代码如下: 1/**2* Definition for binary tree3* struct TreeNode {4* int val;5* TreeNode *left;6* TreeNode *right;7* TreeNode(int x) : val(x), left(NULL), right(NULL) {}8* };9*/10classSolution {11public:12vector<int> postorderTraversal(TreeNode *root) {13//IMPORTANT: Please...
vector<int> postorderTraversal(TreeNode *root) { vector<int>ans; vector<TreeNode *>stack; vector<bool>isRight; stack.push_back(root); isRight.push_back(false); TreeNode* pNode =NULL;while(!stack.empty()) {while((pNode = stack.back()) !=NULL) { pNode= pNode->left; stack.push...
原题地址:https://leetcode-cn.com/problems/n-ary-tree-postorder-traversal/ 题目描述: 给定一个 N 叉树,返回其节点值的后序遍历。 例如,给定一个 3叉树 : 返回其后序遍历: [5,6,3,2,4,1]. 说明: 递归法很简单,你可以使用迭代法完成此题吗? 来源:力扣(LeetCode) 链接:https://leetcode-cn.co...
Given a binary tree, return the postorder traversal of its nodes' values. For example: Given binary tree{1,#,2,3}, 代码语言:javascript 代码运行次数:0 1\2/3 return[3,2,1]. Note: Recursive solution is trivial, could you do it iteratively? 非递后续归遍历二叉树,肯定得用到栈。先序遍历...
1. Problem Descriptions:Given two integer arrays inorderandpostorderwhereinorderis the inorder traversal of a binary tree andpostorderis the postorder traversal of the same tree, construct and retu…
right), traversal(root.left)] return root } } return traversal(root) } 7、N叉树的后序遍历 LeetCode 第590题 我们还可以用此种算法解决N叉树的问题 var postorder = function(root) { const res = [] function traversal (root) { if (root !== null) { root.children.forEach(child => {...
Leetcode 之Binary Tree Postorder Traversal(44) 后序遍历,比先序和中序都要复杂。访问一个结点前,需要先判断其右孩子是否被访问过。如果是,则可以访问该结点;否则,需要先处理右子树。 vector<int> postorderTraversal(TreeNode *root) { vector<int>result;...
[LeetCode] 590. N-ary Tree Postorder Traversal Given an n-ary tree, return thepostordertraversal of its nodes' values. Nary-Tree input serialization is represented in their level order traversal, each group of children is separated by the null value (See examples)....
给你一棵二叉树的根节点root,返回其节点值的后序遍历。 示例1: 输入:root = [1,null,2,3] 输出:[3,2,1] 解释: 示例2: 输入:root = [1,2,3,4,5,null,8,null,null,6,7,9] 输出:[4,6,7,5,2,9,8,3,1] 解释: 示例3: 输入:root = [] ...
0103 Binary Tree Zigzag Level Order Traversal 二叉树的锯齿形层序遍历 LeetCode 力扣 Python CSDN Medium 二叉树、BFS 0105 Construct Binary Tree from Preorder and Inorder Traversal LeetCode 力扣 Python CSDN Medium 二叉树、递归 0106 Construct Binary Tree from Inorder and Postorder Traversal LeetCode 力...