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Kaavi, the mysterious fortune teller, deeply believes that one's fate is inevitable and unavoidable. Of course, she makes her living by predicting others' future. While doing divination, Kaavi believes that magic spells can provide great power for her t... |
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You have n dices each one having s sides numbered from 1 to s.
How many outcomes add up to a specified number k?
For example if we roll four normal six-sided dices we
have four outcomes that add up to 5.
(1, 1, 1, 2)
(1, 1, 2, 1)
(1, 2, 1, 1)
(2, 1, ... |
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# Right in the Center
_This is inspired by one of Nick Parlante's exercises on the [CodingBat](https://codingbat.com/java) online code practice tool._
Given a sequence of characters, does `"abc"` appear in the CENTER of the sequence?
The sequence of ... |
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Two chess pieces, a rook and a knight, stand on a standard chessboard 8 × 8 in size. The positions in which they are situated are known. It is guaranteed that none of them beats the other one.
Your task is to find the number of ways to place another kn... |
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Example
Input
1
Output
)(
Read the inputs from stdin solve the problem and write the answer to stdout (do not directly test on the sample inputs). Enclose your code within ```python delimiters. |
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And where the are the phone numbers?
You are given a string s consisting of lowercase English letters and an integer k. Find the lexicographically smallest string t of length k, such that its set of letters is a subset of the set of letters of s and s ... |
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You have given an array $a$ of length $n$ and an integer $x$ to a brand new robot. What the robot does is the following: it iterates over the elements of the array, let the current element be $q$. If $q$ is divisible by $x$, the robot adds $x$ copies of... |
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Ikshu's love for binary numbers
Ikshu recently learnt to generate random numbers. He is generating stream binary numbers. Uptil now he has generated N bits of the binary number. Now, he wants to know if there is a streak of contiguous 1's of length K.
... |
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Write a program which performs the following operations to a binary search tree $T$ by adding delete operation to B: Binary Search Tree II.
* insert $k$: Insert a node containing $k$ as key into $T$.
* find $k$: Report whether $T$ has a node containin... |
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At the school where Vasya is studying, preparations are underway for the graduation ceremony. One of the planned performances is a ball, which will be attended by pairs of boys and girls.
Each class must present two couples to the ball. In Vasya's clas... |
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You are given an array $a$ consisting of $n$ integers.
In one move, you can choose two indices $1 \le i, j \le n$ such that $i \ne j$ and set $a_i := a_j$. You can perform such moves any number of times (possibly, zero). You can choose different indice... |
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Niwango-kun, an employee of Dwango Co., Ltd., likes Niconico TV-chan, so he collected a lot of soft toys of her and spread them on the floor.
Niwango-kun has N black rare soft toys of Niconico TV-chan and they are spread together with ordinary ones. He... |
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Complete the function, which calculates how much you need to tip based on the total amount of the bill and the service.
You need to consider the following ratings:
- Terrible: tip 0%
- Poor: tip 5%
- Good: tip 10%
- Great: tip 15%
- Excellent: tip 20... |
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Let's introduce the designation <image>, where x is a string, n is a positive integer and operation " + " is the string concatenation operation. For example, [abc, 2] = abcabc.
We'll say that string s can be obtained from string t, if we can remove som... |
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Let a and b be some non-negative integers. Let's define strange addition of a and b as following:
1. write down the numbers one under another and align them by their least significant digit;
2. add them up digit by digit and concatenate the respec... |
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Given are three integers A_1, A_2, and A_3.
If A_1+A_2+A_3 is greater than or equal to 22, print bust; otherwise, print win.
-----Constraints-----
- 1 \leq A_i \leq 13 \ \ (i=1,2,3)
- All values in input are integers.
-----Input-----
Input is given ... |
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You are given N points in the xy-plane. You have a circle of radius one and move it on the xy-plane, so as to enclose as many of the points as possible. Find how many points can be simultaneously enclosed at the maximum. A point is considered enclosed b... |
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The process of mammoth's genome decoding in Berland comes to its end!
One of the few remaining tasks is to restore unrecognized nucleotides in a found chain s. Each nucleotide is coded with a capital letter of English alphabet: 'A', 'C', 'G' or 'T'. Un... |
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Compare two strings by comparing the sum of their values (ASCII character code).
* For comparing treat all letters as UpperCase
* `null/NULL/Nil/None` should be treated as empty strings
* If the string contains other characters than letters, treat the ... |
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We consider a positive integer perfect, if and only if the sum of its digits is exactly $10$. Given a positive integer $k$, your task is to find the $k$-th smallest perfect positive integer.
-----Input-----
A single line with a positive integer $k$ (... |
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Pasha decided to invite his friends to a tea party. For that occasion, he has a large teapot with the capacity of w milliliters and 2n tea cups, each cup is for one of Pasha's friends. The i-th cup can hold at most a_{i} milliliters of water.
It turned... |
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Convenience store Deven Eleven is planning to open its first store in Aizuwakamatsu City to expand its business. There are already many other convenience stores in Aizuwakamatsu, so the place to open a new store is likely to be the key to success. Under... |
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You play a computer game. In this game, you lead a party of $m$ heroes, and you have to clear a dungeon with $n$ monsters. Each monster is characterized by its power $a_i$. Each hero is characterized by his power $p_i$ and endurance $s_i$.
The heroes c... |
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In this problem MEX of a certain array is the smallest positive integer not contained in this array.
Everyone knows this definition, including Lesha. But Lesha loves MEX, so he comes up with a new problem involving MEX every day, including today.
You ... |
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As a New Year's gift, Dolphin received a string s of length 19.
The string s has the following format: `[five lowercase English letters],[seven lowercase English letters],[five lowercase English letters]`.
Dolphin wants to convert the comma-separated st... |
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Seiji Maki doesn't only like to observe relationships being unfolded, he also likes to observe sequences of numbers, especially permutations. Today, he has his eyes on almost sorted permutations.
A permutation $a_1, a_2, \dots, a_n$ of $1, 2, \dots, n$... |
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Vanya is managed to enter his favourite site Codehorses. Vanya uses n distinct passwords for sites at all, however he can't remember which one exactly he specified during Codehorses registration.
Vanya will enter passwords in order of non-decreasing th... |
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In Berland a bus travels along the main street of the capital. The street begins from the main square and looks like a very long segment. There are n bus stops located along the street, the i-th of them is located at the distance a_{i} from the central ... |
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This week Arkady wanted to cook some pancakes (to follow ancient traditions) and make a problem about that. But then he remembered that one can't make a problem about stacking pancakes without working at a specific IT company, so he decided to bake the ... |
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Ms. Iyo Kiffa-Australis has a balance and only two kinds of weights to measure a dose of medicine.
For example, to measure 200mg of aspirin using 300mg weights and 700mg weights, she can put one 700mg weight on the side of the medicine and three 300mg ... |
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There are n TV shows you want to watch. Suppose the whole time is split into equal parts called "minutes". The i-th of the shows is going from l_i-th to r_i-th minute, both ends inclusive.
You need a TV to watch a TV show and you can't watch two TV sho... |
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Print the K-th element of the following sequence of length 32:
1, 1, 1, 2, 1, 2, 1, 5, 2, 2, 1, 5, 1, 2, 1, 14, 1, 5, 1, 5, 2, 2, 1, 15, 2, 2, 5, 4, 1, 4, 1, 51
Constraints
* 1 \leq K \leq 32
* All values in input are integers.
Input
Input is give... |
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In the spring of 2014, a student successfully passed the university and started living alone. The problem here is what to do with the supper. He decided to plan a supper for the next N days.
He wants to maximize the total happiness he gets in N days. O... |
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The name of one small but proud corporation consists of n lowercase English letters. The Corporation has decided to try rebranding — an active marketing strategy, that includes a set of measures to change either the brand (both for the company and the g... |
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Victor and Peter are playing hide-and-seek. Peter has hidden, and Victor is to find him. In the room where they are playing, there is only one non-transparent wall and one double-sided mirror. Victor and Peter are points with coordinates (xv, yv) and (x... |
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Limak is a little bear who loves to play. Today he is playing by destroying block towers. He built n towers in a row. The i-th tower is made of hi identical blocks. For clarification see picture for the first sample.
Limak will repeat the following ope... |
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OK, my warriors! Now that you beat the big BOSS, you can unlock three new skills. (Does it sound like we're playing an RPG? ;-)
## The Arrow Function (JS only)
The first skill is the arrow function. Let's look at some examples to see how it works:
``... |
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Given a string $s$ of length $n$ and integer $k$ ($1 \le k \le n$). The string $s$ has a level $x$, if $x$ is largest non-negative integer, such that it's possible to find in $s$: $x$ non-intersecting (non-overlapping) substrings of length $k$, all ch... |
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You are the planning manager of an animation production company. What animation production companies produce these days is not limited to animation itself. Related products, such as figures of characters and character song CDs, are also important source... |
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Ryouko is an extremely forgetful girl, she could even forget something that has just happened. So in order to remember, she takes a notebook with her, called Ryouko's Memory Note. She writes what she sees and what she hears on the notebook, and the note... |
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Vasya the programmer lives in the middle of the Programming subway branch. He has two girlfriends: Dasha and Masha, who live at the different ends of the branch, each one is unaware of the other one's existence.
When Vasya has some free time, he goes t... |
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The flag of Berland is such rectangular field n × m that satisfies following conditions:
Flag consists of three colors which correspond to letters 'R', 'G' and 'B'. Flag consists of three equal in width and height stripes, parralel to each other and... |
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Let's consider equation:x^2 + s(x)·x - n = 0,
where x, n are positive integers, s(x) is the function, equal to the sum of digits of number x in the decimal number system.
You are given an integer n, find the smallest positive integer root of equatio... |
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There are N boxes arranged in a circle. The i-th box contains A_i stones.
Determine whether it is possible to remove all the stones from the boxes by repeatedly performing the following operation:
* Select one box. Let the box be the i-th box. Then, f... |
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The $\text{$gcdSum$}$ of a positive integer is the $gcd$ of that integer with its sum of digits. Formally, $\text{$gcdSum$}(x) = gcd(x, \text{ sum of digits of } x)$ for a positive integer $x$. $gcd(a, b)$ denotes the greatest common divisor of $a$ and ... |
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As shown in the following figure, there is a paper consisting of a grid structure where each cell is indicated by (x, y) coordinate system.
We are going to put drops of ink on the paper. A drop comes in three different sizes: Large, Medium, and Small. ... |
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Mr. A wants to get to the destination on the Yamanote line.
After getting on the train, Mr. A gets up for a minute and sleeps for b minutes repeatedly. It is c minutes after boarding to the destination, and you can get off if you are awake at this time... |
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Dreamoon likes to play with sets, integers and <image>. <image> is defined as the largest positive integer that divides both a and b.
Let S be a set of exactly four distinct integers greater than 0. Define S to be of rank k if and only if for all pairs... |
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Vasya's telephone contains n photos. Photo number 1 is currently opened on the phone. It is allowed to move left and right to the adjacent photo by swiping finger over the screen. If you swipe left from the first photo, you reach photo n. Similarly, by ... |
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You are given a weighted undirected graph. The vertices are enumerated from 1 to n. Your task is to find the shortest path between the vertex 1 and the vertex n.
Input
The first line contains two integers n and m (2 ≤ n ≤ 105, 0 ≤ m ≤ 105), where n is... |
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A set of four prime numbers arranged like (a, a + 2, a + 6, a + 8) is called a quadruplet prime number. Of the four prime numbers that make up a quadruplet prime, the largest number is called the size of the quadruplet prime. For example, the smallest p... |
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Given a list of unique words. Find all pairs of distinct indices (i, j) in the given list so that the concatenation of the two words, i.e. words[i] + words[j] is a palindrome.
Examples:
Non-string inputs should be converted to strings.
Return an arra... |
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Let $n$ be a positive integer. Let $a, b, c$ be nonnegative integers such that $a + b + c = n$.
Alice and Bob are gonna play rock-paper-scissors $n$ times. Alice knows the sequences of hands that Bob will play. However, Alice has to play rock $a$ times... |
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If I give you a date, can you tell me what day that date is? For example, december 8th, 2015 is a tuesday.
Your job is to write the function ```day(d)```
which takes a string representation of a date as input, in the format YYYYMMDD. The example would ... |
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Snuke loves "paper cutting": he cuts out characters from a newspaper headline and rearranges them to form another string.
He will receive a headline which contains one of the strings S_1,...,S_n tomorrow.
He is excited and already thinking of what strin... |
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You are the gym teacher in the school.
There are $n$ students in the row. And there are two rivalling students among them. The first one is in position $a$, the second in position $b$. Positions are numbered from $1$ to $n$ from left to right.
Since t... |
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Make the 2D list by the sequential integers started by the ```head``` number.
See the example test cases for the expected output.
```
Note:
-10**20 < the head number <10**20
1 <= the number of rows <= 1000
0 <= the number of columms <= 1000
```
W... |
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Professor Abacus has just built a new computing engine for making numerical tables. It was designed to calculate the values of a polynomial function in one variable at several points at a time. With the polynomial function f(x) = x2 + 2x + 1, for instan... |
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With your birthday coming up soon, your eccentric friend sent you a message to say "happy birthday":
hhhappyyyy biirrrrrthddaaaayyyyyyy to youuuu
hhapppyyyy biirtttthdaaay too youuu
happy birrrthdayy to youuu
happpyyyy birrtthdaaay tooo... |
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Xenia is a girl being born a noble. Due to the inflexibility and harshness of her family, Xenia has to find some ways to amuse herself.
<image>
Recently Xenia has bought n_r red gems, n_g green gems and n_b blue gems. Each of the gems has a weight.
N... |
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N people are waiting in a single line in front of the Takahashi Store. The cash on hand of the i-th person from the front of the line is a positive integer A_i.
Mr. Takahashi, the shop owner, has decided on the following scheme: He picks a product, set... |
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Your program fails again. This time it gets "Wrong answer on test 233"
.
This is the easier version of the problem. In this version 1 ≤ n ≤ 2000. You can hack this problem only if you solve and lock both problems.
The problem is about a test containi... |
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Amugae has a sentence consisting of $n$ words. He want to compress this sentence into one word. Amugae doesn't like repetitions, so when he merges two words into one word, he removes the longest prefix of the second word that coincides with a suffix of ... |
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There are n incoming messages for Vasya. The i-th message is going to be received after t_{i} minutes. Each message has a cost, which equals to A initially. After being received, the cost of a message decreases by B each minute (it can become negative).... |
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There is a plan view consisting of 12 vertical and 12 horizontal squares showing the terrain. Each square is painted white or black. White represents the sea and black represents the land. When two black squares touch each other vertically or horizontal... |
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Flatland is inhabited by pixels of three colors: red, green and blue. We know that if two pixels of different colors meet in a violent fight, only one of them survives the fight (that is, the total number of pixels decreases by one). Besides, if pixels ... |
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Masa Kita, who entered the University of Tokyo, joined a circle called TSG (University of Tokyo Super Gamers).
This circle exhibits games at the Komaba Festival every year, and Masa Kita decided to create and display the games as well.
The game create... |
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> [Run-length encoding](https://en.wikipedia.org/w/index.php?title=Run-length_encoding) (RLE) is a very simple form of data compression in which runs of data (that is, sequences in which the same data value occurs in many consecutive data elements) are ... |
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Consider the following game:
* The game is played using a row of N squares and many stones.
* First, a_i stones are put in Square i\ (1 \leq i \leq N).
* A player can perform the following operation as many time as desired: "Select an integer i such th... |
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**This Kata is intended as a small challenge for my students**
All Star Code Challenge #29
Your friend Nhoj has dislexia, but can easily read messages if the words are written backwards.
Create a function called `reverseSentence()/reverse_sentence()... |
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Ask a small girl - "How old are you?". She always says strange things... Lets help her!
For correct answer program should return int from 0 to 9.
Assume test input string always valid and may look like
"1 year old" or "5 years old", etc.. The first ... |
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Amr loves Chemistry, and specially doing experiments. He is preparing for a new interesting experiment.
Amr has n different types of chemicals. Each chemical i has an initial volume of a_{i} liters. For this experiment, Amr has to mix all the chemicals... |
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Given is an integer N.
Takahashi chooses an integer a from the positive integers not greater than N with equal probability.
Find the probability that a is odd.
-----Constraints-----
- 1 \leq N \leq 100
-----Input-----
Input is given from Standard Inp... |
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We have N integers. The i-th number is A_i.
\{A_i\} is said to be pairwise coprime when GCD(A_i,A_j)=1 holds for every pair (i, j) such that 1\leq i < j \leq N.
\{A_i\} is said to be setwise coprime when \{A_i\} is not pairwise coprime but GCD(A_1,\ldot... |
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Let's define the sum of two permutations p and q of numbers 0, 1, ..., (n - 1) as permutation [Image], where Perm(x) is the x-th lexicographically permutation of numbers 0, 1, ..., (n - 1) (counting from zero), and Ord(p) is the number of permutation p ... |
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Polycarp loves geometric progressions very much. Since he was only three years old, he loves only the progressions of length three. He also has a favorite integer k and a sequence a, consisting of n integers.
He wants to know how many subsequences of l... |
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Alice and Bob are fighting over who is a superior debater. However they wish to decide this in a dignified manner.
So they decide to fight in the Battle of Words.
In each game both get to speak a sentence. Because this is a dignified battle, they do ... |
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On the great island of Baltia, there live N people, numbered from 1 to N. There are exactly M pairs of people that are friends with each other. The people of Baltia want to organize a successful party, but they have very strict rules on what a party is ... |
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You might have heard about the next game in Lara Croft series coming out this year. You also might have watched its trailer. Though you definitely missed the main idea about its plot, so let me lift the veil of secrecy.
Lara is going to explore yet ano... |
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Tyndex is again well ahead of the rivals! The reaction to the release of Zoozle Chrome browser was the release of a new browser Tyndex.Brome!
The popularity of the new browser is growing daily. And the secret is not even the Tyndex.Bar installed (the T... |
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Return a new array consisting of elements which are multiple of their own index in input array (length > 1).
Some cases:
```
[22, -6, 32, 82, 9, 25] => [-6, 32, 25]
[68, -1, 1, -7, 10, 10] => [-1, 10]
[-56,-85,72,-26,-14,76,-27,72,35,-21,-67,87,0,... |
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You are given three integers n, k, m and m conditions (l_1, r_1, x_1), (l_2, r_2, x_2), ..., (l_m, r_m, x_m).
Calculate the number of distinct arrays a, consisting of n integers such that:
* 0 ≤ a_i < 2^k for each 1 ≤ i ≤ n;
* bitwise AND of num... |
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Petya was late for the lesson too. The teacher gave him an additional task. For some array a Petya should find the number of different ways to select non-empty subset of elements from it in such a way that their product is equal to a square of some inte... |
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Let's call a number k-good if it contains all digits not exceeding k (0, ..., k). You've got a number k and an array a containing n numbers. Find out how many k-good numbers are in a (count each number every time it occurs in array a).
-----Input-----... |
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In case you might be unlucky enough not to know the best dark fantasy franchise ever, Berserk tells the story of a man that, hating gratuitous violence, decided to become a mercenary (thus one who sells violence, no gratuity anymore!) and starts an epic... |
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It's tricky keeping track of who is owed what when spending money in a group. Write a function to balance the books.
* The function should take one parameter: an object/dict with two or more name-value pairs which represent the members of the group and... |
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Zhinü was a child of the Emperor, but he was weaving the machine even if he opened it at the request of his father.
It was a pleasure of the Emperor to wear clothes made of a splendid cloth called Unnishiki woven by Zhinü. Unnishiki has a short lifespa... |
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Given an array of arguments, representing system call arguments keys and values, join it into a single, space-delimited string. You don't need to care about the application name -- your task is only about parameters.
Each element of the given array can... |
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Ataru Oafoot of Aizu Gakuen University High School decided to play with a slot machine.
When you insert a medal on this machine, three reels will start spinning and each reel will stop automatically. In a normal game (normal game), 3 medals are inserte... |
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Create a function that takes a string as a parameter and does the following, in this order:
1. replaces every letter with the letter following it in the alphabet (see note below)
2. makes any vowels capital
3. makes any consonants lower case
**Note:**... |
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Santa Claus has n candies, he dreams to give them as gifts to children.
What is the maximal number of children for whose he can give candies if Santa Claus want each kid should get distinct positive integer number of candies. Santa Class wants to give ... |
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After battling Shikamaru, Tayuya decided that her flute is too predictable, and replaced it with a guitar. The guitar has $6$ strings and an infinite number of frets numbered from $1$. Fretting the fret number $j$ on the $i$-th string produces the note ... |
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You are given an array $a_1, a_2, \dots , a_n$ and two integers $m$ and $k$.
You can choose some subarray $a_l, a_{l+1}, \dots, a_{r-1}, a_r$.
The cost of subarray $a_l, a_{l+1}, \dots, a_{r-1}, a_r$ is equal to $\sum\limits_{i=l}^{r} a_i - k \lceil ... |
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You've got an n × m matrix. The matrix consists of integers. In one move, you can apply a single transformation to the matrix: choose an arbitrary element of the matrix and increase it by 1. Each element can be increased an arbitrary number of times.
Y... |
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Vasya is developing his own programming language VPL (Vasya Programming Language). Right now he is busy making the system of exceptions. He thinks that the system of exceptions must function like that.
The exceptions are processed by try-catch-blocks. ... |
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Problem
There are $ M $ type characters. Use them to create a string of length $ N $. How many strings are used that have $ K $ or more? Find too much divided by $ 998244353 $.
Here, the difference between two strings of length $ N $ is defined as fol... |
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# Task
Given an array of roots of a polynomial equation, you should reconstruct this equation.
___
## Output details:
* If the power equals `1`, omit it: `x = 0` instead of `x^1 = 0`
* If the power equals `0`, omit the `x`: `x - 2 = 0` instead of `x... |
Solve the programming task below in a Python markdown code block.
The Rebel fleet is on the run. It consists of m ships currently gathered around a single planet. Just a few seconds ago, the vastly more powerful Empire fleet has appeared in the same solar system, and the Rebels will need to escape into hyperspace. In ... |
Solve the programming task below in a Python markdown code block.
Taro is an elementary school student who has just learned multiplication. Somehow, he likes multiplication, so when he sees numbers, he wants to multiply. He seems to like to do the following for integers greater than or equal to 0. (Processing flow)
*... |
Solve the programming task below in a Python markdown code block.
You are given a string S consisting of lowercase English letters. Another string T is initially empty. Determine whether it is possible to obtain S = T by performing the following operation an arbitrary number of times:
* Append one of the following at... |
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