Shulou(Shulou.com)06/03 Report--

Today, I will talk to you about the structure of the tree, which may not be well understood by many people. in order to make you understand better, the editor has summarized the following content for you. I hope you can gain something according to this article.

Tree is a very important and widely used nonlinear data structure, which is a structure in which data elements are organized by branches. Tree structure exists widely in the objective world. For example, the genealogy of human society and various social organizations can be represented by tree image, and trees are also widely used in the computer field.

Tree is a very important and widely used nonlinear data structure.

Tree is an important nonlinear data structure. Intuitively, it is a structure in which data elements (called nodes in the tree) are organized by branching relations, much like trees in nature.

Brief introduction

Tree structure exists widely in the objective world, such as the genealogy of human society and all kinds of social organizations can be expressed by tree image. Trees are also widely used in the computer field, such as when compiling source programs as follows, trees can be used to represent the following syntax structure of source programs. For example, in the database system, the tree structure is also one of the important organizational forms of information. All problems with hierarchical relationships can be described by trees.

Define

A tree (tree) is a finite set of n (n > 0) elements, where:

(1) each element is called a node.

(2) there is a specific node called the root node or root (root)

(3) except for the root node, the other nodes are divided into m (m > = 0) disjoint finite sets, and each subset is a tree (called a subtree of the original tree).

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