class Solution {
    public int matrixScore(int[][] A) {
        int rows = A.length;
        int cols = A[0].length;

        int sum = 0;
        for (int r = 0; r < rows; r++) {
            int num = 0;
            int p = 1;
            for (int c = cols-1; c >= 0; c--) {
                if (A[r][c] ==1 ) num += p;
                p <<= 1;
            }

            sum += num;
        }
        return sum;
    }
}