import math
from heapq import heappush, heappop

N = int(raw_input())
heap = []
heappush(heap,(1,1))
arrived = [False for i in range(N+1)]
while len(heap)>0:
   dist, num = heappop(heap)
   if arrived[num]:
      continue
   if num == N:
      print dist
      exit()
   arrived[num]=True
   tmp = num
   cnt = 0
   while tmp != 0: 
      tmp &= tmp-1
      cnt+=1
   if num-cnt > 0 and arrived[num-cnt] ==False:
      heappush(heap,(dist+1,num-cnt))
   if num+cnt <= N and arrived[num+cnt] ==False:
      heappush(heap,(dist+1,num+cnt))
print -1