#include <bits/stdc++.h>

using namespace std;

int main(){
    int64_t n;
    cin >> n;
    vector<int64_t> v(n, 1);
    set<int64_t> s;
    for(int64_t i = 1;i < n;i++){
         v[i] = i * i;
         s.insert(v[i]);
    }
    int64_t root = n * n;
    int ans = 0;
    for(int i = 1;i < n;i++){
        if(v[i] >= root) break;
        if(s.find(root - v[i]) != s.end()){
            ans++;
        }
    }
    cout << ans << endl;
}