Approach:The idea to find the sum of nodes at each level of the Tree and replace each node with the sum of nodes at that level using Level Order Traversal.Follow the steps below to solve the problem: Initialize two queues, say que1 and que2, where the sum of nodes at each level can be calculated using que1 and replace each node with the sum of all the nodes at the same level using que2. AVL tree is a self balancing binary search tree, where difference of right subtree and left subtree height to a node is at most 1.. A self-balancing binary tree is a binary tree that has some predefined structure, failing which the tree restructures itself. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview … Given a AVL tree and N values to be deleted from the tree. This difference is called the Balance Factor. That means, an AVL tree is also a binary search tree but it is a balanced tree. Given a AVL tree and N values to be inserted in the tree. Examples of Content related issues. Examples of such tree are AVL Tree, Splay Tree, Red Black Tree etc. Write a function to insert a given value into the tree. AVL Tree can be defined as height balanced binary search tree in which each node is associated with a balance factor which is calculated by subtracting the height of its right sub-tree from that of its left sub-tree. AVL tree checks the height of the left and the right sub-trees and assures that the difference is not more than 1. AVL Tree is invented by GM Adelson - Velsky and EM Landis in 1962. However, BST shown in Figure 3 is AVL tree. Example 1: ​N = 3 Values to be inserted = {5,1,4} Input: Value to be inserted = 5 Output: 5 Input : Write a function to delete a given value from the tree. AVL tree is a height-balanced binary search tree. The tree is named AVL in honour of its inventors. A binary tree is said to be balanced if, the difference between the heights of left and right subtrees of every node in the tree is either -1, 0 or +1. For example, BST shown in Figure 2 is not AVL as difference between left sub-tree and right sub-tree of node 3 is 2. For queries regarding questions and quizzes, use the comment area below respective pages. A Computer Science portal for geeks. The technique of balancing the height of binary trees was developed by Adelson, Velskii, and Landi and hence given the short form as AVL tree or Balanced Binary Tree. Software related issues. AVL tree is a binary search tree in which the difference of heights of left and right subtrees of any node is less than or equal to one. AVL/ Height Balanced Tree – AVL tree is binary search tree with additional property that difference between height of left sub-tree and right sub-tree of any node can’t be more than 1. AVL Tree. AVL trees store balance factors or heights with each node, thus requires storage for an integer per node whereas Red Black Tree requires only 1 bit of information per node. Red Black Trees are used in most of the language libraries like map, multimap, multiset in C++ whereas AVL trees are used in databases where faster retrievals are required. Example 1: Tree = 4 / \ 2 6 / \ / \ 1 3 5 7 N = 4 Values to be deleted = {4,1

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