#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define vl vector<ll>
auto _ = []() { ios::sync_with_stdio(false); cin.tie(nullptr); return 0; }();

bool prime(ll N) {
  
  if (N < 2) return false;
  
  for (ll i = 2; i * i <= N; i++) {
    
    if (N % i == 0) return false;
    
  }
  
  return true;
  
}

vl yaku(ll N) {
  
  vl a;
  
  ll temp = N;
  
  for (ll i = 2; i * i <= temp; i++) {
    
    if (temp % i == 0) {
      
      a.push_back(i);
      
      while (temp % i == 0) temp /= i;
      
    }
    
  }
  
  if (temp > 1) a.push_back(temp);
  
  return a;
  
}

int main() {
  
  ll N; cin >> N;
  
  if (N == 1) {
    
    cout << 1 << "\n";
    
    return 0;
    
  }
  
  if (prime(N)) {
    
    cout << -1 << "\n";
    
    return 0;
    
  }
  
  for (ll i = 2; i * i <= N; i++) {
    
    if (N % (i * i) == 0) {
      
      cout << 0 << "\n";
      
      return 0;
      
    }
    
  }
  
  vl a = yaku(N);
  
  if (a.size() % 2 != 0) cout << -1 << "\n";
  
  else cout << 1 << "\n";
  
  return 0;
}