Before we consider the question of tree manipulation, let's consider the data structure we'll use to define each node of the tree.
在考虑树操作问题之前，让我们来看看将用于定义树的各个节点的数据结构。
Before we consider the question of tree manipulation, let's consider the data structure we'll use to define each node of the tree.
在考虑树操作问题之前，让我们来看看将用于定义树的各个节点的数据结构。
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