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

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>

int main() {
  string s;
  cin >> s;

  int ans;

  if (s.size() == 1) {
    if (s[0] == '2' || s[0] == '6') ans = -1;
    else ans = 1;
  } else {
    int n = s.size();

    int x = (s[n-2] - '0') * 10 + (s[n-1]-'0'); // 下２桁


    if (x%2 || (x%4 == 0)) ans = 1;
    else ans = -1;
  }

  cout << ans << endl;


}