非递归代码如下: 1publicArrayList<Integer> inorderTraversal(TreeNode root) { 2ArrayList<Integer> res =newArrayList<Integer>(); 3if(root ==null) 4returnres; 5LinkedList<TreeNode> stack =newLinkedList<TreeNode>(); 6while(root!=null|| !stack.isEmpty()){ 7if(root!=null){ 8stack.push(root...
* TreeNode(int x) { val = x; } * } */ import java.util.List; import java.util.ArrayList; import java.util.Stack; public class Solution { // 非递归 public List<Integer> inorderTraversal(TreeNode root) { List<Integer> list = new ArrayList<Integer>(); Stack<TreeNode> stack = new ...
private void pushAllTheLeft(Stack<TreeNode> s, TreeNode root){ s.push(root); while(root.left!=null){ root = root.left; s.push(root); } } } Binary Tree Postorder Traversal Given a binary tree, return the postorder traversal of its nodes' values. For example: Given binary tree {1,...
/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ class Solution { public int height(TreeNode root){ if(root == null) return 0; int left_height = height(root.left);...
In this case, the order of the nodes will be: 6 4 8 3 5 7 9 5. Conclusion In this article, we learned how to implement a sorted binary tree in Java, and its most common operations. The full source code for the examples is availableover on GitHub....
Java tree数据接口的json java binary tree Java实现二叉查找树(Binary Search Tree) 二叉查找树(英语:Binary Search Tree),也称二叉搜索树、有序二叉树(英语:ordered binary tree),排序二叉树(英语:sorted binary tree),是指一棵空树或者具有下列性质的二叉树:...
Given inorder and postorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. 二分法 复杂度 时间O(N^2) 空间 O(N) 思路 中序序列仍然是以根节点划分为左右两边,而后序序列的特点则是根在最后,然后在跟前面的那部分中,前面部分是左子...
Java: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 classSolution{publicList<Integer>inorderTraversal(TreeNode root){List<Integer>list=newArrayList<>();//数组if(root==null)returnlist;Stack<TreeNode>stack=newStack<>();//用数据结构栈暂存节点TreeNode cur=root;//定义当前节点while(!stack.is...
Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree [3,9,20,null,null,15,7], 代码语言:javascript 代码运行次数:0 运行 AI代码解释 ...
Visit right node\ and here is the sample code to implement this algorithm using recursion in Java: x 1 privatevoidinOrder(TreeNodenode) { 2 if(node==null) { 3 return; 4 } 5 6 inOrder(node.left); 7 System.out.printf("%s ",node.data); ...