# include <iostream>
# include <cstring>
# include <string>
# include <vector>
# include <cmath>
# include <sstream>
# include <iomanip>
# include <algorithm>
using namespace std;

# define repl(i, a, b)	for(int i=(int)(a);i<(int)(b);i++)
# define rep(i, n)	repl(i, 0, n)
typedef long long ll;

int main(){
	ll n, sum1 = 0, sum2 = 0;
	cin >> n;
	int i=0;
	sum2 = n*2;
	while(n != 0){
		sum1 += n;
		n /= 2;
		i++;
	}
	cout << sum2 - sum1 << endl;
	return 0;
}