#include <iostream>
#include <string>

using namespace std;

int cnt1(int a) {
  int cnt1 = 0;
  while (a != 0) {
    if (a & 0x00001 == 1) {
      cnt1++;
    }
    a = a >> 1;
  }
  return cnt1;
}

int main() {
  int n; 
  cin >> n;
  int cnt = 1;
  int w = 1;
  int a = 1;
  int ng;

  while (a != n && cnt < 1000) {
    w = cnt1(a);
    if (a + w > n) {
      if ((a - w) >= 0) {
        a -= w;
      } else {
        cout << -1 << endl;
        return -1;
      }
    } else {
      a += w;
    }
    cnt++;
  }
  // aaaaa 
  if (cnt == 1000) {
    cout << -1 << endl;
  } else {
    cout << cnt << endl;
  }
  return 0;
}