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...
import java.util.Stack; public class Binary_Tree_Postorder_Traversal { public static class TreeNode { int val; TreeNode left; TreeNode right; TreeNode(int x) { val = x; } } public static void main(String[] args) { TreeNode r1 = new TreeNode(1); TreeNode r2 = new TreeNode(2);...
Can you solve this real interview question? Binary Tree Postorder Traversal - Given the root of a binary tree, return the postorder traversal of its nodes' values. Example 1: Input: root = [1,null,2,3] Output: [3,2,1] Explanation: [https://assets
Binary Tree Postorder Traversal Given a binary tree, return the postorder traversal of its nodes’ values. Example: Input: [1,null,2,3] 1 \ 2 / 3 Output: [3,2,1] 解析 树的后序遍历,方法类似于前序和中序。 解法1:递归 解法2:...猜...
Binary Tree Postorder Traversal 题目描述 给定一个二叉树,返回它的 后序 遍历。 LeetCode145. Binary Tree Postorder Traversal 示例: 输入: [1,null,2,3] 输出: [3,2,1] 进阶: 递归算法很简单,你可以通过迭代算法完成吗? Java 实现 Iterative So......
此题来自leetcode https://oj.leetcode.com/problems/binary-tree-postorder-traversal/ 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 复制 1\2/3
private void pushAllTheLeft(Stack<TreeNode> s, TreeNode root){ s.push(root); while(root.left!=null){ root = root.left; s.push(root); } } } Binary Tree Postorder Traversal Given a binary tree, return the postorder traversal of its nodes' values. ...
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 145 binary tree postorder traversal 二叉树的后序遍历顺序为,root->left, root->right, root,因此需要保存根节点的状态。显然使用栈来模拟递归的过程,但是难点是怎么从root->right转换到root。 对于节点p可以分情况讨论 1. p如果是叶子节点,直接输出 2. p如果有孩子,且孩子没有被访问过,则按照右孩...
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…