#include <bits/stdc++.h>

using namespace std;

typedef pair<int,int> PII;
typedef pair<int,pair<int,int>> PIPII;
typedef long long ll;

const double EPS = 1e-8;
const int INF = 1e9;
const int MOD = 1e9+7;

int dx[] = {0,1,0,-1};
int dy[] = {1,0,-1,0};

int gcd(int a, int b) {
  return b != 0 ? gcd(b, a % b) : a;
}

int calc(int l){
	int n = 1e4;
	int cnt = 0;
	for(int i=n;i>=1;i--){
		for(int j=i-1;j>=1;j--){
			if((i-j)%2 == 1 && gcd(i,j)==1){
				ll a = i;
				ll b = j;
				if( (a*a+2*a*b+a*a)*4 <= l)cnt++;
			}
		}
	}
	return cnt;
}

int main(void){
	int l;
	cin >> l;
	cout << calc(l) << endl;
	return 0;
}