convert an 2d array from rows to blocks

Question

I am trying to work in this code for weeks. I need to convert rows and columns in a 2d array to blocks. it should work on any matrix in size n*n. (that I have been given the siz

Answer 1

No Need to perform a complex logic. Try to use :

public static int[][] blocks(int[][] matrix, int sqrtN) {   
    int[][] blocks = matrix;
    for (int i = 0; i < matrix.length; i++) {
        for (int j = 0; j < matrix.length; j++){ 
            blocks[i][j] = (i % sqrtN * sqrtN) + (j % sqrtN + 1) ;
    }
}
        return blocks;
}