s = array1d(1..100, [6, 2, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 6, 5, 9, 0, 0, 0, 8, 4, 0, 0, 0, 0, 8, 7, 0, 9, 1, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 7, 0, 0, 4, 0, 0, 0, 0, 0, 1, 3, 8, 0, 0, 0, 4, 0, 0, 0, 0, 0, 7, 0, 6, 8, 0, 0, 8, 0, 0, 0, 0, 7, 0, 4, 0, 0, 0, 3, 0, 0, 0, 5, 8, 0, 0]);
n = 10;