#include <bits/stdc++.h>
#define rep(i,n) for(ll (i)=0;(i)<(n);(i)++)
#define repi(i,a,b) for(ll (i)=(a);(i)<(b);(i)++)
#define SIZE_OF_ARRAY(array)    (sizeof(array)/sizeof(array[0]))
typedef long long ll;
using namespace std;

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

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