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Animation showing the insertion of several elements into an AVL tree. It includes left, right, left-right and right-left rotations. Fig. 1: AVL tree with balance factors (green) In computer science, an AVL tree (named after inventors Adelson-Velsky and Landis) is a self-balancing binary search tree.
A double left rotation at X can be defined to be a right rotation at the right child of X followed by a left rotation at X; similarly, a double right rotation at X can be defined to be a left rotation at the left child of X followed by a right rotation at X. Tree rotations are used in a number of tree data structures such as AVL trees, red ...
AVL trees and red–black trees are two examples of binary search trees that use the left rotation. A single left rotation is done in O(1) time but is often integrated within the node insertion and deletion of binary search trees. The rotations are done to keep the cost of other methods and tree height at a minimum.
English: A table showing the 4 cases of AVL tree rebalancing using rotations. Note added regarding double rotations on 2016-05-27 Note added regarding double rotations on 2016-05-27 Date
The depth of a tree is the maximum depth of any vertex. Depth is commonly needed in the manipulation of the various self-balancing trees, AVL trees in particular. The root has depth zero, leaves have height zero, and a tree with only a single vertex (hence both a root and leaf) has depth and height zero.
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Abstract syntax tree; B-tree; Binary tree. Binary search tree. Self-balancing binary search tree. AVL tree; Red–black tree; Splay tree; T-tree; Binary space partitioning
For those that have yet to undertake the Orchard Rotation trick to master trees in FarmVille, we've got a detailed guide on how to get you started. Just be warned - once you start, this addictive ...