question large_stringlengths 265 13.2k |
|---|
Solve the programming task below in a Python markdown code block.
One day Vasya was sitting on a not so interesting Maths lesson and making an origami from a rectangular a mm × b mm sheet of paper (a > b). Usually the first step in making an origami is making a square piece of paper from the rectangular sheet by fol... |
Solve the programming task below in a Python markdown code block.
Little Petya likes arrays that consist of non-negative integers a lot. Recently his mom has presented him one such array consisting of n elements. Petya immediately decided to find there a segment of consecutive elements, such that the xor of all number... |
Solve the programming task below in a Python markdown code block.
Consider the array `[3,6,9,12]`. If we generate all the combinations with repetition that sum to `12`, we get `5` combinations: `[12], [6,6], [3,9], [3,3,6], [3,3,3,3]`. The length of the sub-arrays (such as `[3,3,3,3]` should be less than or equal to t... |
Solve the programming task below in a Python markdown code block.
A wise man told Kerem "Different is good" once, so Kerem wants all things in his life to be different.
Kerem recently got a string s consisting of lowercase English letters. Since Kerem likes it when things are different, he wants all substrings of hi... |
Solve the programming task below in a Python markdown code block.
Alice is the leader of the State Refactoring Party, and she is about to become the prime minister.
The elections have just taken place. There are $n$ parties, numbered from $1$ to $n$. The $i$-th party has received $a_i$ seats in the parliament.
Alic... |
Solve the programming task below in a Python markdown code block.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:$f(p) = \sum_{i = 1}^{n} \sum_{j = i}^{n} \operatorname{min}(p_{i}, p_{i + 1}, \ldots p_{j})$
Find the lexicographically m-th permutation of length n in the s... |
Solve the programming task below in a Python markdown code block.
**Introduction**
Little Petya very much likes sequences. However, recently he received a sequence as a gift from his mother.
Petya didn't like it at all! He decided to make a single replacement. After this replacement, Petya would like to the sequence... |
Solve the programming task below in a Python markdown code block.
Playing with Stones
Koshiro and Ukiko are playing a game with black and white stones. The rules of the game are as follows:
1. Before starting the game, they define some small areas and place "one or more black stones and one or more white stones" in ... |
Solve the programming task below in a Python markdown code block.
A text editor is a useful software tool that can help people in various situations including writing and programming. Your job in this problem is to construct an offline text editor, i.e., to write a program that first reads a given text and a sequence ... |
Solve the programming task below in a Python markdown code block.
Erelong Leha was bored by calculating of the greatest common divisor of two factorials. Therefore he decided to solve some crosswords. It's well known that it is a very interesting occupation though it can be very difficult from time to time. In the cou... |
Solve the programming task below in a Python markdown code block.
Polycarp likes squares and cubes of positive integers. Here is the beginning of the sequence of numbers he likes: $1$, $4$, $8$, $9$, ....
For a given number $n$, count the number of integers from $1$ to $n$ that Polycarp likes. In other words, find th... |
Solve the programming task below in a Python markdown code block.
You are given two arrays `arr1` and `arr2`, where `arr2` always contains integers.
Write the function `find_array(arr1, arr2)` such that:
For `arr1 = ['a', 'a', 'a', 'a', 'a']`, `arr2 = [2, 4]`
`find_array returns ['a', 'a']`
For `arr1 = [0, 1, 5, 2,... |
Solve the programming task below in a Python markdown code block.
Mr. Chanek has an integer represented by a string $s$. Zero or more digits have been erased and are denoted by the character _. There are also zero or more digits marked by the character X, meaning they're the same digit.
Mr. Chanek wants to count the ... |
Solve the programming task below in a Python markdown code block.
Read problems statements in Mandarin Chinese, Russian and Vietnamese as well.
Princess Rupsa saw one of her friends playing a special game. The game goes as follows:
N+1 numbers occur sequentially (one at a time) from A_{0} to A_{N}.
You must write t... |
Solve the programming task below in a Python markdown code block.
Aizu Gakuen High School holds a school festival every year. The most popular of these is the haunted house. The most popular reason is that 9 classes do haunted houses instead of 1 or 2 classes. Each one has its own unique haunted house. Therefore, many... |
Solve the programming task below in a Python markdown code block.
Problem statement
When you heard that this year's KUPC can be joined as a team, you decided to talk to your friends and join as a team.
Eventually, $ 4 $ people, including you, got together.
Individual strength is expressed in ratings, and $ 4 $ pers... |
Solve the programming task below in a Python markdown code block.
Petya is preparing for his birthday. He decided that there would be $n$ different dishes on the dinner table, numbered from $1$ to $n$. Since Petya doesn't like to cook, he wants to order these dishes in restaurants.
Unfortunately, all dishes are prepa... |
Solve the programming task below in a Python markdown code block.
Analyzing the mistakes people make while typing search queries is a complex and an interesting work. As there is no guaranteed way to determine what the user originally meant by typing some query, we have to use different sorts of heuristics.
Polycarp ... |
Solve the programming task below in a Python markdown code block.
For years, the Day of city N was held in the most rainy day of summer. New mayor decided to break this tradition and select a not-so-rainy day for the celebration. The mayor knows the weather forecast for the $n$ days of summer. On the $i$-th day, $a_i$... |
Solve the programming task below in a Python markdown code block.
Write a function ```x(n)``` that takes in a number ```n``` and returns an ```nxn``` array with an ```X``` in the middle. The ```X``` will be represented by ```1's``` and the rest will be ```0's```.
E.g.
```python
x(5) == [[1, 0, 0, 0, 1],
[0... |
Solve the programming task below in a Python markdown code block.
You are given n switches and m lamps. The i-th switch turns on some subset of the lamps. This information is given as the matrix a consisting of n rows and m columns where a_{i}, j = 1 if the i-th switch turns on the j-th lamp and a_{i}, j = 0 if the i-... |
Solve the programming task below in a Python markdown code block.
You are given n points on a plane. All the points are distinct and no three of them lie on the same line. Find the number of parallelograms with the vertices at the given points.
-----Input-----
The first line of the input contains integer n (1 ≤ n ≤... |
Solve the programming task below in a Python markdown code block.
A well-known art union called "Kalevich is Alive!" manufactures objects d'art (pictures). The union consists of n painters who decided to organize their work as follows.
Each painter uses only the color that was assigned to him. The colors are distinct... |
Solve the programming task below in a Python markdown code block.
You are given a simple weighted connected undirected graph, consisting of $n$ vertices and $m$ edges.
A path in the graph of length $k$ is a sequence of $k+1$ vertices $v_1, v_2, \dots, v_{k+1}$ such that for each $i$ $(1 \le i \le k)$ the edge $(v_i, ... |
Solve the programming task below in a Python markdown code block.
The following problem is well-known: given integers n and m, calculate $2^{n} \operatorname{mod} m$,
where 2^{n} = 2·2·...·2 (n factors), and $x \operatorname{mod} y$ denotes the remainder of division of x by y.
You are asked to solve the "reverse" p... |
Solve the programming task below in a Python markdown code block.
The R2 company has n employees working for it. The work involves constant exchange of ideas, sharing the stories of success and upcoming challenging. For that, R2 uses a famous instant messaging program Spyke.
R2 has m Spyke chats just to discuss all s... |
Solve the programming task below in a Python markdown code block.
The Little Elephant loves to play with color cards.
He has n cards, each has exactly two colors (the color of the front side and the color of the back side). Initially, all the cards lay on the table with the front side up. In one move the Little Eleph... |
Solve the programming task below in a Python markdown code block.
There is a vampire family of N members. Vampires are also known as extreme gourmets. Of course vampires' foods are human blood. However, not all kinds of blood is acceptable for them. Vampires drink blood that K blood types of ones are mixed, and each v... |
Solve the programming task below in a Python markdown code block.
You are given n numbers a1, a2, ..., an. You can perform at most k operations. For each operation you can multiply one of the numbers by x. We want to make <image> as large as possible, where <image> denotes the bitwise OR.
Find the maximum possible v... |
Solve the programming task below in a Python markdown code block.
Long time ago there was a symmetric array $a_1,a_2,\ldots,a_{2n}$ consisting of $2n$ distinct integers. Array $a_1,a_2,\ldots,a_{2n}$ is called symmetric if for each integer $1 \le i \le 2n$, there exists an integer $1 \le j \le 2n$ such that $a_i = -a_... |
Solve the programming task below in a Python markdown code block.
You are given an array consisting of $n$ integers $a_1, a_2, \dots , a_n$ and an integer $x$. It is guaranteed that for every $i$, $1 \le a_i \le x$.
Let's denote a function $f(l, r)$ which erases all values such that $l \le a_i \le r$ from the array $... |
Solve the programming task below in a Python markdown code block.
The princess is going to escape the dragon's cave, and she needs to plan it carefully.
The princess runs at vp miles per hour, and the dragon flies at vd miles per hour. The dragon will discover the escape after t hours and will chase the princess imme... |
Solve the programming task below in a Python markdown code block.
Write a function that takes one or more arrays and returns a new array of unique values in the order of the original provided arrays.
In other words, all values present from all arrays should be included in their original order, but with no duplicates ... |
Solve the programming task below in a Python markdown code block.
Devu is a class teacher of a class of n students. One day, in the morning prayer of the school, all the students of his class were standing in a line. You are given information of their arrangement by a string s. The string s consists of only letters 'B... |
Solve the programming task below in a Python markdown code block.
Problem:
You are given n natural numbers a1,a2,a3…… an. Let SOD of a number be defined as the Sum of Digits of that number. Compute the value of
{ [ SOD(a1) + SOD(a2) + …….. SOD(an) ] % 9 } – { [ SOD( a1 + a2 + ….. an ) ] % 9 }
Input:
The first line... |
Solve the programming task below in a Python markdown code block.
Quite recently a creative student Lesha had a lecture on trees. After the lecture Lesha was inspired and came up with the tree of his own which he called a k-tree.
A k-tree is an infinite rooted tree where:
each vertex has exactly k children; each ... |
Solve the programming task below in a Python markdown code block.
You are given a string $t$ consisting of $n$ lowercase Latin letters and an integer number $k$.
Let's define a substring of some string $s$ with indices from $l$ to $r$ as $s[l \dots r]$.
Your task is to construct such string $s$ of minimum possible l... |
Solve the programming task below in a Python markdown code block.
problem
One day in the cold winter, JOI Taro decided to break the thin ice in the plaza and play. The square is rectangular and is divided into m sections in the east-west direction and n sections in the north-south direction, that is, m × n. In additi... |
Solve the programming task below in a Python markdown code block.
[Image]
As some of you know, cubism is a trend in art, where the problem of constructing volumetrical shape on a plane with a combination of three-dimensional geometric shapes comes to the fore.
A famous sculptor Cicasso, whose self-portrait you can... |
Solve the programming task below in a Python markdown code block.
Create a program that reads poker hand data and outputs the role for each. However, this issue follows the rules below.
* Poker is a competition with 5 playing cards.
* No more than 5 cards with the same number.
* There is no joker.
* Suppose you only ... |
Solve the programming task below in a Python markdown code block.
Description
THE BY DOLM @ STER is a training simulation game scheduled to be released on EXIDNA by 1rem on April 1, 2010. For the time being, it probably has nothing to do with an arcade game where the network connection service stopped earlier this mo... |
Solve the programming task below in a Python markdown code block.
Tokitsukaze and CSL are playing a little game of stones.
In the beginning, there are $n$ piles of stones, the $i$-th pile of which has $a_i$ stones. The two players take turns making moves. Tokitsukaze moves first. On each turn the player chooses a non... |
Solve the programming task below in a Python markdown code block.
You are given two integers $n$ and $k$. Your task is to find if $n$ can be represented as a sum of $k$ distinct positive odd (not divisible by $2$) integers or not.
You have to answer $t$ independent test cases.
-----Input-----
The first line of the... |
Solve the programming task below in a Python markdown code block.
Little girl Susie went shopping with her mom and she wondered how to improve service quality.
There are n people in the queue. For each person we know time t_{i} needed to serve him. A person will be disappointed if the time he waits is more than the ... |
Solve the programming task below in a Python markdown code block.
Sasha likes programming. Once, during a very long contest, Sasha decided that he was a bit tired and needed to relax. So he did. But since Sasha isn't an ordinary guy, he prefers to relax unusually. During leisure time Sasha likes to upsolve unsolved pr... |
Solve the programming task below in a Python markdown code block.
This is yet another problem on regular bracket sequences.
A bracket sequence is called regular, if by inserting "+" and "1" into it we get a correct mathematical expression. For example, sequences "(())()", "()" and "(()(()))" are regular, while ")(", ... |
Solve the programming task below in a Python markdown code block.
The clique problem is one of the most well-known NP-complete problems. Under some simplification it can be formulated as follows. Consider an undirected graph G. It is required to find a subset of vertices C of the maximum size such that any two of them... |
Solve the programming task below in a Python markdown code block.
You are given a ternary string (it is a string which consists only of characters '0', '1' and '2').
You can swap any two adjacent (consecutive) characters '0' and '1' (i.e. replace "01" with "10" or vice versa) or any two adjacent (consecutive) charact... |
Solve the programming task below in a Python markdown code block.
Yaroslav likes algorithms. We'll describe one of his favorite algorithms.
1. The algorithm receives a string as the input. We denote this input string as a.
2. The algorithm consists of some number of command. Сommand number i looks either as si >... |
Solve the programming task below in a Python markdown code block.
You are given two integers $a$ and $b$. You may perform any number of operations on them (possibly zero).
During each operation you should choose any positive integer $x$ and set $a := a - x$, $b := b - 2x$ or $a := a - 2x$, $b := b - x$. Note that you... |
Solve the programming task below in a Python markdown code block.
Not to be confused with chessboard.
[Image]
-----Input-----
The first line of input contains a single integer N (1 ≤ N ≤ 100) — the number of cheeses you have.
The next N lines describe the cheeses you have. Each line contains two space-separated... |
Solve the programming task below in a Python markdown code block.
If we multiply the integer `717 (n)` by `7 (k)`, the result will be equal to `5019`.
Consider all the possible ways that this last number may be split as a string and calculate their corresponding sum obtained by adding the substrings as integers.... |
Solve the programming task below in a Python markdown code block.
Warawreh created a great company called Nanosoft. The only thing that Warawreh still has to do is to place a large picture containing its logo on top of the company's building.
The logo of Nanosoft can be described as four squares of the same size merg... |
Solve the programming task below in a Python markdown code block.
Let us call two integers $x$ and $y$ adjacent if $\frac{lcm(x, y)}{gcd(x, y)}$ is a perfect square. For example, $3$ and $12$ are adjacent, but $6$ and $9$ are not.
Here $gcd(x, y)$ denotes the greatest common divisor (GCD) of integers $x$ and $y$, and... |
Solve the programming task below in a Python markdown code block.
Igor found out discounts in a shop and decided to buy n items. Discounts at the store will last for a week and Igor knows about each item that its price now is a_{i}, and after a week of discounts its price will be b_{i}.
Not all of sellers are honest,... |
Solve the programming task below in a Python markdown code block.
You are given two arrays of length $n$: $a_1, a_2, \dots, a_n$ and $b_1, b_2, \dots, b_n$.
You can perform the following operation any number of times:
Choose integer index $i$ ($1 \le i \le n$);
Swap $a_i$ and $b_i$.
What is the minimum possible su... |
Solve the programming task below in a Python markdown code block.
We have A cards, each of which has an integer 1 written on it. Similarly, we also have B cards with 0s and C cards with -1s.
We will pick up K among these cards. What is the maximum possible sum of the numbers written on the cards chosen?
-----Constrai... |
Solve the programming task below in a Python markdown code block.
There are $n$ seats in the train's car and there is exactly one passenger occupying every seat. The seats are numbered from $1$ to $n$ from left to right. The trip is long, so each passenger will become hungry at some moment of time and will go to take ... |
Solve the programming task below in a Python markdown code block.
Alice got many presents these days. So she decided to pack them into boxes and send them to her friends.
There are $n$ kinds of presents. Presents of one kind are identical (i.e. there is no way to distinguish two gifts of the same kind). Presents of d... |
Solve the programming task below in a Python markdown code block.
You are given several queries. Each query consists of three integers $p$, $q$ and $b$. You need to answer whether the result of $p/q$ in notation with base $b$ is a finite fraction.
A fraction in notation with base $b$ is finite if it contains finite n... |
Solve the programming task below in a Python markdown code block.
You know that the Martians use a number system with base k. Digit b (0 ≤ b < k) is considered lucky, as the first contact between the Martians and the Earthlings occurred in year b (by Martian chronology).
A digital root d(x) of number x is a number th... |
Solve the programming task below in a Python markdown code block.
Goa'uld Apophis captured Jack O'Neill's team again! Jack himself was able to escape, but by that time Apophis's ship had already jumped to hyperspace. But Jack knows on what planet will Apophis land. In order to save his friends, Jack must repeatedly go... |
Solve the programming task below in a Python markdown code block.
You are given integers N and M.
Consider a sequence a of length N consisting of positive integers such that a_1 + a_2 + ... + a_N = M. Find the maximum possible value of the greatest common divisor of a_1, a_2, ..., a_N.
-----Constraints-----
- All va... |
Solve the programming task below in a Python markdown code block.
Let's define $S(x)$ to be the sum of digits of number $x$ written in decimal system. For example, $S(5) = 5$, $S(10) = 1$, $S(322) = 7$.
We will call an integer $x$ interesting if $S(x + 1) < S(x)$. In each test you will be given one integer $n$. Your ... |
Solve the programming task below in a Python markdown code block.
The alphabetized kata
---------------------
Re-order the characters of a string, so that they are concatenated into a new string in "case-insensitively-alphabetical-order-of-appearance" order. Whitespace and punctuation shall simply be removed!
The in... |
Solve the programming task below in a Python markdown code block.
Someone give a strange birthday present to Ivan. It is hedgehog — connected undirected graph in which one vertex has degree at least $3$ (we will call it center) and all other vertices has degree 1. Ivan thought that hedgehog is too boring and decided t... |
Solve the programming task below in a Python markdown code block.
You have a rectangular chocolate bar consisting of n × m single squares. You want to eat exactly k squares, so you may need to break the chocolate bar.
In one move you can break any single rectangular piece of chocolate in two rectangular pieces. You ... |
Solve the programming task below in a Python markdown code block.
You are given an array $a$ consisting of $n$ integers. In one move, you can jump from the position $i$ to the position $i - a_i$ (if $1 \le i - a_i$) or to the position $i + a_i$ (if $i + a_i \le n$).
For each position $i$ from $1$ to $n$ you want to k... |
Solve the programming task below in a Python markdown code block.
You have an array a with length n, you can perform operations. Each operation is like this: choose two adjacent elements from a, say x and y, and replace one of them with gcd(x, y), where gcd denotes the [greatest common divisor](https://en.wikipedia.or... |
Solve the programming task below in a Python markdown code block.
Manao is taking part in a quiz. The quiz consists of n consecutive questions. A correct answer gives one point to the player. The game also has a counter of consecutive correct answers. When the player answers a question correctly, the number on this co... |
Solve the programming task below in a Python markdown code block.
In Takahashi Kingdom, there is an archipelago of N islands, called Takahashi Islands. For convenience, we will call them Island 1, Island 2, ..., Island N.
There are M kinds of regular boat services between these islands. Each service connects two isla... |
Solve the programming task below in a Python markdown code block.
Kefa wants to celebrate his first big salary by going to restaurant. However, he needs company.
Kefa has n friends, each friend will agree to go to the restaurant if Kefa asks. Each friend is characterized by the amount of money he has and the friends... |
Solve the programming task below in a Python markdown code block.
A boy named Ayrat lives on planet AMI-1511. Each inhabitant of this planet has a talent. Specifically, Ayrat loves running, moreover, just running is not enough for him. He is dreaming of making running a real art.
First, he wants to construct the runn... |
Solve the programming task below in a Python markdown code block.
A little boy Laurenty has been playing his favourite game Nota for quite a while and is now very hungry. The boy wants to make sausage and cheese sandwiches, but first, he needs to buy a sausage and some cheese.
The town where Laurenty lives in is not ... |
Solve the programming task below in a Python markdown code block.
Limak is a little polar bear. He plays by building towers from blocks. Every block is a cube with positive integer length of side. Limak has infinitely many blocks of each side length.
A block with side a has volume a3. A tower consisting of blocks wit... |
Solve the programming task below in a Python markdown code block.
The [Sharkovsky's Theorem](https://en.wikipedia.org/wiki/Sharkovskii%27s_theorem) involves the following ordering of the natural numbers:
```math
3≺5≺7≺9≺ ...\\
≺2·3≺2·5≺2·7≺2·9≺...\\
≺2^n·3≺2^n·5≺2^n·7≺2^n·9≺...\\
≺2^{(n+1)}·3≺2^{(n+1)}·5≺2^{(n+1)}·7≺2... |
Solve the programming task below in a Python markdown code block.
Maria is the most active old lady in her house. She was tired of sitting at home. She decided to organize a ceremony against the coronavirus.
She has $n$ friends who are also grannies (Maria is not included in this number). The $i$-th granny is ready t... |
Solve the programming task below in a Python markdown code block.
You like the card board game "Set". Each card contains $k$ features, each of which is equal to a value from the set $\{0, 1, 2\}$. The deck contains all possible variants of cards, that is, there are $3^k$ different cards in total.
A feature for three ... |
Solve the programming task below in a Python markdown code block.
You are given two strings s and t consisting of lowercase Latin letters. The length of t is 2 (i.e. this string consists only of two characters).
In one move, you can choose any character of s and replace it with any lowercase Latin letter. More formal... |
Solve the programming task below in a Python markdown code block.
ButCoder Inc. runs a programming competition site called ButCoder. In this site, a user is given an integer value called rating that represents his/her skill, which changes each time he/she participates in a contest. The initial value of a new user's ra... |
Solve the programming task below in a Python markdown code block.
A tree is a connected graph without cycles. A rooted tree has a special vertex called the root. The parent of a vertex $v$ (different from root) is the previous to $v$ vertex on the shortest path from the root to the vertex $v$. Children of the vertex $... |
Solve the programming task below in a Python markdown code block.
You have been assigned to develop a filter for bad messages in the in-game chat. A message is a string $S$ of length $n$, consisting of lowercase English letters and characters ')'. The message is bad if the number of characters ')' at the end of the st... |
Solve the programming task below in a Python markdown code block.
Implement a function, so it will produce a sentence out of the given parts.
Array of parts could contain:
- words;
- commas in the middle;
- multiple periods at the end.
Sentence making rules:
- there must always be a space between words;
- there must... |
Solve the programming task below in a Python markdown code block.
You are given n integers a_1, a_2, ..., a_{n}. Find the number of pairs of indexes i, j (i < j) that a_{i} + a_{j} is a power of 2 (i. e. some integer x exists so that a_{i} + a_{j} = 2^{x}).
-----Input-----
The first line contains the single positiv... |
Solve the programming task below in a Python markdown code block.
Snuke has decided to play with a six-sided die. Each of its six sides shows an integer 1 through 6, and two numbers on opposite sides always add up to 7.
Snuke will first put the die on the table with an arbitrary side facing upward, then repeatedly pe... |
Solve the programming task below in a Python markdown code block.
A pair of positive integers $(a,b)$ is called special if $\lfloor \frac{a}{b} \rfloor = a mod b$. Here, $\lfloor \frac{a}{b} \rfloor$ is the result of the integer division between $a$ and $b$, while $a mod b$ is its remainder.
You are given two integer... |
Solve the programming task below in a Python markdown code block.
Heidi the Cow is aghast: cracks in the northern Wall? Zombies gathering outside, forming groups, preparing their assault? This must not happen! Quickly, she fetches her HC^2 (Handbook of Crazy Constructions) and looks for the right chapter:
How to buil... |
Solve the programming task below in a Python markdown code block.
This kata is part of the collection [Mary's Puzzle Books](https://www.codewars.com/collections/marys-puzzle-books).
# Zero Terminated Sum
Mary has another puzzle book, and it's up to you to help her out! This book is filled with zero-terminated substr... |
Solve the programming task below in a Python markdown code block.
One day n friends gathered together to play "Mafia". During each round of the game some player must be the supervisor and other n - 1 people take part in the game. For each person we know in how many rounds he wants to be a player, not the supervisor: t... |
Solve the programming task below in a Python markdown code block.
Chef Al Gorithm was reading a book about climate and oceans when he encountered the word “glaciological”. He thought it was quite curious, because it has the following interesting property: For every two letters in the word, if the first appears x times... |
Solve the programming task below in a Python markdown code block.
Two players play a game. The game is played on a rectangular board with n × m squares. At the beginning of the game two different squares of the board have two chips. The first player's goal is to shift the chips to the same square. The second player ai... |
Solve the programming task below in a Python markdown code block.
Generalized leap year
Normally, whether or not the year x is a leap year is defined as follows.
1. If x is a multiple of 400, it is a leap year.
2. Otherwise, if x is a multiple of 100, it is not a leap year.
3. Otherwise, if x is a multiple of 4, it ... |
Solve the programming task below in a Python markdown code block.
A Hitachi string is a concatenation of one or more copies of the string `hi`.
For example, `hi` and `hihi` are Hitachi strings, while `ha` and `hii` are not.
Given a string S, determine whether S is a Hitachi string.
Constraints
* The length of S is... |
Solve the programming task below in a Python markdown code block.
Mister B once received a gift: it was a book about aliens, which he started read immediately. This book had c pages.
At first day Mister B read v_0 pages, but after that he started to speed up. Every day, starting from the second, he read a pages more ... |
Solve the programming task below in a Python markdown code block.
Binary with 0 and 1 is good, but binary with only 0 is even better! Originally, this is a concept designed by Chuck Norris to send so called unary messages.
Can you write a program that can send and receive this messages?
Rules
The input message cons... |
Solve the programming task below in a Python markdown code block.
Attention: we lost all the test cases for this problem, so instead of solving the problem, we need you to generate test cases. We're going to give you the answer, and you need to print a test case that produces the given answer. The original problem is ... |
Solve the programming task below in a Python markdown code block.
There is a country with n citizens. The i-th of them initially has a_{i} money. The government strictly controls the wealth of its citizens. Whenever a citizen makes a purchase or earns some money, they must send a receipt to the social services mention... |
Solve the programming task below in a Python markdown code block.
One day Alex decided to remember childhood when computers were not too powerful and lots of people played only default games. Alex enjoyed playing Minesweeper that time. He imagined that he saved world from bombs planted by terrorists, but he rarely won... |
Solve the programming task below in a Python markdown code block.
A k-multiple free set is a set of integers where there is no pair of integers where one is equal to another integer multiplied by k. That is, there are no two integers x and y (x < y) from the set, such that y = x·k.
You're given a set of n distinct po... |
Solve the programming task below in a Python markdown code block.
You are given N integers. The i-th integer is a_i. Find the number, modulo 998244353, of ways to paint each of the integers red, green or blue so that the following condition is satisfied:
* Let R, G and B be the sums of the integers painted red, green... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.