A number spiral is an infinite grid whose upper-left square has the number 1. Here are the first five layers of the spiral:Your task is to find out the number in row y and column x. Input The first input line contains an integer tt: the num... Read more
A permutation of integers 1,2,…,n1,2,…,n is called beautiful if there are no adjacent elements whose difference is 11. Given n, construct a beautiful permutation if such a permutation exists. Input The only input line co... Read more
You are given an array of n integers. You want to modify the array so that it is increasing, i.e., every element is at least as large as the previous element. On each move, you may increase the value of any element by one. What is the minimum nu... Read more
You are given a DNA sequence: a string consisting of characters A, C, G, and T. Your task is to find the longest repetition in the sequence. This is a maximum-length substring containing only one type of character. Input The only input line cont... Read more
You are given all numbers between 1,2,…,n1,2,…,n except one. Your task is to find the missing number. Input The first input line contains an integer n. The second line contains n−1n−1 numbers. Each number is distinct and between 11 and... Read more
Consider an algorithm that takes as input a positive integer n. If n is even, the algorithm divides it by two, and if nn is odd, the algorithm multiplies it by three and adds one. The algorithm repeats this until n is one. For example, the seque... Read more
Check if it possible to jump to last position of Array Given an array with positive integers as elements indicating the maximum length of a jump which can be made from any position in the array. Check if it is possible to have a jumps combinatio... Read more
Highest power of 2 less than or equal to a given number Problem Statement : You are given with a number you need to find the highest power of 2 either less than or equal to the given number. So, for this problem first we will se the iterative me... Read more
Java SHA-256 hackerrank Solution Cryptographic hash functions are mathematical operations run on digital data; by comparing the computed hash (i.e., the output produced by executing a hashing algorithm) to a known and expected hash val... Read more