#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<vector>
#include<string>
#include<sstream>
#include<cmath>
#include<numeric>
#include<map>
#include<stack>
#include<queue>
using namespace std;


int main(void) {
  long long int n;
  cin >> n;
  long long int a = 1;
  if( n >= 60 ){
    cout << "000000000000" << endl;
    return 0;
  }
  for(int i=2; i<=n; i++){
    a *= i;
    a %= 1000000000000;
  }
  cout << a << endl;

  return 0;
}






// EOF