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小改了一下，不过应该没问题的

Posted by frkstyc at 2006-01-07 16:15:30 on Problem 2742
In Reply To:难道数据改了？ Posted by:cqf at 2006-01-07 12:12:30 
> 我的程序过了官方数据，但在ＰＫＵ上就ＷＡ了.
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