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Re:求上海预赛A题的trick以及可以ac的做法

Posted by xxxxx_xxxx_u at 2009-09-21 19:18:14
In Reply To:Re:求上海预赛A题的trick以及可以ac的做法 Posted by:Siyao at 2009-09-21 19:15:32
> 我也来帖一下推导……
> http://hi.baidu.com/5l2_/blog/item/dd3834163cdfb35bf3de3237.html

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