#include <bits/stdc++.h>
using namespace std;
#define REP(i, n) for (int i = 0; i < (int)(n); i++)
typedef long long ll;
typedef pair<int, int> P;
const int INF = 1e9;
int main() {
  ll N;
  cin >> N;
  if (N == 1 || N == 2 || N == 4 || N == 6) {
    cout << -1 << endl;
  } else {
    cout << 1 << endl;
  }
}