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