#include<bits/stdc++.h>
// #include<atcoder/all>
// #include<boost/multiprecision/cpp_int.hpp>

using namespace std;
// using namespace atcoder;
// using bint = boost::multiprecision::cpp_int;
using ll = long long;
using ull = unsigned long long;
using P = pair<int,int>;
#define rep(i,n) for(ll i = 0;i < (ll)n;i++)
#define ALL(x) (x).begin(),(x).end()
#define MOD 1000000007


int main(){
  
  ll n;
  cin >> n;
  int res = 0;
  for(ll x = 1;x < n;x++){
    ll l = 0,r = n;
    while(r-l > 1){
      ll mid = (l+r)/2;
      if(x*x + mid*mid >= n*n)r = mid;
      else l = mid;
    }
    if(x*x + r*r == n*n)res++;
  }
  cout << res << "\n";

  return 0;
}