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Re:请问这题有什么trap吗?应该是用面的展开做吧?

Posted by zcdln at 2006-08-18 19:31:39 on Problem 2977
In Reply To:请问这题有什么trap吗?应该是用面的展开做吧? Posted by:howie at 2006-08-18 19:19:01
我就是用面的展开做的,总是wa,不知道为什么?

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