#include<fstream>
using namespace std;
int main()
{
    ifstream in("wilson.in");
    ofstream out("wilson.out");
    long int n,i,p=1;
    in>>n;
    for(i=1;i<n;i++)
        p*=i;
    out<<p%n;
    in.close();
    out.close();
    return 0;
}