Backend Base Java8Stream流递归树遍历 序列化与反序列化 注解与反射 Backend ElasticSearch ElasticSearch部署 ElasticSearch基础 ElasticSearch概念 Backend Collection ConcurrentHashMap HashMap死循环原因 HashMap ArrayList与LinkedList Backend MYSQL MYSQL排查问题 读写分离 分库分表做到永不迁移数据和避免热点 分库分表实战 分库分表 MYSQL的主从复制 MVCC多版本并发控制 MySQL优化建议 MySQL查出重复的记录 MySQL的七种JOIN MySQL如何被执行的 MYSQL常见问题 MYSQL基础 Backend Redis Redis工具类 跳表 布隆过滤器的实现 分布式锁对比 Redis实现分布式锁与Redisson Redis实现的分布式锁2 Redis实现的分布式锁 Redis哈希槽实战 RedisCluster Redis集群解决方案 Redis主从架构 Redis如何做到高可用 Redis的基本数据类型 Redis基础 Backend Thread CountDownLatch AQS源码分析 AbstractQueuedSynchronizer ReentrantLock Synchronized Volatile ThreadLocal 锁的分类 线程池业务中的实践 线程池 Backend Computer IO模型 为什么TCP建立连接需要三次握手 TCP的三次握手与四次挥手 计算机网络基础 Backend JVM JVM调优工具与调优实战 Java线上问题排查思路与工具 JVM之类加载与双亲委派 JVM基础 Interview Pic Solving problems from scratch Architecture Design Final Design Pattern Distributed MQ Spring Computer Redis Thread Collection Base MYSQL Interview Backend Spring 搭建SpringCloud项目 Spring与Redis通信设计结构图 Springboot自动装配原理 SpringBoot Spring循环依赖 Spring的生命周期 Spring手写实现AOP Spring的AOP Spring的IOC启动过程 Spring基础 Work JDBCBatchUpdate When to use the different log levels 输入URL页面没出现如何排查 JWT基础 表驱动法 本地jar引入到maven方式 Windows10关闭端口占用进程 js上精度丢失解决方案 Linux环境下安装svn 如何高效的使用 Git Backend MQ 消息的延时以及失效问题 如何处理消息丢失的问题 如何保证消息队列的高可用 消息的幂等性 消息的顺序性 MQ基础 Design Patterns 里氏替换原则 迪米特法则 接口分离原则 依赖倒置原则 单一原则 开闭原则 面向对象设计原则 单例模式 适配器模式 建造者模式 抽象工厂模式 简单工厂模式 工厂方法模式 创建型设计模式 UML类图 面向对象的设计过程 Linux LinuxDay3 LinuxDay2 LinuxDay1 Python PythonDay1 分布式 分布式系統接口如何避免表单的重复提交 Zookeeper实现分布式锁 TCC实例 基于rocketmq的分布式事务 分布式事务解决方案Part2 分布式事务解决方案Part1 Data Structure Sliding Window Techniques Floyd's Algorithm for Finding Duplicate Number SORT Levenshtein Distance Algorithm Mastering Coin Change with Dynamic Programming Union-Find Prefix Sum Morris Reverse LinkedList LRU LinkedList Binary Search Universal Formula Study 五门CS基础课推荐 湾区大厂程序员薪水构成level和对应期望 如何做编程知识投资及减少知识失效的影响 System Design Other 如何写一个并行调用模版 架构设计之徽服务拆分 如何设计好一个接口 手写LRU 如何实现订单主动过期释放 阿里云短信验证服务 日志的使用 如何高效对接第三方支付 如何设计一个高并发场景 图片验证码功能 xxljob分布式定时任务框架与系统的接入 如何设计一个站内消息系统？ 如何设计一个秒杀系统？ 如何设计一个短链系统？ 如何解决网站大文件上传问题？ 如何统计网站UV？ Interview System Design学习 System Design面试建议 System Design Designing a Tiny URL What happens when you type URL in your browser Algorithm Array Count Squares Zigzag Traverse Min Rewards Largest Range Subarray Sort Four Number Sum Best Seat Missing Numbers Zero Sum Subarray Merge Overlapping Intervals First Duplicate Value Array Of Products Longest Peak Spiral Traverse Monotonic Array Move Element To End SmallestDifference Three Number Sum Non-Constructible Change Tournament Winner Sorted Squared Array Validate Subsequence Two Number Sum-Easy Algorithm BST Validate Three Nodes Same BSTs Reconstruct BST Find Kth Largest Value In BST Min Height BST BST Traversal Validate Binary Search Tree BST Construction Find Closest Value In BST Algorithm Binary Trees Find Nodes Distance K Max Path Sum In Binary Tree Split Binary Tree Symmetrical Tree Merge Binary Trees Height Balanced Binary Tree Find Successor Binary Tree Diameter Invert Binary Tree Evaluate Expression Tree Node Depths Branch Sums Algorithm Graphs Boggle Board Two-Colorable Minimum Passes Of Matrix Cycle In Graph Remove Islands Youngest Common Ancestor River Sizes Breadth-first Search Single Cycle Check Depth-first Search Algorithm Sorting Radix Sort Heap Sort Quick Sort Three Number Sort Selection Sort Insertion Sort Bubble Sort Algorithm Greedy Valid Starting City Task Assignment Tandem Bicycle Class Photos Minimum Waiting Time Algorithm String Pattern Matcher Underscorify Substring Longest Substring Without Duplication One Edit Distance Minimum Characters For Words Reverse Words In String Valid IP Addresses Group Anagrams Longest Palindromic Substring Semordnilap First Non-Repeating Character Generate Document Run-Length Encoding Common Characters Caesar Cipher Encryptor Palindrome Check Algorithm Stack Reverse Polish Notation Next Greater Element Sort Stack Sunset Views Balanced Brackets Min Max Stack Construction Algorithm Searching Index Equals Value Quick Select Search For Range Shifted Binary Search Search In Sorted Matrix Find Three Largest Numbers Binary Search Algorithm LinkedLists Linked List Palindrome Zip Linked List Rearrange Linked List LRU Cache Shift Linked List Merge Linked Lists Reverse Linked List Find Loop Merging Linked Lists Sum of Linked Lists Remove Kth Node From End Middle of the Linked List Remove Duplicates From Linked List Algorithm Tries Multi String Search Suffix Trie Construction Algorithm Famous Prim’s Algorithm Kruskal's Algorithm Topological Sort Dijkstra's Algorithm Union Find Stable Internships Kadane's Algorithm Algorithm Dynamic Number Of Ways To Traverse Graph Levenshtein Distance Min Number Of Coins For Change Number Of Ways To Make Change Maximum sum of Non-adjacent nodes LeetCode Binary Search 81. Search in Rotated Sorted Array II 1539. Kth Missing Positive Number 278. First Bad Version 287. Find the Duplicate Number 786. K-th Smallest Prime Fraction 719. Find K-th Smallest Pair Distance 668. Kth Smallest Number in Multiplication Table 378. Kth Smallest Element in a Sorted Matrix 4. Median of Two Sorted Arrays 1011. Capacity To Ship Packages Within D Days 875. Koko Eating Bananas 240. Search a 2D Matrix II 74. Search a 2D Matrix 69. Sqrt(x) 852. Peak Index in a Mountain Array 162.Find Peak Element 154.Find Minimum in Rotated Sorted Array II 153.Find Minimum in Rotated Sorted Array 33.Search in Rotated Sorted Array 981.Time Based Key-Value Store 34.Search Insert Position 704.Binary Search 35.Search Insert LeetCode Array 1749. Maximum Absolute Sum of Any Subarray 1472. Design Browser History 624. Maximum Distance in Arrays 1287. Element Appearing More Than 25% In Sorted Array 1299. Replace Elements with Greatest Element on Right Side 1706. Where Will the Ball Fall 80. Remove Duplicates from Sorted Array II 2364. Count Number of Bad Pairs 59. Spiral Matrix II 922. Sort Array By Parity II 1800. Maximum Ascending Subarray Sum 3105. Longest Strictly Increasing or Strictly Decreasing Subarray 598. Range Addition II 1752. Check if Array Is Sorted and Rotated 3151. Special Array I 2661. First Completely Painted Row or Column 2239. Find Closest Number to Zero 916. Word Subsets 3042. Count Prefix and Suffix Pairs I 1408. String Matching in an Array 1769. Minimum Number of Operations to Move All Balls to Each Box 2274. Maximum Consecutive Floors Without Special Floors 2381. Shifting Letters II 2270. Number of Ways to Split Array 1366. Rank Teams by Votes 3046. Split the Array 3159. Find Occurrences of an Element in an Array 1014. Best Sightseeing Pair 2545. Sort the Students by Their Kth Score 769. Max Chunks To Make Sorted 3285. Find Indices of Stable Mountains 885. Spiral Matrix III 1338. Reduce Array Size to The Half 670. Maximum Swap 2593. Find Score of an Array After Marking All Elements 3264. Final Array State After K Multiplication Operations I 65. Valid Number 2717. Semi-Ordered Permutation 3152. Special Array II 66. Plus One 498. Diagonal Traverse 2022. Convert 1D Array Into 2D Array 766. Toeplitz Matrix 1380. Lucky Numbers in a Matrix 31.Next Permutation 973.K Closest Points to Origin 453.Minimum Moves to Equal Array Elements 215.Kth Largest Element in an Array 349.Intersection of Two Arrays 36.Valid Sudoku 242.Valid Anagram 347.Top K Frequent Elements 238.Product of Array Except Self 128.Longest Consecutive Sequence 659.Encode and Decode Strings 2357.Make Array Zero by Subtracting Equal Amounts 217.Contains Duplicate LeetCode SingleSeqTwoPointersInward 1498. Number of Subsequences That Satisfy the Given Sum Condition 1616. Split Two Strings to Make Palindrome 948. Bag of Tokens 923. 3Sum With Multiplicity 611. Valid Triangle Number LCP 28. Procurement Plan 18. 4Sum 633. Sum of Square Numbers 2824. Count Pairs Whose Sum is Less than Target 1471. The k Strongest Values in an Array 2105. Watering Plants II 344. Reverse String 1750. Minimum Length of String After Deleting Similar Ends 658. Find K Closest Elements 16. 3Sum Closest 42.Trapping Rain Water 15.3Sum 977. Squares of a Sorted Array 167. Two Sum II - Input Array Is Sorted 11.Container With Most Water 125. Valid Palindrome LeetCode HashTable 350. Intersection of Two Arrays II 3083. Existence of a Substring in a String and Its Reverse 266. Palindrome Permutation 447. Number of Boomerangs 1010. Pairs of Songs With Total Durations Divisible by 60 523. Continuous Subarray Sum 791. Custom Sort String 525. Contiguous Array 290.Word Pattern 953.Verifying an Alien Dictionary 169.Majority Element 260.Single Number III 41.First Missing Positive 49.Group Anagrams 560.Subarray Sum Equals K LeetCode LinkedList 2. Add Two Numbers 138.Copy List with Random Pointer 19.Remove Nth Node From End of List 143. Reorder List 141.Linked List Cycle 21.Merging Linked Lists 206.Reverse Linked List LeetCode Stack 2375. Construct Smallest Number From DI String 1475. Final Prices With a Special Discount in a Shop 224. Basic Calculator 636. Exclusive Time of Functions 394. Decode String 1209. Remove All Adjacent Duplicates in String II 71. Simplify Path 1047. Remove All Adjacent Duplicates In String 716.Max Stack 1249.Minimum Remove to Make Valid Parentheses 1762.Buildings With an Ocean View LevelI 227.Basic Calculator II 735.Asteroid Collision 853.Car Fleet 739.Daily Temperatures 22.Generate Parenthesesn 150.Evaluate Reverse Polish Notation 20. Valid Parentheses LeetCode SlideWindow 219. Contains Duplicate II 3298. Count Substrings That Can Be Rearranged to Contain a String II 220. Contains Duplicate III 1984. Minimum Difference Between Highest and Lowest of K Scores 3297. Count Substrings That Can Be Rearranged to Contain a String I 2269. Find the K-Beauty of a Number (Review)30. Substring with Concatenation of All Words 567.Permutation in String 438. Find All Anagrams in a String 1888. Minimum Number of Flips to Make the Binary String Alternating 2653. Sliding Subarray Beauty 2134. Minimum Swaps to Group All 1's Together II 1297. Maximum Number of Occurrences of a Substring 1652. Defuse the Bomb 1423. Maximum Points You Can Obtain from Cards 2461. Maximum Sum of Distinct Subarrays With Length K 2841. Maximum Sum of Almost Unique Subarray 1461. Check If a String Contains All Binary Codes of Size K 1052. Grumpy Bookstore Owner 2379. Minimum Recolors to Get K Consecutive Black Blocks 2090. K Radius Subarray Averages 1343. Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold 643. Maximum Average Subarray I 1456. Maximum Number of Vowels in a Substring of Given Length 122. Best Time to Buy and Sell Stock II 76. Minimum Window Substring 424. Longest Repeating Character Replacement 121. Best Time to Buy and Sell Stock LeetCode Trees 732. My Calendar III 731. My Calendar II 729. My Calendar I 1367. Linked List in Binary Tree 199.Binary Tree Right Side View 339.Nested List Weight Sum 236. Lowest Common Ancestor of a Binary Tree 297.Serialize and Deserialize Binary Tree 124.Binary Tree Maximum Path Sum 105.Construct Binary Tree from Preorder and Inorder Traversal 98.Validate Binary Search Tree 102.Binary Tree Level Order Traversal 235.Lowest Common Ancestor of a Binary Search Tree 572.Subtree of Another Tree 230.Kth Smallest Element in a BST 104.Maximum Depth of Binary Tree 226.Invert Binary Tree LeetCode Tries 212.Word Search II 211.Design Add and Search Words Data Structure 208.Implement Trie(Prefix Tree) LeetCode MathGeometry 3138. Minimum Length of Anagram Concatenation 7. Reverse Integer 50. Pow(x, n) 415. Add Strings 73.Set Matrix Zeroes 54.Spiral Matrix 48.Rotate Image LeetCode BitManipulation 371.Sum of Two Integers 268.Missing Number 190.Reverse Bits 338.Counting Bits 191.Number of 1 Bits LeetCode Greedy 45. Jump Game II 2412. Minimum Money Required Before Transactions 3066. Minimum Operations to Exceed Threshold Value II 2241. Design an ATM Machine 2182. Construct String With Repeat Limit 1792. Maximum Average Pass Ratio 2558. Take Gifts From the Richest Pile 2931. Maximum Spending After Buying Items 13. Roman to Integer 55.Jump Game 53.Maximum Subarray LeetCode Intervals 253.Meeting Rooms II 435.Non-overlapping Intervals 56.Merge Intervals 57.Insert Interval 252.Meeting Rooms LeetCode Backtracking 40. Combination Sum II 52. N-Queens II 51. N-Queens 386.Lexicographical Numbers 79.Word Search 39.Combination Sum LeetCode Graphs 261.Graph Valid Tree 207.Course Schedule 417.Pacific Atlantic Water Flow 133.Clone Graph 200.Number of Islands LeetCode Dynamic Programming 1462. Course Schedule IV (Review) 2944. Minimum Number of Coins for Fruits 2266. Count Number of Texts 1422. Maximum Score After Splitting a String 2415. Reverse Odd Levels of Binary Tree 935. Knight Dialer 5.Longest Palindromic Substring 72.Edit Distance 377.Combination Sum IV 1143.Longest Common Subsequence 62.Unique Paths 300.Longest Increasing Subsequence 139.Word Break 152.Maximum Product Subarray 322.Coin Change 91.Decode Ways 647.Palindromic Substrings 198.House Robber II 198.House Robber 70.Climbing Stairs LeetCode TwoPointers 541. Reverse String II 1930. Unique Length-3 Palindromic Subsequences 1847. Closest Room 9. Palindrome Number 1768. Merge Strings Alternately 1868. Product of Two Run-Length Encoded Arrays 986. Interval List Intersections 443. String Compression 26. Remove Duplicates from Sorted Array 88.Merge Sorted Array 680.Valid Palindrome II 528.Random Pick with Weight 75.Sort Colors 283.Move Zeroes 408.Valid Word Abbreviation Todo List Todo List LeetCode String 1980. Find Unique Binary String 1910. Remove All Occurrences of a Substring 1790. Check if One String Swap Can Make Strings Equal 2116. Check if a Parentheses String Can Be Valid 1400. Construct K Palindrome Strings 2185. Counting Words With a Given Prefix 2264. Largest 3-Same-Digit Number in String 1016. Binary String With Substrings Representing 1 To N 3019. Number of Changing Keys 2981. Find Longest Special Substring That Occurs Thrice I 38. Count and Say 468. Validate IP Address 8. String to Integer (atoi) 58. Length of Last Word 28. Find the Index of the First Occurrence in a String 434. Number of Segments in a String 14. Longest Common Prefix LeetCode Math 1524. Number of Sub-arrays With Odd Sum 1352. Product of the Last K Numbers 1742. Maximum Number of Balls in a Box 119. Pascal's Triangle II 1267. Count Servers that Communicate 1561. Maximum Number of Coins You Can Get 2017. Grid Game 2683. Neighboring Bitwise XOR 2425. Bitwise XOR of All Pairings 2429. Minimize XOR 2657. Find the Prefix Common Array of Two Arrays 3223. Minimum Length of String After Operations 2275. Largest Combination With Bitwise AND Greater Than Zero 3270. Find the Key of the Numbers 2559. Count Vowel Strings in Ranges 3280. Convert Date to Binary 1812. Determine Color of a Chessboard Square 999. Available Captures for Rook 3001. Minimum Moves to Capture The Queen 3274. Check if Two Chessboard Squares Have the Same Color LeetCode DynamicSlidingWindowCountShortest LCP 68. Beautiful Bouquet 2302. Count Subarrays With Score Less Than K 3258. Count Substrings That Satisfy K-Constraint I 713. Subarray Product Less Than K 2762. Continuous Subarrays LeetCode DFS 2658. Maximum Number of Fish in a Grid 802. Find Eventual Safe States 1387. Sort Integers by The Power Value 2872. Maximum Number of K-Divisible Components LeetCode BFS 1765. Map of Highest Peak 515. Find Largest Value in Each Tree Row 2471. Minimum Number of Operations to Sort a Binary Tree by Level LeetCode Heap 1705. Maximum Number of Eaten Apples LeetCode DynamicSlidingWindowMax (Review)1438. Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit 2781. Length of the Longest Valid Substring 2009. Minimum Number of Operations to Make Array Continuous 2555. Maximize Win From Two Segments 2271. Maximum White Tiles Covered by a Carpet 2831. Find the Longest Equal Subarray 2516. Take K of Each Character From Left and Right 1838. Frequency of the Most Frequent Element 1658. Minimum Operations to Reduce X to Zero 1004. Max Consecutive Ones III 2779. Maximum Beauty of an Array After Applying Operation 2024. Maximize the Confusion of an Exam (Review)3097. Shortest Subarray With OR at Least K II 2958. Length of Longest Subarray With at Most K Frequency 3095. Shortest Subarray With OR at Least K I 1695. Maximum Erasure Value 904. Fruit Into Baskets 1208. Get Equal Substrings Within Budget 2730. Find the Longest Semi-Repetitive Substring 1493. Longest Subarray of 1's After Deleting One Element 3090. Maximum Length Substring With Two Occurrences 3. Longest Substring Without Repeating Characters LeetCode DynamicSlidingWindowMin 1234. Replace the Substring for Balanced String (Review)2904. Shortest and Lexicographically Smallest Beautiful String 209. Minimum Size Subarray Sum LeetCode DynamicSlidingWindowCountLongest (Review)2537. Count the Number of Good Subarrays 2799. Count Complete Subarrays in an Array 3325. Count Substrings With K-Frequency Characters I 1358. Number of Substrings Containing All Three Characters 2962. Count Subarrays Where Max Element Appears at Least K Times LeetCode DynamicSlidingWindowCountExact 1248. Count Number of Nice Subarrays 930. Binary Subarrays With Sum