# coding: utf-8
# Your code here!

n=int(input())

lst = [0]*(n+1)

def f(num,cnt):
    
    if num==n:
        print(cnt)
        return True
    
    if num<1 or num > n:
        return False
    
    step = str(bin(num))[2:].count("1")
    fowd_n = num+step
    back_n = num-step
    
    if fowd_n<=n and lst[fowd_n]==0:
        if f(fowd_n,cnt+1):
            return True
        else:
            lst[fowd_n]=1
    if back_n<=n and lst[back_n]==0:
        if f(back_n,cnt+1):
            return True
        else:
            lst[back_n]=1
            return False

lst[1]=1
if f(1,1)==False:
    print(-1)