#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;

#include <atcoder/all>
using namespace atcoder;

#define REP(i, n) for(int i = 0; i < (int)n; i++)
#define LREP(i, n) for(LL i = 0; i < (LL)n; i++)
#define RREP(i, n) for(int i = (int)n-1; i >= 0; i--)
#define V(T) vector<T>

#define P pair<int, int>
#define LP pair<LL, LL>
#define T3 tuple<LL, LL, LL>
#define T4 tuple<LL, LL, LL, LL>
#define INF 1000000007
#define SIZE 500100
#define MOD 1000000007
typedef long long LL;

string N;

int main() {
	cin >> N;

	int ans = -1;
	if (N.size() == 1) {
		if (N[0] == '1') {
			ans = -1;
		}
		else {
			int d = N[N.size() - 1] - '0';
			if (d % 2 == 1) {
				ans = 1;
			}
			else if(d == 4) {
				ans = -1;
			}
			else if (d % 4 == 0) {
				ans = 1;
			}
			else {
				ans = -1;
			}
		}
	}
	else {
		int d = stoi(N.substr(N.size() - 2));
		if (d % 2 == 1) {
			ans = 1;
		}
		else if (d % 4 == 0) {
			ans = 1;
		}
		else {
			ans = -1;
		}
	}
	cout << ans << endl;
}