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四次方不是正解吧，不要枚举起点，用两次dp，n^2*b就可以了。In Reply To:这个题目时间太少了，改成10s吧，我在zju那边用10s过了 Posted by:mathzqy at 2004-07-27 09:50:57 > rt Followed by: Post your reply here: |
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