AVL Trees Lab 11: AVL Trees.

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Presentation transcript:

AVL Trees Lab 11: AVL Trees

AVL Trees Self-Balancing Search Trees In 1962 G.M. Adel'son-Vel'skiî and E.M. Landis developed a self-balancing tree. The tree is known by their initials: AVL. The AVL tree algorithm keeps track of the difference in height of each subtree. As items are added to or removed from a tree, the balance of each subtree from the insertion or removal point up to the root is updated. BalanceFactor = height(right-subtree) – height(left-subtree) The absolute difference between the left sub tree and right sub tree is never greater than 1. If the balance gets out of the range -1 to +1, the tree is rotated to bring it back into range.

Lab 03 - Iterator