m = 65;
n = 65;
available = [13, 30, 29, 15, 11, 21, 21, 19, 24, 24, 25, 15, 17, 22, 18, 31, 11, 15, 16, 19, 28, 28, 16, 25, 9, 18, 19, 10, 21, 18, 19, 37, 14, 21, 12, 24, 13, 11, 20, 12, 19, 24, 13, 23, 19, 19, 11, 24, 13, 16, 18, 13, 24, 25, 13, 13, 25, 19, 18, 24, 20, 22, 27, 17, 17];
value = [23, 22, 12, 12, 24, 21, 29, 27, 18, 29, 31, 23, 17, 20, 17, 21, 18, 16, 28, 16, 22, 14, 16, 16, 23, 13, 17, 31, 26, 22, 5, 25, 22, 16, 22, 14, 13, 21, 26, 18, 23, 24, 17, 18, 20, 26, 12, 26, 32, 17, 21, 14, 21, 12, 23, 20, 16, 25, 25, 17, 17, 26, 24, 20, 19];
npref = [7, 1, 6, 2, 6, 3, 6, 2, 2, 2, 2, 5, 5, 3, 7, 4, 6, 1, 2, 2, 4, 3, 2, 1, 2, 5, 3, 7, 7, 2, 4, 4, 5, 4, 3, 4, 7, 5, 7, 2, 7, 6, 5, 3, 3, 4, 1, 6, 4, 7, 1, 5, 7, 6, 7, 7, 5, 3, 3, 2, 1, 4, 4, 5, 6];
good_pref = [47, 61, 9, 37, 54, 17, 51, 37, 17, 10, 28, 49, 54, 62, 13, 31, 37, 49, 34, 59, 35, 36, 40, 55, 2, 4, 48, 9, 22, 4, 11, 50, 17, 64, 48, 62, 42, 7, 45, 5, 39, 57, 34, 29, 48, 54, 58, 60, 3, 15, 60, 13, 17, 27, 7, 58, 27, 9, 44, 44, 29, 48, 20, 23, 41, 61, 1, 61, 50, 43, 45, 22, 63, 61, 63, 63, 8, 26, 17, 6, 45, 37, 53, 47, 41, 53, 40, 17, 54, 57, 52, 8, 54, 43, 50, 54, 22, 52, 29, 21, 4, 14, 21, 35, 40, 23, 53, 7, 44, 24, 25, 13, 20, 24, 45, 18, 61, 26, 15, 26, 53, 36, 10, 9, 21, 55, 29, 51, 36, 51, 42, 10, 15, 50, 64, 31, 32, 7, 30, 53, 30, 63, 34, 35, 42, 48, 39, 44, 31, 63, 26, 41, 30, 10, 39, 34, 32, 56, 20, 18, 52, 5, 21, 35, 44, 46, 18, 64, 56, 32, 7, 46, 21, 63, 59, 55, 60, 3, 53, 63, 26, 52, 26, 26, 34, 51, 65, 34, 36, 10, 55, 40, 38, 34, 12, 32, 15, 51, 9, 11, 25, 62, 52, 11, 33, 62, 33, 6, 37, 41, 8, 39, 15, 39, 23, 23, 57, 9, 41, 54, 27, 21, 26, 36, 65, 61, 27, 43, 35, 45, 11, 43, 4, 60, 48, 3, 63, 47, 7, 23, 54, 62, 2, 25, 8, 34, 5, 13, 61, 65, 5, 23, 47, 29, 58, 47, 25, 13, 11, 60, 23, 32, 32, 38, 36, 51, 56];
req_pref = [8, 5, 6, 8, 5, 6, 8, 10, 7, 6, 7, 5, 6, 8, 6, 6, 9, 6, 5, 8, 5, 7, 6, 5, 7, 9, 6, 4, 7, 5, 3, 5, 6, 6, 8, 6, 9, 3, 6, 7, 4, 7, 7, 3, 9, 8, 7, 7, 4, 8, 6, 11, 4, 4, 8, 5, 7, 7, 8, 10, 5, 9, 6, 9, 9, 7, 8, 6, 9, 7, 7, 6, 1, 11, 5, 6, 8, 6, 7, 5, 5, 6, 8, 6, 5, 4, 5, 6, 8, 5, 6, 10, 5, 7, 6, 4, 8, 10, 6, 7, 8, 5, 9, 8, 6, 10, 6, 3, 6, 7, 4, 5, 7, 6, 10, 4, 5, 6, 7, 6, 6, 9, 6, 5, 4, 9, 11, 5, 6, 7, 7, 5, 6, 8, 6, 7, 10, 5, 5, 6, 5, 6, 4, 3, 8, 6, 9, 6, 4, 5, 4, 4, 10, 3, 7, 5, 6, 6, 8, 7, 8, 8, 9, 7, 8, 5, 6, 7, 5, 6, 9, 7, 9, 4, 7, 6, 9, 7, 7, 6, 6, 6, 6, 6, 5, 10, 5, 3, 5, 4, 8, 6, 8, 8, 4, 5, 8, 6, 7, 6, 7, 6, 8, 7, 13, 1, 5, 8, 6, 5, 5, 6, 7, 4, 9, 7, 6, 10, 6, 3, 3, 5, 6, 8, 7, 6, 5, 6, 4, 5, 8, 5, 8, 9, 6, 6, 6, 7, 10, 7, 9, 8, 7, 5, 4, 3, 5, 5, 4, 8, 7, 8, 5, 3, 11, 2, 8, 8, 4, 7, 6, 10, 9, 8, 7, 9, 6];