#define _GLIBCXX_DEBUG
#define ll long long
#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;

int main(){
  ll N; cin >> N;
  ll ans = N*2;
  ll sum = 0;
  while(N>0){
    sum += N;
    N /= 2;
  }
  cout << ans-sum << endl;
}