#include <algorithm> #include <iostream> #include <iomanip> #include <cstring> #include <string> #include <vector> #include <random> #include <bitset> #include <queue> #include <cmath> #include <stack> #include <set> #include <map> typedef long long ll; using namespace std; const ll MOD = 1000000007LL; int main() { cin.sync_with_stdio(false); cin.tie(0); cout.tie(0); ll n, m; cin >> n >> m; if (n >= m) { cout << 0 << "\n"; return 0; } ll ans = 1; for (ll i = 1; i <= n; i++) { ans = ans * i % m; } cout << ans << "\n"; return 0; }