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对！此题有点挑战性。请解释下您的答案：C(N+n-1,n)

皆兄弟也 2010-06-15 12:32:08 ( reads)

跟帖(11)

jinjing

2010-06-16 20:58:07

Blue too busy, I try...

皆兄弟也

2010-06-17 06:59:23

Thanks for your try..., but hard to follow

皆兄弟也

2010-06-17 07:43:19

解释：|OOO|OOOOOOOOOO|O||OOOOO|.....|OOO|||O|OOOOOOOOO|O|

jinjing

2010-06-17 08:30:56

回复：解释：|OOO|OOOOOOOOOO|O||OOOOO|.....|OOO|||O|OOOOOOOOO|O|

皆兄弟也

2010-06-17 10:00:40

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

jinjing

2010-06-17 15:08:21

I'm sorry,I think n=N,at first.

jinjing

2010-06-17 08:53:58

回复：解释：|OOO|OOOOOOOOOO|O||OOOOO|.....|OOO|||O|OOOOOOOOO|O|

皆兄弟也

2010-06-17 10:15:10

sorry, not smart enough.

Jinjing

2010-06-17 15:03:30

回复：sorry, not smart enough.

jinjing

2010-06-17 16:17:14

should be 1111---41,43,34,14 .

皆兄弟也

2010-06-17 10:48:31

it seems i have understood you. you may have solved the problem