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可恶啊啊啊

Posted by 200730690105 at 2009-03-28 22:54:56 on Problem 2606
以前一直不敢做这题,以为只有O(n^2logn)才能过,但又写不好出来,谁知正式比赛又遇到了,还是不敢做,最后听别人说O(n^3)也能过,试着写了一次,结果一次就ac了...

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