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

int main()
{
	long long N;
	cin >> N;

	long long a1 = 0;
	long long n = N;
	while( n > 0 ) {
		a1 += n;
		n /= 2;
	}
	long long ans = N + N - a1;

	cout << ans << endl;
}