#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
  ll n;
  cin >> n;
  ll A = n * 2;
  ll B = 0;
  while (n > 0) {
    B += n;
    n /= 2;
  }
  ll ans = A - B;
  cout << ans << '\n';
  return 0;
}