回复：c Could you provide some details for

来源: wxcfan123 于 2011-06-11 18:57:48 [] [旧帖] [给我悄悄话] 阅读数 : (247 bytes)
回答: c 由 15少 于 2011-06-01 03:34:14

3) for any n in C, f(n) <= 2c (why?)

6) for each b in B, there is an unique a in A, with f(a)=b (why?)

And from 6), one can only say number of elements in B <= number of element in A.

 

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• figure out missing details. Nice problem and nice solution. -wxcfan123- ♂ 给 wxcfan123 发送悄悄话 (335 bytes) () 06/12/2011 postreply 14:36:53

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