#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pii;
#define pb push_back
#define mp make_pair
#define fi first
#define se second

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