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since the term "descendants" is used, it's assumed the trees are rooted ones. leaves are those vertices without descendants. a forest is a collection of trees.

Posted by frkstyc at 2007-03-04 13:16:48 on Problem 3206
In Reply To:一个节点是否为leaf的明确定义是什么? Posted by:thmr3191 at 2007-03-04 13:12:50


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