#include <bits/stdc++.h>
using namespace std;

int main(){
    unsigned long long N;
    cin >> N;
    
    if (N % 4 == 0 && N > 4){
        cout << 1 << endl;
    }else if(N % 2 == 1 && N > 1){
        cout << 1 << endl;
    }else{
        cout << -1 << endl;
    }

    return 0; 
}