//https://yukicoder.me/submissions/630747
#include <bits/stdc++.h>
using i64 = long long;
#define itrall(x) std::begin(x), std::end(x)
class Problem {
public:

  void solve() {
    i64 N; std::cin >> N;
    std::vector<i64> Score;
    while (N != 0) {
      Score.emplace_back(N);
      N /= 2;
    }

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

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