#include <bits/stdc++.h>
using namespace std;
#define FOR(i, n) for(int i = 0; i < (n); i++)
#define MEM(a, x) memset(a, x, sizeof(a))
#define ALL(a) a.begin(), a.end()
#define UNIQUE(a) a.erase(unique(ALL(a)), a.end())
typedef long long ll;

int n;
ll MOD = 1e12;
ll a[100];

int main(int argc, char const *argv[]) {
	ios_base::sync_with_stdio(false);
	cin >> n;
	string s;
	if (n >= 60) {
		FOR(i, 12) s += '0';
		cout << s << endl;
		return 0;
	}
	
	a[1] = 1;
	for (int i = 1; i < 60; i++) a[i+1] = a[i] * (i+1) % MOD;
	if (n >= 15 && to_string(a[n]).size() != 12) {
		FOR(i, 12-to_string(a[n]).size()) s += '0';
		s += to_string(a[n]);
	}
	else s = to_string(a[n]);
	cout << s << endl;
	return 0;
}