import Queue

def countBit(n):
  s=str(bin(n))
  count=0
  for i in xrange(len(s)):
    if s[i]=="1": count+=1
  return count

N=int(raw_input())
lst=[10**9]*(N+1)
lst[1]=1
q=Queue.Queue()
q.put(1)
while(not q.empty()):
  a=q.get()
  c=countBit(a)
  if a-c>0 and lst[a-c] > lst[a]+1:
    lst[a-c] = lst[a]+1
    q.put(a-c)
  if a+c<=N and lst[a+c] > lst[a]+1:
    lst[a+c] = lst[a]+1
    q.put(a+c)
if lst[N]==10**9: print -1
else: print lst[N]