回复：C(N+n-1,n)

Blue_Diamond 2010-06-14 22:23:33 ( reads)

(N+n-1)
( n )
or, equal to
(N+n-1)
( N-1 )

跟帖(12)

对！此题有点挑战性。请解释下您的答案：C(N+n-1,n)

Blue too busy, I try...

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

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

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

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

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

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

sorry, not smart enough.

回复：sorry, not smart enough.

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

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