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

int main(){
    int N;
    string S;
    
    cin >> S;
    N = S.size();
    
    int last2 = stoi(S.substr(max(0, N-2), N));
    int last = stoi(S.substr(max(0, N-1), N));
    
    if (last2 % 4 == 0 && (N > 1 || (N == 1 && last > 4))){
        cout << 1 << endl;
    }else if(last % 2 == 1 && last > 1){
        cout << 1 << endl;
    }else{
        cout << -1 << endl;
    }

    return 0; 
}