#include <bits/stdc++.h>
using namespace std;
#define fastcin {\
    cin.tie(0);\
    ios::sync_with_stdio(false);\
}
#define rep(i, a, b) for(int i = a; i < b; i++)
#define rrep(i, a, b) for(int i = a; i >= b; i--)
#define fore(i, a) for(auto &i:a)
#define print(x) cout << x << "\n"
#define SORT(a, n) sort(a, a+n);
#define REVERSE(a,n) reverse(a,a+n);
#define VSORT(v) sort(v.begin(), v.end());
#define VREVERSE(v) reverse(v.begin(), v.end());
#define MOD 1000000007
#define yes "YES"
#define no "NO"
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vll;

int main() {
    fastcin;
    ll l, m = 1, n, t, ans = 0, a, b, c, g;
    cin >> l;
    set<pair<ll, ll> > sp;
    do {
        t = ans;
        n = 2;
        while(1) {
            a = abs(m*m-n*n);
            b = 2*m*n;
            c = m*m + n*n;
            if(4*(a+b+c)>l) break;
            g = gcd(a, b);
            a /= g, b /= g;
            decltype(sp)::iterator it = sp.find(make_pair(a, b));
            if(it==sp.end()) {
                sp.insert(make_pair(a, b));
                ans++;
            }
            n += 2;
        }
        m += 2;
    } while(t!=ans);
    print(ans);
    return 0;
}