#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
using ll = long long;
constexpr long long MOD = 1000000007;
constexpr long long MOD2 = 998244353;
constexpr long long INF = 1LL << 60;
const long double PI = acosl(-1.0);
constexpr long double EPS = 1e-11;
template<class T> inline bool chmin(T& a, T b) {
	if (a > b) {
		a = b;
		return true;
	}
	return false;
}
template<class T> inline bool chmax(T& a, T b) {
	if (a < b) {
		a = b;
		return true;
	}
	return false;
}
int main(){
    ll N;
    cin >> N;
    map<ll, ll> mp;
    ll ans = 0;
    for (ll i = 1; i < N; i++) mp[i * i]++;
    for (ll i = 1; i < N;i++){
        if (mp.count(N * N - i * i)) {
            ans++;
        }
    }
    cout << ans << endl;
}