Find One’s Complement of an Integer

The naïve approach to solve the problem would be to first convert the given number into its binary representation and then change every 1’s to 0 and 0’s to 1. After changing all 0’s and 1’s convert the binary representation to number.
Input  : n = 5
Output : 2

Input  : n = 255
Output : 0

Input  : n = 26
Output : 5

Find One’s Complement of an Integer : https://www.geeksforgeeks.org/find-ones-complement-integer/