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

#define rep(i, a, b) for (ll i = a; i < b; i++)
using ll = long long;

int main(){
    ll n;
    cin >> n;
    map<ll, int> mp;
    for(ll i = 2; i * i <= n; i++) {
        while(n % i == 0) {
            mp[i]++;
            n /= i;
        }
    }
    if(n != 1) mp[n]++;
    if(mp.size() == 0) {
        cout << 1 << endl;
        return 0;
    }
    int f = 0;
    for(auto it = mp.begin(); it != mp.end(); it++) {
        int s = it->second;
        if(s > 1) {
            f = 1;
            break;
        }
    }
    if(f) {
        cout << 0 << endl;
        return 0;
    }
    int k = mp.size();
    if(k % 2) cout << -1 << endl;
    else cout << 1 << endl;
}