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Re:建议你去做Ditch,USACO的数据通常比较强.....

Posted by frkstyc at 2005-05-07 14:17:36 on Problem 1459
In Reply To:建议你去做Ditch,USACO的数据通常比较强..... Posted by:palmtenor at 2005-05-07 14:16:55 
ditch是什么？
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