https://leetcode.cn/problems/number-of-ways-to-reconstruct-a-tree 这道题曾经在周赛难度分top1呆了几年,如今已经不在难度分top5了。破局的关键是父节点的邻居数肯定不少于子节点,而根节点的邻居数一定是n-1。所以应该先找到根节点,然后逐层向下建树,子节点的邻居一定是父节点的子集,否则就是非法;如果子...
Clarification: The above format is the same as how LeetCode serializes a binary tree. You do not necessarily need to follow this format, so please be creative and come up with different approaches yourself. Note: Do not use class member/global/static variables to store states. Your serialize ...
本篇要开始坚持刷题了,从Leetcode精选面试section开始,本文是easy series题解的记录,会不断更新维护。 104. 二叉树的最大深度 + View Code 234. 回文链表:请判断一个链表是否为回文链表。 时空效率不高的解法: + View Code 优化: 237. 删除链表中的节点 请编写一个函数,使其可以删除某个链表中给定的(非末...
LeetCode Top 100 Liked Questions 236. Lowest Common Ancestor of a Binary Tree (Java版; Medium) 题目描述 Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined betw...
Count Number of Nodes in a Complete Binary Tree (Leetcode Problem Solution) Stack Coding Problems Number following the pattern Print bracket number Stock Span Problem Redundant Bracket Postfix Expression Evaluation Largest rectangle area in a histogram ...
题解 俯视角度下观察结果,我想到用root作为基准,令其序号为0,相应的,左节点在根节点基础上序号减一,而右节点加一。 用一个队列,自上而下逐层遍历。因为观察角度是从上往下,上层的节点会遮住同一列的下层所有节点。一边往下,一遍往左右两侧探索,遇到水平方向更远的
This course will teach 15 essential coding patterns like sliding window, merge interval, two pointers, etc which can be used to solved 100+ Leetcode problems and help you in real coding interviews. 9) Write a Java program to check if a number is Prime or not? (solution) A number is ...
https://leetcode.com/problems/validate-stack-sequences/ find out an element in the given sorted row and coloumn matrix. https://leetcode.com/problems/linked-list-cycle/ Top view of a binary Tree psuedo code for Topological sort Again two interviewers started from intro and explain one of yo...
0094-Binary-Tree-Inorder-Traversal 0095-Unique-Binary-Search-Trees-II 0096-Unique-Binary-Search-Trees 0098-Validate-Binary-Search-Tree 0099-Recover-Binary-Search-Tree 0100-Same-Tree 0101-Symmetric-Tree 0102-Binary-Tree-Level-Order-Traversal 0104-Maximum-Depth-of-Binary-Tr...
10 phoenix_live_view 6435 972 Elixir 54 Rich, real-time user experiences with server-rendered HTML 2025-04-11T10:16:28Z Go This is top 10, for more click Top 100 Stars in Go RankingProject NameStarsForksLanguageOpen IssuesDescriptionLast Commit 1 awesome-go 141707 12207 Go 5 A curated li...