// Code goes herefunction countNegative (M, n, m) {  count = 0;  i = 0;  j = m - 1;    while (j >=0 && i < n) {    if (M[i][j] < 0) {      count += (j+1)      i += 1;    } else {      j -= 1;    }  }    return count;}const M = [  [-3,-2,-1,1],  [-2,2,3,4],  [,4,5,7,8]]console.log(countNegative(M, M.length, M[0].length)) // 4