Deletion in Binary Search Tree
Explore the detailed process of deleting nodes in a Binary Search Tree. Learn to handle different cases like deleting leaf nodes, nodes with one child, and nodes with two children. Understand the algorithms to maintain tree structure after deletion through clear explanations and C++ examples.
Introduction #
In this lesson, we are going to study how a node is deleted in a BST. In general, to delete a node in a BST, you will search for it, and once found, you’ll free the space taken by that node and you will reallocate its left and right subtree (if present). However, to make things simpler, we’ve identified four possible cases involved in BST node deletion. We’ll tackle each one separately.
- Deleting in an empty tree
- Deleting a node with no