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Your task: Implement AVL tree in C++ Your code should include: Insert a Node Delete a Node o Search a Node o Traversals (in-order, pre-order, post-order)

Your task: Implement AVL tree in C++ Your code should include: Insert a Node Delete a Node o Search a Node o Traversals (in-order, pre-order, post-order)

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Introduction: In computer science, an AVL tree (named after inventors Adelson-Velsky and Landis) is a self- balancing binary search tree. It was the first such data structure to be invented. In an AVL tree, the heights of the two child subtrees of any node differ by at most one; if at any time they differ by more than one, rebalancing is done to restore this property. Lookup, insertion, and deletion all take O(log n) time in both the average and worst cases, where n is the number of nodes in the tree prior to the operation. Insertions and deletions may require the tree to be rebalanced by one or more tree rotations. Why AVL Trees Most of the BST operations (e.g., search, max, min, insert, delete.. etc) take O(h) time where h is the height of the BST. The cost of these operations may become O(n) for a skewed Binary tree. If we make sure that height of the tree remains O(Logn) after every insertion and deletion, then we can guarantee an upper bound of O(Logn) for all these operations. The height of an AVL tree is always O(Logn) where n is the number of nodes in the tree. Your task: Implement AVL tree in C++ Your code should include: o Insert a Node o Delete a Node Search a Node Traversals (in-order, pre-order, post-order) Copy Tree (using Copy Constructor and a function copyTree) Destroy Tree (using Destructor and a function destroy)
Transcribed Image Text:Introduction: In computer science, an AVL tree (named after inventors Adelson-Velsky and Landis) is a self- balancing binary search tree. It was the first such data structure to be invented. In an AVL tree, the heights of the two child subtrees of any node differ by at most one; if at any time they differ by more than one, rebalancing is done to restore this property. Lookup, insertion, and deletion all take O(log n) time in both the average and worst cases, where n is the number of nodes in the tree prior to the operation. Insertions and deletions may require the tree to be rebalanced by one or more tree rotations. Why AVL Trees Most of the BST operations (e.g., search, max, min, insert, delete.. etc) take O(h) time where h is the height of the BST. The cost of these operations may become O(n) for a skewed Binary tree. If we make sure that height of the tree remains O(Logn) after every insertion and deletion, then we can guarantee an upper bound of O(Logn) for all these operations. The height of an AVL tree is always O(Logn) where n is the number of nodes in the tree. Your task: Implement AVL tree in C++ Your code should include: o Insert a Node o Delete a Node Search a Node Traversals (in-order, pre-order, post-order) Copy Tree (using Copy Constructor and a function copyTree) Destroy Tree (using Destructor and a function destroy)
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