Given an array ‘arr’ consisting of ‘N’ integer elements. You have to remove ‘K’ elements from the beginning or end of the array. Return the maximum possible sum of the remaining array eleme...

Given a N * N matrix and the task is to check matrix is idempotent matrix or not.

See the sample input.

Idempotent matrix M follows the following property :

You are given an array Arr consisting of n integers, you need to find a valid triplet as explained below.