#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    ll n;
    cin >> n;
    map<ll, int> mp;
    int ans = 1;
    ll d = n;
    for (ll i = 2; i * i <= n; i++) {
        while (d % i == 0) {
            mp[i]++;
            d /= i;
        }
    }
    if (d != 1)
        mp[d]++;
    for (auto [x, y] : mp) {
        if (y == 1) {
            ans *= -1;
        } else {
            ans = 0;
        }
    }
    cout << ans << endl;
    return 0;
}