import queue
N = int(input())
v = [0] * (N + 1)
v[1] = 1
q = queue.Queue()
q.put(1)

while not q.empty():
  i = q.get()
  if i == N:
    break
  c = format(i,'b').count('1')
  if i + c <= N and v[i + c] == 0:
    q.put(i + c)
    v[i + c] = v[i] + 1
  if i - c >  0 and v[i - c] == 0:
    q.put(i - c)
    v[i - c] = v[i] + 1
print(v[i] if i == N else -1)