[LeetCode] All questions numbers conclusion 所有题目题号
2018-08-07 00:50 Johnson_强生仔仔 阅读(516) 评论(0) 编辑 收藏 举报Note: 后面数字n表明刷的第n + 1遍, 如果题目有**, 表明有待总结
Conclusion questions:
[LeetCode] questions conclustion_BFS, DFS
LeetCode questions conclustion_Path in Tree
[LeetCode] questions conlusion_InOrder, PreOrder, PostOrder traversal
[LeetCode] questions for Dynamic Programming
[LeetCode] questions conclusion_ Binary Search
Morris Traversal_ O(1) space to change binary tree to linked list
Directed Graph Loop detection and if not have, path to print all path.
quickSort use two pointers to decrease Time into O(n * lgn ) or O(n)
Questions:
[LeetCode] 733. Flood Fill_Easy tag: BFS 2
[LeetCode] 690. Employee Importance_Easy tag: BFS 2
[LeetCode] 529. Minesweeper_ Medium_ tag: BFS 2
[Leetcode] 863. All Nodes Distance K in Binary Tree_ Medium tag: BFS, Amazon 1
[LeetCode] 199. Binary Tree Right Side View_ Medium tag: BFS, Amazon 2
[LeetCode] 200. Number of Islands_ Medium tag: BFS 2
[LeetCode] 102. Binary Tree Level Order Traversal_Medium tag: BFS 2
[LeetCode] 127. Word Ladder _Medium tag: BFS 2
[LeetCode] 675. Cut Off Trees for Golf Event_Hard tag: BFS 2
[LeetCode] 133. Clone Graph_ Medium tag: BFS, DFS 2
[LeetCode] 207 Course Schedule_Medium tag: BFS, DFS 2
[LeetCode] 103. Binary Tree Zigzag Level Order Traversal _ Medium tag: BFS 2
[LeetCode] 101. Symmetric Tree_ Easy tag: BFS 1
[LeetCode] 513. Find Bottom Left Tree Value_ Medium tag: BFS 2
[LeetCode] 261. Graph Valid Tree _ Medium tag: BFS 2
[LeetCode] 286. Walls and Gates_Medium tag: BFS 2
[LeetCode] 785. Is Graph Bipartite?_Medium tag: DFS, BFS 2
[LeetCode] 210. Course Schedule II 2
[LeetCode] 301. Remove Invalid Parentheses_Hard tag:BFS 2
[LeetCode] 104. Maximum Depth of Binary Tree_Easy tag: DFS 4
[LeetCode] 827. Making A Large Island 2
[LeetCode] 694. Number of Distinct Islands 2
[LeetCode] 711. Number of Distinct Islands II_hard tag: DFS 2
[LeetCode] 851. Loud and Rich_ Medium tag: DFS 1
[LeetCode] 112. Path Sum_Easy tag: DFS 2
[LeetCode] 114. Flatten Binary Tree to Linked List_Medium tag: DFS 2
[LeetCode] 257. Binary Tree Paths_ Easy tag: DFS 3
[LeetCode] 198. House Robber _Easy tag: Dynamic Programming 2
[LeetCode] 221. Maximal Square _ Medium Tag: Dynamic Programming 2
[LeetCode] 437. Path Sum III_ Easy tag: DFS 2
[LeetCode] 124. Binary Tree Maximum Path Sum_ Hard tag: DFS recursive, Divide and conquer 2
[LeetCode] 687. Longest Univalue Path_Easy tag: DFS recursive 2
[LeetCode] 298. Binary Tree Longest Consecutive Sequence_Medium tag: DFS recursive 3
[LeetCode] 549. Binary Tree Longest Consecutive Sequence II_ Medium tag: DFS recursive 2
[LeetCode] 721. Accounts Merge_Medium tag: DFS recursive . 1
[LeetCode] 394. Decode String_Medium tag: stack 666 1
[LeetCode] 62. Unique Paths_ Medium tag: Dynamic Programming
[LeetCode] 64. Minimum Path Sum_Medium tag: Dynamic Programming
[LeetCode] 72. Edit Distance_hard tag: Dynamic Programming 1
[LeetCode] 161. One Edit Distance_Medium
[LeetCode]94, 144, 145 Binary Tree InOrder, PreOrder, PostOrder Traversal_Medium 3
[LeetCode] 589. N-ary Tree Preorder Traversal_Easy 3
[LeetCode] 429. N-ary Tree Level Order Traversal_ Easy 2
[LeetCode] 590. N-ary Tree Postorder Traversal_Easy 2
[LeetCode] 98. Validate Binary Search Tree_Medium 3
[LeetCode] 230. Kth Smallest Element in a BST_Medium tag: Inorder Traversal 2
[LeetCode] 285. Inorder Successor in BST_Medium tag: Inorder Traversal 1
[LeetCode] 105. Construct Binary Tree from Preorder and Inorder Traversal_Medium tag: Tree Traversal 1
[LeetCode] 255. Verify Preorder Sequence in Binary Search Tree_Medium tag: Preorder Traversal, tree 1
[LeetCode] 331. Verify Preorder Serialization of a Binary Tree_Medium tag: stack 1
[LeetCode] 329. Longest Increasing Path in a Matrix_Hard tag: Dynamic Programming, DFS, Memoization
[LintCode] 394. Coins in a Line_ Medium tag:Dynamic Programming_博弈
[LintCode] 395. Coins in a Line 2_Medium tag: Dynamic Programming, 博弈
[LeetCode] 42. Trapping Rain Water_hard tag: Two Pointers
[LeetCode] 877. Stone Game == [LintCode] 396. Coins in a Line 3_hard tag: 区间Dynamic Programming, 博弈
[LeetCode] 312. Burst Balloons_hard tag: 区间Dynamic Programming
[LeetCode] 53. Maximum Subarray_Easy tag: Dynamic Programming
[LeetCode] 152. Maximum Product Subarray_Medium tag: Dynamic Programming
[LeetCode] 674. Longest Continuous Increasing Subsequence_Easy Dynamic Programming
[LeetCode] 121. Best Time to Buy and Sell Stock_Easy tag: Dynamic Programming
[LeetCode] 122. Best Time to Buy and Sell Stock II_Easy tag: Dynamic Programming
[LeetCode] 111. Minimum Depth of Binary Tree_Easy tag:DFS 1
[LeetCode] 110. Balanced Binary Tree_Easy tag: DFS 3
[LeetCode] 100. Same Tree_Easy tag: DFS 3
[LeetCode] 99. Recover Binary Search Tree 2
[LeetCode] 130. Surrounded Regions_Medium tag: DFS/BFS 2
[LeetCode] 695. Max Area of Island_Medium tag: DFS/BFS 1
[LeetCode] 129. Sum Root to Leaf Numbers_Medium tag: DFS 3
[LeetCode] 490. The Maze_Medium tag: BFS/DFS 1
[LeetCode] 787. Cheapest Flights Within K Stops_Medium tag: Dynamic Programming, BFS, Heap
[LeetCode] 310. Minimum Height Trees_Medium tag: BFS
[LeetCode] 559. Maximum Depth of N-ary Tree_Easy tag: DFS . 1
[LeetCode] 1. Two Sum_Easy tag: Hash Table 1
[LeetCode] 292. Nim Game_Easy tag: Math
[LeetCode] 458. Poor Pigs_Easy tag: Math
[LeetCode] 237. Delete Node in a Linked List_Easy tag: Linked List
[LeetCode] 195. Tenth Line_Easy tag: Bash
[LeetCode] 595. Big Countries_Easy tag: SQL
[LeetCode] 561. Array Partition I_Easy tag: Sort
[LeetCode] 38. Count and Say_Easy
[LeetCode] 193. Valid Phone Numbers_Easy tag: Bash
[LeetCode] 258. Add Digits_Easy tag: Math
[LeetCode] 88. Merge Sorted Array_Easy tag: Two Pointers
[LeetCode] 176. Second Highest Salary_Easy tag: SQL
[LeetCode] 557. Reverse Words in a String III_Easy tag: String
[LeetCode] 67. Add Binary_Easy tag: String
[LeetCode] 415. Add Strings_Easy tag: String
[LeetCode] 443. String Compression_Easy tag:String
[LeetCode] 697. Degree of an Array_Easy tag: Hash Table
[LeetCode] 627. Swap Salary_Easy tag: SQL
[LeetCode] 69. Sqrt(x)_Easy tag: Binary Search
[LeetCode] 680. Valid Palindrome II_Easy tag: Two Pointers
[LeetCode] 717. 1-bit and 2-bit Characters_Easy
[LeetCode] 804. Unique Morse Code Words_Easy tag: Hash Table
[LeetCode] 438. Find All Anagrams in a String_Easy
[LeetCode] 628. Maximum Product of Three Numbers_Easy
[LeetCode] 339. Nested List Weight Sum_Easy tag:DFS
[LeetCode] 364. Nested List Weight Sum II_Medium tag:DFS
[LeetCode] 724. Find Pivot Index_Easy tag: Dynamic Programming
[LeetCode] 232. Implement Queue using Stacks_Easy tag: Design
[LeetCode] 252. Meeting Rooms_Easy tag: Sort
[LeetCode] 181. Employees Earning More Than Their Managers_Easy tag: SQL
[LeetCode] 172. Factorial Trailing Zeroes_Easy tag: Math
[LeetCode] 243. Shortest Word Distance_Easy
[LeetCode] 190. Reverse Bits_Easy tag: Bit Manipulation
[LeetCode] 832. Flipping an Image_Easy
[LeetCode] 196. Delete Duplicate Emails_Easy tag: SQL
[LeetCode] 345. Reverse Vowels of a String_Easy tag:Two Pointers
[LeetCode] 836. Rectangle Overlap_Easy
[LeetCode] 168. Excel Sheet Column Title_Easy tag: Math
[LeetCode] 796. Rotate String_Easy **KMP
[LeetCode] 821. Shortest Distance to a Character_Easy tag: BFS
[LeetCode] 183. Customers Who Never Order_Easy tag: SQL
[LeetCode] 605. Can Place Flowers_Easy
[LeetCode] 532. K-diff Pairs in an Array_Easy tag: Hash Table
[LeetCode] 225. Implement Stack using Queues_Easy tag: Design
[LeetCode] 496. Next Greater Element I_Easy tag: Stack
[LeetCode] 197. Rising Temperature_Easy tag: SQL
[LeetCode] 728. Self Dividing Numbers_Easy tag: Math
[LeetCode] 844. Backspace String Compare_Easy tag: Stack **Two pointers
[LeetCode] 476. Number Complement_Easy tag: Bit Manipulation
[LeetCode] 182. Duplicate Emails_Easy tag: SQL
[LeetCode] 58. Length of Last Word_Easy tag: String
[LeetCode] 867. Transpose Matrix_Easy
[LeetCode] 441. Arranging Coins_Easy tag: Math
[LeetCode] 643. Maximum Average Subarray I_Easy tag: Dynamic Programming(Sliding windows)
[LeetCode] 566. Reshape the Matrix_Easy
[LeetCode] 884. Uncommon Words from Two Sentences_Easy tag: Hash Table
[LeetCode] 455. Assign Cookies_Easy tag: Sort
[LeetCode] 849. Maximize Distance to Closest Person_Easy tag: BFS
[LeetCode] 581. Shortest Unsorted Continuous Subarray_Easy tag: Sort, Stack
[LeetCode] 709. To Lower Case_Easy
[LeetCode] 696. Count Binary Substrings_Easy
[LeetCode] 414. Third Maximum Number_Easy
[LeetCode] 744. Find Smallest Letter Greater Than Target_Easy tag: Binary Search
[LeetCode] 596. Classes More Than 5 Students_Easy tag:SQL
[LeetCode] 824. Goat Latin_Easy
[LeetCode] 586. Customer Placing the Largest Number of Orders_Easy tag;SQL
[LeetCode] 830. Positions of Large Groups_Easy tag: Two Pointers
[LeetCode] 504. Base 7_Easy tag: Math
[LeetCode] 408. Valid Word Abbreviation_Easy
[LeetCode] 620. Not Boring Movies_Easy tag: SQL
[LeetCode] 788. Rotated Digits_Easy tag: **Dynamic Programming
[LeetCode] 876. Middle of the Linked List_Easy tag: Linked List ** slow, fast pointers
[LeetCode] 859. Buddy Strings_Easy
[LeetCode] 860. Lemonade Change_Easy tag: Greedy
[LeetCode] 577. Employee Bonus_Easy tag: SQL
[LeetCode] 868. Binary Gap_Easy
[LeetCode] 367. Valid Perfect Square_Easy tag:Math
[LeetCode] 20. Valid Parentheses_Easy tag: Stack
[LeetCode] 661. Image Smoother_Easy
[LeetCode] 598. Range Addition II_Easy tag: Math
[LeetCode] 872. Leaf-Similar Trees_Easy tag: DFS
[LeetCode] 434. Number of Segments in a String_Easy
[LeetCode] 693. Binary Number with Alternating Bits_Easy
[LeetCode] 762. Prime Number of Set Bits in Binary Representation_Easy
[LeetCode] 276. Paint Fence_Easy tag: Dynamic Programming
[LeetCode] 405. Convert a Number to Hexadecimal_Easy tag: Bit Manipulation
[LeetCode] 840. Magic Squares In Grid_Easy
[LeetCode] 747. Largest Number At Least Twice of Others_Easy
[LeetCode] 506. Relative Ranks_Easy tag: Sort
[LeetCode] 607. Sales Person_Easy tag: SQL
[LeetCode] 603. Consecutive Available Seats_Easy tag: SQL
[LeetCode] 584. Find Customer Referee_Easy tag: SQL
[LeetCode] 619. Biggest Single Number_Easy tag: SQL
[LeetCode] 492. Construct the Rectangle_Easy tag: Math
[LeetCode] 422. Valid Word Square_Easy
[LeetCode] 613. Shortest Distance in a Line_Easy tag: SQL
[LeetCode] 610. Triangle Judgement_Easy tag: SQL
[LeetCode] 704. Binary Search_Easy tag: Binary Search 3
[LeetCode] 374. Guess Number Higher or Lower_Easy tag: Binary Search 3
LeetCode] 35. Search Insert Position_Easy tag: Binary Search 3
[LeetCode] 278. First Bad Version_Easy tag: Binary Search 2
[LeetCode] 162. Find Peak Element(852. Peak Index in a Mountain Array)_Medium tag: Binary Search 3
[LeetCode] 74. Search a 2D Matrix_Medium tag: Binary Search 3
[LeetCode] 240. Search a 2D Matrix II_Medium tag: Binary Search 2
[LeetCode] 69. Sqrt(x)_Easy tag: Binary Search 2
[LeetCode] 153. Find Minimum in Rotated Sorted Array_Medium tag: Binary Search 3
[LeetCode] 154. Find Minimum in Rotated Sorted Array II_Hard 1
[LeetCode] 78. Subsets tag: backtracking 1
[LeetCode] 90.Subsets II tag: backtracking 1
[LeetCode] 33. Search in Rotated Sorted Array_Medium tag: Binary Search 1
[LeetCode] 702. Search in a Sorted Array of Unknown Size_Medium tag: Binary Search . 1
[LeetCode] 236. Lowest Common Ancestor of a Binary Tree_ Medium tag: DFS, Divide and conquer 1
[LeetCode] 120. Triangle _Medium tag: Dynamic Programming . 1
[LeetCode] 63. Unique Paths II_ Medium tag: Dynamic Programming . 1
[LeetCode] 70. Climbing Stairs_ Easy tag: Dynamic Programming . 1
[LeetCode] 55. Jump Game_ Medium tag: Dynamic Programming . 1
[LeetCode] 45. Jump Game II_ Hard tag: Dynamic Programming, Greedy . 1
[LeetCode] 132. Palindrome Partitioning II_ Hard tag: Dynamic Programming . 1
[LeetCode] 139. Word Break_ Medium tag: Dynamic Programming 1
[LeetCode] 1143. Longest common subsequences_ Medium tag: Dynamic Programming . 1
[LeetCode] 115. Distinct Subsequences_ Hard tag: Dynamic Programming . 1
[LeetCode] 97. Interleaving String_ Hard tag: Dynamic Programming . 1
[LeetCode] 206. Reverse Linked List_Easy tag: Linked List 1
[LeetCode] 83. Remove Duplicates from Sorted List_Easy tag: Linked List . 1
[LeetCode] 82. Remove Duplicates from Sorted List II_Medium tag: Linked List . 1
[LeetCode] 92. Reverse Linked List II_Medium tag: Linked List 1
[LeetCode] 86. Partition List_Medium tag: Linked List 1
[LeetCode] 876. Middle of the Linked List_Easy tag: Linked List
[LeetCode] 21. Merge Two Sorted Lists_Easy tag: Linked List 1
[LeetCode] 148. Sort List_Middle tag: Linked List
[LeetCode] 143. Reorder List_Middle tag: Linked List
[LeetCode] 23. Merge k Sorted Lists_Hard tag: Linked List 1
[LeetCode] 138. Copy List with Random Pointer_Medium tag: Linked List 1
[LeetCode] 109. Convert Sorted List to Binary Search Tree_Medium tag: Linked List 1
[LeetCode] 234. Palindrome Linked List_Easy tag: Linked List 1
[LeetCode] 189. Rotate Array_Easy tag: Array 1
[LeetCode] 4. Median of Two Sorted Arrays_Hard tag: Array, Binary Search . 1
[LeetCode] 15. 3Sum_Medium tag: Array
[LeetCode] 75. Sort Colors_Medium tag: Two pointers
[LeetCode] 155. Min Stack_Easy tag: stack
[LeetCode] 232. Implement Queue using Stacks_Easy tag: stack
[LeetCode] 84. Largest Rectangle in Histogram_Hard tag: stack
[LeetCode] 654. Maximum Binary Tree_Medium tag: stack
[LeetCode] 128. Longest Consecutive Sequence_Hard tag: Hash
[LeetCode] 146. LRU Cache_Hard tag: Hash, Linked List
[LeetCode] 46. Permutations_Medium tag: DFS, backtracking 1
[LeetCode] 47. Permutations II_Medium tag: DFS, backtracking 1
[LeetCode] 51. N-Queens_Hard tag: DFS, backtracking 1
[LeetCode] 52. N-QueensII_Hard tag: DFS, backtracking
[LeetCode] 131. Palindrome Partitioning_Medium tag: DFS, backtracking, Palindrome 1
[LeetCode] 40. Combination Sum II_Medium tag: backtracking 1
[LeetCode] 39. Combination Sum_Medium tag: backtracking 1
[LeetCode] 126. Word Ladder II_Hard tag: BFS&DFS
[LeetCode] 167. Two Sum II - Input array is sorted_Easy tag: Hash/Two pointers
[LeetCode] 611. Valid Triangle Number_Medium tag: Two pointers
[LeetCode] 16. 3Sum Closest_Medium tag: Array, Two pointers
[LeetCode] 407. Trapping Rain Water II_hard tag: Heap
[LeetCode] 295. Find Median from Data Stream_hard tag: Heap Need to update the follow up question?
[LeetCode] 239. Sliding Window Maximum_Hard tag: deque
[LeetCode] 87. Scramble String_hard tag: 区间Dynamic Programming?
[LeetCode] 416. Partition Equal Subset Sum_Medium tag: backpack . 1
[LeetCode] 322. Coin Change_Medium tag: backpack
[LeetCode] 93. Restore IP Addresses_Medium tag: backtracking
[LeetCode] 17. Letter Combinations of a Phone Number_Medium tag: backtracking 1
[LeetCode] 154. Find Minimum in Rotated Sorted Array II_Hard tag: not real binary search anymore
[LeetCode] 81. Search in Rotated Sorted Array II_Medium tag: not real binary search anymore
[LeetCode] 150. Evaluate Reverse Polish Notation_Medium tag: Stack
[LeetCode] 224. Basic Calculator_Hard tag: stack
[LeetCode] 173. Binary Search Tree Iterator_Medium_tag: Binary Search Tree
[LeetCode] 700. Search in a Binary Search Treer_Easy_tag: Binary Search Tree
[LeetCode] 701. Insert into a Binary Search Tree_Medium_tag: Binary Search Tree
[LeetCode] 784. Letter Case Permutation_Medium tag: backtracking
[LeetCode] 812. Largest Triangle Area_Easy tag: math
[LeetCode] 22. Generate Parentheses_Medium tag: backtracking
[LeetCode] 36. Valid Sudoku_Medium tag: Array
[LeetCode] 37. Sudoku Solver_Hard tag: BackTracking
[LeetCode] 1485. Clone Binary Tree With Random Pointer_ Medium tag: BFS, DFS
[LeetCode] 560.Subarray Sum Equals K_Medium tag: Array, Subarray, prefix Sum
[LeetCode] 215. Kth Largest Element in an Array_Medium tag: Array, Heap
[LeetCode] 347. Top K Frequent Elements_Medium tag: Array, Heap
[LeetCode] 703. Kth Largest Element in a Stream_Easy tag: Heap
[LeetCode] 208. Implement Trie (Prefix Tree)_Medium tag: Trie
[LeetCode] 212. Word Search II_Hard tag: Trie, DFS
[LeetCode] 642. Design Search Autocomplete System_Hard tag: Trie
[LeetCode] 211. Design Add and Search Words Data Structure_Medium tag: Trie, DFS
[LeetCode] 77. Combinations_Medium tag: backtracking
[LeetCode]2. Add Two Numbers_Medium tag: Linked List
[LeetCode] 79. Word Search_Medium tag: Backtracking, DFS
[LeetCode] 5. Longest Palindromic Substring _Medium tag: Two pointers
[LeetCode] 25. Reverse Nodes in k-Group_Hard tag: Linked List
[Leetcode] 543. Diameter of Binary Tree_Easy Tag: DFS
[LeetCode] 56. Merge Intervals_Medium Tag: sort
[LeetCode] 973. K Closest Points to Origin_Medium tag: Sort
[LeetCode] 252. Meeting Rooms_Easy tag: Sort
[LeetCode] 253. Meeting Rooms II_Medium tag: Heap
[LeetCode] 763. Partition Labels_Medium Tag: sort
[LeetCode] 957. Prison Cells After N Days_Medium Tag: Array
[LeetCode] 297. Serialize and Deserialize Binary Tree_hard tag: DFS, Divide and Conquer
[LeetCode] 428. Serialize and Deserialize N-ary Tree_hard tag: DFS, Divide and Conquer
[LeetCode] 895. Maximum Frequency Stack_Hard tag: stack
[LeetCode]348. Design Tic-Tac-Toe_Medium tag: array
[LeetCode] 684. Redundant Connection _ Medium tag: Union Find
[LeetCode] 929. Unique Email Addresses_Easy tag: Hash
[LeetCode] 82. License Key Formatting_Easy tag: String
[LeetCode] 904. Fruit Into Baskets_Medium tag: Two pointers
[LeetCode] 975. Odd Even Jump_Hard tag: stack, dynamic programming
[LeetCode] 3. Longest Substring Without Repeating Characters_Medium tag: two pointers
[LeetCode] 11. Container With Most Water_Medium tag: two pointers
[LeetCode] 31. Next Permutation_Medium tag: sort, two pointers
[LeetCode] 43. Multiply Strings_Medium tag: string
[LeetCode] 48. Rotate Image_Medium tag: array
[LeetCode] 66. Plus One_Easy tag: array
[LeetCode] 76. Minimum Window Substring_Hard tag: two pointers
[LeetCode] 157. Read N Characters Given Read4_Easy tag: array
[LeetCode] 158. Read N Characters Given Read4 II - Call multiple times_Hard tag: array, queue
[LeetCode] 159. Longest Substring with At Most Two Distinct Characters_Medium tag: Two pointers
[LeetCode] 163. Missing Ranges_Easy tag: array
[LeetCode] 681. Next Closest Time_Medium tag: array, sort
[LeetCode] 809. Expressive Words_Medium tag: array, two pointers
[LeetCode] 833. Find And Replace in String_Medium tag: array
[LeetCode] 849. Maximize Distance to Closest Person_Medium tag: BFS, array
[LeetCode] 857. Minimum Cost to Hire K Workers_Hard tag: sort, heap
[LeetCode] 222. Count Complete Tree Nodes_Medium tag: Binary search
[LeetCode] 399. Evaluate Division_Medium tag: DFS
[LeetCode] 489. Robot Room Cleaner_Hard tag: DFS, backtracking
[LeetCode] 951. Flip Equivalent Binary Trees_Medium tag: DFS, divide and conquer
[LeetCode] 663. Equal Tree Partition_Medium tag: DFS, divide and conquer
[LeetCode] 289. Game of Life_Medium tag: array
[LeetCode] 766. Toeplitz Matrix_Easy tag: array
[LeetCode] 54. Spiral Matrix_Medium tag: array, DFS
[LeetCode] 59. Spiral Matrix II_Medium tag: array, DFS
[LeetCode] 259. 3Sum Smaller_Medium tag: Two pointers
[LeetCode] 382. Linked List Random Node_Medium tag: linked list, math
[LeetCode] 85. Maximal Rectangle_Hard tag: Dynamic Programming
[LeetCode] 2334. Subarray With Elements Greater Than Varying Threshold_Hard tag: dp, stack
[LeetCode] 1944. Number of Visible People in a Queue_Hard tag: stack
[LeetCode] 2282. Number of People That Can Be Seen in a Grid_Medium tag: stack.
[LeetCode] 2434. Using a Robot to Print the Lexicographically Smallest String_Medium tag: stack
[LeetCode] 2863. Maximum Length of Semi-Decreasing Subarrays_Medium tag: stack
