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

不是一定要乘2吧……

Posted by frkstyc at 2006-03-17 13:19:19 on Problem 2721
In Reply To:1或2*c(a,13)*c(b,13)/c(a+b/26)不对吗? Posted by:Nikov at 2006-03-17 13:17:48


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