#coding: utf-8
#yuki_3
from collections import deque

n=int(raw_input())
d=[0 for i in xrange(n+1)]
d[1]=1
q=deque()
q.append(1)
while q:
 u=q.popleft()
 cnt=bin(u).count('1')
 v1=u+cnt
 v2=u-cnt
 if 0<v1<=n and d[v1]==0:
  q.append(v1)
  d[v1]=d[u]+1
 if 0<v2<=n and d[v2]==0:
  q.append(v2)
  d[v2]=d[u]+1
  
if d[n]==0:
 print -1
else:
 print d[n]