#include <bits/stdc++.h>

using namespace std;

typedef long long int64;

const int64 mod = 1000000000000LL;

int main()
{
  int N;
  cin >> N;

  __int128 fact = 1;
  for(int i = 1; i <= min(100, N); i++) {
    fact *= i;
    fact %= mod;
  }

  if(N >= 15) {
    printf("%012lld\n", (int64) fact);
  } else {
    printf("%lld\n", (int64) fact);
  }
}