#include<algorithm>
#include<complex>
#include<ctype.h>
#include<iomanip>
#include<iostream>
#include<fstream>
#include<map>
#include<math.h>
#include<numeric>
#include<queue>
#include<set>
#include<stack>
#include<stdio.h>
#include<string>
#include<string>
#include<vector>

using namespace std;
typedef long long ll;

#define FOR(i,a,b) for(ll i=(a);i<(b);++i)
#define ALL(v) (v).begin(), (v).end()
#define p(s) cout<<(s)<<endl
#define p2(s, t) cout << (s) << " " << (t) << endl
#define br() p("")
#define pn(s) cout << (#s) << " " << (s) << endl
#define p_yes() p("Yes")
#define p_no() p("No")

const ll mod = 1e9 + 7;
const ll inf = 1e18;

template < typename T >
void vprint(T &V){
	for(auto v : V){
    	cout << v << " ";
	}
	cout << endl;
}

ll factorial(ll n){
    ll ans = 1;
    FOR(i, 1, n+1){
        ans *= i;
        ans %= 1000000000000;
    }
    return ans;
}

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

    // input
    ll N;
    cin >> N;

    if(N>=50){
        p("000000000000");
        return 0;
    }

    if(N<=14){
        p(factorial(N));
        return 0;
    }

    ll ans = factorial(N);
    string s = to_string(ans);
    stringstream ss;
    ll zero_num = 12 - s.size();
    FOR(i, 0, zero_num){
        ss << '0';
    }
    ss << s;

    p(ss.str());
    
    return 0;
}