#include <bits/stdc++.h>
using namespace std;
using ll = long long;
// --------------------------------------------------------
#define FOR(i,l,r) for (ll i = (l); i < (r); ++i)
#define REP(i,n) FOR(i,0,n)
// --------------------------------------------------------


// 平方数判定: O(log n)
bool is_square_number(ll n) {
    ll l = 0, r = 1e9;
    while (r - l > 1) {
        ll m = (l + r) / 2;
        (n <= m*m ? r : l) = m;
    }
    return r*r == n;
}


int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(15);

    ll N; cin >> N;

    ll ans = 0;
    FOR(x,1,N) {
        ll y2 = N*N - x*x;
        if (is_square_number(y2)) ans++;
    }
    cout << ans << endl;

    return 0;
}
// Verify: https://yukicoder.me/problems/no/1593