Magic Squares In Grid - Leetcode 840 - Java

*Problem Description*
Program to calculate the sum of all xor totals for every subset of given array nums.
Program to count the number of `3 x 3` contiguous magic square subgrids in given a `row x col` `grid` of integers.
Problem: leetcode.com/p...
Code link: k5kc.com/cs/al...
Refer this video on 3X3 magic square mathematics - Why is there only 3X3 magic square - • Why is there only one ...