#include <bits/stdc++.h>

using namespace std;

struct Initializer {
  Initializer() {
    cin.tie(0);
    ios::sync_with_stdio(0);
    cout << fixed << setprecision(15);
  }
} initializer;

int main() {
  int64_t n, m = 0;
  cin >> n;
  for (int64_t i = n; i; i /= 2) {
    m += i;
  }
  cout << 2 * n - m << endl;
}