#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

ll N, M, sum;

int main() {
  cin >> N;
  M = N;
  while (M > 0) {
    sum += M;
    M /= 2;
  }
  cout << 2 * N - sum << endl;
  return 0;
}