#include "bits/stdc++.h"
using namespace std;
#ifdef _DEBUG
#include "dump.hpp"
#else
#define dump(...)
#endif

//#define int long long
#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--)
#define all(c) begin(c),end(c)
const int INF = sizeof(int) == sizeof(long long) ? 0x3f3f3f3f3f3f3f3fLL : 0x3f3f3f3f;
const int MOD = 1'000'000'007;
template<class T> bool chmax(T &a, const T &b) { if (a < b) { a = b; return true; } return false; }
template<class T> bool chmin(T &a, const T &b) { if (b < a) { a = b; return true; } return false; }

signed main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	//string problem = "ABCDEFGHIJKLMNOPQRSTUVWXZABCDEFGHIJKLMNPQRSTVWXYZ_BCDEFGHIJKLMNOPQSTUVWXYZABCDFGHIJKLMN OPQRSTUVWXYZ_ABCDEFHJKLMNOPQRSTUWXYZABCDFGHIJKLMOPQRSTUVWXYZ_ABCDEFGHIJKLMNOPQRSUVXYZAB CDEFGHIJKLMNPQRSTUVWXYZ_ABCDEFGHJKLMOPQRSUVWXYZABCDFHIJKLMNOPQRSTUVWXYZABCDFGHIJKLMNOPQ TUVWXYZ_ABCDEFGHIJKLMOPQRSTUVWXYZ_BCDEFGHIJKLMOPQRSTUVWXYZABCEFGHIJKLMNOPQRSTUVWXYZ_ABC DEFGHIJKLNOPQRSTUVWXYZ._ABCDEFGHIJKLMNOPQRSTUVWXZABCDEFGHIJKLMNPQRSTVWXYZABCDEFGHIJKLMN OPQSTUVWXYZ_ABCDEFGHIJKLMNOPQRSUVWXYZBCDEFGHIJKLMNOPQRTUVWXYZABCDEFGHIJLMNOPQRSTUVWXYZ_ ABCDEFGHJKLMNOPQRTUVWXYZ_ABCDEFGHIJKLMNOPQRSUVWXYZABCDEFGHIJKLMNPQRSTUVWXYZ_ABCDEGHJKLM OPQRSTUVWXYZABCEFGHIJKLMNOPQRSTUVWXYZ_ABCDEFGHIJKLMNOPQRSUVWXYZABCDEFGIJKLMNOPQRSTUVWXY ZABCDFGHIJKLMNOPQRSTUVWXYZ_ABCDEGHIJKLMNOPQRSTUVWXYZBDEFGHIJKLMNOPQRSUVWXYZABCDEFGHIJKL MNPQSTUVWXYZABCDEFGHJKLMNOPQRSTUVWXYZBCDEFGHIJKMNOPQRSTUVWXYZ_ABCDEFGHIJKLMNPQRSTUVWXYZ ABCDEGHIJKLMNOPQRSTUVWXYZ_ABCDEFGHIJKLMOPQRSTUVWXYZ,_ABCDEFGHIJKLNPQRSTUVWXYZABCEFGHIJK LMNOPQRSTVWXYZABCDEFGHIJKMNPQRSTUVWXYZ_ABCDEFGHIJKLNOPQRSTUVWXYZ.";
	//int x = 0;
	//for (auto c : problem) {
	//	if (isalpha(c)) {
	//		while (c - 'A' != x % 26) {
	//			cout << char(x % 26 + 'A');
	//			x++;
	//		}
	//		x++;
	//	}
	//	else {
	//		cout << c;
	//	}
	//}
	int N, M; cin >> N >> M;
	if (N >= M) {
		cout << 0 << endl;
	}
	else {
		int ans = 1;
		rep(i, 1, N + 1)
			(ans *= i) %= M;
		cout << ans << endl;
	}
	return 0;
}