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Hackerrank

A collection of 419 issues

Hackerrank - Common Child Solution

A string is said to be a child of a another string if it can be formed by deleting 0 or more characters from the other string. Given two strings of equal length, what's the longest string that can be constructed such that it is a child of

Hackerrank - Sparse Arrays Solution

There is a collection of input strings and a collection of query strings. For each query string, determine how many times it occurs in the list of input strings. For example, given input and , we find instances of ', of '' and of ''. For each query, we

Hackerrank - Gaming Array Solution

Andy wants to play a game with his little brother, Bob. The game starts with an array of distinct integers and the rules are as follows: * Bob always plays first and the two players move in alternating turns. * In a single move, a player chooses the maximum element currently present

Hackerrank - Validating and Parsing Email Addresses Solution

A valid email address meets the following criteria: * It's composed of a username, domain name, and extension assembled in this format: [email protected] * The username starts with an English alphabetical character, and any subsequent characters consist of one or more of the following: alphanumeric characters, -,., and

Hackerrank - Nikita and the Game Solution

Nikita just came up with a new array game. The rules are as follows: * Initially, Nikita has an array of integers. * In each move, Nikita must partition the array into non-empty contiguous parts such that the sum of the elements in the left partition is equal to the sum of

Hackerrank - Stock Maximize Solution

Your algorithms have become so good at predicting the market that you now know what the share price of Wooden Orange Toothpicks Inc. (WOT) will be for the next number of days. Each day, you can either buy one share of WOT, sell any number of shares of WOT that

Hackerrank - The Captain's Room Solution

Mr. Anant Asankhya is the manager at the INFINITE hotel. The hotel has an infinite amount of rooms. One fine day, a finite number of tourists come to stay at the hotel. The tourists consist of: → A Captain. → An unknown group of families consisting of members per group where ≠ . The

Hackerrank - Identify Smith Numbers Solution

A Smith number is a composite number, the sum of whose digits is the sum of the digits of its prime factors obtained as a result of prime factorization (excluding ). The first few such numbers are 4, 22, 27, 58, 85, 94 and 121 Example: 378 = 2 x 3 x

Hackerrank - Halloween party Solution

Alex is attending a Halloween party with his girlfriend, Silvia. At the party, Silvia spots the corner of an infinite chocolate bar (two dimensional, infinitely long in width and length). If the chocolate can be served only as 1 x 1 sized pieces and Alex can cut the chocolate bar

Hackerrank - The Full Counting Sort Solution

In this challenge you need to print the string that accompanies each integer in a list sorted by the integers. If two strings are associated with the same integer, they must be printed in their original order so your sorting algorithm should be stable. There is one other twist. The