Problem DescriptionGiven preorder and inorder traversal of a tree, construct the binary tree.Note:You may assume that duplicates do not exist in the tree.For example, givenpreorder = [3,9,20,15,7] ino
Problem DescriptionTwo elements of a binary search tree (BST) are swapped by mistake.Recover the tree without changing its structure.Example 1Input: [1,3,null,null,2] 1 / 3 \ 2 Output: [3,1,null
Problem DescriptionGiven two binary trees, write a function to check if they are the same or not.Two binary trees are considered the same if they are structurally identical and the nodes have the same
Problem DescriptionGiven n, how many structurally unique BST's (binary search trees) that store values 1 ... n?ExampleInput: 3 Output: 5 Explanation: Given n = 3, there are a total of 5 unique BST's:
0094 Binary Tree Inorder TraversalProblem DescriptionGiven a binary tree, return the inorder traversal of its nodes' values.ExampleInput: [1,null,2,3] 1 \ 2 / 3 Output: [1,3,2]SolutionPlease refer th
IntroductionIn computer science, a binary search tree (BST), also called an ordered or sorted binary tree, is a rooted binary tree whose internal nodes each store a key greater than all the keys in th
0097 Interleaving StringProblem DescriptionGiven s1, s2, s3, find whether s3 is formed by the interleaving of s1 and s2.Example 1:Input: s1 = "aabcc", s2 = "dbbca", s3 = "aadbbcbcac" Output: trueExamp