# -*- coding: utf-8 -*-

import sys
import os
import myutil
from queue import Queue

class Option:
    val = []
    def isNone(v):
        return isinstance(v, _None)
    def unwrap(v):
        return v.val[0]

class Some(Option):
    def __init__(self, v):
        self.val = [v]
    def __str__(self):
        return "Some(" + str(self.val[0]) + ")"

class _None(Option):
    def __init__(self):
        self.val = []
    def __str__(self):
        return "_None"

def lfind(pred, ls):
    res = list(filter(pred, ls))
    if len(res) > 0:
        return Some(res[0])
    else:
        return _None()

def lookup(key, ls):
    res = lfind(lambda l: l[0] == key, ls)
    if Option.isNone(res):
        return _None()
    else:
        return Some(Option.unwrap(res)[1])

def rangeOfCell(n, acc):
    if n==0:
        return acc
    else:
        return rangeOfCell(n//2, acc+(n%2))

def neighborsOf(memo, i):
    res = []
    for j in range(0, len(memo)):
        r = memo[j][0]
        if abs(i-j) == r and memo[j][1] == -1:
            res += [j]
    return res

def bfs(memo):
    q = Queue()
    goal = len(memo) - 1
    q.put(goal)
    while not q.empty():
        i = q.get()
        if i == 0:
            return memo[i][1]
        else:
            count = memo[i][1]
            neighbors = neighborsOf(memo, i)
            for n in neighbors:
                memo[n] = (memo[n][0], count+1)
                q.put(n)
    return -1

def solve(inputs):
    memo  = [(rangeOfCell(i+1, 0), 1) if i == inputs - 1 else (rangeOfCell(i+1, 0), -1) 
             for i in range(0, inputs)]
    print(bfs(memo))

inputs = int(input())
solve(inputs)