The optimal solution gets you 1000 * r, where r is the value such that 0
r*(1-r)/(1-0.81*r*r)
回复:回复:让人烦恼的礼金卡问题
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回复:回复:回复:让人烦恼的礼金卡问题
-justatry-
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01/06/2009 postreply
21:45:31