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 / \ 3 8 / \ \ 1 4 11 Post-order trave...
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/
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...
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 postorderTravers... 尚修能的技术博客 0 170 94. Binary Tree Inorder Traversal 2019-12-20 19:03 − -...
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... ...
Post-Order: 先访问其左右子树,再中间。对每一个subtree,同样适用。 image.png Pre-Order Traversal 三种解法: Recursive Iterate 用Stack 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) ...
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...
* TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * };*/classSolution {public: vector<int> postorderTraversal(TreeNode*root) { vector<int>ret;if(!root)returnret; stack<TreeNode *>sta; sta.push(root);while( !sta.empty() ){ ...
preorderTraversal(result, root.right); } public void postorderTraversal(List<Integer> result, TreeNode root){ if(root==null) return; postorderTraversal(result, root.left); postorderTraversal(result, root.right); result.add(root.val);
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. * str... 尚修能的技术博客 0 88 145. Binary ...