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感觉O(n2）够呛。。。

Posted by raofr at 2005-08-12 18:37:43 on Problem 2559
In Reply To:时间负责度是多少才能通过? Posted by:wangguanjin at 2005-08-12 17:19:29

感觉O(n2）够呛。。。
至少我做的是

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