import sys
sys.setrecursionlimit(10**6)

n = int(input())
point_list = [-1 for _ in range(n+1)]
point_list[1] = 1
  
def move(point):
  left = point - point.bit_count()
  right = point + point.bit_count()
  move_left = False
  move_right = False
  if left > 0:
    if point_list[left] == -1:
      point_list[left] = point_list[point] + 1
      # move(left)
      move_left = True
  if right < n + 1:
    if point_list[right] == -1:
      point_list[right] = point_list[point] + 1
      # move(right)
      move_right = True
  if move_left and move_right:
    if left < n:
      move(right)
      move(left)
    else:
      move(left)
      move(right)
  elif move_left:
    move(left)
  elif move_right:
    move(right)

move(1)
if point_list[n] != -1 :
  print(point_list[n])
else :
  print(-1)