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AVL Insertion

Explore the process of inserting nodes into AVL trees and the importance of rebalancing to maintain tree height balance. Learn the key rotation cases and understand how to implement efficient insertions in C++ for balanced tree structures.

Introduction #

Insertion in AVL trees is done the same way that BST insertion is done. However, when a node is inserted into a BST, it usually becomes unbalanced, i.e., the tree has a node that has a left-right subtree height difference greater than 1. So, AVL trees have to be rebalanced after insertion, unlike BSTs. To rebalance the tree, we need to perform a ‘rotation’, but before going deep, let’s look at AVL tree rebalancing case-by-case.

Let’s look at the terms that we will ...