def ones(m):
  return bin(m).count('1')

def expand(m, n):
  dm = ones(m)
  ms = [m - dm, m + dm]
  return [m for m in ms if 0 < m <= n]

def bfs(frontier, visited, n):
  while frontier:
    path = frontier.pop(0)
    last = path[-1]
    if last == n:
      return path
    elif last not in visited:
      visited.add(last)
      for m in expand(last, n):
        frontier.append(path + [m])

n = int(raw_input())
path = bfs([[1]], set(), n)
if path:
  print len(path)
else:
  print -1