#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  int N;
  cin>>N;
  int ans = 0;
  for(int i=1;i<N;i++){
      int l=0,r=N;
      while(r-l > 1){
          int mid = (l+r)/2;
          if(i*i+mid*mid <= N*N) l = mid;
          else r = mid;
      }
      if(i*i+l*l == N*N) ans++;
  }
  cout<<ans<<endl;
}