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

int main() {
    ll n;
    cin >> n;
    set<ll> st;
    for (int i = 1; i <= n; i++) {
        st.insert(i * i);
    }
    int ans = 0;
    for (int i = 1; i <= n; i++) {
        ll tmp = n * n - i * i;
        if (st.count(tmp)) {
            ans++;
        }
    }
    cout << ans << endl;
}