#include "bits/stdc++.h"
#define int long long

using namespace std;
using ll = long long;
using P = pair<ll, ll>;
const ll INF = (1LL << 61);
ll mod = 1000000007;


signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int N; cin >> N;
	map<int, bool>mp;
	for (int i = 1; i <= N; i++)mp[i * i] = true;
	int cnt = 0;
	for (int x = 1; x <= N; x++) {
		int now = N * N - x;
		if (mp[now])cnt++;
	}
	cout << cnt << endl;
	return 0;


}