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最左边的那个位置定了，其他的位置也都定了，因此只需要讨论最左边的灯要不要点，然后往下走即可了吧In Reply To:正反向各搜一次 取最小值即可 Posted by:20053565 at 2007-03-06 03:30:37 Followed by:
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