#include <bits/stdc++.h>
#define rep(i, ss, ee) for (int i = ss; i < ee; ++i)
using namespace std;
using ull = unsigned long long;
ull N;
void input() { cin >> N; }
void solve() {
  ull a = N;
  ull sum = 0;
  while (a > 0) {
    sum += a;
    a /= 2;
  }
  cout << N * 2 - sum << endl;
}
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  input();
  solve();
}