#include<iostream>
#include<string>
#include<algorithm>
#include<cmath>
#include<iomanip>
#include<cstring>
#include<map>
#include<vector>
#include<queue>
#include<climits>
using namespace std;
typedef long long int ll;

int main(){

	ll n, total1=0, total2=0;
	cin >> n;
	total2+=2*n;
	while(n){
		total1+=n;
		n/=2;
	}

	cout << abs(total1-total2) << endl;
  
  return 0;
}