Given a binary tree, return thepostordertraversal of its nodes' values. Example: [1,null,2,3] [3,2,1] Follow up: Recursive solution is trivial, could you do it iteratively? 分析: 给定一棵二叉树,返回后序遍历。 递归方法很简单,即先访问左子树,再访问右子树,最后访问根节点。但题目说了你能...
145. Binary Tree Postorder Traversal Total Accepted:96378Total Submissions:271797Difficulty:Hard 提交网址:https://leetcode.com/problems/binary-tree-postorder-traversal/ Given a binary tree, return thepostordertraversal of its nodes' values. For example: Given binary tree{1,#,2,3}, 1 \ 2 / 3...
题目地址:https://leetcode.com/problems/n-ary-tree-postorder-traversal/description/ 题目描述 Given an n-ary tree, return the postorder traversal of its nodes’ values. For example, given a 3-ary tree: Return its postorder traversal as: [5,6,3,2,4,1]. Note: Recursive solution is trivial...
PAT(甲级)1138.Postorder Traversal(25) PAT 1138.Postorder Traversal(25) Suppose that all the keys in a binary tree are distinct positive integers. Given the preorder and inorder traversal sequences, you are supposed to output the first num......
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;...
Additionally, the inorder_index dictionary requires O(n) space, as it stores the index of each value in the inorder traversal list. Overall, the space usage is proportional to the number of nodes in the tree. 编辑于 2024-03-28 17:50・波兰 力扣(LeetCode) 算法 Python...
Here is source code of the C Program to Build Binary Tree if Inorder or Postorder Traversal as Input. The C program is successfully compiled and run on a Linux system. The program output is also shown below. /* * C Program to Build Binary Tree if Inorder or Postorder Traversal as Inpu...
二叉树的后序遍历 分析 基础题型。 后序遍历:对一颗二叉树及其子树的遍历顺序为,左子树->右子树->根节点; 递归法/使用栈; 写法可对比参考中序遍历、先序遍历,尤其是先序 V3 & V5、中序 V3、后序 V4 的遍历思路; 代码 python defpostorderTraversal(root):""" ...
今天介绍的是LeetCode算法题中Easy级别的第136题(顺位题号是590)。给定一个n-ary树,返回其节点值的后序遍历。例如,给定一个3-ary树: 1 / | \ 3 2 4 / \ 5 6 其后序遍历结果为:[5,6,3,2,4,1]。 注意:递归解决方案是微不足道的,你可以用迭代的方式做吗? 本次解题使用的开发工具是eclipse,jd...
Schreiben Sie bei einem gegebenen Binärbaum eine iterative und rekursive Lösung, um den Baum mit Postorder-Traversal in C++, Java und Python zu durchlaufen.