AVL tree: It is a self-balancing binary search tree. If the tree is not balanced, the tree performs rotation operation. LR rotation: It is called as Left Right rotation. The tree performs a single left rotation that is followed by a single right rotation.

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Chapter 26.6, Problem 26.6.3CP

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AVL tree: It is a self-balancing binary search tree. If the tree is not balanced, the tree performs rotation operation.

LR rotation: It is called as Left Right rotation. The tree performs a single left rotation that is followed by a single right rotation.

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