#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
#define INF (1<<30)
#define INFLL (1ll<<60)
typedef pair<int, int> P;
typedef pair<int, P> E;
#define MOD (1000000007ll)
#define l_ength size

void mul_mod(ll& a, ll b){
	a *= b;
	a %= MOD;
}

void add_mod(ll& a, ll b){
	a += b;
	if(a>MOD){
		a -= MOD;
	}
}

int main(void){
	int n,m,i;
	ll ans=1ll;
	cin >> n >> m;
	if(n>m){
		cout << 0 << endl;
		return 0;
	}else{
		for(i=1; i<=n; ++i){
			ans *= i;
			ans %= m;
		}
	}
	cout << ans << endl;
	return 0;
}