Problem Statement Given a binary search tree and a node in it, find the in-order successor of that node in the BST. Sample Test Case Problem Solution A node’s inorder successor is node with least value in its right subtree i.e. its right subtree’s left most child. If right subtree of the node doesn’t exists, …
Problem Statement Given the root of a binary search tree with distinct values, modify it so that every node has a new value equal to the sum of the values of the original tree that are greater than or equal to node.val. As a reminder, a binary search tree is a tree that satisfies these constraints: The left subtree of a node …
Problem Statement Given an array where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never differ by more than 1. Sample Test Case Problem Solution Since …
Binary Search Tree Binary Search Tree is a special type of binary tree that has a specific order of elements in it. Every node in a binary search tree has a unique value. As it is a binary tree, each tree node has maximum of two children. A Binary Search Tree is used to search …
Trim a Binary Search Tree Given a binary search tree and the lowest and highest boundaries as L and R, trim the tree so that all its elements lies in [L, R] (R >= L). You might need to change the root of the tree, so the result should return the new root of the …
Range Sum of BST Link Given the root node of a binary search tree, return the sum of values of all nodes with value between L and R (inclusive). The binary search tree is guaranteed to have unique values. Example 1: Input: root = [10,5,15,3,7,null,18], L = 7, R = 15 Output: 32 Example 2: …
Convert BST to Greater Tree Link Given a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST is changed to the original key plus sum of all keys greater than the original key in BST. Example: Input: The root of a Binary Search Tree like this: …
Closest Binary Search Tree Value Link Given a non-empty binary search tree and a target value, find the value in the BST that is closest to the target. Note: Given target value is a floating point. You are guaranteed to have only one unique value in the BST that is closest to the target. Example: …
Lowest Common Ancestor of a Binary Search Tree Link Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes p and q as the lowest node in T that …
Given a Binary Search Tree (BST) with the root node root, return the minimum difference between the values of any two different nodes in the tree.
