Trees consist of nodes with parent and child relationships from "summary" of Data Structures and Algorithms in Python by Michael T. Goodrich,Roberto Tamassia,Michael H. Goldwasser
In a tree data structure, each element is called a node, and each node has a parent node and zero or more children nodes. The topmost node in a tree is called the root node, which has no parent. Nodes that have the same parent are called siblings. The root node serves as a common starting point for traversing the tree, and each child node is connected to its parent via a single edge. The nodes that do not have any children are called leaf nodes, while internal nodes have one or more children. The relationship between parent and child nodes forms the hierarchical structure of a tree, with each child node having a unique parent. This structure allows for efficient organization and retrieval of data, as well as easy navigation through the tree. By following the parent-child relationships, one can travers...
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