#include <iostream>
#include <algorithm>
#include <string>
#include <cmath>
#include <stack>
#include <vector>
#include <map>
#define REP(i,a) for(int i = 0; i < (a); i++)
using namespace std;

int main(){
	long long n,m;
	cin >> n >> m;
	long long res = 1;
    for(long long i = 1; i <= n; i++)res *= i;
	cout << res - res % m << endl;
}