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...
* TreeNode(int x) : val(x), left(NULL), right(NULL) {} * };*/classSolution {public: vector<int> postorderTraversal(TreeNode*root) { vector<int>ret; stack<TreeNode *>sta; TreeNode*curr =root;while( !sta.empty() ||curr ) {if(curr) { sta.push(curr); curr= curr->left; }...
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...
*/classSolution{public List<Integer>preorderTraversal(TreeNode root){List<Integer>result=newLinkedList<>();TreeNode current=root;TreeNode prev=null;while(current!=null){if(current.left==null){result.add(current.val);current=current.right;}else{// has left, then find the rightmost of left su...
LeetCode 987. Vertical Order Traversal of a Binary Tree 2019-12-10 07:55 −原题链接在这里:https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree/ 题目: Given a binary tree, return the vertical order traversa...
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 86 145. Binary ...
力扣算法题—145BinartTreePostorderTraversal 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;...
Morris post order traversal algorithm Sept. 5, 2015 花时间把代码读明白, 比光看书强. 动手写代码, 改代码, 兴趣是最好的老师. 多记几个例子, 增加情趣. 举个例子关于中序遍历, 4 / \ 2 6 / \ / \ 1 3 5 7 easy way to travel is to remember the order of its position in the horizontal...
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 postorderTravers... ...
LeetCode 987. Vertical Order Traversal of a Binary Tree 2019-12-10 07:55 −原题链接在这里:https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree/ 题目: Given a binary tree, return the vertical order traversa...