#include<bits/stdc++.h>
#define ll long long
using namespace std;
ll a;
int main(){
	ios::sync_with_stdio(false);
	cin >> a;
	ll x=2, num=0, dou=1;
	ll sum=1;
	while(x<a){
		sum+=dou*(num+2);
		x*=2; num++; dou*=2;
	}
	a-=dou;
	sum+=a*(num+2);
	cout<<sum;
	return 0;

}