#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); i ++)
using namespace std;
typedef long long ll;
typedef pair<ll,ll> PL;
typedef pair<int,int> P;
const int INF = 1e9;
const ll MOD = 1e12;
const double eps = 1e-6;

int main() {
    ll N; cin >> N;
    if (N <= 100){
        ll ans = 1;
        for (ll i = 1;i <= N;i++){
            ans = ans*i%MOD;
        }
        if (N >= 15) printf("%012ld\n",ans);
        else printf("%ld\n",ans);
    }
    else cout << "000000000000" << endl;
}