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

def main():
    text = sys.stdin.readline()
    goal = int(text)    #ゴール
    path = [1]          #経路記録用
    stack = [path]
    
    #経路探索処理→深さ優先探索、ゴールに到達した時点で終了
    while len(stack) > 0:
        path = stack.pop(-1)

        #行先判定処理
        next_position_list = nextGoto(path[-1])
        for p in next_position_list:
            if p == goal:
                path.append(p)
                #print(path,len(path))
                print(len(path))
                return
            elif p < 1 or p > goal:
                continue
            elif p in path:
                continue
            else:
                buf_path = copy.deepcopy(path)
                buf_path.append(p)
                stack.append(buf_path)
    print(-1)
    return



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

if __name__ == "__main__":
    main()