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