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Solve the programming task below in a Python markdown code block. The Cybermen and the Daleks have long been the Doctor's main enemies. Everyone knows that both these species enjoy destroying everything they encounter. However, a little-known fact about them is that they both also love taking Turing tests! Heidi desi...
Solve the programming task below in a Python markdown code block. Kurt reaches nirvana when he finds the product of all the digits of some positive integer. Greater value of the product makes the nirvana deeper. Help Kurt find the maximum possible product of digits among all integers from $1$ to $n$. -----Input----...
Solve the programming task below in a Python markdown code block. Awruk is taking part in elections in his school. It is the final round. He has only one opponent — Elodreip. The are $n$ students in the school. Each student has exactly $k$ votes and is obligated to use all of them. So Awruk knows that if a person give...
Solve the programming task below in a Python markdown code block. You are given a set of points on a straight line. Each point has a color assigned to it. For point a, its neighbors are the points which don't have any other points between them and a. Each point has at most two neighbors - one from the left and one fro...
Solve the programming task below in a Python markdown code block. After returning from the army Makes received a gift — an array a consisting of n positive integer numbers. He hadn't been solving problems for a long time, so he became interested to answer a particular question: how many triples of indices (i,  j,  k) ...
Solve the programming task below in a Python markdown code block. Katie, Kuro and Shiro are best friends. They have known each other since kindergarten. That's why they often share everything with each other and work together on some very hard problems. Today is Shiro's birthday. She really loves pizza so she wants t...
Solve the programming task below in a Python markdown code block. Ilya is a very clever lion, he lives in an unusual city ZooVille. In this city all the animals have their rights and obligations. Moreover, they even have their own bank accounts. The state of a bank account is an integer. The state of a bank account ca...
Solve the programming task below in a Python markdown code block. [Image] Walking through the streets of Marshmallow City, Slastyona have spotted some merchants selling a kind of useless toy which is very popular nowadays – caramel spinner! Wanting to join the craze, she has immediately bought the strange contraptio...
Solve the programming task below in a Python markdown code block. Little Chris knows there's no fun in playing dominoes, he thinks it's too random and doesn't require skill. Instead, he decided to play with the dominoes and make a "domino show". Chris arranges n dominoes in a line, placing each piece vertically uprig...
Solve the programming task below in a Python markdown code block. Pasha has a positive integer a without leading zeroes. Today he decided that the number is too small and he should make it larger. Unfortunately, the only operation Pasha can do is to swap two adjacent decimal digits of the integer. Help Pasha count th...
Solve the programming task below in a Python markdown code block. Ilya lives in a beautiful city of Chordalsk. There are $n$ houses on the street Ilya lives, they are numerated from $1$ to $n$ from left to right; the distance between every two neighboring houses is equal to $1$ unit. The neighboring houses are $1$ an...
Solve the programming task below in a Python markdown code block. Santa Claus is the first who came to the Christmas Olympiad, and he is going to be the first to take his place at a desk! In the classroom there are n lanes of m desks each, and there are two working places at each of the desks. The lanes are numbered f...
Solve the programming task below in a Python markdown code block. Catherine has a deck of n cards, each of which is either red, green, or blue. As long as there are at least two cards left, she can do one of two actions: take any two (not necessarily adjacent) cards with different colors and exchange them for a new ...
Solve the programming task below in a Python markdown code block. Dasha decided to have a rest after solving the problem. She had been ready to start her favourite activity — origami, but remembered the puzzle that she could not solve. [Image] The tree is a non-oriented connected graph without cycles. In particular...
Solve the programming task below in a Python markdown code block. Nazar, a student of the scientific lyceum of the Kingdom of Kremland, is known for his outstanding mathematical abilities. Today a math teacher gave him a very difficult task. Consider two infinite sets of numbers. The first set consists of odd positiv...
Solve the programming task below in a Python markdown code block. Arpa is taking a geometry exam. Here is the last problem of the exam. You are given three points a, b, c. Find a point and an angle such that if we rotate the page around the point by the angle, the new position of a is the same as the old position of...
Solve the programming task below in a Python markdown code block. 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...
Solve the programming task below in a Python markdown code block. Recently Max has got himself into popular CCG "BrainStone". As "BrainStone" is a pretty intellectual game, Max has to solve numerous hard problems during the gameplay. Here is one of them: Max owns n creatures, i-th of them can be described with two nu...
Solve the programming task below in a Python markdown code block. One day Vasya was sitting on a not so interesting Maths lesson and making an origami from a rectangular a mm × b mm sheet of paper (a > b). Usually the first step in making an origami is making a square piece of paper from the rectangular sheet by fol...
Solve the programming task below in a Python markdown code block. Sengoku still remembers the mysterious "colourful meteoroids" she discovered with Lala-chan when they were little. In particular, one of the nights impressed her deeply, giving her the illusion that all her fancies would be realized. On that night, Sen...
Solve the programming task below in a Python markdown code block. On one quiet day all of sudden Mister B decided to draw angle a on his field. Aliens have already visited his field and left many different geometric figures on it. One of the figures is regular convex n-gon (regular convex polygon with n sides). That'...
Solve the programming task below in a Python markdown code block. Petr has just bought a new car. He's just arrived at the most known Petersburg's petrol station to refuel it when he suddenly discovered that the petrol tank is secured with a combination lock! The lock has a scale of $360$ degrees and a pointer which i...
Solve the programming task below in a Python markdown code block. Polycarp decided to relax on his weekend and visited to the performance of famous ropewalkers: Agafon, Boniface and Konrad. The rope is straight and infinite in both directions. At the beginning of the performance, Agafon, Boniface and Konrad are locat...
Solve the programming task below in a Python markdown code block. Vasya is studying number theory. He has denoted a function f(a, b) such that: f(a, 0) = 0; f(a, b) = 1 + f(a, b - gcd(a, b)), where gcd(a, b) is the greatest common divisor of a and b. Vasya has two numbers x and y, and he wants to calculate f(x, y)...
Solve the programming task below in a Python markdown code block. There is a building with 2N floors, numbered 1, 2, \ldots, 2N from bottom to top. The elevator in this building moved from Floor 1 to Floor 2N just once. On the way, N persons got on and off the elevator. Each person i (1 \leq i \leq N) got on at Floor ...
Solve the programming task below in a Python markdown code block. Gerald is very particular to eight point sets. He thinks that any decent eight point set must consist of all pairwise intersections of three distinct integer vertical straight lines and three distinct integer horizontal straight lines, except for the av...
Solve the programming task below in a Python markdown code block. Adilbek was assigned to a special project. For Adilbek it means that he has $n$ days to run a special program and provide its results. But there is a problem: the program needs to run for $d$ days to calculate the results. Fortunately, Adilbek can opti...
Solve the programming task below in a Python markdown code block. Apart from Nian, there is a daemon named Sui, which terrifies children and causes them to become sick. Parents give their children money wrapped in red packets and put them under the pillow, so that when Sui tries to approach them, it will be driven awa...
Solve the programming task below in a Python markdown code block. Erelong Leha was bored by calculating of the greatest common divisor of two factorials. Therefore he decided to solve some crosswords. It's well known that it is a very interesting occupation though it can be very difficult from time to time. In the cou...
Solve the programming task below in a Python markdown code block. A tree is a connected undirected graph consisting of n vertices and n - 1 edges. Vertices are numbered 1 through n. Limak is a little polar bear and Radewoosh is his evil enemy. Limak once had a tree but Radewoosh stolen it. Bear is very sad now beca...
Solve the programming task below in a Python markdown code block. NN is an experienced internet user and that means he spends a lot of time on the social media. Once he found the following image on the Net, which asked him to compare the sizes of inner circles: [Image] It turned out that the circles are equal. NN wa...
Solve the programming task below in a Python markdown code block. Harry Potter and He-Who-Must-Not-Be-Named engaged in a fight to the death once again. This time they are located at opposite ends of the corridor of length l. Two opponents simultaneously charge a deadly spell in the enemy. We know that the impulse of H...
Solve the programming task below in a Python markdown code block. There is the faculty of Computer Science in Berland. In the social net "TheContact!" for each course of this faculty there is the special group whose name equals the year of university entrance of corresponding course of students at the university. Ea...
Solve the programming task below in a Python markdown code block. Overlooking the captivating blend of myriads of vernal hues, Arkady the painter lays out a long, long canvas. Arkady has a sufficiently large amount of paint of three colours: cyan, magenta, and yellow. On the one-dimensional canvas split into n consec...
Solve the programming task below in a Python markdown code block. Let $f_{x} = c^{2x-6} \cdot f_{x-1} \cdot f_{x-2} \cdot f_{x-3}$ for $x \ge 4$. You have given integers $n$, $f_{1}$, $f_{2}$, $f_{3}$, and $c$. Find $f_{n} \bmod (10^{9}+7)$. -----Input----- The only line contains five integers $n$, $f_{1}$, $f_{2}...
Solve the programming task below in a Python markdown code block. Returning back to problem solving, Gildong is now studying about palindromes. He learned that a palindrome is a string that is the same as its reverse. For example, strings "pop", "noon", "x", and "kkkkkk" are palindromes, while strings "moon", "tv", an...
Solve the programming task below in a Python markdown code block. Let's call a list of positive integers $a_0, a_1, ..., a_{n-1}$ a power sequence if there is a positive integer $c$, so that for every $0 \le i \le n-1$ then $a_i = c^i$. Given a list of $n$ positive integers $a_0, a_1, ..., a_{n-1}$, you are allowed t...
Solve the programming task below in a Python markdown code block. Lord Omkar has permitted you to enter the Holy Church of Omkar! To test your worthiness, Omkar gives you a password which you must interpret! A password is an array $a$ of $n$ positive integers. You apply the following operation to the array: pick any ...
Solve the programming task below in a Python markdown code block. Student Dima from Kremland has a matrix $a$ of size $n \times m$ filled with non-negative integers. He wants to select exactly one integer from each row of the matrix so that the bitwise exclusive OR of the selected integers is strictly greater than ze...
Solve the programming task below in a Python markdown code block. Given are two strings s and t consisting of lowercase English letters. Determine if there exists an integer i satisfying the following condition, and find the minimum such i if it exists. - Let s' be the concatenation of 10^{100} copies of s. t is a su...
Solve the programming task below in a Python markdown code block. Bear Limak examines a social network. Its main functionality is that two members can become friends (then they can talk with each other and share funny pictures). There are n members, numbered 1 through n. m pairs of members are friends. Of course, a m...
Solve the programming task below in a Python markdown code block. [Image] -----Input----- The first line of the input is a string (between 1 and 50 characters long, inclusive). Each character will be a letter of English alphabet, lowercase or uppercase. The second line of the input is an integer between 0 and 26,...
Solve the programming task below in a Python markdown code block. Yaroslav, Andrey and Roman can play cubes for hours and hours. But the game is for three, so when Roman doesn't show up, Yaroslav and Andrey play another game. Roman leaves a word for each of them. Each word consists of 2·n binary characters "0" or "1...
Solve the programming task below in a Python markdown code block. Anya and Kirill are doing a physics laboratory work. In one of the tasks they have to measure some value n times, and then compute the average value to lower the error. Kirill has already made his measurements, and has got the following integer values:...
Solve the programming task below in a Python markdown code block. Grigoriy, like the hero of one famous comedy film, found a job as a night security guard at the museum. At first night he received embosser and was to take stock of the whole exposition. Embosser is a special devise that allows to "print" the text of a...
Solve the programming task below in a Python markdown code block. The final match of the Berland Football Cup has been held recently. The referee has shown $n$ yellow cards throughout the match. At the beginning of the match there were $a_1$ players in the first team and $a_2$ players in the second team. The rules of...
Solve the programming task below in a Python markdown code block. During the break the schoolchildren, boys and girls, formed a queue of n people in the canteen. Initially the children stood in the order they entered the canteen. However, after a while the boys started feeling awkward for standing in front of the girl...
Solve the programming task below in a Python markdown code block. Makoto has a big blackboard with a positive integer $n$ written on it. He will perform the following action exactly $k$ times: Suppose the number currently written on the blackboard is $v$. He will randomly pick one of the divisors of $v$ (possibly $1$...
Solve the programming task below in a Python markdown code block. Now it's time of Olympiads. Vanya and Egor decided to make his own team to take part in a programming Olympiad. They've been best friends ever since primary school and hopefully, that can somehow help them in teamwork. For each team Olympiad, Vanya tak...
Solve the programming task below in a Python markdown code block. Let quasi-palindromic number be such number that adding some leading zeros (possible none) to it produces a palindromic string. String t is called a palindrome, if it reads the same from left to right and from right to left. For example, numbers 131 ...
Solve the programming task below in a Python markdown code block. Imp is in a magic forest, where xorangles grow (wut?) [Image] A xorangle of order n is such a non-degenerate triangle, that lengths of its sides are integers not exceeding n, and the xor-sum of the lengths is equal to zero. Imp has to count the numb...
Solve the programming task below in a Python markdown code block. You play a computer game. Your character stands on some level of a multilevel ice cave. In order to move on forward, you need to descend one level lower and the only way to do this is to fall through the ice. The level of the cave where you are is a re...
Solve the programming task below in a Python markdown code block. The programming competition season has already started and it's time to train for ICPC. Sereja coaches his teams for a number of year and he knows that to get ready for the training session it's not enough to prepare only problems and editorial. As the ...
Solve the programming task below in a Python markdown code block. You are given a string $s$ consisting of $n$ lowercase Latin letters. $n$ is even. For each position $i$ ($1 \le i \le n$) in string $s$ you are required to change the letter on this position either to the previous letter in alphabetic order or to the ...
Solve the programming task below in a Python markdown code block. Marina loves strings of the same length and Vasya loves when there is a third string, different from them in exactly t characters. Help Vasya find at least one such string. More formally, you are given two strings s_1, s_2 of length n and number t. Let...
Solve the programming task below in a Python markdown code block. It's hard times now. Today Petya needs to score 100 points on Informatics exam. The tasks seem easy to Petya, but he thinks he lacks time to finish them all, so he asks you to help with one.. There is a glob pattern in the statements (a string consisti...
Solve the programming task below in a Python markdown code block. 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...
Solve the programming task below in a Python markdown code block. When registering in a social network, users are allowed to create their own convenient login to make it easier to share contacts, print it on business cards, etc. Login is an arbitrary sequence of lower and uppercase latin letters, digits and underline...
Solve the programming task below in a Python markdown code block. Connect the countless points with lines, till we reach the faraway yonder. There are n points on a coordinate plane, the i-th of which being (i, y_{i}). Determine whether it's possible to draw two parallel and non-overlapping lines, such that every po...
Solve the programming task below in a Python markdown code block. Vasya had three strings $a$, $b$ and $s$, which consist of lowercase English letters. The lengths of strings $a$ and $b$ are equal to $n$, the length of the string $s$ is equal to $m$. Vasya decided to choose a substring of the string $a$, then choose...
Solve the programming task below in a Python markdown code block. During a New Year special offer the "Sudislavl Bars" offered n promo codes. Each promo code consists of exactly six digits and gives right to one free cocktail at the bar "Mosquito Shelter". Of course, all the promocodes differ. As the "Mosquito Shelte...
Solve the programming task below in a Python markdown code block. Little Alyona is celebrating Happy Birthday! Her mother has an array of n flowers. Each flower has some mood, the mood of i-th flower is a_{i}. The mood can be positive, zero or negative. Let's define a subarray as a segment of consecutive flowers. The...
Solve the programming task below in a Python markdown code block. Luke Skywalker gave Chewbacca an integer number x. Chewbacca isn't good at numbers but he loves inverting digits in them. Inverting digit t means replacing it with digit 9 - t. Help Chewbacca to transform the initial number x to the minimum possible p...
Solve the programming task below in a Python markdown code block. Programmer Rostislav got seriously interested in the Link/Cut Tree data structure, which is based on Splay trees. Specifically, he is now studying the expose procedure. Unfortunately, Rostislav is unable to understand the definition of this procedure, ...
Solve the programming task below in a Python markdown code block. Pig is visiting a friend. Pig's house is located at point 0, and his friend's house is located at point m on an axis. Pig can use teleports to move along the axis. To use a teleport, Pig should come to a certain point (where the teleport is located) ...
Solve the programming task below in a Python markdown code block. There are N blocks arranged in a row. Let us paint these blocks. We will consider two ways to paint the blocks different if and only if there is a block painted in different colors in those two ways. Find the number of ways to paint the blocks under the...
Solve the programming task below in a Python markdown code block. Given are a prime number p and a sequence of p integers a_0, \ldots, a_{p-1} consisting of zeros and ones. Find a polynomial of degree at most p-1, f(x) = b_{p-1} x^{p-1} + b_{p-2} x^{p-2} + \ldots + b_0, satisfying the following conditions: - For each...
Solve the programming task below in a Python markdown code block. Polycarp is a great fan of television. He wrote down all the TV programs he is interested in for today. His list contains n shows, i-th of them starts at moment l_{i} and ends at moment r_{i}. Polycarp owns two TVs. He can watch two different shows si...
Solve the programming task below in a Python markdown code block. Sereja showed an interesting game to his friends. The game goes like that. Initially, there is a table with an empty cup and n water mugs on it. Then all players take turns to move. During a move, a player takes a non-empty mug of water and pours all wa...
Solve the programming task below in a Python markdown code block. Alice and Bob are decorating a Christmas Tree. Alice wants only $3$ types of ornaments to be used on the Christmas Tree: yellow, blue and red. They have $y$ yellow ornaments, $b$ blue ornaments and $r$ red ornaments. In Bob's opinion, a Christmas Tre...
Solve the programming task below in a Python markdown code block. Kolya loves putting gnomes at the circle table and giving them coins, and Tanya loves studying triplets of gnomes, sitting in the vertexes of an equilateral triangle. More formally, there are 3n gnomes sitting in a circle. Each gnome can have from 1 to...
Solve the programming task below in a Python markdown code block. A wise man told Kerem "Different is good" once, so Kerem wants all things in his life to be different. Kerem recently got a string s consisting of lowercase English letters. Since Kerem likes it when things are different, he wants all substrings of hi...
Solve the programming task below in a Python markdown code block. At regular competition Vladik and Valera won a and b candies respectively. Vladik offered 1 his candy to Valera. After that Valera gave Vladik 2 his candies, so that no one thought that he was less generous. Vladik for same reason gave 3 candies to Vale...
Solve the programming task below in a Python markdown code block. Serval soon said goodbye to Japari kindergarten, and began his life in Japari Primary School. In his favorite math class, the teacher taught him the following interesting definitions. A parenthesis sequence is a string, containing only characters "(" ...
Solve the programming task below in a Python markdown code block. Limak is a little polar bear. He doesn't have many toys and thus he often plays with polynomials. He considers a polynomial valid if its degree is n and its coefficients are integers not exceeding k by the absolute value. More formally: Let a_0, a_1, ...
Solve the programming task below in a Python markdown code block. Developing tools for creation of locations maps for turn-based fights in a new game, Petya faced the following problem. A field map consists of hexagonal cells. Since locations sizes are going to be big, a game designer wants to have a tool for quick f...
Solve the programming task below in a Python markdown code block. Alice and Bob are playing chess on a huge chessboard with dimensions $n \times n$. Alice has a single piece left — a queen, located at $(a_x, a_y)$, while Bob has only the king standing at $(b_x, b_y)$. Alice thinks that as her queen is dominating the c...
Solve the programming task below in a Python markdown code block. Given an array $a$, consisting of $n$ integers, find: $$\max\limits_{1 \le i < j \le n} LCM(a_i,a_j),$$ where $LCM(x, y)$ is the smallest positive integer that is divisible by both $x$ and $y$. For example, $LCM(6, 8) = 24$, $LCM(4, 12) = 12$, $LCM(2,...
Solve the programming task below in a Python markdown code block. Barney is standing in a bar and starring at a pretty girl. He wants to shoot her with his heart arrow but he needs to know the distance between him and the girl to make his shot accurate. [Image] Barney asked the bar tender Carl about this distance va...
Solve the programming task below in a Python markdown code block. Berland has n cities, the capital is located in city s, and the historic home town of the President is in city t (s ≠ t). The cities are connected by one-way roads, the travel time for each of the road is a positive integer. Once a year the President v...
Solve the programming task below in a Python markdown code block. You are given an unweighted tree with n vertices. Then n - 1 following operations are applied to the tree. A single operation consists of the following steps: choose two leaves; add the length of the simple path between them to the answer; remove on...
Solve the programming task below in a Python markdown code block. VK news recommendation system daily selects interesting publications of one of $n$ disjoint categories for each user. Each publication belongs to exactly one category. For each category $i$ batch algorithm selects $a_i$ publications. The latest A/B tes...
Solve the programming task below in a Python markdown code block. This is an easier version of the problem. In this version, $n \le 500$. Vasya is an experienced developer of programming competitions' problems. As all great minds at some time, Vasya faced a creative crisis. To improve the situation, Petya gifted him ...
Solve the programming task below in a Python markdown code block. Modern text editors usually show some information regarding the document being edited. For example, the number of words, the number of pages, or the number of characters. In this problem you should implement the similar functionality. You are given a ...
Solve the programming task below in a Python markdown code block. You are given two arrays $a_1, a_2, \dots , a_n$ and $b_1, b_2, \dots , b_m$. Array $b$ is sorted in ascending order ($b_i < b_{i + 1}$ for each $i$ from $1$ to $m - 1$). You have to divide the array $a$ into $m$ consecutive subarrays so that, for each...
Solve the programming task below in a Python markdown code block. E869120 is initially standing at the origin (0, 0) in a two-dimensional plane. He has N engines, which can be used as follows: - When E869120 uses the i-th engine, his X- and Y-coordinate change by x_i and y_i, respectively. In other words, if E869120 ...
Solve the programming task below in a Python markdown code block. Ivan has an array consisting of n elements. Each of the elements is an integer from 1 to n. Recently Ivan learned about permutations and their lexicographical order. Now he wants to change (replace) minimum number of elements in his array in such a way...
Solve the programming task below in a Python markdown code block. Vasya is going to the Olympics in the city Ntown by train. The boy wants to read the textbook to prepare for the Olympics. He counted that he needed k hours for this. He also found that the light in the train changes every hour. The light is measured on...
Solve the programming task below in a Python markdown code block. The country of Byalechinsk is running elections involving n candidates. The country consists of m cities. We know how many people in each city voted for each candidate. The electoral system in the country is pretty unusual. At the first stage of electi...
Solve the programming task below in a Python markdown code block. Valera wanted to prepare a Codesecrof round. He's already got one problem and he wants to set a time limit (TL) on it. Valera has written n correct solutions. For each correct solution, he knows its running time (in seconds). Valera has also wrote m wr...
Solve the programming task below in a Python markdown code block. Calendars in widespread use today include the Gregorian calendar, which is the de facto international standard, and is used almost everywhere in the world for civil purposes. The Gregorian reform modified the Julian calendar's scheme of leap years as fo...
Solve the programming task below in a Python markdown code block. Ari the monster is not an ordinary monster. She is the hidden identity of Super M, the Byteforces’ superhero. Byteforces is a country that consists of n cities, connected by n - 1 bidirectional roads. Every road connects exactly two distinct cities, and...
Solve the programming task below in a Python markdown code block. It's well known that the best way to distract from something is to do one's favourite thing. Job is such a thing for Leha. So the hacker began to work hard in order to get rid of boredom. It means that Leha began to hack computers all over the world. F...
Solve the programming task below in a Python markdown code block. Two friends are on the coordinate axis Ox in points with integer coordinates. One of them is in the point x_1 = a, another one is in the point x_2 = b. Each of the friends can move by one along the line in any direction unlimited number of times. When...
Solve the programming task below in a Python markdown code block. You are playing one RPG from the 2010s. You are planning to raise your smithing skill, so you need as many resources as possible. So how to get resources? By stealing, of course. You decided to rob a town's blacksmith and you take a follower with you. ...
Solve the programming task below in a Python markdown code block. -----Input----- The input contains a single integer a (1 ≤ a ≤ 40). -----Output----- Output a single string. -----Examples----- Input 2 Output Adams Input 8 Output Van Buren Input 29 Output Harding Read the inputs from stdin solve the probl...
Solve the programming task below in a Python markdown code block. Fox Ciel has some flowers: r red flowers, g green flowers and b blue flowers. She wants to use these flowers to make several bouquets. There are 4 types of bouquets: To make a "red bouquet", it needs 3 red flowers. To make a "green bouquet", it need...
Solve the programming task below in a Python markdown code block. Fifa and Fafa are sharing a flat. Fifa loves video games and wants to download a new soccer game. Unfortunately, Fafa heavily uses the internet which consumes the quota. Fifa can access the internet through his Wi-Fi access point. This access point can ...
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. Родители Васи хотят, чтобы он как можно лучше учился. Поэтому если он получает подряд три положительные оценки («четвёрки» или «пятёрки»), они дарят ему подарок. Соответственно, оценки «единица», «двойка» и «тройка» родители Васи считают плохими. Когда ...