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

using ll = int64_t;
using ul = uint64_t;
using ld = long double;
using vi = vector<int>;
using vd = vector<double>;
using vc = vector<char>;
using vs = vector<string>;
using vb = vector<bool>;
using vl = vector<ll>;
using vvi = vector<vi>;
using vvd = vector<vd>;
using vvc = vector<vc>;
using vvb = vector<vb>;
using vvl = vector<vl>;
using mint = modint998244353;
using vm = vector<mint>;

int main() {
  ll N;
	cin >> N;
	if (N == 1) {
		cout << 1 << endl;
		return 0;
	}
	ll K = 0;
	for (ll a = 2; a*a <= N; a++) {
		if (N%a != 0) continue;
		int exp = 0;
		while(N%a == 0) {
			N /= a;
			exp++;
		}
		if (exp > 1) {
			cout << 0 << endl;
			return 0;
		}
		K++;
	}
	if (N > 1) K++;
	if (K%2 == 0) cout << 1 << endl;
	else cout << -1 << endl;
  return 0;
}