# -*- coding: utf-8 -*-
import sys
import math
import copy

def main():
    text = sys.stdin.readline()
    goal = int(text)    #ゴール
    ini_pos = 1           #初期値
    ini_cost = 0
    pos_cos = [ini_pos,ini_cost]   #[position,cost]
    costlist = [-1]*goal
    exactlist = [False]*goal
    costlist[0] = ini_cost
    exactlist[0] = True
    q = Que()
    q.addQ(pos_cos)
    
    #経路探索処理→ダイクストラ法、ゴールに到達した時点で終了
    while not q.isEmpty():
        pos_cos = q.popQ()

        #行先判定処理
        next_position_list = nextGoto(pos_cos[0])
        for p in next_position_list:
            if p == goal:
                pos_cos[0] = p
                pos_cos[1] += 1
                exactlist[p-1] = True
                costlist[p-1] = pos_cos[1]
                print(costlist[goal-1])
                return
            elif p < 1 or p > goal:
                continue
            elif exactlist[p-1]:
                continue
            else:
                pos_cos[0] = p
                pos_cos[1] += 1
                exactlist[p-1] = True
                costlist[p-1] = pos_cos[1]
                q.addQ(pos_cos)
    print(-1)
    return

class Que():
    q_list = []
    def lenQ(self):
        return len(self.q_list)
    def addQ(self,arg_pathlist):
        self.q_list.append(arg_pathlist)
        return
    def popQ(self):
        return self.q_list.pop(0)
    def isEmpty(self):
        if len(self.q_list) <= 0 :
            flag = True
        else:
            flag = False
        return flag

#行先返答関数
def nextGoto(arg_position):
    binary_text = bin(arg_position)
    move = len(binary_text.replace("0b","").replace("0",""))
    goto = [arg_position - move, arg_position + move]
    return goto

if __name__ == "__main__":
    main()