#include <bits/stdc++.h>
using namespace std;
#define SI(v) static_cast<int>(v.size())
int main() {
	string s; cin >> s;
	auto v = stoi(s.substr(max(0, SI(s) - 2)));
	cout << (s == "1" || s == "4" || v % 4 == 2 ? -1 : 1) << endl;
}