TATA 1MG Hiring Off-Campus OA (2024) | Replace Element with Greatest Element on Right Side

Problem Statement Given an integer array arr, replace every element with the greatest element among the elements to its right, and replace the last element with -1. Return the modified array after performing the operation in-place. Example Input arr = [17,18,5,4,6,1] Output [18,6,6,6,1,-1] Explanation Index Original Value Greatest Element on Right 0 17 18 1 18 6 2 5 6 3 4 6 4 6 1 5 1 -1 Result: [18,6,6,6,1,-1] Constraints 1 <= arr.length <= 10^4 1 <= arr[i] ...