Xor Matrix

Let's consider a square matrix of size N × N, where N = R −­­­­­­­­­­­ L + 1. We will enumerate the columns of this matrix with consecutive integers from L to R (the leftmost column will be assigned number L and the rightmost - number R). In similar manner we will enumerate rows with the same integers (the top row will be assigned number L and the bottom row - number R). Every cell of this matri