#include <bits/stdc++.h>
#define ll long long
#define INF 1000000005
#define MOD 1000000007
#define EPS 1e-10
#define rep(i,n) for(int i=0;i<(int)n;++i)
#define each(a, b) for(auto (a): (b))
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
#define pb push_back
#define show(x) cout <<#x<<" = "<<(x)<<endl
#define spair(p) cout <<#p<<": "<<p.fi<<" "<<p.se<<endl
#define svec(v) cout<<#v<<":";rep(kbrni,v.size())cout<<" "<<v[kbrni];cout<<endl
#define sset(s) cout<<#s<<":";each(kbrni,s)cout <<" "<<kbrni;cout<<endl

using namespace std;

typedef pair<int,int>P;

const int MAX_N = 100005;

int main()
{
    ll n;
    cin >> n;
    if(n >= 50){
        rep(i,12){
            cout << 0;
        }
        cout << endl;
    }else{
        ll mod = 1;
        rep(i,16){
            mod *= 10;
        }
        ll ans = 1;
        rep(i,n){
            ans = ans * (i+1) % mod;
        }
        string s;
        int cnt = 0;
        while(ans && cnt < 12){
            cnt++;
            s.pb((char)('0' + ans%10));
            ans /= 10;
        }
        reverse(all(s));
        cout << s << endl;
    }
    return 0;
}