#include <bits/stdc++.h> // #include <atcoder/maxflow> #define int long long using namespace std; // using namespace atcoder; using vec_int = vector<int>; using ll = long long; #define rep(i, n) for(int i = 0; i < (int)(n); i++) void cout_line(vector<int> &a){ for(int i=0;i<a.size();i++){ if(i<a.size()-1){ cout<<a.at(i)<<" "; }else{ cout<<a.at(i)<<endl; } } } signed main() { int N; cin>>N; int ans = 0; for(int i=1;i<N;i++){ int y2 = N*N-i*i; double y2d = y2; if(abs(y2d-((int)sqrt(y2d))*((int)sqrt(y2d)))<0.000001){ ans++; } } cout<<ans<<endl; return 0; }