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好几天了……究竟是怎样的规律呢……

Posted by HJWAJ at 2011-02-20 03:54:56 on Problem 3861 and last updated at 2011-02-24 02:39:38
In Reply To:YY了几个小时,还是WA Posted by:checkoj at 2011-02-19 21:10:30
本题一半的wa是我搞出来的……

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