Maximum Greyness in Satellite Image Grid Cells

amazon Several satellites provide observational black and white images that are stored in data centers at Amazon Web Services (AWS). These images are represented as a n * m grid of cells. Each pixel can have a value of 0 or 1, where 0 represents a black pixel and 1 represents a white pixel. The greyness of a cell (i, j) is defined as the difference between the number of black pixels in the i-th row and the j-th column and the number of white pixels in the i-th row and the j-th column. Find the maximum greyness among all the cells of the grid. Example: pixels = ["110", "001", "110"] The greyness of the cell (1, 1) is 2. Return the maximum achievable greyness value. Example Input 3 3 110 001 110