#include <iostream>
#include <string>

using namespace std;

// valを2進数で表現した時の1のビット数
int toPoint(int val) {
  if (!val)
    return 0;
  int point = 0;
  while (val != 0) {
    if (!(val & 1) == 0)
      point++;
    val >>= 1;
  }
  return point;
}

int main() {
  int N;
  cin >> N;

  int i = 1;
  int count = 1;
  bool rireki[N];

  for (int j = 0; j < N; j++)
    rireki[j] = false;

  while (!(i == N)) {
    if (rireki[i]) {
      count = -1;
      break;
    }
    rireki[i] = true;
    if (i + toPoint(i) > N) {
      i = i - toPoint(i);
    } else {
      i = i + toPoint(i);
    }
    count++;
  }

  cout << count << endl;

  return 0;
}