#include<bits/stdc++.h>
#include <atcoder/all>
#define ll long long int
#define vec vector<ll>
#define mat vector<vector<ll>>
#define pll pair<ll,ll>
#define count __builtin_popcountll

using namespace std;
using namespace atcoder;
//using mint = modint1000000007;

const ll mod=1000000007;//998244353;
const ll inf=1000000000000000000;
ll dx4[4]={1,0,-1,0};
ll dy4[4]={0,-1,0,1};
ll dx8[8]={1,0,-1,1,-1,1,0,-1};
ll dy8[8]={1,1,1,0,0,-1,-1,-1};

int main(){
  cout << fixed << setprecision(15);

  ll n;
  cin >> n;

  ll ans=0;
  vec a(n+3);
  for(ll i=1;i<n+3;i++){
    a[i]=i*i;
  }
  for(ll i=1;i<n;i++){
    ll y=n*n-i*i;
    if(*lower_bound(a.begin(),a.end(),y)==y)ans++;
  }

  cout << ans << endl;


  return 0;
}