#include <bits/stdc++.h>
using namespace std;
using namespace chrono;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif

int main() {
    int64_t n;
    cin >> n;

    auto f = [](int64_t x) -> bool {
        int64_t ok = 1, ng = (1LL << 30);
        while (1 < abs(ok - ng)) {
            int64_t mid = midpoint(ok, ng);
            ((mid * mid <= x) ? ok : ng) = mid;
        }
        return ok * ok == x;
    };

    int64_t ans = 0;

    for (int64_t x = 1; x <= n; x++) {
        if (f(n * n - x * x)) {
            ans++;
        }
    }

    cout << ans << endl;

    return 0;
}