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Re:需要注意的是可能不存在合法的ISBN

Posted by jli114 at 2012-10-07 16:15:51 on Problem 2190
In Reply To:需要注意的是可能不存在合法的ISBN Posted by:dirtysalt at 2009-03-04 18:21:14
> RT,需要输出-1,开始没有看到,WA了一次
同意

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