//https://yukicoder.me/submissions/630747
#include <bits/stdc++.h>
class Problem {
public:

  void solve() {
    long long N; std::cin >> N;
    std::vector<long long> Score;
    while (N != 0) {
      Score.emplace_back(N);
      N /= 2;
    }

    std::cout << Score[0] * 2 - std::accumulate(Score.begin(), Score.end(), 0ll) << std::endl;
  }
};

int main(void) {
  Problem solver;
  solver.solve();
}