#include<iostream>
#include<fstream>

using namespace std;

long nr_perm(long n){
    if(n<=2){
        return 2;
    }
    int nr=2;
    for(int i=2;i<n;i++){
        nr*=i%1048576;
    }

    return nr;
}

int main(){
    long val;
    ifstream f("12perm.in");
    f>>val;
    f.close();

    long res=nr_perm(val);


    ofstream out("12perm.out");
    out<<res;
    out.close();

    return 0;


}