n=gets.to_i+1
a=(0..n).map{|i|i.to_s(2).count ?1};a[0]=1
r=Array.new(n,-1);r[0]=0
n.times{|i|
  break if !r.include?(i)
  n.times{|j|
    next if r[j]!=i
    x,y=j-a[j],j+a[j]
    r[x]=i+1 if x>0&&r[x]<0
    r[y]=i+1 if y<n&&r[y]<0
  }
}
p r[n-1]