#include<bits/stdc++.h>
using namespace std;
using ll=long long;
constexpr ll mod=1e9+7;

bool isSqr(ll a) {
   return a == round(sqrt(a))*round(sqrt(a));
}

int main()
{
  cin.tie(0);
  ios_base::sync_with_stdio(false);
  ll n, ans = 0;
  cin>>n;
  for (ll i = 1; i < n; ++i)
  {
    if (isSqr(n*n - i*i)) {
      ans++;
    }
  }
  cout << ans << "\n";
}