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

const ll mod = 1000000007;
const int INF = 1001001001;

int main(){
    string s; cin >> s;
    int sz = s.size();
    if(sz == 1){
        int k = s[0] - '0';
        if(k == 4 || k == 1) cout << -1 << endl;
        else if(k == 8 || k % 2 == 1) cout << 1 << endl;
        else cout << -1 << endl;
    }
    if(sz >= 2){
        int k = (s[0] - '0') + 10 * (s[1] - '0');
        if(k % 4 == 0 || k % 2 == 1) cout << 1 << endl;
        else cout << -1 << endl;
    }
}