#include<iostream>

using namespace std;

long long n;
int main(){
	cin >> n;
	
	long long s = n * 2;
	
	long long ns = 0;
	
	while(n > 0){
		ns += n;
		n /= 2;
	}
	
	cout << (s - ns) << endl;
	
	return 0;
}