/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2020.08.29 15:23:20
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;

int main() {
    string s;cin >> s;
    if (s.size() == 1) {
        int t = s[0] - '0';
        if (t >= 3 && (t % 2 == 1 || t == 8)) {
            puts("1");
        }
        else {
            puts("-1");
        }
    }
    else {
        int t = s[s.size()-1] - '0' + (s[s.size()-2] - '0') * 10;
        if (t % 4 == 0 || t % 2 == 1) {
            cout << 1 << endl;
        }
        else {
            cout << -1 << endl;
        }
    }
    return 0;
}