question large_stringlengths 265 13.2k |
|---|
Solve the programming task below in a Python markdown code block.
ZS the Coder and Chris the Baboon has arrived at Udayland! They walked in the park where n trees grow. They decided to be naughty and color the trees in the park. The trees are numbered with integers from 1 to n from left to right.
Initially, tree i ha... |
Solve the programming task below in a Python markdown code block.
Nastya received one more array on her birthday, this array can be used to play a traditional Byteland game on it. However, to play the game the players should first select such a subsegment of the array that $\frac{p}{s} = k$, where p is the product of ... |
Solve the programming task below in a Python markdown code block.
Your task is to calculate the number of arrays such that: each array contains $n$ elements; each element is an integer from $1$ to $m$; for each array, there is exactly one pair of equal elements; for each array $a$, there exists an index $i$ such t... |
Solve the programming task below in a Python markdown code block.
Vanya and his friend Vova play a computer game where they need to destroy n monsters to pass a level. Vanya's character performs attack with frequency x hits per second and Vova's character performs attack with frequency y hits per second. Each characte... |
Solve the programming task below in a Python markdown code block.
A permutation p is an ordered group of numbers p_1, p_2, ..., p_{n}, consisting of n distinct positive integers, each is no more than n. We'll define number n as the length of permutation p_1, p_2, ..., p_{n}.
Simon has a positive integer n... |
Solve the programming task below in a Python markdown code block.
Along a road running in an east-west direction, there are A shrines and B temples.
The i-th shrine from the west is located at a distance of s_i meters from the west end of the road, and the i-th temple from the west is located at a distance of t_i mete... |
Solve the programming task below in a Python markdown code block.
In Takahashi Kingdom, there is a east-west railroad and N cities along it, numbered 1, 2, 3, ..., N from west to east.
A company called AtCoder Express possesses M trains, and the train i runs from City L_i to City R_i (it is possible that L_i = R_i).
T... |
Solve the programming task below in a Python markdown code block.
We have an integer N.
Print an integer x between N and 10^{13} (inclusive) such that, for every integer y between 2 and N (inclusive), the remainder when x is divided by y is 1.
Under the constraints of this problem, there is always at least one such in... |
Solve the programming task below in a Python markdown code block.
Olya loves energy drinks. She loves them so much that her room is full of empty cans from energy drinks.
Formally, her room can be represented as a field of n × m cells, each cell of which is empty or littered with cans.
Olya drank a lot of energy dri... |
Solve the programming task below in a Python markdown code block.
There are $n$ students in the first grade of Nlogonia high school. The principal wishes to split the students into two classrooms (each student must be in exactly one of the classrooms). Two distinct students whose name starts with the same letter will ... |
Solve the programming task below in a Python markdown code block.
Mahmoud was trying to solve the vertex cover problem on trees. The problem statement is:
Given an undirected tree consisting of n nodes, find the minimum number of vertices that cover all the edges. Formally, we need to find a set of vertices such that... |
Solve the programming task below in a Python markdown code block.
Valera has array a, consisting of n integers a_0, a_1, ..., a_{n} - 1, and function f(x), taking an integer from 0 to 2^{n} - 1 as its single argument. Value f(x) is calculated by formula $f(x) = \sum_{i = 0}^{n - 1} a_{i} \cdot b i t(i)$, where value b... |
Solve the programming task below in a Python markdown code block.
Little penguin Polo has an n × m matrix, consisting of integers. Let's index the matrix rows from 1 to n from top to bottom and let's index the columns from 1 to m from left to right. Let's represent the matrix element on the intersection of row i and c... |
Solve the programming task below in a Python markdown code block.
Recently Luba bought a very interesting book. She knows that it will take t seconds to read the book. Luba wants to finish reading as fast as she can.
But she has some work to do in each of n next days. The number of seconds that Luba has to spend work... |
Solve the programming task below in a Python markdown code block.
Little Susie listens to fairy tales before bed every day. Today's fairy tale was about wood cutters and the little girl immediately started imagining the choppers cutting wood. She imagined the situation that is described below.
There are n trees locat... |
Solve the programming task below in a Python markdown code block.
You are given a rooted tree with n vertices. The vertices are numbered from 1 to n, the root is the vertex number 1.
Each vertex has a color, let's denote the color of vertex v by c_{v}. Initially c_{v} = 0.
You have to color the tree into the given c... |
Solve the programming task below in a Python markdown code block.
There is a programming language in which every program is a non-empty sequence of "<" and ">" signs and digits. Let's explain how the interpreter of this programming language works. A program is interpreted using movement of instruction pointer (IP) whi... |
Solve the programming task below in a Python markdown code block.
You've got a undirected graph G, consisting of n nodes. We will consider the nodes of the graph indexed by integers from 1 to n. We know that each node of graph G is connected by edges with at least k other nodes of this graph. Your task is to find in t... |
Solve the programming task below in a Python markdown code block.
You are given two integers $n$ and $m$. Calculate the number of pairs of arrays $(a, b)$ such that:
the length of both arrays is equal to $m$; each element of each array is an integer between $1$ and $n$ (inclusive); $a_i \le b_i$ for any index $i$... |
Solve the programming task below in a Python markdown code block.
Kuro is living in a country called Uberland, consisting of $n$ towns, numbered from $1$ to $n$, and $n - 1$ bidirectional roads connecting these towns. It is possible to reach each town from any other. Each road connects two towns $a$ and $b$. Kuro love... |
Solve the programming task below in a Python markdown code block.
There are n phone numbers in Polycarp's contacts on his phone. Each number is a 9-digit integer, starting with a digit different from 0. All the numbers are distinct.
There is the latest version of Berdroid OS installed on Polycarp's phone. If some num... |
Solve the programming task below in a Python markdown code block.
When Valera has got some free time, he goes to the library to read some books. Today he's got t free minutes to read. That's why Valera took n books in the library and for each book he estimated the time he is going to need to read it. Let's number the ... |
Solve the programming task below in a Python markdown code block.
Polycarp is currently developing a project in Vaja language and using a popular dependency management system called Vamen. From Vamen's point of view both Vaja project and libraries are treated projects for simplicity.
A project in Vaja has its own uni... |
Solve the programming task below in a Python markdown code block.
Ivan wants to write a letter to his friend. The letter is a string s consisting of lowercase Latin letters.
Unfortunately, when Ivan started writing the letter, he realised that it is very long and writing the whole letter may take extremely long time.... |
Solve the programming task below in a Python markdown code block.
Simon has a prime number x and an array of non-negative integers a_1, a_2, ..., a_{n}.
Simon loves fractions very much. Today he wrote out number $\frac{1}{x^{a} 1} + \frac{1}{x^{a_{2}}} + \ldots + \frac{1}{x^{a_{n}}}$ on a piece of paper. After Simon ... |
Solve the programming task below in a Python markdown code block.
Asya loves animals very much. Recently, she purchased $n$ kittens, enumerated them from $1$ and $n$ and then put them into the cage. The cage consists of one row of $n$ cells, enumerated with integers from $1$ to $n$ from left to right. Adjacent cells h... |
Solve the programming task below in a Python markdown code block.
There is a forest that we model as a plane and live $n$ rare animals. Animal number $i$ has its lair in the point $(x_{i}, y_{i})$. In order to protect them, a decision to build a nature reserve has been made.
The reserve must have a form of a circle c... |
Solve the programming task below in a Python markdown code block.
At the big break Nastya came to the school dining room. There are $n$ pupils in the school, numbered from $1$ to $n$. Unfortunately, Nastya came pretty late, so that all pupils had already stood in the queue, i.e. Nastya took the last place in the queue... |
Solve the programming task below in a Python markdown code block.
The only difference between easy and hard versions is constraints.
If you write a solution in Python, then prefer to send it in PyPy to speed up execution time.
A session has begun at Beland State University. Many students are taking exams.
Polygraph... |
Solve the programming task below in a Python markdown code block.
On a certain meeting of a ruling party "A" minister Pavel suggested to improve the sewer system and to create a new pipe in the city.
The city is an n × m rectangular squared field. Each square of the field is either empty (then the pipe can go in it),... |
Solve the programming task below in a Python markdown code block.
Consider a rooted tree. A rooted tree has one special vertex called the root. All edges are directed from the root. Vertex u is called a child of vertex v and vertex v is called a parent of vertex u if there exists a directed edge from v to u. A vertex ... |
Solve the programming task below in a Python markdown code block.
The array a with n integers is given. Let's call the sequence of one or more consecutive elements in a segment. Also let's call the segment k-good if it contains no more than k different values.
Find any longest k-good segment.
As the input/output can... |
Solve the programming task below in a Python markdown code block.
Alice likes snow a lot! Unfortunately, this year's winter is already over, and she can't expect to have any more of it. Bob has thus bought her a gift — a large snow maker. He plans to make some amount of snow every day. On day i he will make a pile of ... |
Solve the programming task below in a Python markdown code block.
Vasya has a sequence of cubes and exactly one integer is written on each cube. Vasya exhibited all his cubes in a row. So the sequence of numbers written on the cubes in the order from the left to the right equals to a_1, a_2, ..., a_{n}.
While Vasya w... |
Solve the programming task below in a Python markdown code block.
A permutation of length $n$ 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.
Ivan is a novice painter. He has $n$ dyes of different colors. He also knows exactly $m$ pairs of colors which harmonize with each other.
Ivan also enjoy playing chess. He has $5000$ rooks. He wants to take $k$ rooks, paint each of them in one of $n$ c... |
Solve the programming task below in a Python markdown code block.
You are given an array of $n$ integers $a_1$, $a_2$, ..., $a_n$, and a set $b$ of $k$ distinct integers from $1$ to $n$.
In one operation, you may choose two integers $i$ and $x$ ($1 \le i \le n$, $x$ can be any integer) and assign $a_i := x$. This ope... |
Solve the programming task below in a Python markdown code block.
You've been in love with Coronavirus-chan for a long time, but you didn't know where she lived until now. And just now you found out that she lives in a faraway place called Naha.
You immediately decided to take a vacation and visit Coronavirus-chan. ... |
Solve the programming task below in a Python markdown code block.
Naman has two binary strings $s$ and $t$ of length $n$ (a binary string is a string which only consists of the characters "0" and "1"). He wants to convert $s$ into $t$ using the following operation as few times as possible.
In one operation, he can ch... |
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.
The academic year has just begun, but lessons and olympiads have already occupied all the free time. It is not a surprise that today Olga fell asleep on the Literature. She had a dream in which she was on a stairs.
The stairs consists of n steps. The ... |
Solve the programming task below in a Python markdown code block.
Seryozha has a very changeable character. This time he refused to leave the room to Dima and his girlfriend (her hame is Inna, by the way). However, the two lovebirds can always find a way to communicate. Today they are writing text messages to each oth... |
Solve the programming task below in a Python markdown code block.
A social network for dogs called DH (DogHouse) has k special servers to recompress uploaded videos of cute cats. After each video is uploaded, it should be recompressed on one (any) of the servers, and only after that it can be saved in the social netwo... |
Solve the programming task below in a Python markdown code block.
You have to restore the wall. The wall consists of $N$ pillars of bricks, the height of the $i$-th pillar is initially equal to $h_{i}$, the height is measured in number of bricks. After the restoration all the $N$ pillars should have equal heights.
Yo... |
Solve the programming task below in a Python markdown code block.
Petya and Gena love playing table tennis. A single match is played according to the following rules: a match consists of multiple sets, each set consists of multiple serves. Each serve is won by one of the players, this player scores one point. As soon ... |
Solve the programming task below in a Python markdown code block.
Vasily the bear has got a sequence of positive integers a_1, a_2, ..., a_{n}. Vasily the Bear wants to write out several numbers on a piece of paper so that the beauty of the numbers he wrote out was maximum.
The beauty of the written out numbers b_1,... |
Solve the programming task below in a Python markdown code block.
Nadeko's birthday is approaching! As she decorated the room for the party, a long garland of Dianthus-shaped paper pieces was placed on a prominent part of the wall. Brother Koyomi will like it!
Still unsatisfied with the garland, Nadeko decided to pol... |
Solve the programming task below in a Python markdown code block.
Hiking club "Up the hill" just returned from a walk. Now they are trying to remember which hills they've just walked through.
It is known that there were N stops, all on different integer heights between 1 and N kilometers (inclusive) above the sea lev... |
Solve the programming task below in a Python markdown code block.
Vasya is reading a e-book. The file of the book consists of $n$ pages, numbered from $1$ to $n$. The screen is currently displaying the contents of page $x$, and Vasya wants to read the page $y$. There are two buttons on the book which allow Vasya to sc... |
Solve the programming task below in a Python markdown code block.
Gathering darkness shrouds the woods and the world. The moon sheds its light on the boat and the river.
"To curtain off the moonlight should be hardly possible; the shades present its mellow beauty and restful nature." Intonates Mino.
"See? The clouds... |
Solve the programming task below in a Python markdown code block.
A flower shop has got n bouquets, and the i-th bouquet consists of a_{i} flowers. Vasya, the manager of the shop, decided to make large bouquets from these bouquets.
Vasya thinks that a bouquet is large if it is made of two or more initial bouquets, a... |
Solve the programming task below in a Python markdown code block.
The famous joke programming language HQ9+ has only 4 commands. In this problem we will explore its subset — a language called HQ...
-----Input-----
The only line of the input is a string between 1 and 10^6 characters long.
-----Output-----
Output ... |
Solve the programming task below in a Python markdown code block.
An army of n droids is lined up in one row. Each droid is described by m integers a_1, a_2, ..., a_{m}, where a_{i} is the number of details of the i-th type in this droid's mechanism. R2-D2 wants to destroy the sequence of consecutive droids of maximum... |
Solve the programming task below in a Python markdown code block.
Ancient Egyptians are known to have understood difficult concepts in mathematics. The ancient Egyptian mathematician Ahmes liked to write a kind of arithmetic expressions on papyrus paper which he called as Ahmes arithmetic expression.
An Ahmes arithme... |
Solve the programming task below in a Python markdown code block.
One day, Yuhao came across a problem about checking if some bracket sequences are correct bracket sequences.
A bracket sequence is any non-empty sequence of opening and closing parentheses. A bracket sequence is called a correct bracket sequence if it'... |
Solve the programming task below in a Python markdown code block.
There are two popular keyboard layouts in Berland, they differ only in letters positions. All the other keys are the same. In Berland they use alphabet with 26 letters which coincides with English alphabet.
You are given two strings consisting of 26 di... |
Solve the programming task below in a Python markdown code block.
Eugeny has array a = a_1, a_2, ..., a_{n}, consisting of n integers. Each integer a_{i} equals to -1, or to 1. Also, he has m queries: Query number i is given as a pair of integers l_{i}, r_{i} (1 ≤ l_{i} ≤ r_{i} ≤ n). The response to the query will b... |
Solve the programming task below in a Python markdown code block.
В самолёте есть n рядов мест. Если смотреть на ряды сверху, то в каждом ряду есть 3 места слева, затем проход между рядами, затем 4 центральных места, затем ещё один проход между рядами, а затем ещё 3 места справа.
Известно, что некоторые места уже зан... |
Solve the programming task below in a Python markdown code block.
The Greatest Secret Ever consists of n words, indexed by positive integers from 1 to n. The secret needs dividing between k Keepers (let's index them by positive integers from 1 to k), the i-th Keeper gets a non-empty set of words with numbers from the ... |
Solve the programming task below in a Python markdown code block.
It's been almost a week since Polycarp couldn't get rid of insomnia. And as you may already know, one week in Berland lasts k days!
When Polycarp went to a doctor with his problem, the doctor asked him about his sleeping schedule (more specifically, th... |
Solve the programming task below in a Python markdown code block.
There are n piles of pebbles on the table, the i-th pile contains a_{i} pebbles. Your task is to paint each pebble using one of the k given colors so that for each color c and any two piles i and j the difference between the number of pebbles of color c... |
Solve the programming task below in a Python markdown code block.
Vasya became interested in bioinformatics. He's going to write an article about similar cyclic DNA sequences, so he invented a new method for determining the similarity of cyclic sequences.
Let's assume that strings s and t have the same length n, then... |
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.
The Fair Nut found a string $s$. The string consists of lowercase Latin letters. The Nut is a curious guy, so he wants to find the number of strictly increasing sequences $p_1, p_2, \ldots, p_k$, such that: For each $i$ ($1 \leq i \leq k$), $s_{p_i} =... |
Solve the programming task below in a Python markdown code block.
Takahashi has two integers X and Y.
He computed X + Y and X - Y, and the results were A and B, respectively.
Now he cannot remember what X and Y were. Find X and Y for him.
-----Constraints-----
- -100 \leq A, B \leq 100
- For the given integers A an... |
Solve the programming task below in a Python markdown code block.
There are two 100-story buildings, called A and B. (In this problem, the ground floor is called the first floor.)
For each i = 1,\dots, 100, the i-th floor of A and that of B are connected by a corridor.
Also, for each i = 1,\dots, 99, there is a corrid... |
Solve the programming task below in a Python markdown code block.
Arkady's morning seemed to be straight of his nightmare. He overslept through the whole morning and, still half-asleep, got into the tram that arrived the first. Some time after, leaving the tram, he realized that he was not sure about the line number o... |
Solve the programming task below in a Python markdown code block.
You will receive 5 points for solving this problem.
Manao has invented a new operation on strings that is called folding. Each fold happens between a pair of consecutive letters and places the second part of the string above first part, running in the ... |
Solve the programming task below in a Python markdown code block.
Thanks to the Doctor's help, the rebels managed to steal enough gold to launch a full-scale attack on the Empire! However, Darth Vader is looking for revenge and wants to take back his gold.
The rebels have hidden the gold in various bases throughout t... |
Solve the programming task below in a Python markdown code block.
You are given a rooted tree on $n$ vertices, its root is the vertex number $1$. The $i$-th vertex contains a number $w_i$. Split it into the minimum possible number of vertical paths in such a way that each path contains no more than $L$ vertices and th... |
Solve the programming task below in a Python markdown code block.
Vasya commutes by train every day. There are n train stations in the city, and at the i-th station it's possible to buy only tickets to stations from i + 1 to a_{i} inclusive. No tickets are sold at the last station.
Let ρ_{i}, j be the minimum number ... |
Solve the programming task below in a Python markdown code block.
As you could know there are no male planes nor female planes. However, each plane on Earth likes some other plane. There are n planes on Earth, numbered from 1 to n, and the plane with number i likes the plane with number f_{i}, where 1 ≤ f_{i} ≤ n and ... |
Solve the programming task below in a Python markdown code block.
The classic programming language of Bitland is Bit++. This language is so peculiar and complicated.
The language is that peculiar as it has exactly one variable, called x. Also, there are two operations:
Operation ++ increases the value of variable ... |
Solve the programming task below in a Python markdown code block.
The construction of subway in Bertown is almost finished! The President of Berland will visit this city soon to look at the new subway himself.
There are n stations in the subway. It was built according to the Bertown Transport Law:
For each station... |
Solve the programming task below in a Python markdown code block.
One tradition of ACM-ICPC contests is that a team gets a balloon for every solved problem. We assume that the submission time doesn't matter and teams are sorted only by the number of balloons they have. It means that one's place is equal to the number ... |
Solve the programming task below in a Python markdown code block.
Each month Blake gets the report containing main economic indicators of the company "Blake Technologies". There are n commodities produced by the company. For each of them there is exactly one integer in the final report, that denotes corresponding reve... |
Solve the programming task below in a Python markdown code block.
Little Dima has two sequences of points with integer coordinates: sequence (a_1, 1), (a_2, 2), ..., (a_{n}, n) and sequence (b_1, 1), (b_2, 2), ..., (b_{n}, n).
Now Dima wants to count the number of distinct sequences of points of length 2·n that can b... |
Solve the programming task below in a Python markdown code block.
The Physical education teacher at SESC is a sort of mathematician too. His most favorite topic in mathematics is progressions. That is why the teacher wants the students lined up in non-decreasing height form an arithmetic progression.
To achieve the g... |
Solve the programming task below in a Python markdown code block.
Shaass has decided to hunt some birds. There are n horizontal electricity wires aligned parallel to each other. Wires are numbered 1 to n from top to bottom. On each wire there are some oskols sitting next to each other. Oskol is the name of a delicious... |
Solve the programming task below in a Python markdown code block.
Think of New York as a rectangular grid consisting of N vertical avenues numerated from 1 to N and M horizontal streets numerated 1 to M. C friends are staying at C hotels located at some street-avenue crossings. They are going to celebrate birthday of ... |
Solve the programming task below in a Python markdown code block.
Let's denote correct match equation (we will denote it as CME) an equation $a + b = c$ there all integers $a$, $b$ and $c$ are greater than zero.
For example, equations $2 + 2 = 4$ (||+||=||||) and $1 + 2 = 3$ (|+||=|||) are CME but equations $1 + 2 = ... |
Solve the programming task below in a Python markdown code block.
You are given $n$ intervals in form $[l; r]$ on a number line.
You are also given $m$ queries in form $[x; y]$. What is the minimal number of intervals you have to take so that every point (not necessarily integer) from $x$ to $y$ is covered by at leas... |
Solve the programming task below in a Python markdown code block.
Once Max found an electronic calculator from his grandfather Dovlet's chest. He noticed that the numbers were written with seven-segment indicators (https://en.wikipedia.org/wiki/Seven-segment_display). [Image]
Max starts to type all the values from a... |
Solve the programming task below in a Python markdown code block.
Luba has to do n chores today. i-th chore takes a_{i} units of time to complete. It is guaranteed that for every $i \in [ 2 . . n ]$ the condition a_{i} ≥ a_{i} - 1 is met, so the sequence is sorted.
Also Luba can work really hard on some chores. She c... |
Solve the programming task below in a Python markdown code block.
New Year is coming, and Jaehyun decided to read many books during 2015, unlike this year. He has n books numbered by integers from 1 to n. The weight of the i-th (1 ≤ i ≤ n) book is w_{i}.
As Jaehyun's house is not large enough to have a bookshelf, he ... |
Solve the programming task below in a Python markdown code block.
IT City company developing computer games invented a new way to reward its employees. After a new game release users start buying it actively, and the company tracks the number of sales with precision to each transaction. Every time when the next number... |
Solve the programming task below in a Python markdown code block.
Ksusha the Squirrel is standing at the beginning of a straight road, divided into n sectors. The sectors are numbered 1 to n, from left to right. Initially, Ksusha stands in sector 1.
Ksusha wants to walk to the end of the road, that is, get to sector... |
Solve the programming task below in a Python markdown code block.
In the year of $30XX$ participants of some world programming championship live in a single large hotel. The hotel has $n$ floors. Each floor has $m$ sections with a single corridor connecting all of them. The sections are enumerated from $1$ to $m$ alon... |
Solve the programming task below in a Python markdown code block.
This problem is same as the previous one, but has larger constraints.
Shiro's just moved to the new house. She wants to invite all friends of her to the house so they can play monopoly. However, her house is too small, so she can only invite one friend... |
Solve the programming task below in a Python markdown code block.
HDD hard drives group data by sectors. All files are split to fragments and each of them are written in some sector of hard drive. Note the fragments can be written in sectors in arbitrary order.
One of the problems of HDD hard drives is the following:... |
Solve the programming task below in a Python markdown code block.
Dima got into number sequences. Now he's got sequence a_1, a_2, ..., a_{n}, consisting of n positive integers. Also, Dima has got a function f(x), which can be defined with the following recurrence: f(0) = 0; f(2·x) = f(x); f(2·x + 1) = f(x) + 1.
D... |
Solve the programming task below in a Python markdown code block.
You have a list of numbers from $1$ to $n$ written from left to right on the blackboard.
You perform an algorithm consisting of several steps (steps are $1$-indexed). On the $i$-th step you wipe the $i$-th number (considering only remaining numbers). Y... |
Solve the programming task below in a Python markdown code block.
You are given an array $a_1, a_2, \dots , a_n$, which is sorted in non-decreasing order ($a_i \le a_{i + 1})$.
Find three indices $i$, $j$, $k$ such that $1 \le i < j < k \le n$ and it is impossible to construct a non-degenerate triangle (a triangle w... |
Solve the programming task below in a Python markdown code block.
Alice is a beginner composer and now she is ready to create another masterpiece. And not even the single one but two at the same time!
Alice has a sheet with n notes written on it. She wants to take two such non-empty non-intersecting subsequences tha... |
Solve the programming task below in a Python markdown code block.
In the rush of modern life, people often forget how beautiful the world is. The time to enjoy those around them is so little that some even stand in queues to several rooms at the same time in the clinic, running from one queue to another.
(Cultural no... |
Solve the programming task below in a Python markdown code block.
A film festival is coming up in the city N. The festival will last for exactly n days and each day will have a premiere of exactly one film. Each film has a genre — an integer from 1 to k.
On the i-th day the festival will show a movie of genre a_{i}. ... |
Solve the programming task below in a Python markdown code block.
A and B are preparing themselves for programming contests.
B loves to debug his code. But before he runs the solution and starts debugging, he has to first compile the code.
Initially, the compiler displayed n compilation errors, each of them is repre... |
Solve the programming task below in a Python markdown code block.
Ivan had string s consisting of small English letters. However, his friend Julia decided to make fun of him and hid the string s. Ivan preferred making a new string to finding the old one.
Ivan knows some information about the string s. Namely, he rem... |
Solve the programming task below in a Python markdown code block.
Вася купил стол, у которого n ножек. Каждая ножка состоит из двух частей, которые соединяются друг с другом. Каждая часть может быть произвольной положительной длины, но гарантируется, что из всех 2n частей возможно составить n ножек одинаковой длины. П... |
Solve the programming task below in a Python markdown code block.
Maria participates in a bicycle race.
The speedway takes place on the shores of Lake Lucerne, just repeating its contour. As you know, the lake shore consists only of straight sections, directed to the north, south, east or west.
Let's introduce a sys... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.