After they became famous, the CodeBots all decided to move to a new building and live together. The building is represented by a rectangular matrix of rooms. Each cell in the matrix contains an integer that represents the price of the room. Some room…

Let's define digit degree of some positive integer as the number of times we need to replace this number with the sum of its digits until we get to a one digit number. Given an integer, find its digit degree. Example For n = 5, the output should bedi…

You found two items in a treasure chest! The first item weighs weight1 and is worth value1, and the second item weighs weight2 and is worth value2. What is the total maximum value of the items you can take with you, assuming that your max weight capa…

Each day a plant is growing by upSpeed meters. Each night that plant's height decreases by downSpeed meters due to the lack of sun heat. Initially, plant is 0 meters tall. We plant the seed at the beginning of a day. We want to know when the height o…

Given array of integers, find the maximal possible sum of some of its k consecutive elements. Example For inputArray = [2, 3, 5, 1, 6] and k = 2, the output should bearrayMaxConsecutiveSum(inputArray, k) = 8.All possible sums of 2 consecutive element…

Given a string, find the number of different characters in it. Example For s = "cabca", the output should bedifferentSymbolsNaive(s) = 3. There are 3 different characters a, b and c. 我的解答: def differentSymbolsNaive(s): return len(set(s)) 一模一样 膜拜…

Find the leftmost digit that occurs in a given string. Example For inputString = "var_1__Int", the output should befirstDigit(inputString) = '1'; For inputString = "q2q-q", the output should befirstDigit(inputString) = '2'; For inputSt…

Given array of integers, remove each kth element from it. Example For inputArray = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] and k = 3, the output should beextractEachKth(inputArray, k) = [1, 2, 4, 5, 7, 8, 10]. 我的解答: def extractEachKth(inputArray, k): return…

Given an array of equal-length strings, check if it is possible to rearrange the strings in such a way that after the rearrangement the strings at consecutive positions would differ by exactly one character. Example For inputArray = ["aba", &quo…

Given a sorted array of integers a, find an integer x from a such that the value of abs(a[0] - x) + abs(a[1] - x) + ... + abs(a[a.length - 1] - x) is the smallest possible (here abs denotes the absolute value).If there are several possible answers, o…

You have deposited a specific amount of money into your bank account. Each year your balance increases at the same growth rate. With the assumption that you don't make any additional deposits, find out how long it would take for your balance to pass…

Consider integer numbers from 0 to n - 1 written down along the circle in such a way that the distance between any two neighboring numbers is equal (note that 0 and n - 1are neighboring, too). Given n and firstNumber, find the number which is written…

Given two cells on the standard chess board, determine whether they have the same color or not. Example For cell1 = "A1" and cell2 = "C3", the output should bechessBoardCellColor(cell1, cell2) = true. For cell1 = "A1" and cel…

Given a string, replace each its character by the next one in the English alphabet (z would be replaced by a). Example For inputString = "crazy", the output should bealphabeticShift(inputString) = "dsbaz". 我的解答: def alphabeticShift(inp…

Correct variable names consist only of English letters, digits and underscores and they can't start with a digit. Check if the given string is a correct variable name. Example For name = "var_1__Int", the output should bevariableName(name) = tru…

Check if all digits of the given integer are even. Example For n = 248622, the output should beevenDigitsOnly(n) = true; For n = 642386, the output should beevenDigitsOnly(n) = false. 我的解答: def evenDigitsOnly(n): for i in range(len(str(n))): if int(s…

Given an array of integers, replace all the occurrences of elemToReplace with substitutionElem. Example For inputArray = [1, 2, 1], elemToReplace = 1, and substitutionElem = 3, the output should bearrayReplace(inputArray, elemToReplace, substitutionE…

In the popular Minesweeper game you have a board with some mines and those cells that don't contain a mine have a number in it that indicates the total number of mines in the neighboring cells. Starting off with some arrangement of mines we want to c…

A 1-interesting polygon is just a square with a side of length 1. An n-interesting polygon is obtained by taking the n - 1-interesting polygon and appending 1-interesting polygons to its rim, side by side. You can see the 1-, 2-, 3- and 4-interesting…

Given an array of integers, find the pair of adjacent elements that has the largest product and return that product. Example For inputArray = [3, 6, -2, -5, 7, 3], the output should beadjacentElementsProduct(inputArray) = 21. 7 and 3 produce the larg…

You have a string s that consists of English letters, punctuation marks, whitespace characters, and brackets. It is guaranteed that the parentheses in s form a regular bracket sequence. Your task is to reverse the strings contained in each pair of ma…

Some people are standing in a row in a park. There are trees between them which cannot be moved. Your task is to rearrange the people by their heights in a non-descending order without moving the trees. People can be very tall! Example For a = [-1, 1…

Ticket numbers usually consist of an even number of digits. A ticket number is considered lucky if the sum of the first half of the digits is equal to the sum of the second half. Given a ticket number n, determine if it's lucky or not. Example For n…

Given two strings, find the number of common characters between them. Example For s1 = "aabcc" and s2 = "adcaa", the output should becommonCharacterCount(s1, s2) = 3. Strings have 3 common characters - 2 "a"s and 1 "c&qu…

Given a sequence of integers as an array, determine whether it is possible to obtain a strictly increasing sequence by removing no more than one element from the array. Example For sequence = [1, 3, 2, 1], the output should bealmostIncreasingSequence…

Given an array of strings, return another array containing all of its longest strings. Example For inputArray = ["aba", "aa", "ad", "vcd", "aba"], the output should beallLongestStrings(inputArray) = ["…

Description Ratiorg got statues of different sizes as a present from CodeMaster for his birthday, each statue having an non-negative integer size. Since he likes to make things perfect, he wants to arrange them from smallest to largest so that each s…

Given a string, find out if its characters can be rearranged to form a palindrome. Example For inputString = "aabb", the output should bepalindromeRearranging(inputString) = true. We can rearrange "aabb" to make "abba", which…

You are given an array of integers. On each move you are allowed to increase exactly one of its element by one. Find the minimal number of moves required to obtain a strictly increasing sequence from the input. Example For inputArray = [1, 1, 1], the…

Two arrays are called similar if one can be obtained from another by swapping at most one pair of elements in one of the arrays. Given two arrays a and b, check whether they are similar. Example For a = [1, 2, 3] and b = [1, 2, 3], the output should…