回复:回复:让人烦恼的礼金卡问题

回答: 让人烦恼的礼金卡问题孤苦的人2009-01-01 16:43:17

The optimal solution gets you 1000 * r, where r is the value such that 0
r*(1-r)/(1-0.81*r*r)

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回复:回复:回复:让人烦恼的礼金卡问题 -justatry- 给 justatry 发送悄悄话 (88 bytes) () 01/06/2009 postreply 21:45:31

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