#include <iostream>
using namespace std;
int main() {
	long long N, normal_fame = 0,special_fame;
	cin >> N;
	special_fame = 2 * N;
	while (true) {
		normal_fame += N;
		if ((N /= 2) == 0) { break; }
	}
	cout << special_fame - normal_fame << endl;
	return 0;
}