LC.145.Post-order Traversal Of Binary Tree https://leetcode.com/problems/binary-tree-postorder-traversal/description/ Description Implement an iterative, post-order traversal of a given binary tree, return the list of keys of each node in the tree as it is post-order traversed. Examples 5 /...
Morris Traversal (好处是,Pre-Order和In-Order代码只有很小的改动) Morris Pre-Order Traversal (LeetCode 144) (Medium) 1...If left child is null, print the current node data. Move to right child. ….Else, Make the right child of the inorder predecessor point to the current node. Two cas...
leetcode之Construct Binary Tree from Inorder and Postorder Traversal 问题 问题描述: Given inorder and postorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. 啰嗦一句,可能学过数据结构的人看到题目就知道啥意思了,给的问题介绍和...
One: Using two stacks, stack to traversal the node, stackr to record the parent node when visiting its right-child; https://oj.leetcode.com/problems/path-sum/ https://oj.leetcode.com/problems/binary-tree-postorder-traversal/
NaryTreePostorderTraversal.java 源码 package datastructure.tree.leetcode; import java.util.ArrayList; import java.util.LinkedList; import java.util.List; import java.util.Stack; /** * @author roseduan * @time 2020/9/15 10:16 下午 * @description N叉树的后序遍历 */ public class NaryTreePo...
测试地址: https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal/ """ # Definition for a binary tree node. # class TreeNode(object): # def __init__(self, x): # self.val = x # self.left = None # self.right = None class Solution(object):...
145. Binary Tree Postorder Traversal 2019-12-21 10:25 −- 后序遍历二叉树(非递归实现) [题目来源](https://leetcode.com/problems/binary-tree-postorder-traversal/) - C++代码实现 ``` class Solution { public: vector postorderTraver... ...
94. Binary Tree Inorder Traversal 2019-12-20 19:03 −- 中序遍历二叉树(非递归) 使用一个辅助栈 [题目来源](https://leetcode.com/problems/binary-tree-inorder-traversal/) - C++实现 ``` /** * Definition for a binary tree node. * stru... ...
114. 二叉树展开为链表 - 给你二叉树的根结点 root ,请你将它展开为一个单链表: * 展开后的单链表应该同样使用 TreeNode ,其中 right 子指针指向链表中下一个结点,而左子指针始终为 null 。 * 展开后的单链表应该与二叉树 先序遍历 [https://baike.baidu.com/item/%E
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? Solution: 使用两个栈,来实现; 使用一个栈来实现 1classSolution {2public:3ListNode* sortList(ListNode*head) {4if...