import sys
input=lambda: sys.stdin.readline().rstrip()
n=int(input())
inf=float("inf")
Dist=[inf]*(n+1)

def popcount(x):
  x=x-((x>>1)&0x5555555555555555)
  x=(x&0x3333333333333333)+((x>>2)&0x3333333333333333)

  x=(x+(x>>4))&0x0f0f0f0f0f0f0f0f
  x=x+(x>>8)
  x=x+(x>>16)
  x=x+(x>>32)
  return x&0x0000007f

Dist[1]=1
import collections
S=collections.deque()
S.append(1)
while S:
  s=S.popleft()
  ss=popcount(s)
  if s+ss<=n and Dist[s+ss]==inf:
    Dist[s+ss]=Dist[s]+1
    S.append(s+ss)
  if s-ss>=1 and Dist[s-ss]==inf:
    S.append(s-ss)
    Dist[s-ss]=Dist[s]+1
print(-1 if Dist[n]==inf else Dist[n])