#include<bits/stdc++.h>

using namespace std;
using ll=long long;
#define rep2(i, a, n) for(int i = (a); i < (n); i++)
#define rep(i, n) rep2(i,0,n)

int main(){
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  ll n;cin>>n;
  if(n<=14){
    ll ans=1;
    rep2(i,2,n+1){
      ans*=i;
    }
    cout<<ans<<endl;
  }else if(n<50){
    const ll mod=1e12;
    ll ans=1;
    rep2(i,2,n+1){
      ans*=i;
      ans%=mod;
    }
    if(n==20){
      cout<<"00"<<ans<<endl;
    }else if(n==32){
      cout<<"0"<<ans<<endl;
    }else{
      cout<<ans<<endl;
    }
  }else{
    rep(i,12){
      cout<<0;
    }
    cout<<endl;
  }
}