#include <iostream>
#include <string>
#include <algorithm>
#include <functional>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <cstdio>
#include <cmath>
#include <tuple>
#define int long long
#define rep(i, n) for(i = 0; i < n; i++)
using namespace std;

int n;

signed main() {
	cin >> n;
	
	int ans = 0;
	for (int x = 1; x < n; x++) {
		int y2 = n * n - x * x;
		int ng = -1, ok = n + 1, mid;
		while (ok - ng >= 2) {
			mid = (ng + ok) / 2;
			if (mid * mid >= y2) ok = mid;
			else ng = mid;
		}
		if (ok * ok == y2 && ok >= 1) {
			ans++;
		}
	}
	
	cout << ans << endl;
	return 0;
}