#include <cstdio>
#include <cstdlib>
#include <cstddef>
#include <vector>
#include <algorithm>
#include <cmath>
#include <string>
#include <iostream>
#include <iomanip>

int main(void)
{
	long n, m;
	std::cin >> n >> m;
    long ret = 1;
    for(long i = 1; i <= n; i++){
        ret = (ret * i) % m;
    }
    std::cout << ret << std::endl;
	return 0;
}