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第二、三行很容易懂，第一行很难懂：（用）二分（试探）平均值，再减去这个平均值……

Posted by frkstyc at 2005-04-19 13:15:08 on Problem 2018
In Reply To:Re:uni的原话，没看懂，被迫猜意思 Posted by:uni at 2005-04-19 13:10:10 
> 如果DP，那么一定可以DP出以这个点为左界，的总和最大的值（这个很好DP，从右往左）
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