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

void fast_io() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
}

int main() {
	fast_io();
	long long n;
	cin >> n;
	int cnt = __builtin_popcountll(n);
	long long ans = (1LL << cnt) - 2;
	cout << ans << endl;
}