#include <iostream>
#include <cstdint>
using namespace std;

int main(){
	uint64_t n, sum = 0;
	cin >> n;
	uint64_t n1 = n;
	while (n1 != 0) {
		sum += n1;
		n1 /= 2;
	}
	cout << n * 2 - sum << endl;
	return 0;
}