question large_stringlengths 265 13.2k |
|---|
Solve the programming task below in a Python markdown code block.
There is a river of width $n$. The left bank of the river is cell $0$ and the right bank is cell $n + 1$ (more formally, the river can be represented as a sequence of $n + 2$ cells numbered from $0$ to $n + 1$). There are also $m$ wooden platforms on a ... |
Solve the programming task below in a Python markdown code block.
Berland State University invites people from all over the world as guest students. You can come to the capital of Berland and study with the best teachers in the country.
Berland State University works every day of the week, but classes for guest stude... |
Solve the programming task below in a Python markdown code block.
Let's call an array $a$ consisting of $n$ positive (greater than $0$) integers beautiful if the following condition is held for every $i$ from $1$ to $n$: either $a_i = 1$, or at least one of the numbers $a_i - 1$ and $a_i - 2$ exists in the array as we... |
Solve the programming task below in a Python markdown code block.
We define the function `f1(n,k)`, as the least multiple of `n` that has all its digits less than `k`.
We define the function `f2(n,k)`, as the least multiple of `n` that has all the digits that are less than `k`.
Each digit may occur more than once i... |
Solve the programming task below in a Python markdown code block.
Alice guesses the strings that Bob made for her.
At first, Bob came up with the secret string $a$ consisting of lowercase English letters. The string $a$ has a length of $2$ or more characters. Then, from string $a$ he builds a new string $b$ and offer... |
Solve the programming task below in a Python markdown code block.
Nicholas has an array a that contains n distinct integers from 1 to n. In other words, Nicholas has a permutation of size n.
Nicholas want the minimum element (integer 1) and the maximum element (integer n) to be as far as possible from each other. He ... |
Solve the programming task below in a Python markdown code block.
Mashmokh's boss, Bimokh, didn't like Mashmokh. So he fired him. Mashmokh decided to go to university and participate in ACM instead of finding a new job. He wants to become a member of Bamokh's team. In order to join he was given some programming tasks ... |
Solve the programming task below in a Python markdown code block.
Have you ever had an infinite loop when you ran a hard-working program? It would be convenient to be able to determine in advance whether a program will stop executing without having to execute it.
Unfortunately, it is not possible to make such a decis... |
Solve the programming task below in a Python markdown code block.
Finally, a basketball court has been opened in SIS, so Demid has decided to hold a basketball exercise session. $2 \cdot n$ students have come to Demid's exercise session, and he lined up them into two rows of the same size (there are exactly $n$ people... |
Solve the programming task below in a Python markdown code block.
There is a rectangular grid of n rows of m initially-white cells each.
Arkady performed a certain number (possibly zero) of operations on it. In the i-th operation, a non-empty subset of rows R_{i} and a non-empty subset of columns C_{i} are chosen. Fo... |
Solve the programming task below in a Python markdown code block.
Takahashi is standing on a two-dimensional plane, facing north. Find the minimum positive integer K such that Takahashi will be at the starting position again after he does the following action K times:
* Go one meter in the direction he is facing. The... |
Solve the programming task below in a Python markdown code block.
Number of tanka
Wishing to die in the spring under the flowers
This is one of the famous tanka poems that Saigyo Hoshi wrote. Tanka is a type of waka poem that has been popular in Japan for a long time, and most of it consists of five phrases and thir... |
Solve the programming task below in a Python markdown code block.
Paladin Manao caught the trail of the ancient Book of Evil in a swampy area. This area contains n settlements numbered from 1 to n. Moving through the swamp is very difficult, so people tramped exactly n - 1 paths. Each of these paths connects some pair... |
Solve the programming task below in a Python markdown code block.
Polycarp has found a table having an infinite number of rows and columns. The rows are numbered from $1$, starting from the topmost one. The columns are numbered from $1$, starting from the leftmost one.
Initially, the table hasn't been filled and Poly... |
Solve the programming task below in a Python markdown code block.
The Little Elephant loves chess very much.
One day the Little Elephant and his friend decided to play chess. They've got the chess pieces but the board is a problem. They've got an 8 × 8 checkered board, each square is painted either black or white. T... |
Solve the programming task below in a Python markdown code block.
The semester is already ending, so Danil made an effort and decided to visit a lesson on harmony analysis to know how does the professor look like, at least. Danil was very bored on this lesson until the teacher gave the group a simple task: find 4 vect... |
Solve the programming task below in a Python markdown code block.
Every Codeforces user has rating, described with one integer, possibly negative or zero. Users are divided into two divisions. The first division is for users with rating 1900 or higher. Those with rating 1899 or lower belong to the second division. In ... |
Solve the programming task below in a Python markdown code block.
Reca company makes monitors, the most popular of their models is AB999 with the screen size a × b centimeters. Because of some production peculiarities a screen parameters are integer numbers. Recently the screen sides ratio x: y became popular with use... |
Solve the programming task below in a Python markdown code block.
Recall that the permutation is an array consisting of $n$ distinct integers from $1$ to $n$ in arbitrary order. For example, $[2,3,1,5,4]$ is a permutation, but $[1,2,2]$ is not a permutation ($2$ appears twice in the array) and $[1,3,4]$ is also not a ... |
Solve the programming task below in a Python markdown code block.
The Cybermen solved that first test much quicker than the Daleks. Luckily for us, the Daleks were angry (shocking!) and they destroyed some of the Cybermen.
After the fighting stopped, Heidi gave them another task to waste their time on.
There are $n$... |
Solve the programming task below in a Python markdown code block.
Programmer Sasha has recently begun to study data structures. His coach Stas told him to solve the problem of finding a minimum on the segment of the array in <image>, which Sasha coped with. For Sasha not to think that he had learned all, Stas gave him... |
Solve the programming task below in a Python markdown code block.
If we alternate the vowels and consonants in the string `"have"`, we get the following list, arranged alphabetically:
`['ahev', 'aveh', 'ehav', 'evah', 'vahe', 'veha']`. These are the only possibilities in which vowels and consonants are alternated. The... |
Solve the programming task below in a Python markdown code block.
Division of Big Integers
Given two integers $A$ and $B$, compute the quotient, $\frac{A}{B}$. Round down to the nearest decimal.
Input
Two integers $A$ and $B$ separated by a space character are given in a line.
Output
Print the quotient in a line.... |
Solve the programming task below in a Python markdown code block.
Vasya has n items lying in a line. The items are consecutively numbered by numbers from 1 to n in such a way that the leftmost item has number 1, the rightmost item has number n. Each item has a weight, the i-th item weights wi kilograms.
Vasya needs t... |
Solve the programming task below in a Python markdown code block.
Write a function that checks the braces status in a string, and return `True` if all braces are properly closed, or `False` otherwise. Available types of brackets: `()`, `[]`, `{}`.
**Please note, you need to write this function without using regex!**
... |
Solve the programming task below in a Python markdown code block.
Rng is going to a festival.
The name of the festival is given to you as a string S, which ends with `FESTIVAL`, from input. Answer the question: "Rng is going to a festival of what?" Output the answer.
Here, assume that the name of "a festival of s" i... |
Solve the programming task below in a Python markdown code block.
problem
I want to put as many rectangular tiles as possible on a rectangular wall with a size of $ h $ in height and $ w $ in width, and a size of $ a $ in height and $ b $ in width.
The following conditions must be met when attaching tiles.
* Do no... |
Solve the programming task below in a Python markdown code block.
You are given three integers $a$, $b$, and $c$. Determine if one of them is the sum of the other two.
-----Input-----
The first line contains a single integer $t$ ($1 \leq t \leq 9261$) — the number of test cases.
The description of each test case c... |
Solve the programming task below in a Python markdown code block.
As a strict big brother, I do limit my young brother Vasya on time he spends on computer games. I define a prime-time as a time period till which Vasya have a permission to play computer games. I specify start hour and end hour as pair of integers.
I n... |
Solve the programming task below in a Python markdown code block.
As you know, majority of students and teachers of Summer Informatics School live in Berland for the most part of the year. Since corruption there is quite widespread, the following story is not uncommon.
Elections are coming. You know the number of vot... |
Solve the programming task below in a Python markdown code block.
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 t... |
Solve the programming task below in a Python markdown code block.
Ringo Mart, a convenience store, sells apple juice.
On the opening day of Ringo Mart, there were A cans of juice in stock in the morning. Snuke buys B cans of juice here every day in the daytime. Then, the manager checks the number of cans of juice rem... |
Solve the programming task below in a Python markdown code block.
Jack decides to invite Emma out for a dinner. Jack is a modest student, he doesn't want to go to an expensive restaurant. Emma is a girl with high taste, she prefers elite places.
Munhattan consists of n streets and m avenues. There is exactly one rest... |
Solve the programming task below in a Python markdown code block.
You are going to be given an array of integers. Your job is to take that array and find an index N where the sum of the integers to the left of N is equal to the sum of the integers to the right of N. If there is no index that would make this happen, re... |
Solve the programming task below in a Python markdown code block.
Today there is going to be an unusual performance at the circus — hamsters and tigers will perform together! All of them stand in circle along the arena edge and now the trainer faces a difficult task: he wants to swap the animals' positions so that all... |
Solve the programming task below in a Python markdown code block.
A smelt fishing tournament was held at Lake Hibara. The winner is the one who wins the most smelt.
Create a program that reads the list of participant numbers and the number of fish caught and outputs the number of winners and the number of fish caught... |
Solve the programming task below in a Python markdown code block.
We have a string S of length N consisting of A, T, C, and G.
Strings T_1 and T_2 of the same length are said to be complementary when, for every i (1 \leq i \leq l), the i-th character of T_1 and the i-th character of T_2 are complementary. Here, A and ... |
Solve the programming task below in a Python markdown code block.
You have a garden consisting entirely of grass and weeds. Your garden is described by an n × m grid, with rows numbered 1 to n from top to bottom, and columns 1 to m from left to right. Each cell is identified by a pair (r, c) which means that the cell ... |
Solve the programming task below in a Python markdown code block.
Something happened in Uzhlyandia again... There are riots on the streets... Famous Uzhlyandian superheroes Shean the Sheep and Stas the Giraffe were called in order to save the situation. Upon the arriving, they found that citizens are worried about max... |
Solve the programming task below in a Python markdown code block.
Your task is to calculate the distance between two $n$ dimensional vectors $x = \\{x_1, x_2, ..., x_n\\}$ and $y = \\{y_1, y_2, ..., y_n\\}$.
The Minkowski's distance defined below is a metric which is a generalization of both the Manhattan distance an... |
Solve the programming task below in a Python markdown code block.
Let's consider a simplified version of order book of some stock. The order book is a list of orders (offers) from people that want to buy or sell one unit of the stock, each order is described by direction (BUY or SELL) and price.
At every moment of ti... |
Solve the programming task below in a Python markdown code block.
Alice and Bob are playing a game of coins. N coins are placed on the table in a row.
The game begins with Alice and afterwards they alternate the moves.
A valid move is defined as follows:
You pick one coin or two adjacent coins and remove them.
Th... |
Solve the programming task below in a Python markdown code block.
The cat Snuke wants to play a popular Japanese game called ÅtCoder, so Iroha has decided to teach him Japanese.
When counting pencils in Japanese, the counter word "本" follows the number. The pronunciation of this word varies depending on the number. Sp... |
Solve the programming task below in a Python markdown code block.
Given a standard english sentence passed in as a string, write a method that will return a sentence made up of the same words, but sorted by their first letter. However, the method of sorting has a twist to it:
* All words that begin with a lower case l... |
Solve the programming task below in a Python markdown code block.
There are 3^N people dancing in circle. We denote with 0,1,\dots, 3^{N}-1 the positions in the circle, starting from an arbitrary position and going around clockwise. Initially each position in the circle is occupied by one person.
The people are going... |
Solve the programming task below in a Python markdown code block.
You are given a sequence $a$ consisting of $n$ integers $a_1, a_2, \dots, a_n$, and an integer $x$. Your task is to make the sequence $a$ sorted (it is considered sorted if the condition $a_1 \le a_2 \le a_3 \le \dots \le a_n$ holds).
To make the seque... |
Solve the programming task below in a Python markdown code block.
Consider the following numbers (where `n!` is `factorial(n)`):
```
u1 = (1 / 1!) * (1!)
u2 = (1 / 2!) * (1! + 2!)
u3 = (1 / 3!) * (1! + 2! + 3!)
...
un = (1 / n!) * (1! + 2! + 3! + ... + n!)
```
Which will win: `1 / n!` or `(1! + 2! + 3! + ... + n!)`?
... |
Solve the programming task below in a Python markdown code block.
[Image]
It's the end of July – the time when a festive evening is held at Jelly Castle! Guests from all over the kingdom gather here to discuss new trends in the world of confectionery. Yet some of the things discussed here are not supposed to be disc... |
Solve the programming task below in a Python markdown code block.
To get money for a new aeonic blaster, ranger Qwerty decided to engage in trade for a while. He wants to buy some number of items (or probably not to buy anything at all) on one of the planets, and then sell the bought items on another planet. Note that... |
Solve the programming task below in a Python markdown code block.
You are given a table consisting of n rows and m columns.
Numbers in each row form a permutation of integers from 1 to m.
You are allowed to pick two elements in one row and swap them, but no more than once for each row. Also, no more than once you ar... |
Solve the programming task below in a Python markdown code block.
Write a function that returns the number of '2's in the factorization of a number.
For example,
```python
two_count(24)
```
should return 3, since the factorization of 24 is 2^3 x 3
```python
two_count(17280)
```
should return 7, since the factorizati... |
Solve the programming task below in a Python markdown code block.
You have an array $a_1, a_2, \dots, a_n$.
Let's call some subarray $a_l, a_{l + 1}, \dots , a_r$ of this array a subpermutation if it contains all integers from $1$ to $r-l+1$ exactly once. For example, array $a = [2, 2, 1, 3, 2, 3, 1]$ contains $6$ s... |
Solve the programming task below in a Python markdown code block.
Jzzhu is the president of country A. There are n cities numbered from 1 to n in his country. City 1 is the capital of A. Also there are m roads connecting the cities. One can go from city ui to vi (and vise versa) using the i-th road, the length of this... |
Solve the programming task below in a Python markdown code block.
In some country there are exactly n cities and m bidirectional roads connecting the cities. Cities are numbered with integers from 1 to n. If cities a and b are connected by a road, then in an hour you can go along this road either from city a to city b... |
Solve the programming task below in a Python markdown code block.
Given a set of $N$ axis-aligned rectangular seals, find the number of overlapped seals on the region which has the maximum number of overlapped seals.
Constraints
* $ 1 \leq N \leq 100000 $
* $ 0 \leq x1_i < x2_i \leq 1000 $
* $ 0 \leq y1_i < y2_i \le... |
Solve the programming task below in a Python markdown code block.
It is 2050 and romance has long gone, relationships exist solely for practicality.
MatchMyHusband is a website that matches busy working women with perfect house husbands. You have been employed by MatchMyHusband to write a function that determines who... |
Solve the programming task below in a Python markdown code block.
Polycarpus works as a DJ in the best Berland nightclub, and he often uses dubstep music in his performance. Recently, he has decided to take a couple of old songs and make dubstep remixes from them.
Let's assume that a song consists of some number of w... |
Solve the programming task below in a Python markdown code block.
The final round of Bayan Programming Contest will be held in Tehran, and the participants will be carried around with a yellow bus. The bus has 34 passenger seats: 4 seats in the last row and 3 seats in remaining rows. [Image]
The event coordinator h... |
Solve the programming task below in a Python markdown code block.
Consider an infinite triangle made up of layers. Let's number the layers, starting from one, from the top of the triangle (from top to bottom). The $k$-th layer of the triangle contains $k$ points, numbered from left to right. Each point of an infinite ... |
Solve the programming task below in a Python markdown code block.
Takahashi Lake has a perimeter of L. On the circumference of the lake, there is a residence of the lake's owner, Takahashi. Each point on the circumference of the lake has a coordinate between 0 and L (including 0 but not L), which is the distance from ... |
Solve the programming task below in a Python markdown code block.
Recently Vasya learned that, given two points with different x coordinates, you can draw through them exactly one parabola with equation of type y = x^2 + bx + c, where b and c are reals. Let's call such a parabola an U-shaped one.
Vasya drew several d... |
Solve the programming task below in a Python markdown code block.
You are given a string $s$. You have to reverse it — that is, the first letter should become equal to the last letter before the reversal, the second letter should become equal to the second-to-last letter before the reversal — and so on. For example, i... |
Solve the programming task below in a Python markdown code block.
# Valid HK Phone Number
## Overview
In Hong Kong, a valid phone number has the format ```xxxx xxxx``` where ```x``` is a decimal digit (0-9). For example:
## Task
Define two functions, ```isValidHKPhoneNumber``` and ```hasValidHKPhoneNumber```, tha... |
Solve the programming task below in a Python markdown code block.
```if-not:sql
Create a function (or write a script in Shell) that takes an integer as an argument and returns "Even" for even numbers or "Odd" for odd numbers.
```
```if:sql
## SQL Notes:
You will be given a table, `numbers`, with one column `number`.
... |
Solve the programming task below in a Python markdown code block.
Professor GukiZ likes programming contests. He especially likes to rate his students on the contests he prepares. Now, he has decided to prepare a new contest.
In total, n students will attend, and before the start, every one of them has some positive... |
Solve the programming task below in a Python markdown code block.
In the final of CODE FESTIVAL in some year, there are N participants. The height and power of Participant i is H_i and P_i, respectively.
Ringo is hosting a game of stacking zabuton (cushions).
The participants will line up in a row in some order, and... |
Solve the programming task below in a Python markdown code block.
In this Kata, you will be given a multi-dimensional array containing `2 or more` sub-arrays of integers. Your task is to find the maximum product that can be formed by taking any one element from each sub-array.
```
Examples:
solve( [[1, 2],[3, 4]] ) =... |
Solve the programming task below in a Python markdown code block.
Write a program which reads the two dices constructed in the same way as Dice I, and determines whether these two dices are identical. You can roll a dice in the same way as Dice I, and if all integers observed from the six directions are the same as th... |
Solve the programming task below in a Python markdown code block.
Easy and hard versions are actually different problems, so read statements of both problems completely and carefully.
Summer vacation has started so Alice and Bob want to play and joy, but... Their mom doesn't think so. She says that they have to read ... |
Solve the programming task below in a Python markdown code block.
A wildlife study involving ducks is taking place in North America. Researchers are visiting some wetlands in a certain area taking a survey of what they see. The researchers will submit reports that need to be processed by your function.
## Input
The... |
Solve the programming task below in a Python markdown code block.
Polycarp has a checkered sheet of paper of size n × m. Polycarp painted some of cells with black, the others remained white. Inspired by Malevich's "Black Square", Polycarp wants to paint minimum possible number of white cells with black so that all bla... |
Solve the programming task below in a Python markdown code block.
Amr bought a new video game "Guess Your Way Out!". The goal of the game is to find an exit from the maze that looks like a perfect binary tree of height h. The player is initially standing at the root of the tree and the exit from the tree is located at... |
Solve the programming task below in a Python markdown code block.
You are playing a computer card game called Splay the Sire. Currently you are struggling to defeat the final boss of the game.
The boss battle consists of $n$ turns. During each turn, you will get several cards. Each card has two parameters: its cost $... |
Solve the programming task below in a Python markdown code block.
Given a triangle of consecutive odd numbers:
```
1
3 5
7 9 11
13 15 17 19
21 23 25 27 29
...
```
find the triangle's row knowing its index (the rows are 1-indexed), e.g.:
```
odd_row(1)... |
Solve the programming task below in a Python markdown code block.
Sereja is a coder and he likes to take part in Codesorfes rounds. However, Uzhland doesn't have good internet connection, so Sereja sometimes skips rounds.
Codesorfes has rounds of two types: Div1 (for advanced coders) and Div2 (for beginner coders). T... |
Solve the programming task below in a Python markdown code block.
This problem is different from the hard version. In this version Ujan makes exactly one exchange. You can hack this problem only if you solve both problems.
After struggling and failing many times, Ujan decided to try to clean up his house again. He de... |
Solve the programming task below in a Python markdown code block.
You are given a permutation $p_1, p_2, \ldots, p_n$ of integers from $1$ to $n$ and an integer $k$, such that $1 \leq k \leq n$. A permutation means that every number from $1$ to $n$ is contained in $p$ exactly once.
Let's consider all partitions of th... |
Solve the programming task below in a Python markdown code block.
Dima and Seryozha live in an ordinary dormitory room for two. One day Dima had a date with his girl and he asked Seryozha to leave the room. As a compensation, Seryozha made Dima do his homework.
The teacher gave Seryozha the coordinates of n distinct ... |
Solve the programming task below in a Python markdown code block.
Natasha's favourite numbers are $n$ and $1$, and Sasha's favourite numbers are $m$ and $-1$. One day Natasha and Sasha met and wrote down every possible array of length $n+m$ such that some $n$ of its elements are equal to $1$ and another $m$ elements a... |
Solve the programming task below in a Python markdown code block.
You should write a simple function that takes string as input and checks if it is a valid Russian postal code, returning `true` or `false`.
A valid postcode should be 6 digits with no white spaces, letters or other symbols. Empty string should also ret... |
Solve the programming task below in a Python markdown code block.
Welcome to Innopolis city. Throughout the whole year, Innopolis citizens suffer from everlasting city construction.
From the window in your room, you see the sequence of n hills, where i-th of them has height a_{i}. The Innopolis administration wants ... |
Solve the programming task below in a Python markdown code block.
We call a string good, if after merging all the consecutive equal characters, the resulting string is palindrome. For example, "aabba" is good, because after the merging step it will become "aba".
Given a string, you have to find two values: the numbe... |
Solve the programming task below in a Python markdown code block.
Mad scientist Mike is busy carrying out experiments in chemistry. Today he will attempt to join three atoms into one molecule.
A molecule consists of atoms, with some pairs of atoms connected by atomic bonds. Each atom has a valence number — the number... |
Solve the programming task below in a Python markdown code block.
A remote island chain contains n islands, labeled 1 through n. Bidirectional bridges connect the islands to form a simple cycle — a bridge connects islands 1 and 2, islands 2 and 3, and so on, and additionally a bridge connects islands n and 1. The cent... |
Solve the programming task below in a Python markdown code block.
One day Polycarpus got hold of two non-empty strings s and t, consisting of lowercase Latin letters. Polycarpus is quite good with strings, so he immediately wondered, how many different pairs of "x y" are there, such that x is a substring of string s, ... |
Solve the programming task below in a Python markdown code block.
Michael and Joe are playing a game. The game is played on a grid with $n$ rows and $m$ columns, filled with distinct integers. We denote the square on the $i$-th ($1\le i\le n$) row and $j$-th ($1\le j\le m$) column by $(i, j)$ and the number there by $... |
Solve the programming task below in a Python markdown code block.
During a recent research Berland scientists found out that there were n cities in Ancient Berland, joined by two-way paths. Any two cities are joined by no more than one path. No path joins a city with itself. According to a well-known tradition, the ro... |
Solve the programming task below in a Python markdown code block.
Thor is getting used to the Earth. As a gift Loki gave him a smartphone. There are n applications on this phone. Thor is fascinated by this phone. He has only one minor issue: he can't count the number of unread notifications generated by those applicat... |
Solve the programming task below in a Python markdown code block.
The employees of the F company have lots of ways to entertain themselves. Today they invited a famous magician who shows a trick with plastic cups and a marble.
The point is to trick the spectator's attention. Initially, the spectator stands in front o... |
Solve the programming task below in a Python markdown code block.
## Task
In your favorite game, you must shoot a target with a water-gun to gain points. Each target can be worth a different amount of points.
You are guaranteed to hit every target that you try to hit. You cannot hit consecutive targets though bec... |
Solve the programming task below in a Python markdown code block.
Polycarp has $x$ of red and $y$ of blue candies. Using them, he wants to make gift sets. Each gift set contains either $a$ red candies and $b$ blue candies, or $a$ blue candies and $b$ red candies. Any candy can belong to at most one gift set.
Help Pol... |
Solve the programming task below in a Python markdown code block.
You are given an array consisting of all integers from $[l, r]$ inclusive. For example, if $l = 2$ and $r = 5$, the array would be $[2, 3, 4, 5]$. What's the minimum number of elements you can delete to make the bitwise AND of the array non-zero?
A bit... |
Solve the programming task below in a Python markdown code block.
Description
Since the cubic equation: ax ^ 3 + bx ^ 2 + cx + d = 0 is given, please check the number of positive real roots and the number of negative real roots, respectively.
The number of roots shall be counted including the multiple roots.
Inpu... |
Solve the programming task below in a Python markdown code block.
Let's denote the median of a sequence $s$ with odd length as the value in the middle of $s$ if we sort $s$ in non-decreasing order. For example, let $s = [1, 2, 5, 7, 2, 3, 12]$. After sorting, we get sequence $[1, 2, 2, \underline{3}, 5, 7, 12]$, and t... |
Solve the programming task below in a Python markdown code block.
Alternate Escape
Alice House
Alice and Bob are playing board games. This board game is played using a board with squares in rows H and columns and one frame. In this game, the upper left square of the board is set as the 1st row and 1st column, and th... |
Solve the programming task below in a Python markdown code block.
You are given a number $n$ and an array $b_1, b_2, \ldots, b_{n+2}$, obtained according to the following algorithm:
some array $a_1, a_2, \ldots, a_n$ was guessed;
array $a$ was written to array $b$, i.e. $b_i = a_i$ ($1 \le i \le n$);
The $(n+1)$-th... |
Solve the programming task below in a Python markdown code block.
Osaki
Osaki
English text is not available in this practice contest.
The Yamanote Line is a circular railway line laid in the 23 wards of Tokyo. The total route distance is 34.5km, and one lap takes about one hour. There are 29 stations in total. The ... |
Solve the programming task below in a Python markdown code block.
In the beginning, Takahashi has A cookies, and Aoki has B cookies. They will perform the following operation alternately, starting from Takahashi:
* If the number of cookies in his hand is odd, eat one of those cookies; if the number is even, do nothin... |
Solve the programming task below in a Python markdown code block.
You are fishing with polar bears Alice and Bob. While waiting for the fish to bite, the polar bears get bored. They come up with a game. First Alice and Bob each writes a 01-string (strings that only contain character "0" and "1") a and b. Then you try ... |
Solve the programming task below in a Python markdown code block.
Karen is getting ready for a new school day!
[Image]
It is currently hh:mm, given in a 24-hour format. As you know, Karen loves palindromes, and she believes that it is good luck to wake up when the time is a palindrome.
What is the minimum number ... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.