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什么含义？能仔细说说吗？

Posted by Bluebird at 2005-08-28 16:28:05 on Problem 2594
In Reply To:这个不是最小路径覆盖!这个一个结点可以属于多条路径的啊-_- Posted by:animate at 2005-08-28 16:26:18 
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