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Re:这题有什么陷阱？

Posted by ssq at 2006-04-06 18:20:31 on Problem 2803
In Reply To:这题有什么陷阱？ Posted by:sza at 2006-04-05 22:45:57 
没有啊，每个词，前缀只有一次，后缀也只有一次
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