#include <bits/stdc++.h>

using namespace std;

int main()
{
    ifstream f("main.in");
    long long n;
    cin>>n;
    if(n > 10 && (n % 2 == 0 ||  n % 5 == 0)){
        cout<<0;
        return 0;
    }
    if(n <= 10){
        unsigned long long s = 1;
        for(int i = 1 ; i <= n - 1 ; ++i){
            s *= i;
        }
        cout<<s % n;
        return 0;
    }
    cout<<n - 1;
    return 0;
}