#include "bits/stdc++.h"
using namespace std;
#define mod 1000000007
#define dom 998244353
#define all(c) begin(c),end(c)
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define rrep(i,a,b) for(int i=(b)-1;i>=(a);i--)
template <typename T> bool chmax(T &a, const T &b) { if (a < b) { a = b; return true; } return false; }
template <typename T> bool chmin(T &a, const T &b) { if (b < a) { a = b; return true; } return false; }
#define long long long
#define List vector
#define var auto
#define Count size()
#define Length size()
int dd[] = { 0, 1, 0, -1, 0 }; //→↓←↑

void solve()
{
	long N, M;
	cin >> N >> M;
	if (M <= N)
	{
		cout << 0 << endl;
		return;
	}
	long ans = 1;
	for (int i = 1; i <= N; i++)
	{
		ans = ans * i % M;
	}
	cout << ans << endl;
}

int main()
{
	cin.tie(0);
	ios::sync_with_stdio(false);
	solve();
	return 0;
}