You are given a 2D matrix grid of size m x n. In one operation, you can change the value of any cell to any non-negative number. Your task is to perform operations such that each cell is equal to the cell below it, and different from the cell to its right. Return the minimum number of operations needed to achieve these conditions.
You are given a 3x3 matrix consisting of characters ‘B’ (black) and ‘W’ (white). Your task is to determine if it is possible to change the color of at most one cell to form a 2x2 square where all cells are of the same color. Return true if it is possible, otherwise return false.