TreeNode temp=stack.pop(); req.add(temp.val); root= temp.right;//最重要的一步} }returnreq; } } 参考链接: http://www.programcreek.com/2012/12/leetcode-solution-of-binary-tree-inorder-traversal-in-java/
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...
Here is our complete solution of the InOrder traversal algorithm in Java. This program uses a recursive algorithm to print the value of all nodes of a binary tree usingInOrdertraversal. As I have told you before, during in-order traversal, the value of left subtree is printed first, follow...
If you want to practice data structure and algorithm programs, you can go through 100+ java coding interview questions. 1. Introduction This article provides a detailed exploration of the Level Order traversal technique in binary trees, focusing on its implementation in Java. 2. What is Level Or...
题目描述(中等难度) 二叉树的中序遍历。 解法一 递归学二叉树的时候,必学的算法。用递归写简洁明了,就不多说了。 public List<Integer> inorderTraversal(TreeNode root) { List<Integer> ans = n…
94. Binary Tree Inorder Traversal 题目描述 Given a binary tree, return theinorder For example: Given binary tree [1,null,2,3], 1 \ 2 / 3 return [1,3,2]. Note: 思路 本题的目的是将一个二叉树结构进行中序遍历输出...
94. Binary Tree Inorder Traversal 两种解法,递归和迭代 Memory分别是6.1和5.7,速度好像是一样的。。 Recursive class Solution { public: vector<int>res; void in_order(TreeNode* root) { if (!root)return; in_order(root->left); res.push_back(root->val);...
名字叫做, morrois traversal, 自己写了下: My code: /** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */publicclassSolution{publicList<Integer>inorderTraversal(TreeNoderoot){List...
描述 Given preorder and inorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. 先序和中序、后序和中序可以唯一确定一棵二叉树 时间复杂度O(n),空间复杂度O(logn) // TreeNode.javapublicclassTreeNode{publicTreeNodeleft;publicTree...
Binary tree traversal: Preorder, Inorder, and Postorder In order to illustrate few of the binary tree traversals, let us consider the below binary tree: Preorder traversal: To traverse a binary tree in Preorder, following operations are carried-out (i) Visit the root, (ii) Traverse the le...