question large_stringlengths 265 13.2k |
|---|
Solve the programming task below in a Python markdown code block.
You are given an integer N. Find the number of strings of length N that satisfy the following conditions, modulo 10^9+7:
- The string does not contain characters other than A, C, G and T.
- The string does not contain AGC as a substring.
- The condit... |
Solve the programming task below in a Python markdown code block.
Harry is a bright student. To prepare thoroughly for exams, he completes all the exercises in his book! Now that the exams are approaching fast, he is doing book exercises day and night. He writes down and keeps updating the remaining number of exercise... |
Solve the programming task below in a Python markdown code block.
Arkady invited Anna for a dinner to a sushi restaurant. The restaurant is a bit unusual: it offers $n$ pieces of sushi aligned in a row, and a customer has to choose a continuous subsegment of these sushi to buy.
The pieces of sushi are of two types: e... |
Solve the programming task below in a Python markdown code block.
You are given three integers $a \le b \le c$.
In one move, you can add $+1$ or $-1$ to any of these integers (i.e. increase or decrease any number by one). You can perform such operation any (possibly, zero) number of times, you can even perform this o... |
Solve the programming task below in a Python markdown code block.
Find the minimum area of a square land on which you can place two identical rectangular $a \times b$ houses. The sides of the houses should be parallel to the sides of the desired square land.
Formally, You are given two identical rectangles with sid... |
Solve the programming task below in a Python markdown code block.
Define a "prime prime" number to be a rational number written as one prime number over another prime number: `primeA / primeB` (e.g. `7/31`)
Given a whole number `N`, generate the number of "prime prime" rational numbers less than 1, using only prime n... |
Solve the programming task below in a Python markdown code block.
There are N integers written on a blackboard. The i-th integer is A_i.
Takahashi will repeatedly perform the following operation on these numbers:
* Select a pair of integers, A_i and A_j, that have the same parity (that is, both are even or both are ... |
Solve the programming task below in a Python markdown code block.
problem
At IOI Confectionery, rice crackers are baked using the traditional method since the company was founded. This traditional method is to bake the front side for a certain period of time with charcoal, turn it over when the front side is baked, a... |
Solve the programming task below in a Python markdown code block.
Alice is visiting New York City. To make the trip fun, Alice will take photos of the city skyline and give the set of photos as a present to Bob. However, she wants to find the set of photos with maximum beauty and she needs your help.
There are $n$ bu... |
Solve the programming task below in a Python markdown code block.
# Summary:
Given a number, `num`, return the shortest amount of `steps` it would take from 1, to land exactly on that number.
# Description:
A `step` is defined as either:
- Adding 1 to the number: `num += 1`
- Doubling the number: `num *= 2`
You will... |
Solve the programming task below in a Python markdown code block.
Given is an integer S.
Find how many sequences there are whose terms are all integers greater than or equal to 3, and whose sum is equal to S.
The answer can be very large, so output it modulo 10^9 + 7.
-----Constraints-----
- 1 \leq S \leq 2000
- Al... |
Solve the programming task below in a Python markdown code block.
A variation of determining leap years, assuming only integers are used and years can be negative and positive.
Write a function which will return the days in the year and the year entered in a string. For example 2000, entered as an integer, will retu... |
Solve the programming task below in a Python markdown code block.
There is a building with 2N floors, numbered 1, 2, \ldots, 2N from bottom to top.
The elevator in this building moved from Floor 1 to Floor 2N just once.
On the way, N persons got on and off the elevator. Each person i (1 \leq i \leq N) got on at Floor ... |
Solve the programming task below in a Python markdown code block.
Mr. Square is going on a holiday. He wants to bring 2 of his favorite squares with him, so he put them in his rectangle suitcase.
Write a function that, given the size of the squares and the suitcase, return whether the squares can fit inside the suitc... |
Solve the programming task below in a Python markdown code block.
There are N cities on a 2D plane. The coordinate of the i-th city is (x_i, y_i). Here (x_1, x_2, \dots, x_N) and (y_1, y_2, \dots, y_N) are both permuations of (1, 2, \dots, N).
For each k = 1,2,\dots,N, find the answer to the following question:
Rng ... |
Solve the programming task below in a Python markdown code block.
Contest T-shirts
Segtree has $ M $ contest T-shirts.
He decided to spend $ N $ days on the contest T-shirt alone, and told $ i = 1, 2, 3, \ dots, N $ "$ A_i $ T-shirt on the $ i $ day." I made a plan for $ N $ to wear.
However, if you keep the curren... |
Solve the programming task below in a Python markdown code block.
Vasya has recently got a job as a cashier at a local store. His day at work is $L$ minutes long. Vasya has already memorized $n$ regular customers, the $i$-th of which comes after $t_{i}$ minutes after the beginning of the day, and his service consumes ... |
Solve the programming task below in a Python markdown code block.
There is a directed graph with N vertices and M edges.
The i-th edge (1≤i≤M) points from vertex a_i to vertex b_i, and has a weight c_i.
We will play the following single-player game using this graph and a piece.
Initially, the piece is placed at vertex... |
Solve the programming task below in a Python markdown code block.
Bridge Removal
ICPC islands once had been a popular tourist destination. For nature preservation, however, the government decided to prohibit entrance to the islands, and to remove all the man-made structures there. The hardest part of the project is t... |
Solve the programming task below in a Python markdown code block.
Polycarpus has a sequence, consisting of n non-negative integers: a1, a2, ..., an.
Let's define function f(l, r) (l, r are integer, 1 ≤ l ≤ r ≤ n) for sequence a as an operation of bitwise OR of all the sequence elements with indexes from l to r. Forma... |
Solve the programming task below in a Python markdown code block.
Read problems statements in Mandarin Chinese, Russian and Vietnamese as well.
Chef likes problems involving arrays. Unfortunately, the last one he tried to solve didn't quite get solved.
Chef has an array A of N positive numbers. He wants to find the... |
Solve the programming task below in a Python markdown code block.
We have a sequence p = {p_1,\ p_2,\ ...,\ p_N} which is a permutation of {1,\ 2,\ ...,\ N}.
You can perform the following operation at most once: choose integers i and j (1 \leq i < j \leq N), and swap p_i and p_j. Note that you can also choose not to p... |
Solve the programming task below in a Python markdown code block.
You get a "text" and have to shift the vowels by "n" positions to the right.
(Negative value for n should shift to the left.)
"Position" means the vowel's position if taken as one item in a list of all vowels within the string.
A shift by 1 would mean, ... |
Solve the programming task below in a Python markdown code block.
Mahmoud and Ehab play a game called the even-odd game. Ehab chooses his favorite integer n and then they take turns, starting from Mahmoud. In each player's turn, he has to choose an integer a and subtract it from n such that: 1 ≤ a ≤ n. If it's Mahmo... |
Solve the programming task below in a Python markdown code block.
Ari the monster is not an ordinary monster. She is the hidden identity of Super M, the Byteforces’ superhero. Byteforces is a country that consists of n cities, connected by n - 1 bidirectional roads. Every road connects exactly two distinct cities, and... |
Solve the programming task below in a Python markdown code block.
Takahashi recorded his daily life for the last few days as a integer sequence of length 2N, as follows:
* a_1, b_1, a_2, b_2, ... , a_N, b_N
This means that, starting from a certain time T, he was:
* sleeping for exactly a_1 seconds
* then awake fo... |
Solve the programming task below in a Python markdown code block.
You are given a string s of length n consisting of lowercase English letters.
For two given strings s and t, say S is the set of distinct characters of s and T is the set of distinct characters of t. The strings s and t are isomorphic if their lengths ... |
Solve the programming task below in a Python markdown code block.
You are given an array $a$ of length $n$ that has a special condition: every element in this array has at most 7 divisors. Find the length of the shortest non-empty subsequence of this array product of whose elements is a perfect square.
A sequence $a$... |
Solve the programming task below in a Python markdown code block.
Taro and Jiro will play the following game against each other.
Initially, they are given a sequence a = (a_1, a_2, \ldots, a_N). Until a becomes empty, the two players perform the following operation alternately, starting from Taro:
* Remove the eleme... |
Solve the programming task below in a Python markdown code block.
Four-digit palindromes start with `[1001,1111,1221,1331,1441,1551,1551,...]` and the number at position `2` is `1111`.
You will be given two numbers `a` and `b`. Your task is to return the `a-digit` palindrome at position `b` if the palindromes were ... |
Solve the programming task below in a Python markdown code block.
Given are three positive integers A, B, and C. Compute the following value modulo 998244353:
\sum_{a=1}^{A} \sum_{b=1}^{B} \sum_{c=1}^{C} abc
-----Constraints-----
- 1 \leq A, B, C \leq 10^9
-----Input-----
Input is given from standard input in the f... |
Solve the programming task below in a Python markdown code block.
The only difference between easy and hard versions is the constraints.
Vova likes pictures with kittens. The news feed in the social network he uses can be represented as an array of $n$ consecutive pictures (with kittens, of course). Vova likes all th... |
Solve the programming task below in a Python markdown code block.
Problem statement
AOR Ika got a cabbage with $ N $ leaves. The leaves of this cabbage are numbered $ 1, \ ldots, N $ in order from the outside, and the dirtiness of the $ i $ th leaf is $ D_i $. The larger this value is, the worse the degree of dirt is... |
Solve the programming task below in a Python markdown code block.
Most languages have a `split` function that lets you turn a string like `“hello world”` into an array like`[“hello”, “world”]`. But what if we don't want to lose the separator? Something like `[“hello”, “ world”]`.
#### Task:
Your job is to implement ... |
Solve the programming task below in a Python markdown code block.
The HR manager was disappointed again. The last applicant failed the interview the same way as 24 previous ones. "Do I give such a hard task?" — the HR manager thought. "Just raise number 5 to the power of n and get last two digits of the number. Yes, o... |
Solve the programming task below in a Python markdown code block.
Recently a serious bug has been found in the FOS code. The head of the F company wants to find the culprit and punish him. For that, he set up an organizational meeting, the issue is: who's bugged the code? Each of the n coders on the meeting said: 'I k... |
Solve the programming task below in a Python markdown code block.
A `Nice array` is defined to be an array where for every value `n` in the array, there is also an element `n-1` or `n+1` in the array.
example:
```
[2,10,9,3] is Nice array because
2=3-1
10=9+1
3=2+1
9=10-1
```
Write a function named `isNice`/`IsNice... |
Solve the programming task below in a Python markdown code block.
The only difference between the easy and the hard versions is constraints.
A subsequence is a string that can be derived from another string by deleting some or no symbols without changing the order of the remaining symbols. Characters to be deleted ar... |
Solve the programming task below in a Python markdown code block.
C: Only one subsequence --Unique Subsequence-
problem
One day Ebi-chan noticed that a text string T of length n and a pattern string P (m \ leq n) of length m were placed on the desk. Ebi-chan loves the "only one subsequence" that appears in strings, ... |
Solve the programming task below in a Python markdown code block.
Suppose you are given a string $s$ of length $n$ consisting of lowercase English letters. You need to compress it using the smallest possible number of coins.
To compress the string, you have to represent $s$ as a concatenation of several non-empty str... |
Solve the programming task below in a Python markdown code block.
Petya is preparing for IQ test and he has noticed that there many problems like: you are given a sequence, find the next number. Now Petya can solve only problems with arithmetic or geometric progressions.
Arithmetic progression is a sequence a_1, a_1 ... |
Solve the programming task below in a Python markdown code block.
Happy traveller [Part 1]
There is a play grid NxN; Always square!
0 1 2 3
0 [o, o, o, X]
1 [o, o, o, o]
2 [o, o, o, o]
3 [o, o, o, o]
You start from a random point. I mean, you are given the coordinates of your start position in format (row, ... |
Solve the programming task below in a Python markdown code block.
You are given an array a consisting of n integers.
Let min(l, r) be the minimum value among a_l, a_{l + 1}, …, a_r and max(l, r) be the maximum value among a_l, a_{l + 1}, …, a_r.
Your task is to choose three positive (greater than 0) integers x, y an... |
Solve the programming task below in a Python markdown code block.
Bear Limak prepares problems for a programming competition. Of course, it would be unprofessional to mention the sponsor name in the statement. Limak takes it seriously and he is going to change some words. To make it still possible to read, he will try... |
Solve the programming task below in a Python markdown code block.
It can be shown that any positive integer x can be uniquely represented as x = 1 + 2 + 4 + ... + 2k - 1 + r, where k and r are integers, k ≥ 0, 0 < r ≤ 2k. Let's call that representation prairie partition of x.
For example, the prairie partitions of 12... |
Solve the programming task below in a Python markdown code block.
The central dogma of molecular biology is that DNA is transcribed into RNA, which is then tranlsated into protein. RNA, like DNA, is a long strand of nucleic acids held together by a sugar backbone (ribose in this case). Each segment of three bases is c... |
Solve the programming task below in a Python markdown code block.
For any positive integer, we define a digit rotation as either moving the first digit
to the end of the number (left digit rotation), or the last digit to the front of the number (right digit rotation).
For example, the number 12345 could be left digit ... |
Solve the programming task below in a Python markdown code block.
We have a grid of squares with N rows and M columns. Let (i, j) denote the square at the i-th row from the top and j-th column from the left. We will choose K of the squares and put a piece on each of them.
If we place the K pieces on squares (x_1, y_1)... |
Solve the programming task below in a Python markdown code block.
Given two integers `a` and `b`, which can be positive or negative, find the sum of all the numbers between including them too and return it. If the two numbers are equal return `a` or `b`.
**Note:** `a` and `b` are not ordered!
## Examples
```python
... |
Solve the programming task below in a Python markdown code block.
Being a programmer, you like arrays a lot. For your birthday, your friends have given you an array a consisting of n distinct integers.
Unfortunately, the size of a is too small. You want a bigger array! Your friends agree to give you a bigger array, b... |
Solve the programming task below in a Python markdown code block.
Given a number, write a function to output its reverse digits. (e.g. given 123 the answer is 321)
Numbers should preserve their sign; i.e. a negative number should still be negative when reversed.
### Examples
```
123 -> 321
-456 -> -654
1000 -> ... |
Solve the programming task below in a Python markdown code block.
"Point reflection" or "point symmetry" is a basic concept in geometry where a given point, P, at a given position relative to a mid-point, Q has a corresponding point, P1, which is the same distance from Q but in the opposite direction.
## Task
Given ... |
Solve the programming task below in a Python markdown code block.
Parmida is a clever girl and she wants to participate in Olympiads this year. Of course she wants her partner to be clever too (although he's not)! Parmida has prepared the following test problem for Pashmak.
There is a sequence a that consists of n in... |
Solve the programming task below in a Python markdown code block.
You are given a tree (a connected acyclic undirected graph) of n vertices. Vertices are numbered from 1 to n and each vertex is assigned a character from a to t.
A path in the tree is said to be palindromic if at least one permutation of the labels in ... |
Solve the programming task below in a Python markdown code block.
Vasya is studying number theory. He has denoted a function f(a, b) such that: f(a, 0) = 0; f(a, b) = 1 + f(a, b - gcd(a, b)), where gcd(a, b) is the greatest common divisor of a and b.
Vasya has two numbers x and y, and he wants to calculate f(x, y)... |
Solve the programming task below in a Python markdown code block.
A competitive eater, Alice is scheduling some practices for an eating contest on a magical calendar. The calendar is unusual because a week contains not necessarily $7$ days!
In detail, she can choose any integer $k$ which satisfies $1 \leq k \leq r$, ... |
Solve the programming task below in a Python markdown code block.
A string is called bracket sequence if it does not contain any characters other than "(" and ")". A bracket sequence is called regular if it it is possible to obtain correct arithmetic expression by inserting characters "+" and "1" into this sequence. F... |
Solve the programming task below in a Python markdown code block.
Given an array of 4 integers
```[a,b,c,d]``` representing two points ```(a, b)``` and ```(c, d)```, return a string representation of the slope of the line joining these two points.
For an undefined slope (division by 0), return ```undefined``` . ... |
Solve the programming task below in a Python markdown code block.
Masha has three sticks of length $a$, $b$ and $c$ centimeters respectively. In one minute Masha can pick one arbitrary stick and increase its length by one centimeter. She is not allowed to break sticks.
What is the minimum number of minutes she needs ... |
Solve the programming task below in a Python markdown code block.
HQ9+ is a joke programming language which has only four one-character instructions:
* "H" prints "Hello, World!",
* "Q" prints the source code of the program itself,
* "9" prints the lyrics of "99 Bottles of Beer" song,
* "+" increments the va... |
Solve the programming task below in a Python markdown code block.
You are given n distinct points on a plane with integral coordinates. For each point you can either draw a vertical line through it, draw a horizontal line through it, or do nothing.
You consider several coinciding straight lines as a single one. How m... |
Solve the programming task below in a Python markdown code block.
Polycarp has $n$ coins, the value of the $i$-th coin is $a_i$. It is guaranteed that all the values are integer powers of $2$ (i.e. $a_i = 2^d$ for some non-negative integer number $d$).
Polycarp wants to know answers on $q$ queries. The $j$-th query i... |
Solve the programming task below in a Python markdown code block.
There are n cells, numbered 1,2,..., n from left to right. You have to place a robot at any cell initially. The robot must make exactly k moves.
In one move, the robot must move one cell to the left or right, provided that it doesn't move out of bounds... |
Solve the programming task below in a Python markdown code block.
You are given an array a consisting of n positive integers, numbered from 1 to n. You can perform the following operation no more than 3n times:
1. choose three integers i, j and x (1 ≤ i, j ≤ n; 0 ≤ x ≤ 10^9);
2. assign a_i := a_i - x ⋅ i, a_j :=... |
Solve the programming task below in a Python markdown code block.
Training is indispensable for achieving good results at ICPC. Rabbit wants to win at ICPC, so he decided to practice today as well.
Today's training is to increase creativity by drawing pictures. Let's draw a pattern well using a square stamp.
I want ... |
Solve the programming task below in a Python markdown code block.
Complete the solution so that it returns the number of times the search_text is found within the full_text.
```python
search_substr( fullText, searchText, allowOverlap = true )
```
so that overlapping solutions are (not) counted. If the searchText is ... |
Solve the programming task below in a Python markdown code block.
In the official contest this problem has a different statement, for which jury's solution was working incorrectly, and for this reason it was excluded from the contest. This mistake have been fixed and the current given problem statement and model solut... |
Solve the programming task below in a Python markdown code block.
There exists an island called Arpa’s land, some beautiful girls live there, as ugly ones do.
Mehrdad wants to become minister of Arpa’s land. Arpa has prepared an exam. Exam has only one question, given n, print the last digit of 1378^{n}.
[Image]
... |
Solve the programming task below in a Python markdown code block.
Vladik and Chloe decided to determine who of them is better at math. Vladik claimed that for any positive integer n he can represent fraction <image> as a sum of three distinct positive fractions in form <image>.
Help Vladik with that, i.e for a given ... |
Solve the programming task below in a Python markdown code block.
In a factory, there are N robots placed on a number line. Robot i is placed at coordinate X_i and can extend its arms of length L_i in both directions, positive and negative.
We want to remove zero or more robots so that the movable ranges of arms of n... |
Solve the programming task below in a Python markdown code block.
Now that Kuroni has reached 10 years old, he is a big boy and doesn't like arrays of integers as presents anymore. This year he wants a Bracket sequence as a Birthday present. More specifically, he wants a bracket sequence so complex that no matter how ... |
Solve the programming task below in a Python markdown code block.
Construct a dice from a given sequence of integers in the same way as Dice I.
You are given integers on the top face and the front face after the dice was rolled in the same way as Dice I. Write a program to print an integer on the right side face.
<... |
Solve the programming task below in a Python markdown code block.
The on-board computer on Polycarp's car measured that the car speed at the beginning of some section of the path equals v_1 meters per second, and in the end it is v_2 meters per second. We know that this section of the route took exactly t seconds to p... |
Solve the programming task below in a Python markdown code block.
zscoder wants to generate an input file for some programming competition problem.
His input is a string consisting of n letters 'a'. He is too lazy to write a generator so he will manually generate the input in a text editor.
Initially, the text edito... |
Solve the programming task below in a Python markdown code block.
You are given a sequence of positive integers of length N, A=a_1,a_2,…,a_{N}, and an integer K.
How many contiguous subsequences of A satisfy the following condition?
- (Condition) The sum of the elements in the contiguous subsequence is at least K.
We... |
Solve the programming task below in a Python markdown code block.
You are given a string $t$ and a set $S$ of $N$ different strings. You need to separate $t$ such that each part is included in $S$.
For example, the following 4 separation methods satisfy the condition when $t = abab$ and $S = \\{a, ab, b\\}$.
* $a,b,... |
Solve the programming task below in a Python markdown code block.
The Duck song
For simplicity, we'll assume that there are only three types of grapes: green grapes, purple grapes and black grapes.
Andrew, Dmitry and Michal are all grapes' lovers, however their preferences of grapes are different. To make all of the... |
Solve the programming task below in a Python markdown code block.
You are playing a game of Jongmah. You don't need to know the rules to solve this problem. You have n tiles in your hand. Each tile has an integer between 1 and m written on it.
To win the game, you will need to form some number of triples. Each triple... |
Solve the programming task below in a Python markdown code block.
Gerald has been selling state secrets at leisure. All the secrets cost the same: n marks. The state which secrets Gerald is selling, has no paper money, only coins. But there are coins of all positive integer denominations that are powers of three: 1 ma... |
Solve the programming task below in a Python markdown code block.
Recently Johnny have learned bogosort sorting algorithm. He thought that it is too ineffective. So he decided to improve it. As you may know this algorithm shuffles the sequence randomly until it is sorted. Johnny decided that we don't need to shuffle t... |
Solve the programming task below in a Python markdown code block.
# Task
You are given three integers `l, d and x`. Your task is:
```
• determine the minimal integer n
such that l ≤ n ≤ d, and the sum of its digits equals x.
• determine the maximal integer m
such that l ≤ m ≤ d, and the sum of its digits eq... |
Solve the programming task below in a Python markdown code block.
Switch/Case - Bug Fixing #6
Oh no! Timmy's evalObject function doesn't work. He uses Switch/Cases to evaluate the given properties of an object, can you fix timmy's function?
Read the inputs from stdin solve the problem and write the answer to stdout ... |
Solve the programming task below in a Python markdown code block.
Innokenty works at a flea market and sells some random stuff rare items. Recently he found an old rectangular blanket. It turned out that the blanket is split in $n \cdot m$ colored pieces that form a rectangle with $n$ rows and $m$ columns.
The color... |
Solve the programming task below in a Python markdown code block.
You are given $4n$ sticks, the length of the $i$-th stick is $a_i$.
You have to create $n$ rectangles, each rectangle will consist of exactly $4$ sticks from the given set. The rectangle consists of four sides, opposite sides should have equal length a... |
Solve the programming task below in a Python markdown code block.
Taro is planning a long trip by train during the summer vacation. However, in order for Taro, who is a high school student, to travel as far as possible during the summer vacation, which has only one month, he cannot make a good plan unless he finds the... |
Solve the programming task below in a Python markdown code block.
A carpet shop sells carpets in different varieties. Each carpet can come in a different roll width and can have a different price per square meter.
Write a function `cost_of_carpet` which calculates the cost (rounded to 2 decimal places) of carpeting ... |
Solve the programming task below in a Python markdown code block.
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. Aft... |
Solve the programming task below in a Python markdown code block.
In poker, you have 5 cards. There are 10 kinds of poker hands (from highest to lowest):
- royal flush - ace, king, queen, jack and ten, all in the same suit
- straight flush - five cards of the same suit in sequence, such
as 10,9,8,7,6 of clubs; ace... |
Solve the programming task below in a Python markdown code block.
Description
KMC sells CDs every year at a coterie spot sale called Comic Market. F was supposed to sell CDs at the comic market, but due to the popularity of F, the KMC sales floor was flooded with people, and the calculation of change could not keep u... |
Solve the programming task below in a Python markdown code block.
You've got a string s = s1s2... s|s| of length |s|, consisting of lowercase English letters. There also are q queries, each query is described by two integers li, ri (1 ≤ li ≤ ri ≤ |s|). The answer to the query is the number of substrings of string s[li... |
Solve the programming task below in a Python markdown code block.
In this Kata, you will be given a mathematical string and your task will be to remove all braces as follows:
```Haskell
solve("x-(y+z)") = "x-y-z"
solve("x-(y-z)") = "x-y+z"
solve("u-(v-w-(x+y))-z") = "u-v+w+x+y-z"
solve("x-(-y-z)") = "x+y+z"
```
Ther... |
Solve the programming task below in a Python markdown code block.
Polycarp has a cat and his cat is a real gourmet! Dependent on a day of the week he eats certain type of food: on Mondays, Thursdays and Sundays he eats fish food; on Tuesdays and Saturdays he eats rabbit stew; on other days of week he eats chicken s... |
Solve the programming task below in a Python markdown code block.
Petya loves hockey very much. One day, as he was watching a hockey match, he fell asleep. Petya dreamt of being appointed to change a hockey team's name. Thus, Petya was given the original team name w and the collection of forbidden substrings s1, s2, .... |
Solve the programming task below in a Python markdown code block.
ZS the Coder has recently found an interesting concept called the Birthday Paradox. It states that given a random set of 23 people, there is around 50% chance that some two of them share the same birthday. ZS the Coder finds this very interesting, and d... |
Solve the programming task below in a Python markdown code block.
DZY has a sequence a, consisting of n integers.
We'll call a sequence a_{i}, a_{i} + 1, ..., a_{j} (1 ≤ i ≤ j ≤ n) a subsegment of the sequence a. The value (j - i + 1) denotes the length of the subsegment.
Your task is to find the longest subsegment ... |
Solve the programming task below in a Python markdown code block.
Let's denote as L(x, p) an infinite sequence of integers y such that gcd(p, y) = 1 and y > x (where gcd is the greatest common divisor of two integer numbers), sorted in ascending order. The elements of L(x, p) are 1-indexed; for example, 9, 13 and 15 a... |
Solve the programming task below in a Python markdown code block.
Leonid wants to become a glass carver (the person who creates beautiful artworks by cutting the glass). He already has a rectangular w mm × h mm sheet of glass, a diamond glass cutter and lots of enthusiasm. What he lacks is understanding of what to c... |
Solve the programming task below in a Python markdown code block.
Giga Tower is the tallest and deepest building in Cyberland. There are 17 777 777 777 floors, numbered from - 8 888 888 888 to 8 888 888 888. In particular, there is floor 0 between floor - 1 and floor 1. Every day, thousands of tourists come to this ... |
Solve the programming task below in a Python markdown code block.
You received a notebook which is called Death Note. This notebook has infinite number of pages. A rule is written on the last page (huh) of this notebook. It says: "You have to write names in this notebook during $n$ consecutive days. During the $i$-th ... |
Solve the programming task below in a Python markdown code block.
Edward Leven loves multiples of eleven very much. When he sees a number, he always tries to find consecutive subsequences (or substrings) forming multiples of eleven. He calls such subsequences as 11-sequences. For example, he can find an 11-sequence 78... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.