初踏武道 第237章 戮仙剑主人(2 / 2)

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定义

很多地方用森林,都是用来表示很多棵树,包括作为逻辑结构、数据结构的时候等。有一种重要的数据结构并查集就是一个有根的森林,可以很快的判断两个元素是不是属于同一个互相独立的集合,以及合并两个集合等。

逻辑结构

树也通常会用来表示逻辑结构,例如搜索树。表示逻辑结构的树一般是有根树。这种结构类似于有拓扑序的图,每个节点是其之前的节点的后继、分支、子节点等。树的结构中,每个节点之前的节点是唯一的就是说有唯一的前驱、上层容器、父节点等,另外每一个节点及其后面的部分也都是一棵树。

作为数据结构

树也是一类重要的数据结构,同时也有逻辑结构的性质,通常也是有根树。主要有搜索树和堆两种,前者的内容是按中序遍历的顺序排序的,后者每个节点的关键字都比它的子节点大或者小。复杂度一般在树的高度,也就是onogn以内。

搜索树可以快速的查找有序的内容或者新内容在已有内容中的位置,也可以进行一些和按这个顺序的范围有关的统计。

堆数据结构是一种优先队列,比搜索树功能少,通常只能很方便的求堆中关键字最小最大的数据,不能查找。当然有的时候求次小和第三小也是很方便的

很多这类数据结构会给每个点或者边加上一些别的参数。有些数据结构还会破坏本来的树的结构,但是基本还是用的树的模式,一般还是叫做“树”。

树的类型

自由树

有根树

有向树

二叉树

满二叉树

完全二叉树

ositna tree

空树

相关搜索

常见园林树木160种

树图片

树树树像

中国十大名树

树木种类大全

树简笔画

画树的图片简单又好看

树有哪些种类名字

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