#include <iostream>
using namespace std;
int main() {
  int nokori;
  cin >> nokori;
  int kaisu, temochi;
  temochi = 1;
  kaisu = 0;
  if (nokori == 1) {
    cout << 0 << endl;
    return 0;
  }
  while (true) {
    //持ってる枚数で１から総当たりチェック
    for (int i = 1; i <= temochi; i++) {
      if (nokori == (i * 2) + (temochi - i)) {
        cout << kaisu + 1 << endl;
        return 0;
      }
    }
    kaisu++;
    temochi *= 2;
  }
  return 0;
}