#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define printVec(v) printf("{"); for (const auto& i : v) { std::cout << i << ", "; } printf("}\n");
#define degreeToRadian(deg) (((deg)/360)*2*M_PI)
#define radianTodegree(rad) (((rad)/2/M_PI)*360)
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
using namespace std;
using P = pair<int,int>;
using ll = long long;
const ll INF = 1LL<<60;
const int MOD = 1e9 + 7;
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};

//cin.tie(0);ios::sync_with_stdio(false);
//cout << fixed << setprecision(15) << y << endl;
int main() {
  string s;
  cin >> s;

  if ((s.back() - '0') % 2 == 1) {
    if (s == "1") {
      cout << -1 << endl;
    } else {
      cout << 1 << endl;
    }
  } else {
    if (s.size() >= 2) {
      string sub = s.substr(s.size() - 2, 2);
      if (stoi(sub) % 4 != 0) {
	cout << -1 << endl;
      } else {
	cout << 1 << endl;
      }
    } else {
      if ((s[0] - '0') % 4 != 0) {
	cout << -1 << endl;
      } else {
	if (s[0] == '4') {
	  cout << -1 << endl;
	} else {
	  cout << 1 << endl;
	}
      }
    }
  }
  return 0;
}