Category: Beginner


Find the Kth Smallest/Largest Element in an Array

Objective: Given an array of integers. find the Kth Smallest/largest element in the array. Example: int[] A = { 1, 2, 10, 20, 40, 32, 44, 51, 6 }; K=4. 4th smallest element in...


Dynamic Programming – Stairs Climbing Puzzle

Objective: A child is climbing up a staircase with n steps, and can hop either 1 step, 2 steps, or 3 steps at a time. Implement a method to count how many possible ways...


Find a Number occurring odd number of times in a Given array

Objective: Given a array of integers, in which every elements occurs even number of times except one number which occurs add number of times. Find out that number. Example:   int[] A = {...


Find a Missing Number From a Sequence of Consecutive Numbers | XOR Method

Input:  Array, arrA[] with a miss­ing num­ber and Range Out­put : miss­ing number Example: int A[] = { 1, 2, 7, 6, 3, 4 }; int range = 7; Output: MIssing No is :5 In...

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