#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < (int)n; i++)
using ll = long long;

int main(){
  ll n;
  cin >> n;
  n *= n;
  map<ll,ll> mp;
  for(ll x = 1; x*x <= n; x++) mp[x*x]++;
  ll ans = 0;
  for(ll x = 1; x*x <= n; x++) if(mp[n-x*x]) ans++;
  cout << ans << endl;
  return 0;
}