1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define vc vector
#define st first
#define nd second
#define pll pair<ll, ll>
#define sz(a) (ll)a.size()
#define all(a) a.begin(), a.end()
#define pu push
#define pub push_back
#define pob pop_back
#define em emplace
#define emb emplace_back

void program() {
	ll n;
	cin >> n;
	vc<ll> ab(n * n + 1, 0);
	for (ll a = 1; a <= n; a++)
		for (ll b = a; b <= n; b++) {
			ll k = a * a + b * b;
			if (k <= n * n)
				ab[k]++;
		}
	
	ll ans = 0;
	for (ll d = 1; d <= n; d++)
		for (ll h = 1; h <= d; h++)
			ans += ab[d * d - h * h];
	cout << ans << "\n";
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	program();
	return 0;
}