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我擦，收回这句话。做这题时候突然傻掉了……完全没必要树链剖分的说……

Posted by xuhaoran510 at 2011-06-23 21:45:39 on Problem 2831
In Reply To:没有啊……只是感觉这题只能树链剖分啊…… Posted by:xuhaoran510 at 2011-06-23 21:40:18 
> rt
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