main(int argc, char **argv)
{
	int m, n;

	m = atoi(argv[1]);
	n = atoi(argv[2]);
	printf("%d\n", ack(m, n));
}

ack(int m, int n) {
	if (m == 0)
		return n+1;
	else if (n == 0)
		return ack(m-1, 1);
	else
		return ack(m-1, ack(m, n-1));
}