Online JudgeProblem SetAuthorsOnline ContestsUser
Web Board
Home Page
F.A.Qs
Statistical Charts
Problems
Submit Problem
Online Status
Prob.ID:
Register
Update your info
Authors ranklist
Current Contest
Past Contests
Scheduled Contests
Award Contest
User ID:
Password:
  Register

Re:这题有公式么,谁能给点提示么。 好像和置换群有关

Posted by pladene at 2004-02-03 09:17:07 on Problem 1063
In Reply To:这题有公式么,谁能给点提示么。 好像和置换群有关 Posted by:lemongxr at 2004-01-19 19:50:37
考虑每flip一次,盘子位置的变化。
给盘子所在位置按1,2,3,……编号,如果总数是奇数,则通过flip,盘子可以到任何位置;否则,flip不能改变其所在位置的奇偶性

Followed by:

Post your reply here:
User ID:
Password:
Title:

Content:

Home Page   Go Back  To top


All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator