def cbit(x);x.to_s(2).chars.count("1");end

n=gets.to_i

a=Array.new(n+1)
a[1]=1
x=1
stack=[]

while x!=n
    b=cbit(x)
    if x-b>0 &&!a[x-b];stack.push(x-b);a[x-b]=a[x]+1;end
    if x+b<=n&&!a[x+b];stack.push(x+b);a[x+b]=a[x]+1;end 
    if stack.empty?;a[n]=-1;break;end
    x=stack.shift
end
p a[n]