#include "bits/stdc++.h"
#include<random>
using namespace std; typedef unsigned long long _ulong; typedef long long int lint; typedef pair<lint, lint> plint; typedef pair<double long, double long> pld;
#define ALL(x) (x).begin(), (x).end()
#define SZ(x) ((lint)(x).size())
#define FOR(i, begin, end) for(lint i=(begin),i##_end_=(end);i<i##_end_;i++)
#define IFOR(i, begin, end) for(lint i=(end)-1,i##_begin_=(begin);i>=i##_begin_;i--)
#define REP(i, n) FOR(i,0,n)
#define IREP(i, n) IFOR(i,0,n)
#define endk '\n'
template<class T>bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }
const lint mod = 1e9 + 7, INF = 1e18;
lint dx[8] = { 0, -1, 1, 0, 1, -1, 1, -1 }, dy[8] = { 1, 0, 0, -1, -1, -1, 1, 1 };
typedef pair<double, lint> Pa;
typedef pair<plint, lint> tlint;
struct edge {
	lint cost;
	lint u, v;
};

string s;
int main() {
	cin >> s;
	lint val;
	if (SZ(s) >= 2) val = (s[SZ(s) - 2] - '0') * 10 + (s[SZ(s) - 1] - '0');
	else val = (s[SZ(s) - 1] - '0');
	if (SZ(s) < 2 && val == 1 || val == 4) {
		cout << -1 << endk;
	}
	else if (val % 2 == 0 && val % 4 != 0) {
		cout << -1 << endk;
	}
	else {
		cout << 1 << endk;
	}
}