 |
| ||||
Home Page
F.A.Qs
Statistical Charts
Past Contests
Scheduled Contests
Award Contest
| ||||||||||
| Online Judge | Problem Set | Authors | Online Contests | User | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest | |||||||||
一条长链分成两段, 其实就是一种以1开始的排列,一种以2开始的排列,然后所有情况都包含其中, 把一个以1开始的链在2断开就是两条In Reply To:这题。。公式怎么得出来的? Posted by:Roba at 2006-11-06 16:16:03 > 一个循环的时候是(n-1)!，两个的时候怎么算? Followed by:
Post your reply here: |
All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator
