traverse
path traversal
什么是路径遍历?路径遍历也称为目录遍历。这些漏洞使攻击者能够读取运行应用程序的服务器上的任意文件。这可能包括:应用程序代码和数据。后端系统的凭据。敏感的操作系统文件。在某些情况下,攻击者可能能够写入服务器上的任意文件,从而允许他们修改应用程序数据或行为,并最终完全控制服务器。如何防止路径遍历攻击防止 ......
145. Binary Tree Postorder Traversal
public List<Integer> postorderTraversal(TreeNode root) { List<Integer> list = new ArrayList<>(); if (root == null) return list; Stack<TreeNode> stack ......
144. Binary Tree Preorder Traversal
Solution 1://非递归 public List<Integer> preorderTraversal(TreeNode root) { List<Integer> result = new ArrayList<>(); if (root == null) { return result; ......
Binary Tree Level Order Traversal II
Source Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root ......
[LeetCode] 498. Diagonal Traverse 对角线遍历
题目 Given an m x n matrix mat, return an array of all the elements of the array in a diagonal order. 思考 最初在纸上写写画画试了很多想法,但都没能解决,真的。。太弱了T T。 后来在YT上看了个印度老 ......
[LeetCode] 1424. Diagonal Traverse II
Given a 2D integer array nums, return all elements of nums in diagonal order as shown in the below images. Example 1: Input: nums = [[1,2,3],[4,5,6],[ ......
@babel/traverse API文档
https://evilrecluse.top/Babel-traverse-api-doc/#/?id=api%e4%bf%a1%e6%81%af babel-handbook: https://github.com/jamiebuilds/babel-handbook/blob/master/t ......
线索二叉树(Morris Traversal)
在前面的文章中总结了二叉树的一些操作,提供了二叉树前中后的递归和非递归的实现。在非递归的实现中,基本思想是利用栈来模拟递归调用遍历的过程,本质上和递归实现没有区别,空间复杂度为\(O(n)\)。是否存在一种算法,它不使用栈也不破坏二叉树结构,但是可以完成对二叉树的遍历?即: 空间复杂度为\(O(1) ......
Binary Tree Level Order Traversal
Source Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). Example Given binary tree ......
Binary Tree Postorder Traversal
Source Given a binary tree, return the postorder traversal of its nodes' values. Example Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [3,2,1]. Challe ......
1138 Postorder Traversal
题目: Suppose that all the keys in a binary tree are distinct positive integers. Given the preorder and inorder traversal sequences, you are supposed to ......
Binary Tree Inorder Traversal
Source Given a binary tree, return the inorder traversal of its nodes' values. Example Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [1,3,2]. Challeng ......
Binary Tree Preorder Traversal
Source Given a binary tree, return the preorder traversal of its nodes' values. Note Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [1,2,3]. Example Ch ......
Binary Tree Inorder Traversal
Given the root of a binary tree, return the inorder traversal of its nodes' values. Example 1: ``` Input: root = [1,null,2,3] Output: [1,3,2] ``` Exam ......
CF1819C The Fox and the Complete Tree Traversal
# [$\color{purple}\text{The Fox and the Complete Tree Traversal}$](https://www.luogu.com.cn/problem/CF1819C) 比较有意思的一题。先考虑一个序列的权值。对长度为 $len$ 的序列排序,价值为 ......
1086 Tree Traversals Again
题目: An inorder binary tree traversal can be implemented in a non-recursive way with a stack. For example, suppose that when a 6-node binary tree (with ......
树的遍历(traversal)
Traversal一般指遍历。 所谓遍历(Traversal),是指沿着某条搜索路线,依次对树(或图)中每个节点均做一次访问。访问结点所做的操作依赖于具体的应用问题, 具体的访问操作可能是检查节点的值、更新节点的值等。不同的遍历方式,其访问节点的顺序是不一... ......
Codeforces Round 866 (Div. 1) C. The Fox and the Complete Tree Traversal (构造)
传送门 题目大意: ** 给定一个有n个点的树,我们可以任意选择一个点作为起点,这个点可以跳到跟自己距离为1或者距离为2的点,已经到达的点不能再到达(最终必须回到起点),询问是否存在一种方案可以从一个点出发经过所有的点最终再回到这个点来。** ** 输入一个整数n。紧接着输入n-1条边。** 大致思 ......
1020 Tree Traversals
Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to ou ......