#ifdef __LOCAL
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int,int>;
using PIL = pair<int,ll>;
using PLI = pair<ll,int>;
using PLL = pair<ll,ll>;

template<class T> bool chmin(T &a, T b) {if(a>b){a=b;return 1;}return 0;}
template<class T> bool chmax(T &a, T b) {if(a<b){a=b;return 1;}return 0;}
template<class T> void show_vec(T v) {for (int i=0;i<v.size();i++) cout<<v[i]<<endl;}
template<class T> void show_pair(T p) {cout<<p.first<<" "<<p.second<<endl;}
template<class T> bool judge_digit(T bit,T i) {return (((bit&(1LL<<i))!=0)?1:0);}
#define REP(i,n) for(int i=0;i<int(n);i++)
#define ROUNDUP(a,b) (((a)+(b)-1)/(b))
#define YESNO(T) cout<<(T?"YES":"NO")<<endl
#define yesno(T) cout<<(T?"yes":"no")<<endl
#define YesNo(T) cout<<(T?"Yes":"No")<<endl

const int INFint = 1 << 29;
const ll INF = 1LL << 60;
const ll MOD = 1000000007LL;
const double pi = 3.14159265358979;
const vector<int> h_idx4 = {-1, 0,0,1};
const vector<int> w_idx4 = { 0,-1,1,0};
const vector<int> h_idx8 = {-1,-1,-1, 0,0, 1,1,1};
const vector<int> w_idx8 = {-1, 0, 1,-1,1,-1,0,1};



int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(15);

    ll n;
    cin >> n;
    set<ll> S;
    for (ll i = 1; i <= 200005; i++){
        S.insert(i * i);
    }

    ll ans = 0;

    for (ll i = 1; i * i < n * n; i++){
        ll y = (n * n) - (i * i);

        if (S.count(y)) ans++;
    }

    cout << ans << endl;
}