#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("Yes");}else{puts("No");}
#define MAX_N 200005

int main() {
    ll n;
    cin >> n;

    if(n >= 50){
        rep(i,12){
            cout << '0';
            
        }
        cout << endl;
        return 0;
    }

    ll ans = 1;
    srep(i,1,n+1){
        ans *= (ll)i;
        ans %= (ll)1e12;
    }
    if(n >= 15){
        cout << setfill('0') << right << setw(12) << ans;
    }else{
        cout << ans << endl;
    }
    
    return 0;
}