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AVL Tree Rotation Types Explained for Self-Balancing Binary Search Trees

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AVL Tree Rotation Types Explained for Self-Balancing Binary Search Trees

N
Neural Lantern

2 Views • May 25, 2026

Description

Hey everyone, in this video we break down the four types of rotations you need to know for AVL trees - self-balancing binary search trees.

We cover single right rotations, single left rotations, double right rotations, and double left rotations with clear diagrams and explanations of the input patterns and how they become the balanced output pattern.

If you've been learning about binary search trees and want to understand how AVL trees maintain their balance through rotations, this is the perfect next step. We look at the trinode subtrees, balance factors, and exactly how to rearrange the pointers for each case.

Great for computer science students, coding interviews, or anyone building their data structures knowledge.

Watch the full series on binary search trees and AVL trees for more.

00:00 Introduction to AVL Tree Rotations
00:14 Previous Videos Overview
00:28 Balance Factors and Trinode Subtrees
00:50 Identifying Imbalance
01:56 When to Rotate
02:20 Four Input Patterns
02:41 Target Balanced Pattern
04:18 Single Right Rotation
04:33 Single Left Rotation
08:44 Double Rotations
11:51 Remembering Rotation Types
13:04 Wrapping Up Rotations
13:27 Thanks and Outro

avl tree, avl rotations, single right rotation, single left rotation, double right rotation, double left rotation, self balancing binary search tree, binary search tree, data structures, tree rotations, avl tree tutorial, balance factor, computer science, algorithms, coding interview, bst

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