#include <bits/stdc++.h>
using namespace std;

int L;

int f(int x = 1, int y = 1) {
	int res = (x ^ y) & 1;
	for (int i = y + x; 8 * i * (i + x) <= L; i += x) res += f(i, x);
	return res;
}

int main() {
	cin >> L;
	cout << f() << endl;

	return 0;
}