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用复数去表示点就可以了

Posted by frkstyc at 2005-09-12 11:27:48 on Problem 2600
In Reply To:Re:和二分差不多吧，不过这个题有解析表达式的 Posted by:comerpass at 2005-09-12 11:06:16 
> 推不出来，能指点一下吗
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