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

#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define repi(i,a,b) for(int i=int(a);i<(int)(b);i++)
#define all(x) (x).begin(),(x).end()
#define foreach(u,v) for(auto (u) : (v))
#define pb push_back
#define mp make_pair
#define mt make_tuple

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<ll, ll> pll;
typedef vector<ll> vl;

const int inf = 1e9;
const ll linf = 1e18;
const ll mod = 1e9 + 7;
const double eps = 1e-9;

int main()
{
  ll n;
  cin >> n;

  if(n >= 50){
    rep(i, 12) cout << 0;
    cout << endl;
  }else{
    ll s = 1;
    string ans;
    repi(i, 1, n+1){
      s *= i;
      ans = to_string(s);
      s %= (ll)(1e12);
    }
    if(ans.size() > 12){
      cout << ans.substr(ans.size()-12, 12) << endl;
    }else{
      cout << ans << endl;
    }
  }

  return 0;
}