m people and n rooms: C(m+n-1,m), instead of C(m+n-1,n).

皆兄弟也 · 2010-06-17 10:00:40Z

m people and n rooms: C(m+n-1,m), instead of C(m+n-1,n).简介

来源: 皆兄弟也于 2010-06-17 10:00:40 [档案] [博客] [旧帖] [给我悄悄话] 阅读数 : (28 bytes)

回答: 解释：|OOO|OOOOOOOOOO|O||OOOOO|.....|OOO|||O|OOOOOOOOO|O| 由皆兄弟也于 2010-06-17 07:43:19

C(m+n-1,m) = C(m+n-1,n-1)

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• I'm sorry,I think n=N,at first. -jinjing- ♀ (0 bytes) () 06/17/2010 postreply 15:08:21