#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;
    if(m <= n){
        std::cout << "0" << std::endl;
    } else {
        for(long i = 1; i <= n; i++){
            ret = (ret * i) % m;
        }
        std::cout << ret << std::endl;
    }
	return 0;
}