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 thi…
Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. 题目标题:Tree 这道题目给了我们两个二叉树,让我们判断这两个二叉树是否一摸一样.利用preOrder 来遍历tree, 对于每…
二叉树的遍历分为前序.中序.后序和层序遍历四种方式 首先先定义一个二叉树的节点 //二叉树节点 public class BinaryTreeNode { private int data; private BinaryTreeNode left; private BinaryTreeNode right; public BinaryTreeNode() {} public BinaryTreeNode(int data, BinaryTreeNode left, BinaryTreeNode…
Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes v and w as the lowest node in T that has both v and w…
tree.go package tree import ( "fmt" ) type TreeNode struct { ID int Val int Left *TreeNode Right *TreeNode } func PreOrder(root *TreeNode) { if root != nil { fmt.Printf("%d ", root.Val) PreOrder(root.Left) PreOrder(root.Right) } } func…
