文件名称:Catch_That_Cow

  • 所属分类:
  • 其他小程序
  • 资源属性:
  • [Windows] [Visual C] [源码]
  • 上传时间:
  • 2012-11-26
  • 文件大小:
  • 176kb
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  • 0次
  • 提 供 者:
  • 上***
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Descr iption



Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N ≤ 100,000) on a number line and the cow is at a point K (0 ≤ K ≤ 100,000) on the same number line. Farmer John has two modes of transportation: walking and teleporting.



* Walking: FJ can move from any point X to the points X - 1 or X + 1 in a single minute

* Teleporting: FJ can move from any point X to the point 2 × X in a single minute.



If the cow, unaware of its pursuit, does not move at all, how long does it take for Farmer John to retrieve it?



Input



Line 1: Two space-separated integers: N and K

Output



Line 1: The least amount of time, in minutes, it takes for Farmer John to catch the fugitive cow.

Sample Input



5 17

Sample Output



4

Hint



The fastest way for Farmer John to reach the fugitive cow is to move along the following path: 5-10-9-18-17, which takes 4 minutes.-shangdiwangpai

Descr iption



Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N ≤ 100,000) on a number line and the cow is at a point K (0 ≤ K ≤ 100,000) on the same number line. Farmer John has two modes of transportation: walking and teleporting.



* Walking: FJ can move from any point X to the points X- 1 or X+ 1 in a single minute

* Teleporting: FJ can move from any point X to the point 2 × X in a single minute.



If the cow, unaware of its pursuit, does not move at all, how long does it take for Farmer John to retrieve it?



Input



Line 1: Two space-separated integers: N and K

Output



Line 1: The least amount of time, in minutes, it takes for Farmer John to catch the fugitive cow.

Sample Input



5 17

Sample Output



4

Hint



The fastest way for Farmer John to reach the fugitive cow is to move along the following path: 5-10-9-18-17, which takes 4 minutes.
相关搜索: Catch
That
Cow

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下载文件列表

Catch_That_Cow\Catch_That_Cow.cpp

..............\Catch_That_Cow.dsp

..............\Catch_That_Cow.dsw

..............\Catch_That_Cow.ncb

..............\Catch_That_Cow.opt

..............\Catch_That_Cow.plg

..............\Debug\Catch_That_Cow.exe

..............\.....\Catch_That_Cow.ilk

..............\.....\Catch_That_Cow.obj

..............\.....\Catch_That_Cow.pch

..............\.....\Catch_That_Cow.pdb

..............\.....\StdAfx.obj

..............\.....\vc60.idb

..............\.....\vc60.pdb

..............\ReadMe.txt

..............\StdAfx.cpp

..............\StdAfx.h

..............\Debug

Catch_That_Cow

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