遇事不绝，暴力美学！

#include <bits/stdc++.h>
using namespace std;
#define int long long
int n, ans;

signed main() {
	cin >> n;
	for (int i = 0; i <= n; i++) {
		if ((i ^ (2 * i) ^ (3 * i)) == 0) {
			ans++;
		}
	}
	cout << ans;
	return 0;
}