help.
A message is a sequence of *n* integers *a*1,<=*a*2,<=...,<=*a**n*. Encryption uses a key which is a sequence ... | The first input line contains three integers *n*, *m* and *c*, separated by single spaces.
The second input line contains *n* integers *a**i* (0<=≤<=*a**i*<=<<=*c*), separated by single spaces — the original message.
The third input line contains *m* integers *b**i* (0<=≤<=*b**i*<=<<=*c*), separated by single... | Print *n* space-separated integers — the result of encrypting the original message. | [
"4 3 2\n1 1 1 1\n1 1 1\n",
"3 1 5\n1 2 3\n4\n"
] | [
"0 1 1 0\n",
"0 1 2\n"
] | In the first sample the encryption is performed in two steps: after the first step *a* = (0, 0, 0, 1) (remember that the calculations are performed modulo 2), after the second step *a* = (0, 1, 1, 0), and that is the answer. | 30 | [
{
"input": "4 3 2\n1 1 1 1\n1 1 1",
"output": "0 1 1 0"
},
{
"input": "3 1 5\n1 2 3\n4",
"output": "0 1 2"
},
{
"input": "5 2 7\n0 0 1 2 4\n3 5",
"output": "3 1 2 3 2"
},
{
"input": "20 15 17\n4 9 14 11 15 16 15 4 0 10 7 12 10 1 8 6 7 14 1 13\n6 3 14 8 8 11 16 4 5 9 2 13 6 14... | 1,693,922,562 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS1 | 0 | 60 | 0 | def solve():
n, m, c = map(int, input().split())
n_nums = list(map(int, input().split()))
m_nums = list(map(int, input().split()))
for i in range(n - m + 1):
k = 0
for j in range(i, m + 1):
n_nums += m_nums[k]
n_nums %= c
k += ... | Title: Encrypting Messages
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Smart Beaver from ABBYY invented a new message encryption method and now wants to check its performance. Checking it manually is long and tiresome, so he decided to ask the ABBYY Cup contestants for help.
A mes... | ```python
def solve():
n, m, c = map(int, input().split())
n_nums = list(map(int, input().split()))
m_nums = list(map(int, input().split()))
for i in range(n - m + 1):
k = 0
for j in range(i, m + 1):
n_nums += m_nums[k]
n_nums %= c
... | -1 | |
302 | A | Eugeny and Array | PROGRAMMING | 800 | [
"implementation"
] | null | null | Eugeny has array *a*<==<=*a*1,<=*a*2,<=...,<=*a**n*, consisting of *n* integers. Each integer *a**i* equals to -1, or to 1. Also, he has *m* queries:
- Query number *i* is given as a pair of integers *l**i*, *r**i* (1<=≤<=*l**i*<=≤<=*r**i*<=≤<=*n*). - The response to the query will be integer 1, if the elements of a... | The first line contains integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=2·105). The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (*a**i*<==<=-1,<=1). Next *m* lines contain Eugene's queries. The *i*-th line contains integers *l**i*,<=*r**i* (1<=≤<=*l**i*<=≤<=*r**i*<=≤<=*n*). | Print *m* integers — the responses to Eugene's queries in the order they occur in the input. | [
"2 3\n1 -1\n1 1\n1 2\n2 2\n",
"5 5\n-1 1 1 1 -1\n1 1\n2 3\n3 5\n2 5\n1 5\n"
] | [
"0\n1\n0\n",
"0\n1\n0\n1\n0\n"
] | none | 500 | [
{
"input": "2 3\n1 -1\n1 1\n1 2\n2 2",
"output": "0\n1\n0"
},
{
"input": "5 5\n-1 1 1 1 -1\n1 1\n2 3\n3 5\n2 5\n1 5",
"output": "0\n1\n0\n1\n0"
},
{
"input": "3 3\n1 1 1\n2 2\n1 1\n1 1",
"output": "0\n0\n0"
},
{
"input": "4 4\n-1 -1 -1 -1\n1 3\n1 2\n1 2\n1 1",
"output": "... | 1,594,407,278 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 124 | 7,065,600 | from collections import Counter
n,m=map(int,input().split())
l=list(map(int,input().split()))
a=Counter(l)
b=min(a[-1],a[1])*2
for i in range(m):
e,f=map(int,input().split())
r=e-f+1
if(r%2!=0):
print("0")
else:
if(r<=b):
print("1")
else:
pri... | Title: Eugeny and Array
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Eugeny has array *a*<==<=*a*1,<=*a*2,<=...,<=*a**n*, consisting of *n* integers. Each integer *a**i* equals to -1, or to 1. Also, he has *m* queries:
- Query number *i* is given as a pair of integers *l**i*, *r**i* (... | ```python
from collections import Counter
n,m=map(int,input().split())
l=list(map(int,input().split()))
a=Counter(l)
b=min(a[-1],a[1])*2
for i in range(m):
e,f=map(int,input().split())
r=e-f+1
if(r%2!=0):
print("0")
else:
if(r<=b):
print("1")
else:
... | 0 | |
465 | A | inc ARG | PROGRAMMING | 900 | [
"implementation"
] | null | null | Sergey is testing a next-generation processor. Instead of bytes the processor works with memory cells consisting of *n* bits. These bits are numbered from 1 to *n*. An integer is stored in the cell in the following way: the least significant bit is stored in the first bit of the cell, the next significant bit is stored... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=100) — the number of bits in the cell.
The second line contains a string consisting of *n* characters — the initial state of the cell. The first character denotes the state of the first bit of the cell. The second character denotes the second least significan... | Print a single integer — the number of bits in the cell which change their state after we add 1 to the cell. | [
"4\n1100\n",
"4\n1111\n"
] | [
"3\n",
"4\n"
] | In the first sample the cell ends up with value 0010, in the second sample — with 0000. | 500 | [
{
"input": "4\n1100",
"output": "3"
},
{
"input": "4\n1111",
"output": "4"
},
{
"input": "1\n0",
"output": "1"
},
{
"input": "1\n1",
"output": "1"
},
{
"input": "2\n00",
"output": "1"
},
{
"input": "2\n01",
"output": "1"
},
{
"input": "2\n1... | 1,519,694,299 | 2,147,483,647 | Python 3 | OK | TESTS | 29 | 62 | 5,836,800 | bits = int(input())
num = input()
total = 0
for i in num:
if i == "0":
total += 1
break
else:
total += 1
print(total) | Title: inc ARG
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Sergey is testing a next-generation processor. Instead of bytes the processor works with memory cells consisting of *n* bits. These bits are numbered from 1 to *n*. An integer is stored in the cell in the following way: the lea... | ```python
bits = int(input())
num = input()
total = 0
for i in num:
if i == "0":
total += 1
break
else:
total += 1
print(total)
``` | 3 | |
315 | A | Sereja and Bottles | PROGRAMMING | 1,400 | [
"brute force"
] | null | null | Sereja and his friends went to a picnic. The guys had *n* soda bottles just for it. Sereja forgot the bottle opener as usual, so the guys had to come up with another way to open bottles.
Sereja knows that the *i*-th bottle is from brand *a**i*, besides, you can use it to open other bottles of brand *b**i*. You can use... | The first line contains integer *n* (1<=≤<=*n*<=≤<=100) — the number of bottles. The next *n* lines contain the bottles' description. The *i*-th line contains two integers *a**i*,<=*b**i* (1<=≤<=*a**i*,<=*b**i*<=≤<=1000) — the description of the *i*-th bottle. | In a single line print a single integer — the answer to the problem. | [
"4\n1 1\n2 2\n3 3\n4 4\n",
"4\n1 2\n2 3\n3 4\n4 1\n"
] | [
"4\n",
"0\n"
] | none | 500 | [
{
"input": "4\n1 1\n2 2\n3 3\n4 4",
"output": "4"
},
{
"input": "4\n1 2\n2 3\n3 4\n4 1",
"output": "0"
},
{
"input": "3\n2 828\n4 392\n4 903",
"output": "3"
},
{
"input": "4\n2 3\n1 772\n3 870\n3 668",
"output": "2"
},
{
"input": "5\n1 4\n6 6\n4 3\n3 4\n4 758",
... | 1,628,080,667 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 10 | 186 | 20,172,800 | n = int(input())
opened = 0
A = list()
B = list()
for _ in range(n):
a, b = map(int, input().split())
A.append(a)
B.append(b)
for i in range(n):
if A[i] in B:
idx = B.index(A[i])
if i != idx:
opened += 1
print(n - opened)
| Title: Sereja and Bottles
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Sereja and his friends went to a picnic. The guys had *n* soda bottles just for it. Sereja forgot the bottle opener as usual, so the guys had to come up with another way to open bottles.
Sereja knows that the *i*-th... | ```python
n = int(input())
opened = 0
A = list()
B = list()
for _ in range(n):
a, b = map(int, input().split())
A.append(a)
B.append(b)
for i in range(n):
if A[i] in B:
idx = B.index(A[i])
if i != idx:
opened += 1
print(n - opened)
``` | 0 | |
853 | A | Planning | PROGRAMMING | 1,500 | [
"greedy"
] | null | null | Helen works in Metropolis airport. She is responsible for creating a departure schedule. There are *n* flights that must depart today, the *i*-th of them is planned to depart at the *i*-th minute of the day.
Metropolis airport is the main transport hub of Metropolia, so it is difficult to keep the schedule intact. Thi... | The first line contains two integers *n* and *k* (1<=≤<=*k*<=≤<=*n*<=≤<=300<=000), here *n* is the number of flights, and *k* is the number of minutes in the beginning of the day that the flights did not depart.
The second line contains *n* integers *c*1,<=*c*2,<=...,<=*c**n* (1<=≤<=*c**i*<=≤<=107), here *c**i* is the... | The first line must contain the minimum possible total cost of delaying the flights.
The second line must contain *n* different integers *t*1,<=*t*2,<=...,<=*t**n* (*k*<=+<=1<=≤<=*t**i*<=≤<=*k*<=+<=*n*), here *t**i* is the minute when the *i*-th flight must depart. If there are several optimal schedules, print any of ... | [
"5 2\n4 2 1 10 2\n"
] | [
"20\n3 6 7 4 5 \n"
] | Let us consider sample test. If Helen just moves all flights 2 minutes later preserving the order, the total cost of delaying the flights would be (3 - 1)·4 + (4 - 2)·2 + (5 - 3)·1 + (6 - 4)·10 + (7 - 5)·2 = 38 burles.
However, the better schedule is shown in the sample answer, its cost is (3 - 1)·4 + (6 - 2)·2 + (7 ... | 750 | [
{
"input": "5 2\n4 2 1 10 2",
"output": "20\n3 6 7 4 5 "
},
{
"input": "3 2\n3 1 2",
"output": "11\n3 5 4 "
},
{
"input": "5 5\n5 5 9 100 3",
"output": "321\n9 8 7 6 10 "
},
{
"input": "1 1\n1",
"output": "1\n2 "
},
{
"input": "1 1\n10000000",
"output": "10000... | 1,628,334,053 | 2,147,483,647 | PyPy 3 | OK | TESTS | 56 | 857 | 58,880,000 | from heapq import heappush, heappop, heapify
n, k = map(int, input().split())
planes = list(map(int, input().split()))
iterplanes = [(-planes[i], i) for i in range(len(planes))]
cost = 0
l = []
heapify(l)
for i in range(k):
heappush(l, iterplanes[i])
for i in range(k, n):
heappush(l, iterplanes... | Title: Planning
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Helen works in Metropolis airport. She is responsible for creating a departure schedule. There are *n* flights that must depart today, the *i*-th of them is planned to depart at the *i*-th minute of the day.
Metropolis airpor... | ```python
from heapq import heappush, heappop, heapify
n, k = map(int, input().split())
planes = list(map(int, input().split()))
iterplanes = [(-planes[i], i) for i in range(len(planes))]
cost = 0
l = []
heapify(l)
for i in range(k):
heappush(l, iterplanes[i])
for i in range(k, n):
heappush(l, ... | 3 | |
677 | A | Vanya and Fence | PROGRAMMING | 800 | [
"implementation"
] | null | null | Vanya and his friends are walking along the fence of height *h* and they do not want the guard to notice them. In order to achieve this the height of each of the friends should not exceed *h*. If the height of some person is greater than *h* he can bend down and then he surely won't be noticed by the guard. The height ... | The first line of the input contains two integers *n* and *h* (1<=≤<=*n*<=≤<=1000, 1<=≤<=*h*<=≤<=1000) — the number of friends and the height of the fence, respectively.
The second line contains *n* integers *a**i* (1<=≤<=*a**i*<=≤<=2*h*), the *i*-th of them is equal to the height of the *i*-th person. | Print a single integer — the minimum possible valid width of the road. | [
"3 7\n4 5 14\n",
"6 1\n1 1 1 1 1 1\n",
"6 5\n7 6 8 9 10 5\n"
] | [
"4\n",
"6\n",
"11\n"
] | In the first sample, only person number 3 must bend down, so the required width is equal to 1 + 1 + 2 = 4.
In the second sample, all friends are short enough and no one has to bend, so the width 1 + 1 + 1 + 1 + 1 + 1 = 6 is enough.
In the third sample, all the persons have to bend, except the last one. The required m... | 500 | [
{
"input": "3 7\n4 5 14",
"output": "4"
},
{
"input": "6 1\n1 1 1 1 1 1",
"output": "6"
},
{
"input": "6 5\n7 6 8 9 10 5",
"output": "11"
},
{
"input": "10 420\n214 614 297 675 82 740 174 23 255 15",
"output": "13"
},
{
"input": "10 561\n657 23 1096 487 785 66 481... | 1,689,618,499 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 29 | 62 | 0 | n,h=map(int, input().split())
a=list(map(int, input().split()))
count=0
for i in range (0,n):
if a[i]>h:
count+=2
else:
count +=1
print(count) | Title: Vanya and Fence
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vanya and his friends are walking along the fence of height *h* and they do not want the guard to notice them. In order to achieve this the height of each of the friends should not exceed *h*. If the height of some pers... | ```python
n,h=map(int, input().split())
a=list(map(int, input().split()))
count=0
for i in range (0,n):
if a[i]>h:
count+=2
else:
count +=1
print(count)
``` | 3 | |
609 | C | Load Balancing | PROGRAMMING | 1,500 | [
"implementation",
"math"
] | null | null | In the school computer room there are *n* servers which are responsible for processing several computing tasks. You know the number of scheduled tasks for each server: there are *m**i* tasks assigned to the *i*-th server.
In order to balance the load for each server, you want to reassign some tasks to make the differe... | The first line contains positive number *n* (1<=≤<=*n*<=≤<=105) — the number of the servers.
The second line contains the sequence of non-negative integers *m*1,<=*m*2,<=...,<=*m**n* (0<=≤<=*m**i*<=≤<=2·104), where *m**i* is the number of tasks assigned to the *i*-th server. | Print the minimum number of seconds required to balance the load. | [
"2\n1 6\n",
"7\n10 11 10 11 10 11 11\n",
"5\n1 2 3 4 5\n"
] | [
"2\n",
"0\n",
"3\n"
] | In the first example two seconds are needed. In each second, a single task from server #2 should be moved to server #1. After two seconds there should be 3 tasks on server #1 and 4 tasks on server #2.
In the second example the load is already balanced.
A possible sequence of task movements for the third example is:
... | 0 | [
{
"input": "2\n1 6",
"output": "2"
},
{
"input": "7\n10 11 10 11 10 11 11",
"output": "0"
},
{
"input": "5\n1 2 3 4 5",
"output": "3"
},
{
"input": "10\n0 0 0 0 0 0 0 0 0 0",
"output": "0"
},
{
"input": "1\n0",
"output": "0"
},
{
"input": "1\n20000",
... | 1,649,138,130 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 58 | 155 | 15,462,400 |
n = int(input())
t = list(map(int,input().split()))
t.sort()
s = sum(t)
avg = s//n
mod = s%n
target = [avg]*(n-mod) + [avg+1]*mod
ans =0
for i in range(n):
ans += abs(target[i]-t[i])
print(ans//2)
| Title: Load Balancing
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
In the school computer room there are *n* servers which are responsible for processing several computing tasks. You know the number of scheduled tasks for each server: there are *m**i* tasks assigned to the *i*-th server... | ```python
n = int(input())
t = list(map(int,input().split()))
t.sort()
s = sum(t)
avg = s//n
mod = s%n
target = [avg]*(n-mod) + [avg+1]*mod
ans =0
for i in range(n):
ans += abs(target[i]-t[i])
print(ans//2)
``` | 3 | |
461 | A | Appleman and Toastman | PROGRAMMING | 1,200 | [
"greedy",
"sortings"
] | null | null | Appleman and Toastman play a game. Initially Appleman gives one group of *n* numbers to the Toastman, then they start to complete the following tasks:
- Each time Toastman gets a group of numbers, he sums up all the numbers and adds this sum to the score. Then he gives the group to the Appleman. - Each time Appleman... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=3·105). The second line contains *n* integers *a*1, *a*2, ..., *a**n* (1<=≤<=*a**i*<=≤<=106) — the initial group that is given to Toastman. | Print a single integer — the largest possible score. | [
"3\n3 1 5\n",
"1\n10\n"
] | [
"26\n",
"10\n"
] | Consider the following situation in the first example. Initially Toastman gets group [3, 1, 5] and adds 9 to the score, then he give the group to Appleman. Appleman splits group [3, 1, 5] into two groups: [3, 5] and [1]. Both of them should be given to Toastman. When Toastman receives group [1], he adds 1 to score and ... | 500 | [
{
"input": "3\n3 1 5",
"output": "26"
},
{
"input": "1\n10",
"output": "10"
},
{
"input": "10\n8 10 2 5 6 2 4 7 2 1",
"output": "376"
},
{
"input": "10\n171308 397870 724672 431255 228496 892002 542924 718337 888642 161821",
"output": "40204082"
},
{
"input": "10\... | 1,502,052,741 | 2,147,483,647 | Python 3 | OK | TESTS | 36 | 498 | 25,702,400 | input()
a = list(map(int,input().split(' ')))
sum = 0
a.sort()
for i in range(len(a)):
sum += (i+2)*a[i]
sum -= max(a)
print(sum) | Title: Appleman and Toastman
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Appleman and Toastman play a game. Initially Appleman gives one group of *n* numbers to the Toastman, then they start to complete the following tasks:
- Each time Toastman gets a group of numbers, he sums up all... | ```python
input()
a = list(map(int,input().split(' ')))
sum = 0
a.sort()
for i in range(len(a)):
sum += (i+2)*a[i]
sum -= max(a)
print(sum)
``` | 3 | |
689 | B | Mike and Shortcuts | PROGRAMMING | 1,600 | [
"dfs and similar",
"graphs",
"greedy",
"shortest paths"
] | null | null | Recently, Mike was very busy with studying for exams and contests. Now he is going to chill a bit by doing some sight seeing in the city.
City consists of *n* intersections numbered from 1 to *n*. Mike starts walking from his house located at the intersection number 1 and goes along some sequence of intersections. Wal... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=200<=000) — the number of Mike's city intersection.
The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (*i*<=≤<=*a**i*<=≤<=*n* , , describing shortcuts of Mike's city, allowing to walk from intersection *i* to intersection *a**i* using only 1 unit of ... | In the only line print *n* integers *m*1,<=*m*2,<=...,<=*m**n*, where *m**i* denotes the least amount of total energy required to walk from intersection 1 to intersection *i*. | [
"3\n2 2 3\n",
"5\n1 2 3 4 5\n",
"7\n4 4 4 4 7 7 7\n"
] | [
"0 1 2 \n",
"0 1 2 3 4 \n",
"0 1 2 1 2 3 3 \n"
] | In the first sample case desired sequences are:
1: 1; *m*<sub class="lower-index">1</sub> = 0;
2: 1, 2; *m*<sub class="lower-index">2</sub> = 1;
3: 1, 3; *m*<sub class="lower-index">3</sub> = |3 - 1| = 2.
In the second sample case the sequence for any intersection 1 < *i* is always 1, *i* and *m*<sub class="lowe... | 1,000 | [
{
"input": "3\n2 2 3",
"output": "0 1 2 "
},
{
"input": "5\n1 2 3 4 5",
"output": "0 1 2 3 4 "
},
{
"input": "7\n4 4 4 4 7 7 7",
"output": "0 1 2 1 2 3 3 "
},
{
"input": "98\n17 17 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 87 87... | 1,621,723,149 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 0 | 124 | 2,150,400 | n = int(inpit())
a = list(map(int,inpit().split()))
dist = [-1] * n
dist[0] = 0
pos = [0]
for i in pos:
for j in [i - 1, i + 1, a[i] - 1]:
if j >= 0 and j < n and dist[j] == -1:
dist[j] = dist[i] + 1
pos.append(j)
print(*dist) | Title: Mike and Shortcuts
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Recently, Mike was very busy with studying for exams and contests. Now he is going to chill a bit by doing some sight seeing in the city.
City consists of *n* intersections numbered from 1 to *n*. Mike starts walkin... | ```python
n = int(inpit())
a = list(map(int,inpit().split()))
dist = [-1] * n
dist[0] = 0
pos = [0]
for i in pos:
for j in [i - 1, i + 1, a[i] - 1]:
if j >= 0 and j < n and dist[j] == -1:
dist[j] = dist[i] + 1
pos.append(j)
print(*dist)
``` | -1 | |
948 | A | Protect Sheep | PROGRAMMING | 900 | [
"brute force",
"dfs and similar",
"graphs",
"implementation"
] | null | null | Bob is a farmer. He has a large pasture with many sheep. Recently, he has lost some of them due to wolf attacks. He thus decided to place some shepherd dogs in such a way that all his sheep are protected.
The pasture is a rectangle consisting of *R*<=×<=*C* cells. Each cell is either empty, contains a sheep, a wolf or... | First line contains two integers *R* (1<=≤<=*R*<=≤<=500) and *C* (1<=≤<=*C*<=≤<=500), denoting the number of rows and the numbers of columns respectively.
Each of the following *R* lines is a string consisting of exactly *C* characters, representing one row of the pasture. Here, 'S' means a sheep, 'W' a wolf and '.' a... | If it is impossible to protect all sheep, output a single line with the word "No".
Otherwise, output a line with the word "Yes". Then print *R* lines, representing the pasture after placing dogs. Again, 'S' means a sheep, 'W' a wolf, 'D' is a dog and '.' an empty space. You are not allowed to move, remove or add a she... | [
"6 6\n..S...\n..S.W.\n.S....\n..W...\n...W..\n......\n",
"1 2\nSW\n",
"5 5\n.S...\n...S.\nS....\n...S.\n.S...\n"
] | [
"Yes\n..SD..\n..SDW.\n.SD...\n.DW...\nDD.W..\n......\n",
"No\n",
"Yes\n.S...\n...S.\nS.D..\n...S.\n.S...\n"
] | In the first example, we can split the pasture into two halves, one containing wolves and one containing sheep. Note that the sheep at (2,1) is safe, as wolves cannot move diagonally.
In the second example, there are no empty spots to put dogs that would guard the lone sheep.
In the third example, there are no wolves... | 500 | [
{
"input": "1 2\nSW",
"output": "No"
},
{
"input": "10 10\n....W.W.W.\n.........S\n.S.S...S..\nW.......SS\n.W..W.....\n.W...W....\nS..S...S.S\n....W...S.\n..S..S.S.S\nSS.......S",
"output": "Yes\nDDDDWDWDWD\nDDDDDDDDDS\nDSDSDDDSDD\nWDDDDDDDSS\nDWDDWDDDDD\nDWDDDWDDDD\nSDDSDDDSDS\nDDDDWDDDSD\nDDSD... | 1,574,977,679 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 108 | 0 | def get_input():
while True:
vinput = input()
[R,C] = vinput.split(' ')
R = int(R)
C = int(C)
if R >=1 and R<=500 or C >=1 and C<=500:
break
print('Error R y C deben estar en [1,500]')
vmap = []
for _ in range(R):
vmap.append(list(input()))... | Title: Protect Sheep
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Bob is a farmer. He has a large pasture with many sheep. Recently, he has lost some of them due to wolf attacks. He thus decided to place some shepherd dogs in such a way that all his sheep are protected.
The pasture is ... | ```python
def get_input():
while True:
vinput = input()
[R,C] = vinput.split(' ')
R = int(R)
C = int(C)
if R >=1 and R<=500 or C >=1 and C<=500:
break
print('Error R y C deben estar en [1,500]')
vmap = []
for _ in range(R):
vmap.append(list... | 0 | |
431 | A | Black Square | PROGRAMMING | 800 | [
"implementation"
] | null | null | Quite recently, a very smart student named Jury decided that lectures are boring, so he downloaded a game called "Black Square" on his super cool touchscreen phone.
In this game, the phone's screen is divided into four vertical strips. Each second, a black square appears on some of the strips. According to the rules o... | The first line contains four space-separated integers *a*1, *a*2, *a*3, *a*4 (0<=≤<=*a*1,<=*a*2,<=*a*3,<=*a*4<=≤<=104).
The second line contains string *s* (1<=≤<=|*s*|<=≤<=105), where the *і*-th character of the string equals "1", if on the *i*-th second of the game the square appears on the first strip, "2", if it a... | Print a single integer — the total number of calories that Jury wastes. | [
"1 2 3 4\n123214\n",
"1 5 3 2\n11221\n"
] | [
"13\n",
"13\n"
] | none | 500 | [
{
"input": "1 2 3 4\n123214",
"output": "13"
},
{
"input": "1 5 3 2\n11221",
"output": "13"
},
{
"input": "5 5 5 1\n3422",
"output": "16"
},
{
"input": "4 3 2 1\n2",
"output": "3"
},
{
"input": "5651 6882 6954 4733\n2442313421",
"output": "60055"
},
{
... | 1,698,888,394 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 49 | 77 | 1,945,600 | a = str(input())
b = a.split()
c = [int(x) for x in b]
counter = 0
d = str(input())
for x in d:
if x == "1":
counter = counter + c[0]
elif x == "2":
counter = counter + c[1]
elif x == "3":
counter = counter + c[2]
elif x == "4":
counter = counter + c[3... | Title: Black Square
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Quite recently, a very smart student named Jury decided that lectures are boring, so he downloaded a game called "Black Square" on his super cool touchscreen phone.
In this game, the phone's screen is divided into four ve... | ```python
a = str(input())
b = a.split()
c = [int(x) for x in b]
counter = 0
d = str(input())
for x in d:
if x == "1":
counter = counter + c[0]
elif x == "2":
counter = counter + c[1]
elif x == "3":
counter = counter + c[2]
elif x == "4":
counter = coun... | 3 | |
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... | 1,636,264,158 | 2,147,483,647 | Python 3 | OK | TESTS | 35 | 124 | 4,300,800 | m, n = map(int,input().split())
boxes = m*n
print(boxes//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
m, n = map(int,input().split())
boxes = m*n
print(boxes//2)
``` | 3.960989 |
0 | none | none | none | 0 | [
"none"
] | null | null | Little Petya likes points a lot. Recently his mom has presented him *n* points lying on the line *OX*. Now Petya is wondering in how many ways he can choose three distinct points so that the distance between the two farthest of them doesn't exceed *d*.
Note that the order of the points inside the group of three chosen... | The first line contains two integers: *n* and *d* (1<=≤<=*n*<=≤<=105; 1<=≤<=*d*<=≤<=109). The next line contains *n* integers *x*1,<=*x*2,<=...,<=*x**n*, their absolute value doesn't exceed 109 — the *x*-coordinates of the points that Petya has got.
It is guaranteed that the coordinates of the points in the input stri... | Print a single integer — the number of groups of three points, where the distance between two farthest points doesn't exceed *d*.
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. | [
"4 3\n1 2 3 4\n",
"4 2\n-3 -2 -1 0\n",
"5 19\n1 10 20 30 50\n"
] | [
"4\n",
"2\n",
"1\n"
] | In the first sample any group of three points meets our conditions.
In the seconds sample only 2 groups of three points meet our conditions: {-3, -2, -1} and {-2, -1, 0}.
In the third sample only one group does: {1, 10, 20}. | 0 | [
{
"input": "4 3\n1 2 3 4",
"output": "4"
},
{
"input": "4 2\n-3 -2 -1 0",
"output": "2"
},
{
"input": "5 19\n1 10 20 30 50",
"output": "1"
},
{
"input": "10 5\n31 36 43 47 48 50 56 69 71 86",
"output": "2"
},
{
"input": "10 50\n1 4 20 27 65 79 82 83 99 100",
"... | 1,624,529,002 | 2,147,483,647 | Python 3 | OK | TESTS | 39 | 466 | 8,499,200 | from math import *
from bisect import *
n, d = map(int, input().split())
l = list(map(int, input().split()))
ans = 0
for i, j in enumerate(l):
x = bisect_right(l, j+d)
val = (x-i-1)
ans += comb(val, 2)
print(ans)
| Title: none
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little Petya likes points a lot. Recently his mom has presented him *n* points lying on the line *OX*. Now Petya is wondering in how many ways he can choose three distinct points so that the distance between the two farthest of th... | ```python
from math import *
from bisect import *
n, d = map(int, input().split())
l = list(map(int, input().split()))
ans = 0
for i, j in enumerate(l):
x = bisect_right(l, j+d)
val = (x-i-1)
ans += comb(val, 2)
print(ans)
``` | 3 | |
832 | A | Sasha and Sticks | PROGRAMMING | 800 | [
"games",
"math"
] | null | null | It's one more school day now. Sasha doesn't like classes and is always bored at them. So, each day he invents some game and plays in it alone or with friends.
Today he invented one simple game to play with Lena, with whom he shares a desk. The rules are simple. Sasha draws *n* sticks in a row. After that the players t... | The first line contains two integers *n* and *k* (1<=≤<=*n*,<=*k*<=≤<=1018, *k*<=≤<=*n*) — the number of sticks drawn by Sasha and the number *k* — the number of sticks to be crossed out on each turn. | If Sasha wins, print "YES" (without quotes), otherwise print "NO" (without quotes).
You can print each letter in arbitrary case (upper of lower). | [
"1 1\n",
"10 4\n"
] | [
"YES\n",
"NO\n"
] | In the first example Sasha crosses out 1 stick, and then there are no sticks. So Lena can't make a move, and Sasha wins.
In the second example Sasha crosses out 4 sticks, then Lena crosses out 4 sticks, and after that there are only 2 sticks left. Sasha can't make a move. The players make equal number of moves, so Sas... | 500 | [
{
"input": "1 1",
"output": "YES"
},
{
"input": "10 4",
"output": "NO"
},
{
"input": "251656215122324104 164397544865601257",
"output": "YES"
},
{
"input": "963577813436662285 206326039287271924",
"output": "NO"
},
{
"input": "1000000000000000000 1",
"output":... | 1,594,109,288 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 4 | 2,000 | 6,656,000 | # Sasha and sticks
def game(n, k):
s = 0
l = 0
flag = True
while n >= k:
if flag == True:
flag = False
n -= k
s += 1
elif flag == False:
flag = True
n -= k
l += 1
if s > l:
return "YES"
return "NO"
... | Title: Sasha and Sticks
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
It's one more school day now. Sasha doesn't like classes and is always bored at them. So, each day he invents some game and plays in it alone or with friends.
Today he invented one simple game to play with Lena, with ... | ```python
# Sasha and sticks
def game(n, k):
s = 0
l = 0
flag = True
while n >= k:
if flag == True:
flag = False
n -= k
s += 1
elif flag == False:
flag = True
n -= k
l += 1
if s > l:
return "YES"
retu... | 0 | |
32 | A | Reconnaissance | PROGRAMMING | 800 | [
"brute force"
] | A. Reconnaissance | 2 | 256 | According to the regulations of Berland's army, a reconnaissance unit should consist of exactly two soldiers. Since these two soldiers shouldn't differ much, their heights can differ by at most *d* centimeters. Captain Bob has *n* soldiers in his detachment. Their heights are *a*1,<=*a*2,<=...,<=*a**n* centimeters. Som... | The first line contains two integers *n* and *d* (1<=≤<=*n*<=≤<=1000,<=1<=≤<=*d*<=≤<=109) — amount of soldiers in Bob's detachment and the maximum allowed height difference respectively. The second line contains *n* space-separated integers — heights of all the soldiers in Bob's detachment. These numbers don't exceed 1... | Output one number — amount of ways to form a reconnaissance unit of two soldiers, whose height difference doesn't exceed *d*. | [
"5 10\n10 20 50 60 65\n",
"5 1\n55 30 29 31 55\n"
] | [
"6\n",
"6\n"
] | none | 500 | [
{
"input": "5 10\n10 20 50 60 65",
"output": "6"
},
{
"input": "5 1\n55 30 29 31 55",
"output": "6"
},
{
"input": "6 10\n4 6 4 1 9 3",
"output": "30"
},
{
"input": "7 100\n19 1694 261 162 1 234 513",
"output": "8"
},
{
"input": "8 42\n37 53 74 187 568 22 5 65",
... | 1,626,306,138 | 2,147,483,647 | Python 3 | OK | TESTS | 32 | 1,028 | 45,363,200 | from itertools import permutations
a,b=map(int,input().split())
c=list(map(int,input().split()))
d=permutations(c,2)
s=0
for (x,y) in list(d):
if abs(x-y)<=b:
s=s+1
print(s)
| Title: Reconnaissance
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
According to the regulations of Berland's army, a reconnaissance unit should consist of exactly two soldiers. Since these two soldiers shouldn't differ much, their heights can differ by at most *d* centimeters. Captain Bob h... | ```python
from itertools import permutations
a,b=map(int,input().split())
c=list(map(int,input().split()))
d=permutations(c,2)
s=0
for (x,y) in list(d):
if abs(x-y)<=b:
s=s+1
print(s)
``` | 3.658504 |
923 | A | Primal Sport | PROGRAMMING | 1,700 | [
"math",
"number theory"
] | null | null | Alice and Bob begin their day with a quick game. They first choose a starting number *X*0<=≥<=3 and try to reach one million by the process described below.
Alice goes first and then they take alternating turns. In the *i*-th turn, the player whose turn it is selects a prime number smaller than the current number, an... | The input contains a single integer *X*2 (4<=≤<=*X*2<=≤<=106). It is guaranteed that the integer *X*2 is composite, that is, is not prime. | Output a single integer — the minimum possible *X*0. | [
"14\n",
"20\n",
"8192\n"
] | [
"6\n",
"15\n",
"8191\n"
] | In the first test, the smallest possible starting number is *X*<sub class="lower-index">0</sub> = 6. One possible course of the game is as follows:
- Alice picks prime 5 and announces *X*<sub class="lower-index">1</sub> = 10 - Bob picks prime 7 and announces *X*<sub class="lower-index">2</sub> = 14.
In the second ... | 500 | [
{
"input": "14",
"output": "6"
},
{
"input": "20",
"output": "15"
},
{
"input": "8192",
"output": "8191"
},
{
"input": "1000000",
"output": "998677"
},
{
"input": "959806",
"output": "239958"
},
{
"input": "1452",
"output": "1206"
},
{
"inp... | 1,626,181,621 | 2,147,483,647 | PyPy 3 | TIME_LIMIT_EXCEEDED | TESTS | 4 | 1,500 | 30,105,600 | import sys
from math import floor, sqrt
#comment these out later
#sys.stdin = open("in.in", "r")
#sys.stdout = open("out.out", "w")
def main():
def prime_sieve(n):
"""returns a sieve of primes >= 5 and < n"""
flag = n % 6 == 2
sieve = bytearray((n // 3 + flag >> 3) + 1)
... | Title: Primal Sport
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Alice and Bob begin their day with a quick game. They first choose a starting number *X*0<=≥<=3 and try to reach one million by the process described below.
Alice goes first and then they take alternating turns. In the *... | ```python
import sys
from math import floor, sqrt
#comment these out later
#sys.stdin = open("in.in", "r")
#sys.stdout = open("out.out", "w")
def main():
def prime_sieve(n):
"""returns a sieve of primes >= 5 and < n"""
flag = n % 6 == 2
sieve = bytearray((n // 3 + flag >> 3) +... | 0 | |
598 | D | Igor In the Museum | PROGRAMMING | 1,700 | [
"dfs and similar",
"graphs",
"shortest paths"
] | null | null | Igor is in the museum and he wants to see as many pictures as possible.
Museum can be represented as a rectangular field of *n*<=×<=*m* cells. Each cell is either empty or impassable. Empty cells are marked with '.', impassable cells are marked with '*'. Every two adjacent cells of different types (one empty and one i... | First line of the input contains three integers *n*, *m* and *k* (3<=≤<=*n*,<=*m*<=≤<=1000,<=1<=≤<=*k*<=≤<=*min*(*n*·*m*,<=100<=000)) — the museum dimensions and the number of starting positions to process.
Each of the next *n* lines contains *m* symbols '.', '*' — the description of the museum. It is guaranteed that ... | Print *k* integers — the maximum number of pictures, that Igor can see if he starts in corresponding position. | [
"5 6 3\n******\n*..*.*\n******\n*....*\n******\n2 2\n2 5\n4 3\n",
"4 4 1\n****\n*..*\n*.**\n****\n3 2\n"
] | [
"6\n4\n10\n",
"8\n"
] | none | 0 | [
{
"input": "5 6 3\n******\n*..*.*\n******\n*....*\n******\n2 2\n2 5\n4 3",
"output": "6\n4\n10"
},
{
"input": "4 4 1\n****\n*..*\n*.**\n****\n3 2",
"output": "8"
},
{
"input": "3 3 1\n***\n*.*\n***\n2 2",
"output": "4"
},
{
"input": "5 5 10\n*****\n*...*\n*..**\n*.***\n*****\... | 1,682,532,218 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 10 | 1,000 | 14,438,400 | def max_pictures(n, m, k, museu, posicoes):
direcoes = [(0, 1), (0, -1), (1, 0), (-1, 0)]
visitado = [[False for _ in range(m)] for __ in range(n)]
tamanhoArray = [[0 for _ in range(m)] for __ in range(n)]
idArray = [[-1 for _ in range(m)] for __ in range(n)]
fotosArray = []
idAtual = 0
def... | Title: Igor In the Museum
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Igor is in the museum and he wants to see as many pictures as possible.
Museum can be represented as a rectangular field of *n*<=×<=*m* cells. Each cell is either empty or impassable. Empty cells are marked with '.'... | ```python
def max_pictures(n, m, k, museu, posicoes):
direcoes = [(0, 1), (0, -1), (1, 0), (-1, 0)]
visitado = [[False for _ in range(m)] for __ in range(n)]
tamanhoArray = [[0 for _ in range(m)] for __ in range(n)]
idArray = [[-1 for _ in range(m)] for __ in range(n)]
fotosArray = []
idAtual = ... | 0 | |
702 | C | Cellular Network | PROGRAMMING | 1,500 | [
"binary search",
"implementation",
"two pointers"
] | null | null | You are given *n* points on the straight line — the positions (*x*-coordinates) of the cities and *m* points on the same line — the positions (*x*-coordinates) of the cellular towers. All towers work in the same way — they provide cellular network for all cities, which are located at the distance which is no more than ... | The first line contains two positive integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=105) — the number of cities and the number of cellular towers.
The second line contains a sequence of *n* integers *a*1,<=*a*2,<=...,<=*a**n* (<=-<=109<=≤<=*a**i*<=≤<=109) — the coordinates of cities. It is allowed that there are any number... | Print minimal *r* so that each city will be covered by cellular network. | [
"3 2\n-2 2 4\n-3 0\n",
"5 3\n1 5 10 14 17\n4 11 15\n"
] | [
"4\n",
"3\n"
] | none | 0 | [
{
"input": "3 2\n-2 2 4\n-3 0",
"output": "4"
},
{
"input": "5 3\n1 5 10 14 17\n4 11 15",
"output": "3"
},
{
"input": "1 1\n-1000000000\n1000000000",
"output": "2000000000"
},
{
"input": "1 1\n1000000000\n-1000000000",
"output": "2000000000"
},
{
"input": "10 10\n... | 1,675,437,929 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 32 | 187 | 45,363,200 | import bisect
input()
cities = list(map(int, input().split()))
towers = list(map(int, input().split()))
print(max([min([abs(x-c) for x in towers[bisect.bisect(towers, c) - 1 * (bisect.bisect(towers, c) != 0):bisect.bisect(towers, c) + 2] ], default = 0) for c in cities]))
| Title: Cellular Network
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given *n* points on the straight line — the positions (*x*-coordinates) of the cities and *m* points on the same line — the positions (*x*-coordinates) of the cellular towers. All towers work in the same way — ... | ```python
import bisect
input()
cities = list(map(int, input().split()))
towers = list(map(int, input().split()))
print(max([min([abs(x-c) for x in towers[bisect.bisect(towers, c) - 1 * (bisect.bisect(towers, c) != 0):bisect.bisect(towers, c) + 2] ], default = 0) for c in cities]))
``` | 3 | |
315 | A | Sereja and Bottles | PROGRAMMING | 1,400 | [
"brute force"
] | null | null | Sereja and his friends went to a picnic. The guys had *n* soda bottles just for it. Sereja forgot the bottle opener as usual, so the guys had to come up with another way to open bottles.
Sereja knows that the *i*-th bottle is from brand *a**i*, besides, you can use it to open other bottles of brand *b**i*. You can use... | The first line contains integer *n* (1<=≤<=*n*<=≤<=100) — the number of bottles. The next *n* lines contain the bottles' description. The *i*-th line contains two integers *a**i*,<=*b**i* (1<=≤<=*a**i*,<=*b**i*<=≤<=1000) — the description of the *i*-th bottle. | In a single line print a single integer — the answer to the problem. | [
"4\n1 1\n2 2\n3 3\n4 4\n",
"4\n1 2\n2 3\n3 4\n4 1\n"
] | [
"4\n",
"0\n"
] | none | 500 | [
{
"input": "4\n1 1\n2 2\n3 3\n4 4",
"output": "4"
},
{
"input": "4\n1 2\n2 3\n3 4\n4 1",
"output": "0"
},
{
"input": "3\n2 828\n4 392\n4 903",
"output": "3"
},
{
"input": "4\n2 3\n1 772\n3 870\n3 668",
"output": "2"
},
{
"input": "5\n1 4\n6 6\n4 3\n3 4\n4 758",
... | 1,548,067,896 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 186 | 0 | n=int(input())
l=[]
t=[0]*(1001)
for i in range(n):
l+=[list(map(int,input().split()))]
t=[i[1] for i in l]
c=0
for i in range(n):
if t.count(l[i][0])!=1:
c+=1
elif t.index(l[i][0])!=i:
c+=1
print(n-c) | Title: Sereja and Bottles
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Sereja and his friends went to a picnic. The guys had *n* soda bottles just for it. Sereja forgot the bottle opener as usual, so the guys had to come up with another way to open bottles.
Sereja knows that the *i*-th... | ```python
n=int(input())
l=[]
t=[0]*(1001)
for i in range(n):
l+=[list(map(int,input().split()))]
t=[i[1] for i in l]
c=0
for i in range(n):
if t.count(l[i][0])!=1:
c+=1
elif t.index(l[i][0])!=i:
c+=1
print(n-c)
``` | 0 | |
659 | A | Round House | PROGRAMMING | 1,000 | [
"implementation",
"math"
] | null | null | Vasya lives in a round building, whose entrances are numbered sequentially by integers from 1 to *n*. Entrance *n* and entrance 1 are adjacent.
Today Vasya got bored and decided to take a walk in the yard. Vasya lives in entrance *a* and he decided that during his walk he will move around the house *b* entrances in th... | The single line of the input contains three space-separated integers *n*, *a* and *b* (1<=≤<=*n*<=≤<=100,<=1<=≤<=*a*<=≤<=*n*,<=<=-<=100<=≤<=*b*<=≤<=100) — the number of entrances at Vasya's place, the number of his entrance and the length of his walk, respectively. | Print a single integer *k* (1<=≤<=*k*<=≤<=*n*) — the number of the entrance where Vasya will be at the end of his walk. | [
"6 2 -5\n",
"5 1 3\n",
"3 2 7\n"
] | [
"3\n",
"4\n",
"3\n"
] | The first example is illustrated by the picture in the statements. | 500 | [
{
"input": "6 2 -5",
"output": "3"
},
{
"input": "5 1 3",
"output": "4"
},
{
"input": "3 2 7",
"output": "3"
},
{
"input": "1 1 0",
"output": "1"
},
{
"input": "1 1 -1",
"output": "1"
},
{
"input": "1 1 1",
"output": "1"
},
{
"input": "100 ... | 1,624,893,882 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 8 | 93 | 0 | n,a,b=map(int,input().split())
if(n==1):
print(1)
else:
if(b>=0):
x=(abs(b))%n
print(a+x)
else:
x=n-((abs(b))%n)
print(a+x) | Title: Round House
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya lives in a round building, whose entrances are numbered sequentially by integers from 1 to *n*. Entrance *n* and entrance 1 are adjacent.
Today Vasya got bored and decided to take a walk in the yard. Vasya lives in e... | ```python
n,a,b=map(int,input().split())
if(n==1):
print(1)
else:
if(b>=0):
x=(abs(b))%n
print(a+x)
else:
x=n-((abs(b))%n)
print(a+x)
``` | 0 | |
166 | E | Tetrahedron | PROGRAMMING | 1,500 | [
"dp",
"math",
"matrices"
] | null | null | You are given a tetrahedron. Let's mark its vertices with letters *A*, *B*, *C* and *D* correspondingly.
An ant is standing in the vertex *D* of the tetrahedron. The ant is quite active and he wouldn't stay idle. At each moment of time he makes a step from one vertex to another one along some edge of the tetrahedron. ... | The first line contains the only integer *n* (1<=≤<=*n*<=≤<=107) — the required length of the cyclic path. | Print the only integer — the required number of ways modulo 1000000007 (109<=+<=7). | [
"2\n",
"4\n"
] | [
"3\n",
"21\n"
] | The required paths in the first sample are:
- *D* - *A* - *D* - *D* - *B* - *D* - *D* - *C* - *D* | 1,000 | [
{
"input": "2",
"output": "3"
},
{
"input": "4",
"output": "21"
},
{
"input": "1",
"output": "0"
},
{
"input": "3",
"output": "6"
},
{
"input": "5",
"output": "60"
},
{
"input": "6",
"output": "183"
},
{
"input": "7",
"output": "546"
... | 1,665,632,420 | 2,147,483,647 | Python 3 | OK | TESTS | 36 | 92 | 0 | n = int(input())
mod = 1000000007
print(int((pow(3, n, 4 * mod) + 3 * (-1)**n) / 4) % (4 * mod)) | Title: Tetrahedron
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given a tetrahedron. Let's mark its vertices with letters *A*, *B*, *C* and *D* correspondingly.
An ant is standing in the vertex *D* of the tetrahedron. The ant is quite active and he wouldn't stay idle. At each m... | ```python
n = int(input())
mod = 1000000007
print(int((pow(3, n, 4 * mod) + 3 * (-1)**n) / 4) % (4 * mod))
``` | 3 | |
960 | A | Check the string | PROGRAMMING | 1,200 | [
"implementation"
] | null | null | A has a string consisting of some number of lowercase English letters 'a'. He gives it to his friend B who appends some number of letters 'b' to the end of this string. Since both A and B like the characters 'a' and 'b', they have made sure that at this point, at least one 'a' and one 'b' exist in the string.
B now gi... | The first and only line consists of a string $S$ ($ 1 \le |S| \le 5\,000 $). It is guaranteed that the string will only consist of the lowercase English letters 'a', 'b', 'c'. | Print "YES" or "NO", according to the condition. | [
"aaabccc\n",
"bbacc\n",
"aabc\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | Consider first example: the number of 'c' is equal to the number of 'a'.
Consider second example: although the number of 'c' is equal to the number of the 'b', the order is not correct.
Consider third example: the number of 'c' is equal to the number of 'b'. | 500 | [
{
"input": "aaabccc",
"output": "YES"
},
{
"input": "bbacc",
"output": "NO"
},
{
"input": "aabc",
"output": "YES"
},
{
"input": "aabbcc",
"output": "YES"
},
{
"input": "aaacccbb",
"output": "NO"
},
{
"input": "abc",
"output": "YES"
},
{
"in... | 1,523,120,637 | 3,537 | Python 3 | SKIPPED | TESTS | 55 | 93 | 7,065,600 | a=str(input())
ca=0
cc=0
cb=0
k=0
if(len(a)==0):
print("NO")
exit()
else:
if(a[0]=='a'):
for i in range(len(a)):
if(a[i]=='a'):
ca=ca+1
else:
k=i
break
for j in range(k,len(a)):
if(a[j]=='b'):
cb=cb+1
else:
k=j
break
for t in range(k,len(a)):
if(a[t]=='c'):
cc=cc+1
... | Title: Check the string
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A has a string consisting of some number of lowercase English letters 'a'. He gives it to his friend B who appends some number of letters 'b' to the end of this string. Since both A and B like the characters 'a' and 'b... | ```python
a=str(input())
ca=0
cc=0
cb=0
k=0
if(len(a)==0):
print("NO")
exit()
else:
if(a[0]=='a'):
for i in range(len(a)):
if(a[i]=='a'):
ca=ca+1
else:
k=i
break
for j in range(k,len(a)):
if(a[j]=='b'):
cb=cb+1
else:
k=j
break
for t in range(k,len(a)):
if(a[t]=='c'):
... | -1 | |
235 | A | LCM Challenge | PROGRAMMING | 1,600 | [
"number theory"
] | null | null | Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big number with it.
But I also don't want to use many numbers, so I'll choose three positive integers (they don't have to be distinct) which are not greater than *n*. Can you help me to find ... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=106) — the *n* mentioned in the statement. | Print a single integer — the maximum possible LCM of three not necessarily distinct positive integers that are not greater than *n*. | [
"9\n",
"7\n"
] | [
"504\n",
"210\n"
] | The least common multiple of some positive integers is the least positive integer which is multiple for each of them.
The result may become very large, 32-bit integer won't be enough. So using 64-bit integers is recommended.
For the last example, we can chose numbers 7, 6, 5 and the LCM of them is 7·6·5 = 210. It is ... | 500 | [
{
"input": "9",
"output": "504"
},
{
"input": "7",
"output": "210"
},
{
"input": "1",
"output": "1"
},
{
"input": "5",
"output": "60"
},
{
"input": "6",
"output": "60"
},
{
"input": "33",
"output": "32736"
},
{
"input": "21",
"output": ... | 1,644,938,525 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 60 | 0 | import math
def ans(a,b,c):
return abs(a*b*c)//math.gcd(a,b,c)
def lcm_challenge():
a=int(input())
if a>3:print(ans(a,a-1,a-2))
else:print(0)
lcm_challenge() | Title: LCM Challenge
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big number with it.
But I also don't want to use many numbers, so I'll choose three positive... | ```python
import math
def ans(a,b,c):
return abs(a*b*c)//math.gcd(a,b,c)
def lcm_challenge():
a=int(input())
if a>3:print(ans(a,a-1,a-2))
else:print(0)
lcm_challenge()
``` | -1 | |
574 | B | Bear and Three Musketeers | PROGRAMMING | 1,500 | [
"brute force",
"dfs and similar",
"graphs",
"hashing"
] | null | null | Do you know a story about the three musketeers? Anyway, you will learn about its origins now.
Richelimakieu is a cardinal in the city of Bearis. He is tired of dealing with crime by himself. He needs three brave warriors to help him to fight against bad guys.
There are *n* warriors. Richelimakieu wants to choose thre... | The first line contains two space-separated integers, *n* and *m* (3<=≤<=*n*<=≤<=4000, 0<=≤<=*m*<=≤<=4000) — respectively number of warriors and number of pairs of warriors knowing each other.
*i*-th of the following *m* lines contains two space-separated integers *a**i* and *b**i* (1<=≤<=*a**i*,<=*b**i*<=≤<=*n*, *a**... | If Richelimakieu can choose three musketeers, print the minimum possible sum of their recognitions. Otherwise, print "-1" (without the quotes). | [
"5 6\n1 2\n1 3\n2 3\n2 4\n3 4\n4 5\n",
"7 4\n2 1\n3 6\n5 1\n1 7\n"
] | [
"2\n",
"-1\n"
] | In the first sample Richelimakieu should choose a triple 1, 2, 3. The first musketeer doesn't know anyone except other two musketeers so his recognition is 0. The second musketeer has recognition 1 because he knows warrior number 4. The third musketeer also has recognition 1 because he knows warrior 4. Sum of recogniti... | 1,000 | [
{
"input": "5 6\n1 2\n1 3\n2 3\n2 4\n3 4\n4 5",
"output": "2"
},
{
"input": "7 4\n2 1\n3 6\n5 1\n1 7",
"output": "-1"
},
{
"input": "5 0",
"output": "-1"
},
{
"input": "7 14\n3 6\n2 3\n5 2\n5 6\n7 5\n7 4\n6 2\n3 5\n7 1\n4 1\n6 1\n7 6\n6 4\n5 4",
"output": "5"
},
{
... | 1,585,389,421 | 2,147,483,647 | PyPy 3 | OK | TESTS | 40 | 249 | 5,324,800 | from sys import stdin,stdout
input = stdin.readline
n,m = map(int,input().split())
graph = [set([]) for i in range(n+1)]
popularity = [0 for i in range(n+1)]
connections = []
for _ in range(m):
x,y = map(int,input().split())
graph[x].add(y)
graph[y].add(x)
connections.append((x,y))
p... | Title: Bear and Three Musketeers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Do you know a story about the three musketeers? Anyway, you will learn about its origins now.
Richelimakieu is a cardinal in the city of Bearis. He is tired of dealing with crime by himself. He needs three br... | ```python
from sys import stdin,stdout
input = stdin.readline
n,m = map(int,input().split())
graph = [set([]) for i in range(n+1)]
popularity = [0 for i in range(n+1)]
connections = []
for _ in range(m):
x,y = map(int,input().split())
graph[x].add(y)
graph[y].add(x)
connections.append((x,... | 3 | |
645 | A | Amity Assessment | PROGRAMMING | 1,200 | [
"brute force",
"constructive algorithms",
"implementation"
] | null | null | Bessie the cow and her best friend Elsie each received a sliding puzzle on Pi Day. Their puzzles consist of a 2<=×<=2 grid and three tiles labeled 'A', 'B', and 'C'. The three tiles sit on top of the grid, leaving one grid cell empty. To make a move, Bessie or Elsie can slide a tile adjacent to the empty cell into the ... | The first two lines of the input consist of a 2<=×<=2 grid describing the initial configuration of Bessie's puzzle. The next two lines contain a 2<=×<=2 grid describing the initial configuration of Elsie's puzzle. The positions of the tiles are labeled 'A', 'B', and 'C', while the empty cell is labeled 'X'. It's guaran... | Output "YES"(without quotes) if the puzzles can reach the same configuration (and Bessie and Elsie are truly BFFLs). Otherwise, print "NO" (without quotes). | [
"AB\nXC\nXB\nAC\n",
"AB\nXC\nAC\nBX\n"
] | [
"YES\n",
"NO\n"
] | The solution to the first sample is described by the image. All Bessie needs to do is slide her 'A' tile down.
In the second sample, the two puzzles can never be in the same configuration. Perhaps Bessie and Elsie are not meant to be friends after all... | 500 | [
{
"input": "AB\nXC\nXB\nAC",
"output": "YES"
},
{
"input": "AB\nXC\nAC\nBX",
"output": "NO"
},
{
"input": "XC\nBA\nCB\nAX",
"output": "NO"
},
{
"input": "AB\nXC\nAX\nCB",
"output": "YES"
},
{
"input": "CB\nAX\nXA\nBC",
"output": "YES"
},
{
"input": "BC... | 1,458,398,620 | 2,147,483,647 | Python 3 | OK | TESTS | 102 | 155 | 6,348,800 | import math, re, sys, string, operator, functools, fractions, collections
sys.setrecursionlimit(10**7)
RI=lambda x=' ': list(map(int,input().split(x)))
RS=lambda x=' ': input().rstrip().split(x)
dX= [-1, 1, 0, 0,-1, 1,-1, 1]
dY= [ 0, 0,-1, 1, 1,-1,-1, 1]
mod=int(1e9+7)
eps=1e-6
pi=math.acos(-1.0)
MAX=20
###############... | Title: Amity Assessment
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Bessie the cow and her best friend Elsie each received a sliding puzzle on Pi Day. Their puzzles consist of a 2<=×<=2 grid and three tiles labeled 'A', 'B', and 'C'. The three tiles sit on top of the grid, leaving one ... | ```python
import math, re, sys, string, operator, functools, fractions, collections
sys.setrecursionlimit(10**7)
RI=lambda x=' ': list(map(int,input().split(x)))
RS=lambda x=' ': input().rstrip().split(x)
dX= [-1, 1, 0, 0,-1, 1,-1, 1]
dY= [ 0, 0,-1, 1, 1,-1,-1, 1]
mod=int(1e9+7)
eps=1e-6
pi=math.acos(-1.0)
MAX=20
#####... | 3 | |
59 | A | Word | PROGRAMMING | 800 | [
"implementation",
"strings"
] | A. Word | 2 | 256 | Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it either only consisted of lowercase letters or, vice versa, only of uppercase ones. At th... | The first line contains a word *s* — it consists of uppercase and lowercase Latin letters and possesses the length from 1 to 100. | Print the corrected word *s*. If the given word *s* has strictly more uppercase letters, make the word written in the uppercase register, otherwise - in the lowercase one. | [
"HoUse\n",
"ViP\n",
"maTRIx\n"
] | [
"house\n",
"VIP\n",
"matrix\n"
] | none | 500 | [
{
"input": "HoUse",
"output": "house"
},
{
"input": "ViP",
"output": "VIP"
},
{
"input": "maTRIx",
"output": "matrix"
},
{
"input": "BNHWpnpawg",
"output": "bnhwpnpawg"
},
{
"input": "VTYGP",
"output": "VTYGP"
},
{
"input": "CHNenu",
"output": "chn... | 1,653,600,207 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 92 | 0 | s = list(input())
cu = 0
cl = 0
for x in s:
if ord(x) >= 97:
cl += 1
else:
cu += 1
s =''.join(s)
if cl >= cu:
print(s.lower())
else:
print(s.upper())
| Title: Word
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it ei... | ```python
s = list(input())
cu = 0
cl = 0
for x in s:
if ord(x) >= 97:
cl += 1
else:
cu += 1
s =''.join(s)
if cl >= cu:
print(s.lower())
else:
print(s.upper())
``` | 3.977 |
110 | A | Nearly Lucky Number | PROGRAMMING | 800 | [
"implementation"
] | A. Nearly Lucky Number | 2 | 256 | Petya loves lucky numbers. We all know that lucky numbers are the positive integers whose decimal representations contain only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.
Unfortunately, not all numbers are lucky. Petya calls a number nearly lucky if the number of lucky d... | The only line contains an integer *n* (1<=≤<=*n*<=≤<=1018).
Please do not use the %lld specificator to read or write 64-bit numbers in С++. It is preferred to use the cin, cout streams or the %I64d specificator. | Print on the single line "YES" if *n* is a nearly lucky number. Otherwise, print "NO" (without the quotes). | [
"40047\n",
"7747774\n",
"1000000000000000000\n"
] | [
"NO\n",
"YES\n",
"NO\n"
] | In the first sample there are 3 lucky digits (first one and last two), so the answer is "NO".
In the second sample there are 7 lucky digits, 7 is lucky number, so the answer is "YES".
In the third sample there are no lucky digits, so the answer is "NO". | 500 | [
{
"input": "40047",
"output": "NO"
},
{
"input": "7747774",
"output": "YES"
},
{
"input": "1000000000000000000",
"output": "NO"
},
{
"input": "7",
"output": "NO"
},
{
"input": "4",
"output": "NO"
},
{
"input": "474404774",
"output": "NO"
},
{
... | 1,699,166,131 | 2,147,483,647 | Python 3 | OK | TESTS | 34 | 92 | 0 | s = input()
c = 0
for char in s:
if char == '7' or char == '4':
c += 1
if c == 7 or c == 4:
print("YES")
else:
print("NO")
| Title: Nearly Lucky Number
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Petya loves lucky numbers. We all know that lucky numbers are the positive integers whose decimal representations contain only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.
... | ```python
s = input()
c = 0
for char in s:
if char == '7' or char == '4':
c += 1
if c == 7 or c == 4:
print("YES")
else:
print("NO")
``` | 3.977 |
911 | A | Nearest Minimums | PROGRAMMING | 1,100 | [
"implementation"
] | null | null | You are given an array of *n* integer numbers *a*0,<=*a*1,<=...,<=*a**n*<=-<=1. Find the distance between two closest (nearest) minimums in it. It is guaranteed that in the array a minimum occurs at least two times. | The first line contains positive integer *n* (2<=≤<=*n*<=≤<=105) — size of the given array. The second line contains *n* integers *a*0,<=*a*1,<=...,<=*a**n*<=-<=1 (1<=≤<=*a**i*<=≤<=109) — elements of the array. It is guaranteed that in the array a minimum occurs at least two times. | Print the only number — distance between two nearest minimums in the array. | [
"2\n3 3\n",
"3\n5 6 5\n",
"9\n2 1 3 5 4 1 2 3 1\n"
] | [
"1\n",
"2\n",
"3\n"
] | none | 0 | [
{
"input": "2\n3 3",
"output": "1"
},
{
"input": "3\n5 6 5",
"output": "2"
},
{
"input": "9\n2 1 3 5 4 1 2 3 1",
"output": "3"
},
{
"input": "6\n4 6 7 8 6 4",
"output": "5"
},
{
"input": "2\n1000000000 1000000000",
"output": "1"
},
{
"input": "42\n1 1 ... | 1,515,145,954 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 46 | 5,529,600 | n = int(input())
a = list(map(int, input().split()))
m = min(a)
ind_m = []
for i in range(len(a)):
if a[i] == m:
ind_m.append(i)
ind_m.sort()
res = 10000
print(ind_m)
for i in range(len(ind_m)-1):
if (ind_m[i+1] - ind_m[i]) < res:
res = ind_m[i+1] - ind_m[i]
print(res)
| Title: Nearest Minimums
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given an array of *n* integer numbers *a*0,<=*a*1,<=...,<=*a**n*<=-<=1. Find the distance between two closest (nearest) minimums in it. It is guaranteed that in the array a minimum occurs at least two times.
I... | ```python
n = int(input())
a = list(map(int, input().split()))
m = min(a)
ind_m = []
for i in range(len(a)):
if a[i] == m:
ind_m.append(i)
ind_m.sort()
res = 10000
print(ind_m)
for i in range(len(ind_m)-1):
if (ind_m[i+1] - ind_m[i]) < res:
res = ind_m[i+1] - ind_m[i]
print(res)
``` | 0 | |
300 | A | Array | PROGRAMMING | 1,100 | [
"brute force",
"constructive algorithms",
"implementation"
] | null | null | Vitaly has an array of *n* distinct integers. Vitaly wants to divide this array into three non-empty sets so as the following conditions hold:
1. The product of all numbers in the first set is less than zero (<=<<=0). 1. The product of all numbers in the second set is greater than zero (<=><=0). 1. The produ... | The first line of the input contains integer *n* (3<=≤<=*n*<=≤<=100). The second line contains *n* space-separated distinct integers *a*1,<=*a*2,<=...,<=*a**n* (|*a**i*|<=≤<=103) — the array elements. | In the first line print integer *n*1 (*n*1<=><=0) — the number of elements in the first set. Then print *n*1 numbers — the elements that got to the first set.
In the next line print integer *n*2 (*n*2<=><=0) — the number of elements in the second set. Then print *n*2 numbers — the elements that got to the second... | [
"3\n-1 2 0\n",
"4\n-1 -2 -3 0\n"
] | [
"1 -1\n1 2\n1 0\n",
"1 -1\n2 -3 -2\n1 0\n"
] | none | 500 | [
{
"input": "3\n-1 2 0",
"output": "1 -1\n1 2\n1 0"
},
{
"input": "4\n-1 -2 -3 0",
"output": "1 -1\n2 -3 -2\n1 0"
},
{
"input": "5\n-1 -2 1 2 0",
"output": "1 -1\n2 1 2\n2 0 -2"
},
{
"input": "100\n-64 -51 -75 -98 74 -26 -1 -8 -99 -76 -53 -80 -43 -22 -100 -62 -34 -5 -65 -81 -1... | 1,611,436,600 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 92 | 307,200 | # Input
arrayLen = int(input())
a_array = list(map(int, input().split()))
# Created variables
negativeNums = 0
first_array = []
second_array = []
third_array = []
for x in range(arrayLen):
if(a_array[x] < 0):
negativeNums = negativeNums + 1
negativeToFirst = negativeNums % 2
for x in range(arrayLen):
... | Title: Array
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vitaly has an array of *n* distinct integers. Vitaly wants to divide this array into three non-empty sets so as the following conditions hold:
1. The product of all numbers in the first set is less than zero (<=<<=0). 1. T... | ```python
# Input
arrayLen = int(input())
a_array = list(map(int, input().split()))
# Created variables
negativeNums = 0
first_array = []
second_array = []
third_array = []
for x in range(arrayLen):
if(a_array[x] < 0):
negativeNums = negativeNums + 1
negativeToFirst = negativeNums % 2
for x in range(arr... | 0 | |
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... | 1,688,956,045 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | #include<iostream>
using namespace std;
long long Findnum(long long n)
{
long long i = 1;
while (n > i)
{
n -= i;
i++;
}
if (n < i)
{
return n;
}
else
{
return i;
}
}
int main()
{
long long n;
cin >> n;
cout << Findnum(n) << endl;
return 0;
}
| 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
#include<iostream>
using namespace std;
long long Findnum(long long n)
{
long long i = 1;
while (n > i)
{
n -= i;
i++;
}
if (n < i)
{
return n;
}
else
{
return i;
}
}
int main()
{
long long n;
cin >> n;
cout << Findnum(n) << endl;
return 0;
}
``` | -1 | |
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":... | 1,687,845,612 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | n=int(input())
for i in range(t):
x=str(input())
sum=0
for i in x:
if(len(x)>10):
sum=x[0] + str(len(x) - 2) + x[-1]
else:
print(x) | 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())
for i in range(t):
x=str(input())
sum=0
for i in x:
if(len(x)>10):
sum=x[0] + str(len(x) - 2) + x[-1]
else:
print(x)
``` | -1 |
330 | A | Cakeminator | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | You are given a rectangular cake, represented as an *r*<=×<=*c* grid. Each cell either has an evil strawberry, or is empty. For example, a 3<=×<=4 cake may look as follows:
The cakeminator is going to eat the cake! Each time he eats, he chooses a row or a column that does not contain any evil strawberries and contains... | The first line contains two integers *r* and *c* (2<=≤<=*r*,<=*c*<=≤<=10), denoting the number of rows and the number of columns of the cake. The next *r* lines each contains *c* characters — the *j*-th character of the *i*-th line denotes the content of the cell at row *i* and column *j*, and is either one of these:
... | Output the maximum number of cake cells that the cakeminator can eat. | [
"3 4\nS...\n....\n..S.\n"
] | [
"8\n"
] | For the first example, one possible way to eat the maximum number of cake cells is as follows (perform 3 eats). | 500 | [
{
"input": "3 4\nS...\n....\n..S.",
"output": "8"
},
{
"input": "2 2\n..\n..",
"output": "4"
},
{
"input": "2 2\nSS\nSS",
"output": "0"
},
{
"input": "7 3\nS..\nS..\nS..\nS..\nS..\nS..\nS..",
"output": "14"
},
{
"input": "3 5\n..S..\nSSSSS\n..S..",
"output": "... | 1,627,546,587 | 2,147,483,647 | Python 3 | OK | TESTS | 42 | 154 | 6,963,200 |
r,c=map(int,input().split())
arr=[]
for i in range(r):
arr.append(input()) #input
row=[0]*r
column=[0]*c
for i in range(r):
for j in range(c):
if arr[i][j]=='S':
row[i]=1
column[j]=1
cake=0
for i in range(r):
for j in range(c):
if row[i]==0 or column... | Title: Cakeminator
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given a rectangular cake, represented as an *r*<=×<=*c* grid. Each cell either has an evil strawberry, or is empty. For example, a 3<=×<=4 cake may look as follows:
The cakeminator is going to eat the cake! Each ti... | ```python
r,c=map(int,input().split())
arr=[]
for i in range(r):
arr.append(input()) #input
row=[0]*r
column=[0]*c
for i in range(r):
for j in range(c):
if arr[i][j]=='S':
row[i]=1
column[j]=1
cake=0
for i in range(r):
for j in range(c):
if row[i]==0... | 3 | |
520 | A | Pangram | PROGRAMMING | 800 | [
"implementation",
"strings"
] | null | null | A word or a sentence in some language is called a pangram if all the characters of the alphabet of this language appear in it at least once. Pangrams are often used to demonstrate fonts in printing or test the output devices.
You are given a string consisting of lowercase and uppercase Latin letters. Check whether thi... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=100) — the number of characters in the string.
The second line contains the string. The string consists only of uppercase and lowercase Latin letters. | Output "YES", if the string is a pangram and "NO" otherwise. | [
"12\ntoosmallword\n",
"35\nTheQuickBrownFoxJumpsOverTheLazyDog\n"
] | [
"NO\n",
"YES\n"
] | none | 500 | [
{
"input": "12\ntoosmallword",
"output": "NO"
},
{
"input": "35\nTheQuickBrownFoxJumpsOverTheLazyDog",
"output": "YES"
},
{
"input": "1\na",
"output": "NO"
},
{
"input": "26\nqwertyuiopasdfghjklzxcvbnm",
"output": "YES"
},
{
"input": "26\nABCDEFGHIJKLMNOPQRSTUVWXY... | 1,697,969,372 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 59 | 62 | 0 | # Read the length of the string
n = int(input())
# Read the string
s = input()
# Create a set to store unique lowercase letters
lowercase_letters = set()
# Iterate through the string and add lowercase letters to the set
for char in s:
if char.isalpha():
lowercase_letters.add(char.lower())
... | Title: Pangram
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A word or a sentence in some language is called a pangram if all the characters of the alphabet of this language appear in it at least once. Pangrams are often used to demonstrate fonts in printing or test the output devices.
... | ```python
# Read the length of the string
n = int(input())
# Read the string
s = input()
# Create a set to store unique lowercase letters
lowercase_letters = set()
# Iterate through the string and add lowercase letters to the set
for char in s:
if char.isalpha():
lowercase_letters.add(char.lo... | 3 | |
599 | A | Patrick and Shopping | PROGRAMMING | 800 | [
"implementation"
] | null | null | Today Patrick waits for a visit from his friend Spongebob. To prepare for the visit, Patrick needs to buy some goodies in two stores located near his house. There is a *d*1 meter long road between his house and the first shop and a *d*2 meter long road between his house and the second shop. Also, there is a road of len... | The first line of the input contains three integers *d*1, *d*2, *d*3 (1<=≤<=*d*1,<=*d*2,<=*d*3<=≤<=108) — the lengths of the paths.
- *d*1 is the length of the path connecting Patrick's house and the first shop; - *d*2 is the length of the path connecting Patrick's house and the second shop; - *d*3 is the length o... | Print the minimum distance that Patrick will have to walk in order to visit both shops and return to his house. | [
"10 20 30\n",
"1 1 5\n"
] | [
"60\n",
"4\n"
] | The first sample is shown on the picture in the problem statement. One of the optimal routes is: house <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/70a0795f45d32287dba0eb83fc4a3f470c6e5537.png" style="max-width: 100.0%;max-height: 100.0%;"/> first shop <img align="middle" class="tex-form... | 500 | [
{
"input": "10 20 30",
"output": "60"
},
{
"input": "1 1 5",
"output": "4"
},
{
"input": "100 33 34",
"output": "134"
},
{
"input": "777 777 777",
"output": "2331"
},
{
"input": "2 2 8",
"output": "8"
},
{
"input": "12 34 56",
"output": "92"
},
... | 1,620,807,232 | 2,147,483,647 | Python 3 | OK | TESTS | 21 | 61 | 6,758,400 | d1,d2,d3 = map(int, input().split())
choice1 = d1+d3+d2
choice2 = d1+d1+d2+d2
choice3 = d2+d3+d1
choice4 = d2+d3+d3+d2
choice5 = d1+d3+d3+d1
print(min([choice1,choice2,choice3,choice4,choice5])) | Title: Patrick and Shopping
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Today Patrick waits for a visit from his friend Spongebob. To prepare for the visit, Patrick needs to buy some goodies in two stores located near his house. There is a *d*1 meter long road between his house and the... | ```python
d1,d2,d3 = map(int, input().split())
choice1 = d1+d3+d2
choice2 = d1+d1+d2+d2
choice3 = d2+d3+d1
choice4 = d2+d3+d3+d2
choice5 = d1+d3+d3+d1
print(min([choice1,choice2,choice3,choice4,choice5]))
``` | 3 | |
697 | B | Barnicle | PROGRAMMING | 1,400 | [
"brute force",
"implementation",
"math",
"strings"
] | null | null | Barney is standing in a bar and starring at a pretty girl. He wants to shoot her with his heart arrow but he needs to know the distance between him and the girl to make his shot accurate.
Barney asked the bar tender Carl about this distance value, but Carl was so busy talking to the customers so he wrote the distance ... | The first and only line of input contains a single string of form *a*.*deb* where *a*, *d* and *b* are integers and *e* is usual character 'e' (0<=≤<=*a*<=≤<=9,<=0<=≤<=*d*<=<<=10100,<=0<=≤<=*b*<=≤<=100) — the scientific notation of the desired distance value.
*a* and *b* contain no leading zeros and *d* contains no... | Print the only real number *x* (the desired distance value) in the only line in its decimal notation.
Thus if *x* is an integer, print it's integer value without decimal part and decimal point and without leading zeroes.
Otherwise print *x* in a form of *p*.*q* such that *p* is an integer that have no leading zeroe... | [
"8.549e2\n",
"8.549e3\n",
"0.33e0\n"
] | [
"854.9\n",
"8549\n",
"0.33\n"
] | none | 1,000 | [
{
"input": "8.549e2",
"output": "854.9"
},
{
"input": "8.549e3",
"output": "8549"
},
{
"input": "0.33e0",
"output": "0.33"
},
{
"input": "1.31e1",
"output": "13.1"
},
{
"input": "1.038e0",
"output": "1.038"
},
{
"input": "8.25983e5",
"output": "825... | 1,672,656,814 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 28 | 92 | 0 | x=input()
y=""
d=0
for i in range(len(x)):
if x[i]=="e":
d=int(x[i+1:])
break
if x[i].isnumeric():
y+=x[i]
l=len(y)
if l-1<=d:
y=y+"0"*(d-l+1)
print(y)
else:
s=y[:d+1]+"."+y[d+1:]
print(s) | Title: Barnicle
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Barney is standing in a bar and starring at a pretty girl. He wants to shoot her with his heart arrow but he needs to know the distance between him and the girl to make his shot accurate.
Barney asked the bar tender Carl abou... | ```python
x=input()
y=""
d=0
for i in range(len(x)):
if x[i]=="e":
d=int(x[i+1:])
break
if x[i].isnumeric():
y+=x[i]
l=len(y)
if l-1<=d:
y=y+"0"*(d-l+1)
print(y)
else:
s=y[:d+1]+"."+y[d+1:]
print(s)
``` | 0 | |
200 | B | Drinks | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | Little Vasya loves orange juice very much. That's why any food and drink in his kitchen necessarily contains orange juice. There are *n* drinks in his fridge, the volume fraction of orange juice in the *i*-th drink equals *p**i* percent.
One day Vasya decided to make himself an orange cocktail. He took equal proportio... | The first input line contains a single integer *n* (1<=≤<=*n*<=≤<=100) — the number of orange-containing drinks in Vasya's fridge. The second line contains *n* integers *p**i* (0<=≤<=*p**i*<=≤<=100) — the volume fraction of orange juice in the *i*-th drink, in percent. The numbers are separated by a space. | Print the volume fraction in percent of orange juice in Vasya's cocktail. The answer will be considered correct if the absolute or relative error does not exceed 10<=<=-<=4. | [
"3\n50 50 100\n",
"4\n0 25 50 75\n"
] | [
"66.666666666667\n",
"37.500000000000\n"
] | Note to the first sample: let's assume that Vasya takes *x* milliliters of each drink from the fridge. Then the volume of pure juice in the cocktail will equal <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/c1fac6e64d3a8ee6a5ac138cbe51e60039b22473.png" style="max-width: 100.0%;max-height: ... | 500 | [
{
"input": "3\n50 50 100",
"output": "66.666666666667"
},
{
"input": "4\n0 25 50 75",
"output": "37.500000000000"
},
{
"input": "3\n0 1 8",
"output": "3.000000000000"
},
{
"input": "5\n96 89 93 95 70",
"output": "88.600000000000"
},
{
"input": "7\n62 41 78 4 38 39... | 1,692,264,072 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 62 | 0 | n = int(input())
l = list(map(int,input().split()))
res = 0
for i in range(n):
res = res + l[i]/100
print((res/3)*100) | Title: Drinks
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little Vasya loves orange juice very much. That's why any food and drink in his kitchen necessarily contains orange juice. There are *n* drinks in his fridge, the volume fraction of orange juice in the *i*-th drink equals *p**i*... | ```python
n = int(input())
l = list(map(int,input().split()))
res = 0
for i in range(n):
res = res + l[i]/100
print((res/3)*100)
``` | 0 | |
90 | B | African Crossword | PROGRAMMING | 1,100 | [
"implementation",
"strings"
] | B. African Crossword | 2 | 256 | An African crossword is a rectangular table *n*<=×<=*m* in size. Each cell of the table contains exactly one letter. This table (it is also referred to as grid) contains some encrypted word that needs to be decoded.
To solve the crossword you should cross out all repeated letters in rows and columns. In other words, a... | The first line contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=100). Next *n* lines contain *m* lowercase Latin letters each. That is the crossword grid. | Print the encrypted word on a single line. It is guaranteed that the answer consists of at least one letter. | [
"3 3\ncba\nbcd\ncbc\n",
"5 5\nfcofd\nooedo\nafaoa\nrdcdf\neofsf\n"
] | [
"abcd",
"codeforces"
] | none | 1,000 | [
{
"input": "3 3\ncba\nbcd\ncbc",
"output": "abcd"
},
{
"input": "5 5\nfcofd\nooedo\nafaoa\nrdcdf\neofsf",
"output": "codeforces"
},
{
"input": "4 4\nusah\nusha\nhasu\nsuha",
"output": "ahhasusu"
},
{
"input": "7 5\naabcd\neffgh\niijkk\nlmnoo\npqqrs\nttuvw\nxxyyz",
"output... | 1,549,888,079 | 2,147,483,647 | Python 3 | OK | TESTS | 43 | 1,340 | 0 | # main
n, m = map(int, input().split())
word = []
out = ""
for i in range(n):
word.append(input())
for i in range(n):
for j in range(m):
x = word[i][j]
ok = True
for a in range(m):
if word[i][a] == x and a != j:
ok = False
for a in r... | Title: African Crossword
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
An African crossword is a rectangular table *n*<=×<=*m* in size. Each cell of the table contains exactly one letter. This table (it is also referred to as grid) contains some encrypted word that needs to be decoded.
To s... | ```python
# main
n, m = map(int, input().split())
word = []
out = ""
for i in range(n):
word.append(input())
for i in range(n):
for j in range(m):
x = word[i][j]
ok = True
for a in range(m):
if word[i][a] == x and a != j:
ok = False
... | 3.665 |
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... | 1,541,327,659 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 7 | 124 | 0 | d,m=(int(i) for i in input().split())
ex=[int(i) for i in input().split()]
mx=0
for i in range(d-1):
mx=max(mx,ex[i]-ex[i+1])
print(mx-m)
| 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
d,m=(int(i) for i in input().split())
ex=[int(i) for i in input().split()]
mx=0
for i in range(d-1):
mx=max(mx,ex[i]-ex[i+1])
print(mx-m)
``` | 0 | |
455 | A | Boredom | PROGRAMMING | 1,500 | [
"dp"
] | null | null | Alex doesn't like boredom. That's why whenever he gets bored, he comes up with games. One long winter evening he came up with a game and decided to play it.
Given a sequence *a* consisting of *n* integers. The player can make several steps. In a single step he can choose an element of the sequence (let's denote it *a*... | The first line contains integer *n* (1<=≤<=*n*<=≤<=105) that shows how many numbers are in Alex's sequence.
The second line contains *n* integers *a*1, *a*2, ..., *a**n* (1<=≤<=*a**i*<=≤<=105). | Print a single integer — the maximum number of points that Alex can earn. | [
"2\n1 2\n",
"3\n1 2 3\n",
"9\n1 2 1 3 2 2 2 2 3\n"
] | [
"2\n",
"4\n",
"10\n"
] | Consider the third test example. At first step we need to choose any element equal to 2. After that step our sequence looks like this [2, 2, 2, 2]. Then we do 4 steps, on each step we choose any element equals to 2. In total we earn 10 points. | 500 | [
{
"input": "2\n1 2",
"output": "2"
},
{
"input": "3\n1 2 3",
"output": "4"
},
{
"input": "9\n1 2 1 3 2 2 2 2 3",
"output": "10"
},
{
"input": "5\n3 3 4 5 4",
"output": "11"
},
{
"input": "5\n5 3 5 3 4",
"output": "16"
},
{
"input": "5\n4 2 3 2 5",
... | 1,671,195,681 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 4 | 31 | 0 | def dic(L):
X=list(set(L))
Y=dict()
for m in X:
Y[m]=0
for n in L:
Y[n]+=1
return Y
def delet(Y,ak):
del Y[ak]
if ak+1 in Y:
del Y[ak+1]
if ak-1 in Y:
del Y[ak-1]
import copy
def f(L):
Y=dic(L)
if len(L)==0:
return 0
... | Title: Boredom
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Alex doesn't like boredom. That's why whenever he gets bored, he comes up with games. One long winter evening he came up with a game and decided to play it.
Given a sequence *a* consisting of *n* integers. The player can make ... | ```python
def dic(L):
X=list(set(L))
Y=dict()
for m in X:
Y[m]=0
for n in L:
Y[n]+=1
return Y
def delet(Y,ak):
del Y[ak]
if ak+1 in Y:
del Y[ak+1]
if ak-1 in Y:
del Y[ak-1]
import copy
def f(L):
Y=dic(L)
if len(L)==0:
retu... | 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": "-... | 1,376,065,127 | 2,927 | Python 3 | WRONG_ANSWER | PRETESTS | 2 | 92 | 0 | x, y = map(int, input().split())
x1, x2, y1, y2 = 0, 0, 0, 0
if x > 0:
x1 = 0
y1 = 3 * y
if y < 0:
y1 = -y1
x2 = int(1.5 * x)
y2 = 0
elif x < 0 and y > 0:
x1 = int(1.5 * x)
y1 = 0
x2 = 0
y2 = 3 * y
if y < 0:
y2 = -y2
print("{} {} {} {}".format(x1, y1, x2, y2))
| 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, y = map(int, input().split())
x1, x2, y1, y2 = 0, 0, 0, 0
if x > 0:
x1 = 0
y1 = 3 * y
if y < 0:
y1 = -y1
x2 = int(1.5 * x)
y2 = 0
elif x < 0 and y > 0:
x1 = int(1.5 * x)
y1 = 0
x2 = 0
y2 = 3 * y
if y < 0:
y2 = -y2
print("{} {} {} {}".format(x1, y1, x2, y2))
``` | 0 | |
435 | A | Queue on Bus Stop | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | It's that time of the year when the Russians flood their countryside summer cottages (dachas) and the bus stop has a lot of people. People rarely go to the dacha on their own, it's usually a group, so the people stand in queue by groups.
The bus stop queue has *n* groups of people. The *i*-th group from the beginning ... | The first line contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=100). The next line contains *n* integers: *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=*m*). | Print a single integer — the number of buses that is needed to transport all *n* groups to the dacha countryside. | [
"4 3\n2 3 2 1\n",
"3 4\n1 2 1\n"
] | [
"3\n",
"1\n"
] | none | 500 | [
{
"input": "4 3\n2 3 2 1",
"output": "3"
},
{
"input": "3 4\n1 2 1",
"output": "1"
},
{
"input": "1 5\n4",
"output": "1"
},
{
"input": "5 1\n1 1 1 1 1",
"output": "5"
},
{
"input": "6 4\n1 3 2 3 4 1",
"output": "5"
},
{
"input": "6 8\n6 1 1 1 4 5",
... | 1,666,236,168 | 2,147,483,647 | Python 3 | OK | TESTS | 34 | 46 | 0 | gb = [int(i) for i in input().split()]
groups = gb[0]
max_capacity = gb[1]
current = 0
trips_required = 1
group_nums = [int(i) for i in input().split()]
for k in group_nums:
if current + k > max_capacity:
current = k
trips_required += 1
else:
current += k
print(trips_required... | Title: Queue on Bus Stop
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
It's that time of the year when the Russians flood their countryside summer cottages (dachas) and the bus stop has a lot of people. People rarely go to the dacha on their own, it's usually a group, so the people stand... | ```python
gb = [int(i) for i in input().split()]
groups = gb[0]
max_capacity = gb[1]
current = 0
trips_required = 1
group_nums = [int(i) for i in input().split()]
for k in group_nums:
if current + k > max_capacity:
current = k
trips_required += 1
else:
current += k
print(trip... | 3 | |
245 | H | Queries for Number of Palindromes | PROGRAMMING | 1,800 | [
"dp",
"hashing",
"strings"
] | null | null | You've got a string *s*<==<=*s*1*s*2... *s*|*s*| of length |*s*|, consisting of lowercase English letters. There also are *q* queries, each query is described by two integers *l**i*,<=*r**i* (1<=≤<=*l**i*<=≤<=*r**i*<=≤<=|*s*|). The answer to the query is the number of substrings of string *s*[*l**i*... *r**i*], which a... | The first line contains string *s* (1<=≤<=|*s*|<=≤<=5000). The second line contains a single integer *q* (1<=≤<=*q*<=≤<=106) — the number of queries. Next *q* lines contain the queries. The *i*-th of these lines contains two space-separated integers *l**i*,<=*r**i* (1<=≤<=*l**i*<=≤<=*r**i*<=≤<=|*s*|) — the description ... | Print *q* integers — the answers to the queries. Print the answers in the order, in which the queries are given in the input. Separate the printed numbers by whitespaces. | [
"caaaba\n5\n1 1\n1 4\n2 3\n4 6\n4 5\n"
] | [
"1\n7\n3\n4\n2\n"
] | Consider the fourth query in the first test case. String *s*[4... 6] = «aba». Its palindrome substrings are: «a», «b», «a», «aba». | 0 | [
{
"input": "caaaba\n5\n1 1\n1 4\n2 3\n4 6\n4 5",
"output": "1\n7\n3\n4\n2"
},
{
"input": "a\n100\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 1\n1 ... | 1,567,972,511 | 2,147,483,647 | PyPy 3 | MEMORY_LIMIT_EXCEEDED | TESTS | 4 | 2,620 | 268,390,400 | a = input()
n = len(a)
pal = [[0 for __ in range(n+10)] for i in range(n+10)]
dp = [[0 for __ in range(n+10)] for i in range(n+10)]
for i in range(n):
pal[i][i] = 1
dp[i][i] = 1
pal[i+1][i] = 1
for l in range(2,n+1):
for s in range(n-l+1):
pal[s][s+l-1] = pal[s+1][s+l-2] and a[s]==a[s+l-1]
dp... | Title: Queries for Number of Palindromes
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You've got a string *s*<==<=*s*1*s*2... *s*|*s*| of length |*s*|, consisting of lowercase English letters. There also are *q* queries, each query is described by two integers *l**i*,<=*r**i* (1<=≤<=*l*... | ```python
a = input()
n = len(a)
pal = [[0 for __ in range(n+10)] for i in range(n+10)]
dp = [[0 for __ in range(n+10)] for i in range(n+10)]
for i in range(n):
pal[i][i] = 1
dp[i][i] = 1
pal[i+1][i] = 1
for l in range(2,n+1):
for s in range(n-l+1):
pal[s][s+l-1] = pal[s+1][s+l-2] and a[s]==a[s+... | 0 | |
104 | A | Blackjack | PROGRAMMING | 800 | [
"implementation"
] | A. Blackjack | 2 | 256 | One rainy gloomy evening when all modules hid in the nearby cafes to drink hot energetic cocktails, the Hexadecimal virus decided to fly over the Mainframe to look for a Great Idea. And she has found one!
Why not make her own Codeforces, with blackjack and other really cool stuff? Many people will surely be willing to... | The only line contains *n* (1<=≤<=*n*<=≤<=25) — the required sum of points. | Print the numbers of ways to get the second card in the required way if the first card is the queen of spades. | [
"12\n",
"20\n",
"10\n"
] | [
"4",
"15",
"0"
] | In the first sample only four two's of different suits can earn the required sum of points.
In the second sample we can use all tens, jacks, queens and kings; overall it's 15 cards, as the queen of spades (as any other card) is only present once in the pack of cards and it's already in use.
In the third sample there ... | 500 | [
{
"input": "12",
"output": "4"
},
{
"input": "20",
"output": "15"
},
{
"input": "10",
"output": "0"
},
{
"input": "11",
"output": "4"
},
{
"input": "15",
"output": "4"
},
{
"input": "18",
"output": "4"
},
{
"input": "25",
"output": "0"
... | 1,676,028,522 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 25 | 124 | 0 | n = int(input()) -10
if n <= 0 or n > 11:
print(0)
else:
if n <= 9 or n == 11:
print(4)
else:
print(15)
| Title: Blackjack
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
One rainy gloomy evening when all modules hid in the nearby cafes to drink hot energetic cocktails, the Hexadecimal virus decided to fly over the Mainframe to look for a Great Idea. And she has found one!
Why not make her own Co... | ```python
n = int(input()) -10
if n <= 0 or n > 11:
print(0)
else:
if n <= 9 or n == 11:
print(4)
else:
print(15)
``` | 3.969 |
59 | A | Word | PROGRAMMING | 800 | [
"implementation",
"strings"
] | A. Word | 2 | 256 | Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it either only consisted of lowercase letters or, vice versa, only of uppercase ones. At th... | The first line contains a word *s* — it consists of uppercase and lowercase Latin letters and possesses the length from 1 to 100. | Print the corrected word *s*. If the given word *s* has strictly more uppercase letters, make the word written in the uppercase register, otherwise - in the lowercase one. | [
"HoUse\n",
"ViP\n",
"maTRIx\n"
] | [
"house\n",
"VIP\n",
"matrix\n"
] | none | 500 | [
{
"input": "HoUse",
"output": "house"
},
{
"input": "ViP",
"output": "VIP"
},
{
"input": "maTRIx",
"output": "matrix"
},
{
"input": "BNHWpnpawg",
"output": "bnhwpnpawg"
},
{
"input": "VTYGP",
"output": "VTYGP"
},
{
"input": "CHNenu",
"output": "chn... | 1,524,084,168 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 156 | 7,065,600 | #Word.py
str1 = input()
lower = upper = 0
for x in str1:
if x.islower():
lower+=1
else:
upper+=1
if lower<upper:
str1 = str1.upper()
else:
str1 = str1.lower()
print(str1) | Title: Word
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it ei... | ```python
#Word.py
str1 = input()
lower = upper = 0
for x in str1:
if x.islower():
lower+=1
else:
upper+=1
if lower<upper:
str1 = str1.upper()
else:
str1 = str1.lower()
print(str1)
``` | 3.947839 |
227 | A | Where do I Turn? | PROGRAMMING | 1,300 | [
"geometry"
] | null | null | Trouble came from the overseas lands: a three-headed dragon Gorynych arrived. The dragon settled at point *C* and began to terrorize the residents of the surrounding villages.
A brave hero decided to put an end to the dragon. He moved from point *A* to fight with Gorynych. The hero rode from point *A* along a straight... | The first input line contains two space-separated integers *x**a*,<=*y**a* (|*x**a*|,<=|*y**a*|<=≤<=109) — the coordinates of point *A*. The second line contains the coordinates of point *B* in the same form, the third line contains the coordinates of point *C*.
It is guaranteed that all points are pairwise different.... | Print a single line. If a hero must turn left, print "LEFT" (without the quotes); If he must go straight ahead, print "TOWARDS" (without the quotes); if he should turn right, print "RIGHT" (without the quotes). | [
"0 0\n0 1\n1 1\n",
"-1 -1\n-3 -3\n-4 -4\n",
"-4 -6\n-3 -7\n-2 -6\n"
] | [
"RIGHT\n",
"TOWARDS\n",
"LEFT\n"
] | The picture to the first sample:
The red color shows points A, B and C. The blue arrow shows the hero's direction. The green color shows the hero's trajectory.
The picture to the second sample: | 500 | [
{
"input": "0 0\n0 1\n1 1",
"output": "RIGHT"
},
{
"input": "-1 -1\n-3 -3\n-4 -4",
"output": "TOWARDS"
},
{
"input": "-4 -6\n-3 -7\n-2 -6",
"output": "LEFT"
},
{
"input": "-44 57\n-118 -41\n-216 33",
"output": "RIGHT"
},
{
"input": "39 100\n90 85\n105 136",
"o... | 1,681,561,643 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 5 | 92 | 0 | a = [int(i) for i in input().split()]
b = [int(i) for i in input().split()]
c = [int(i) for i in input().split()]
if a[0] == b[0] == c[0] or a[1] == b[1] == c[1] or (a[0] - b[0] == a[1] - b[1] and b[0] - c[0] == b[1] - c[1]):
print('TOWARDS')
else:
ab = [b[0] - a[0], b[1] - a[1]]
bc = [c[0] - b[0], c... | Title: Where do I Turn?
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Trouble came from the overseas lands: a three-headed dragon Gorynych arrived. The dragon settled at point *C* and began to terrorize the residents of the surrounding villages.
A brave hero decided to put an end to the... | ```python
a = [int(i) for i in input().split()]
b = [int(i) for i in input().split()]
c = [int(i) for i in input().split()]
if a[0] == b[0] == c[0] or a[1] == b[1] == c[1] or (a[0] - b[0] == a[1] - b[1] and b[0] - c[0] == b[1] - c[1]):
print('TOWARDS')
else:
ab = [b[0] - a[0], b[1] - a[1]]
bc = [c[0]... | 0 | |
900 | B | Position in Fraction | PROGRAMMING | 1,300 | [
"math",
"number theory"
] | null | null | You have a fraction . You need to find the first occurrence of digit *c* into decimal notation of the fraction after decimal point. | The first contains three single positive integers *a*, *b*, *c* (1<=≤<=*a*<=<<=*b*<=≤<=105, 0<=≤<=*c*<=≤<=9). | Print position of the first occurrence of digit *c* into the fraction. Positions are numbered from 1 after decimal point. It there is no such position, print -1. | [
"1 2 0\n",
"2 3 7\n"
] | [
"2",
"-1"
] | The fraction in the first example has the following decimal notation: <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/896357459a466614a0542f34c9cfb0cef1afc9ed.png" style="max-width: 100.0%;max-height: 100.0%;"/>. The first zero stands on second position.
The fraction in the second example ... | 1,000 | [
{
"input": "1 2 0",
"output": "2"
},
{
"input": "2 3 7",
"output": "-1"
},
{
"input": "1 100000 1",
"output": "5"
},
{
"input": "1 7 7",
"output": "6"
},
{
"input": "99999 100000 8",
"output": "-1"
},
{
"input": "44102 73848 2",
"output": "132"
}... | 1,591,712,950 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 2 | 202 | 2,150,400 | a, b, c = input().split()
d = int(a) / int(b)
d = str(d).split(".")
d = d[1]
if c in d:
print(d.index(c) + 1)
elif c == "0":
print(len(d) + 1)
else:
print(-1)
| Title: Position in Fraction
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You have a fraction . You need to find the first occurrence of digit *c* into decimal notation of the fraction after decimal point.
Input Specification:
The first contains three single positive integers *a*, *b*, ... | ```python
a, b, c = input().split()
d = int(a) / int(b)
d = str(d).split(".")
d = d[1]
if c in d:
print(d.index(c) + 1)
elif c == "0":
print(len(d) + 1)
else:
print(-1)
``` | -1 | |
669 | A | Little Artem and Presents | PROGRAMMING | 800 | [
"math"
] | null | null | Little Artem got *n* stones on his birthday and now wants to give some of them to Masha. He knows that Masha cares more about the fact of receiving the present, rather than the value of that present, so he wants to give her stones as many times as possible. However, Masha remembers the last present she received, so Art... | The only line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=109) — number of stones Artem received on his birthday. | Print the maximum possible number of times Artem can give presents to Masha. | [
"1\n",
"2\n",
"3\n",
"4\n"
] | [
"1\n",
"1\n",
"2\n",
"3\n"
] | In the first sample, Artem can only give 1 stone to Masha.
In the second sample, Atrem can give Masha 1 or 2 stones, though he can't give her 1 stone two times.
In the third sample, Atrem can first give Masha 2 stones, a then 1 more stone.
In the fourth sample, Atrem can first give Masha 1 stone, then 2 stones, and ... | 500 | [
{
"input": "1",
"output": "1"
},
{
"input": "2",
"output": "1"
},
{
"input": "3",
"output": "2"
},
{
"input": "4",
"output": "3"
},
{
"input": "100",
"output": "67"
},
{
"input": "101",
"output": "67"
},
{
"input": "102",
"output": "68"... | 1,532,687,868 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 7 | 2,000 | 0 | n = int(input())
m = 0
k = 1
while n >= k:
n = n - k
m = m + 1
k = 3 - k
print(m) | Title: Little Artem and Presents
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little Artem got *n* stones on his birthday and now wants to give some of them to Masha. He knows that Masha cares more about the fact of receiving the present, rather than the value of that present, so he wan... | ```python
n = int(input())
m = 0
k = 1
while n >= k:
n = n - k
m = m + 1
k = 3 - k
print(m)
``` | 0 |
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