#include <bits/stdc++.h>
using namespace std;
 
#define fi first
#define se second
#define pb push_back
using vi = vector <int>;
using ll = long long;
using pii = pair <int, int>;
//~ const ll mod = 998244353;
const ll mod = 1e9 + 7;
ll qpow(ll a, ll b, ll m = mod) { ll r = 1, t = a;
	for(; b; b /= 2) { if(b & 1) r = r * t % m; t = t * t % m; } return r; }


int main() {
	ios :: sync_with_stdio(false);
	
	string s; cin >> s; s = "00" + s;
	
	int x = stoi(s.substr(s.size() - 2));
	if(x % 4 != 2)
		cout << 1 << '\n';
	else
		cout << -1 << '\n';
}