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居然PE一次就过了,有点受宠若惊^_^

Posted by TurnAround at 2009-11-16 22:39:34 on Problem 3368
看Discuss看了半天,茫茫然不知所云,硬着头皮写了个线段树,准备要WA个4,5次的,居然就这么过了。。。。

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