#include <bits/stdc++.h>
using namespace std;

long long gcd(long long x, long long y)
{
    if (y == 0)
        return x;
    return gcd(y, x % y);
}

long long lcm(long long x, long long y)
{
    if (x == 0 || y == 0)
        return 0;
    return x / gcd(x, y) * y;
}

int main()
{
    long mod = 10000000000000;
    int N;
    cin >> N;
    if (N >= 50)
        cout << "000000000000" << endl;
    else
    {
        long x = 1;
        for (long i = 2; i <= N; i++)
        {
            x = (x * i) % mod;
        }
        string ans = to_string(x);
        if (ans.size() <= 12)
            cout << ans << endl;
        else
            cout << ans.substr(1, ans.size() - 1) << endl;
    }
}