Hackerrank
Two strings are anagrams of each other if the letters of one string can be rearranged to form the other string. Given a string, find the number of pairs of substrings of the string that are anagrams of each other. For example , the list of all anagrammatic pairs is at
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A left rotation operation on an array shifts each of the array's elements unit to the left. For example, if left rotations are performed on array , then the array would become . Given an array of integers and a number, , perform left rotations on the array. Return the updated
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You are given an unordered array consisting of consecutive integers [1, 2, 3, ..., n] without any duplicates. You are allowed to swap any two elements. You need to find the minimum number of swaps required to sort the array in ascending order. For example, given the array we perform the
Hackerrank
Comparators are used to compare two objects. In this challenge, you'll create a comparator and use it to sort an array. The Player class is provided in the editor below. It has two fields: 1. : a string. 2. : an integer. Given an array of Player objects, write a
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You are given an array and you need to find number of triplets of indices such that the elements at those indices are in geometric progression for a given common ratio and . For example, . If , we have and at indices and . Function Description Complete the countTriplets function in the editor
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There are groups of friends, and each group is numbered from 1 to . The th group contains people. They live near a bus stop, and only a single bus operates on this route. An empty bus arrives at the bus stop and all the groups want to travel by the
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Jim enters a candy shop which has N different types of candies, each candy is of the same price. Jim has enough money to buy K candies. In how many different ways can he purchase K candies if there are infinite candies of each kind? Input Format The first line
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On the eve of Diwali, Hari is decorating his house with a serial light bulb set. The serial light bulb set has N bulbs placed sequentially on a string which is programmed to change patterns every second. If at least one bulb in the set is on at any given
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You are given an integer, . Write a program to determine if is an element of the Fibonacci sequence. The first few elements of the Fibonacci sequence are . A Fibonacci sequence is one where every element is a sum of the previous two elements in the sequence. The first two elements
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You are given an integer N. Can you find the least positive integer X made up of only 9's and 0's, such that, X is a multiple of N? Update X is made up of one or more occurences of 9 and zero or more occurences
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Kristen loves playing with and comparing numbers. She thinks that if she takes two different positive numbers, the one whose digits sum to a larger number is better than the other. If the sum of digits is equal for both numbers, then she thinks the smaller number is better. For
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Akash and Akhil are playing a game. They have balls numbered from to . Akhil asks Akash to reverse the position of the balls, i.e., to change the order from say, 0,1,2,3 to 3,2,1,0. He further asks Akash to reverse the position of the