#pragma GCC optimize ("O2")
#pragma GCC target ("avx2")
#include<bits/stdc++.h>

using namespace std;
typedef long long ll;
#define rep(i, n) for(int i = 0; i < (n); i++)
#define rep1(i, n) for(int i = 1; i <= (n); i++)
#define co(x) cout << (x) << "\n"
#define cosp(x) cout << (x) << " "
#define ce(x) cerr << (x) << "\n"
#define cesp(x) cerr << (x) << " "
#define pb push_back
#define mp make_pair
#define chmin(x, y) x = min(x, y)
#define chmax(x, y) x = max(x, y)
#define Would
#define you
#define please

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);

	string S;
	cin >> S;

	if (S == "1") {
		co(-1);
		return 0;
	}
	if (S == "4") {
		co(-1);
		return 0;
	}

	while (S.size() >= 3) {
		S.erase(0, 1);
	}

	int s = stoi(S);

	if (s % 2) co(1);
	else if (s % 4 == 0) co(1);
	else co(-1);


	Would you please return 0;
}