leetcode/

easy 717 / 717 (100.00%)  |  medium 436 / 1516 (28.76%)  |  hard 18 / 629 (2.86%)

• 1. Two Sum (easy)  |  Go
• 2. Add Two Numbers (medium)  |  Go
• 3. Longest Substring Without Repeating Characters (medium)  |  Go
• 4. Median of Two Sorted Arrays (hard)  |  Go
• 5. Longest Palindromic Substring (medium)  |  Go
• 6. Zigzag Conversion (medium)  |  Go
• 7. Reverse Integer (medium)  |  Go
• 8. String to Integer (atoi) (medium)  |  Go
• 9. Palindrome Number (easy)  |  Go
• 11. Container With Most Water (medium)  |  Go
• 12. Integer to Roman (medium)  |  Go
• 13. Roman to Integer (easy)  |  Go
• 14. Longest Common Prefix (easy)  |  Go
• 15. 3Sum (medium)  |  Go
• 16. 3Sum Closest (medium)  |  Go
• 17. Letter Combinations of a Phone Number (medium)  |  Go
• 18. 4Sum (medium)  |  Go
• 19. Remove Nth Node From End of List (medium)  |  Go
• 20. Valid Parentheses (easy)  |  Go
• 21. Merge Two Sorted Lists (easy)  |  Go
• 22. Generate Parentheses (medium)  |  Go
• 23. Merge k Sorted Lists (hard)  |  Go
• 24. Swap Nodes in Pairs (medium)  |  Go
• 25. Reverse Nodes in k-Group (hard)  |  Go
• 26. Remove Duplicates from Sorted Array (easy)  |  Go
• 27. Remove Element (easy)  |  Go
• 28. Find the Index of the First Occurrence in a String (easy)  |  Go
• 29. Divide Two Integers (medium)  |  Go
• 31. Next Permutation (medium)  |  Go
• 33. Search in Rotated Sorted Array (medium)  |  Go
• 34. Find First and Last Position of Element in Sorted Array (medium)  |  Go
• 35. Search Insert Position (easy)  |  Go
• 36. Valid Sudoku (medium)  |  Go
• 37. Sudoku Solver (hard)  |  Go
• 38. Count and Say (medium)  |  Go
• 39. Combination Sum (medium)  |  Go
• 40. Combination Sum II (medium)  |  Go
• 41. First Missing Positive (hard)  |  Go
• 43. Multiply Strings (medium)  |  Go
• 45. Jump Game II (medium)  |  Go
• 46. Permutations (medium)  |  Go
• 47. Permutations II (medium)  |  Go
• 48. Rotate Image (medium)  |  Go
• 49. Group Anagrams (medium)  |  Go
• 50. Pow(x, n) (medium)  |  Go
• 51. N-Queens (hard)  |  Go
• 52. N-Queens II (hard)  |  Go
• 53. Maximum Subarray (medium)  |  Go
• 54. Spiral Matrix (medium)  |  Go
• 55. Jump Game (medium)  |  Go
• 56. Merge Intervals (medium)  |  Go
• 57. Insert Interval (medium)  |  Go
• 58. Length of Last Word (easy)  |  Go
• 59. Spiral Matrix II (medium)  |  Go
• 60. Permutation Sequence (hard)  |  Go
• 61. Rotate List (medium)  |  Go
• 62. Unique Paths (medium)  |  Go
• 63. Unique Paths II (medium)  |  Go
• 64. Minimum Path Sum (medium)  |  Go
• 65. Valid Number (hard)  |  Go
• 66. Plus One (easy)  |  Go
• 67. Add Binary (easy)  |  Go
• 68. Text Justification (hard)  |  Go
• 69. Sqrt(x) (easy)  |  Go
• 70. Climbing Stairs (easy)  |  Go
• 71. Simplify Path (medium)  |  Go
• 73. Set Matrix Zeroes (medium)  |  Go
• 74. Search a 2D Matrix (medium)  |  Go
• 75. Sort Colors (medium)  |  Go
• 77. Combinations (medium)  |  Go
• 78. Subsets (medium)  |  Go
• 79. Word Search (medium)  |  Go
• 80. Remove Duplicates from Sorted Array II (medium)  |  Go
• 81. Search in Rotated Sorted Array II (medium)  |  Go
• 82. Remove Duplicates from Sorted List II (medium)  |  Go
• 83. Remove Duplicates from Sorted List (easy)  |  Go
• 86. Partition List (medium)  |  Go
• 88. Merge Sorted Array (easy)  |  Go
• 91. Decode Ways (medium)  |  Go
• 92. Reverse Linked List II (medium)  |  Go
• 93. Restore IP Addresses (medium)  |  Go
• 94. Binary Tree Inorder Traversal (easy)  |  Go
• 95. Unique Binary Search Trees II (medium)  |  Go
• 96. Unique Binary Search Trees (medium)  |  Go
• 98. Validate Binary Search Tree (medium)  |  Go
• 100. Same Tree (easy)  |  Go
• 101. Symmetric Tree (easy)  |  Go
• 102. Binary Tree Level Order Traversal (medium)  |  Go
• 103. Binary Tree Zigzag Level Order Traversal (medium)  |  Go
• 104. Maximum Depth of Binary Tree (easy)  |  Go
• 105. Construct Binary Tree from Preorder and Inorder Traversal (medium)  |  Go
• 106. Construct Binary Tree from Inorder and Postorder Traversal (medium)  |  Go
• 107. Binary Tree Level Order Traversal II (medium)  |  Go
• 108. Convert Sorted Array to Binary Search Tree (easy)  |  Go
• 109. Convert Sorted List to Binary Search Tree (medium)  |  Go
• 110. Balanced Binary Tree (easy)  |  Go
• 111. Minimum Depth of Binary Tree (easy)  |  Go
• 112. Path Sum (easy)  |  Go
• 113. Path Sum II (medium)  |  Go
• 114. Flatten Binary Tree to Linked List (medium)  |  Go
• 116. Populating Next Right Pointers in Each Node (medium)  |  Go
• 117. Populating Next Right Pointers in Each Node II (medium)  |  Go
• 118. Pascal's Triangle (easy)  |  Go
• 119. Pascal's Triangle II (easy)  |  Go
• 120. Triangle (medium)  |  Go
• 121. Best Time to Buy and Sell Stock (easy)  |  Go
• 125. Valid Palindrome (easy)  |  Go
• 128. Longest Consecutive Sequence (medium)  |  Go
• 129. Sum Root to Leaf Numbers (medium)  |  Go
• 130. Surrounded Regions (medium)  |  Go
• 131. Palindrome Partitioning (medium)  |  Go
• 133. Clone Graph (medium)  |  Go
• 134. Gas Station (medium)  |  Go
• 136. Single Number (easy)  |  Go
• 138. Copy List with Random Pointer (medium)  |  Go
• 141. Linked List Cycle (easy)  |  Go
• 142. Linked List Cycle II (medium)  |  Go
• 143. Reorder List (medium)  |  Go
• 144. Binary Tree Preorder Traversal (easy)  |  Go
• 145. Binary Tree Postorder Traversal (easy)  |  Go
• 146. LRU Cache (medium)  |  Go
• 147. Insertion Sort List (medium)  |  Go
• 148. Sort List (medium)  |  Go
• 149. Max Points on a Line (hard)  |  Go
• 150. Evaluate Reverse Polish Notation (medium)  |  Go
• 151. Reverse Words in a String (medium)  |  Go
• 155. Min Stack (medium)  |  Go
• 157. Read N Characters Given Read4 (easy)  |  Go
• 160. Intersection of Two Linked Lists (easy)  |  Go
• 163. Missing Ranges (easy)  |  Go
• 165. Compare Version Numbers (medium)  |  Go
• 167. Two Sum II - Input Array Is Sorted (medium)  |  Go
• 168. Excel Sheet Column Title (easy)  |  Go
• 169. Majority Element (easy)  |  Go
• 170. Two Sum III - Data structure design (easy)  |  Go
• 171. Excel Sheet Column Number (easy)  |  Go
• 173. Binary Search Tree Iterator (medium)  |  Go
• 175. Combine Two Tables (easy)  |  SQL
• 176. Second Highest Salary (medium)  |  SQL
• 179. Largest Number (medium)  |  Go
• 181. Employees Earning More Than Their Managers (easy)  |  SQL
• 182. Duplicate Emails (easy)  |  SQL
• 183. Customers Who Never Order (easy)  |  SQL
• 186. Reverse Words in a String II (medium)  |  Go
• 187. Repeated DNA Sequences (medium)  |  Go
• 189. Rotate Array (medium)  |  Go
• 190. Reverse Bits (easy)  |  Go
• 191. Number of 1 Bits (easy)  |  Go
• 193. Valid Phone Numbers (easy)  |  Bash
• 195. Tenth Line (easy)  |  Bash
• 196. Delete Duplicate Emails (easy)  |  SQL
• 197. Rising Temperature (easy)  |  SQL
• 198. House Robber (medium)  |  Go
• 199. Binary Tree Right Side View (medium)  |  Go
• 200. Number of Islands (medium)  |  Go
• 201. Bitwise AND of Numbers Range (medium)  |  Go
• 202. Happy Number (easy)  |  Go
• 203. Remove Linked List Elements (easy)  |  Go
• 204. Count Primes (medium)  |  Go
• 205. Isomorphic Strings (easy)  |  Go
• 206. Reverse Linked List (easy)  |  Go
• 208. Implement Trie (Prefix Tree) (medium)  |  Go
• 211. Design Add and Search Words Data Structure (medium)  |  Go
• 213. House Robber II (medium)  |  Go
• 215. Kth Largest Element in an Array (medium)  |  Go
• 216. Combination Sum III (medium)  |  Go
• 217. Contains Duplicate (easy)  |  Go
• 219. Contains Duplicate II (easy)  |  Go
• 222. Count Complete Tree Nodes (easy)  |  Go
• 223. Rectangle Area (medium)  |  Go
• 224. Basic Calculator (hard)  |  Go
• 225. Implement Stack using Queues (easy)  |  Go
• 226. Invert Binary Tree (easy)  |  Go
• 227. Basic Calculator II (medium)  |  Go
• 228. Summary Ranges (easy)  |  Go
• 230. Kth Smallest Element in a BST (medium)  |  Go
• 231. Power of Two (easy)  |  Go
• 232. Implement Queue using Stacks (easy)  |  Go
• 234. Palindrome Linked List (easy)  |  Go
• 235. Lowest Common Ancestor of a Binary Search Tree (medium)  |  Go
• 236. Lowest Common Ancestor of a Binary Tree (medium)  |  Go
• 237. Delete Node in a Linked List (medium)  |  Go
• 238. Product of Array Except Self (medium)  |  Go
• 240. Search a 2D Matrix II (medium)  |  Go
• 242. Valid Anagram (easy)  |  Go
• 243. Shortest Word Distance (easy)  |  Go
• 245. Shortest Word Distance III (medium)  |  Go
• 246. Strobogrammatic Number (easy)  |  Go
• 251. Flatten 2D Vector (medium)  |  Go
• 252. Meeting Rooms (easy)  |  Go
• 257. Binary Tree Paths (easy)  |  Go
• 258. Add Digits (easy)  |  Go
• 263. Ugly Number (easy)  |  Go
• 266. Palindrome Permutation (easy)  |  Go
• 268. Missing Number (easy)  |  Go
• 270. Closest Binary Search Tree Value (easy)  |  Go
• 271. Encode and Decode Strings (medium)  |  Go
• 278. First Bad Version (easy)  |  Go
• 281. Zigzag Iterator (medium)  |  Go
• 283. Move Zeroes (easy)  |  Go
• 284. Peeking Iterator (medium)  |  Go
• 286. Walls and Gates (medium)  |  Go
• 287. Find the Duplicate Number (medium)  |  Go
• 290. Word Pattern (easy)  |  Go
• 292. Nim Game (easy)  |  Go
• 293. Flip Game (easy)  |  Go
• 297. Serialize and Deserialize Binary Tree (hard)  |  Go
• 298. Binary Tree Longest Consecutive Sequence (medium)  |  Go
• 300. Longest Increasing Subsequence (medium)  |  Go
• 303. Range Sum Query - Immutable (easy)  |  Go
• 307. Range Sum Query - Mutable (medium)  |  Go
• 314. Binary Tree Vertical Order Traversal (medium)  |  Go
• 322. Coin Change (medium)  |  Go
• 323. Number of Connected Components in an Undirected Graph (medium)  |  Go
• 326. Power of Three (easy)  |  Go
• 328. Odd Even Linked List (medium)  |  Go
• 331. Verify Preorder Serialization of a Binary Tree (medium)  |  Go
• 334. Increasing Triplet Subsequence (medium)  |  Go
• 338. Counting Bits (easy)  |  Go
• 339. Nested List Weight Sum (medium)  |  Go
• 340. Longest Substring with At Most K Distinct Characters (medium)  |  Go
• 341. Flatten Nested List Iterator (medium)  |  Go
• 342. Power of Four (easy)  |  Go
• 344. Reverse String (easy)  |  Go
• 345. Reverse Vowels of a String (easy)  |  Go
• 346. Moving Average from Data Stream (easy)  |  Go
• 347. Top K Frequent Elements (medium)  |  Go
• 348. Design Tic-Tac-Toe (medium)  |  Go
• 349. Intersection of Two Arrays (easy)  |  Go
• 350. Intersection of Two Arrays II (easy)  |  Go
• 353. Design Snake Game (medium)  |  Go
• 355. Design Twitter (medium)  |  Go
• 359. Logger Rate Limiter (easy)  |  Go
• 362. Design Hit Counter (medium)  |  Go
• 366. Find Leaves of Binary Tree (medium)  |  Go
• 367. Valid Perfect Square (easy)  |  Go
• 369. Plus One Linked List (medium)  |  Go
• 374. Guess Number Higher or Lower (easy)  |  Go
• 377. Combination Sum IV (medium)  |  Go
• 379. Design Phone Directory (medium)  |  Go
• 380. Insert Delete GetRandom O(1) (medium)  |  Go
• 382. Linked List Random Node (medium)  |  Go
• 383. Ransom Note (easy)  |  Go
• 384. Shuffle an Array (medium)  |  Go
• 385. Mini Parser (medium)  |  Go
• 386. Lexicographical Numbers (medium)  |  Go
• 387. First Unique Character in a String (easy)  |  Go
• 388. Longest Absolute File Path (medium)  |  Go
• 389. Find the Difference (easy)  |  Go
• 392. Is Subsequence (easy)  |  Go
• 393. UTF-8 Validation (medium)  |  Go
• 394. Decode String (medium)  |  Go
• 398. Random Pick Index (medium)  |  Go
• 401. Binary Watch (easy)  |  Go
• 404. Sum of Left Leaves (easy)  |  Go
• 405. Convert a Number to Hexadecimal (easy)  |  Go
• 408. Valid Word Abbreviation (easy)  |  Go
• 409. Longest Palindrome (easy)  |  Go
• 412. Fizz Buzz (easy)  |  Go
• 413. Arithmetic Slices (medium)  |  Go
• 414. Third Maximum Number (easy)  |  Go
• 415. Add Strings (easy)  |  Go
• 419. Battleships in a Board (medium)  |  Go
• 422. Valid Word Square (easy)  |  Go
• 426. Convert Binary Search Tree to Sorted Doubly Linked List (medium)  |  Go
• 427. Construct Quad Tree (medium)  |  Go
• 429. N-ary Tree Level Order Traversal (medium)  |  Go
• 430. Flatten a Multilevel Doubly Linked List (medium)  |  Go
• 434. Number of Segments in a String (easy)  |  Go
• 438. Find All Anagrams in a String (medium)  |  Go
• 439. Ternary Expression Parser (medium)  |  Go
• 441. Arranging Coins (easy)  |  Go
• 442. Find All Duplicates in an Array (medium)  |  Go
• 443. String Compression (medium)  |  Go
• 445. Add Two Numbers II (medium)  |  Go
• 448. Find All Numbers Disappeared in an Array (easy)  |  Go
• 449. Serialize and Deserialize BST (medium)  |  Go
• 450. Delete Node in a BST (medium)  |  Go
• 451. Sort Characters By Frequency (medium)  |  Go
• 452. Minimum Number of Arrows to Burst Balloons (medium)  |  Go
• 454. 4Sum II (medium)  |  Go
• 455. Assign Cookies (easy)  |  Go
• 459. Repeated Substring Pattern (easy)  |  Go
• 461. Hamming Distance (easy)  |  Go
• 463. Island Perimeter (easy)  |  Go
• 468. Validate IP Address (medium)  |  Go
• 476. Number Complement (easy)  |  Go
• 482. License Key Formatting (easy)  |  Go
• 485. Max Consecutive Ones (easy)  |  Go
• 490. The Maze (medium)  |  Go
• 491. Non-decreasing Subsequences (medium)  |  Go
• 492. Construct the Rectangle (easy)  |  Go
• 495. Teemo Attacking (easy)  |  Go
• 496. Next Greater Element I (easy)  |  Go
• 497. Random Point in Non-overlapping Rectangles (medium)  |  Go
• 498. Diagonal Traverse (medium)  |  Go
• 500. Keyboard Row (easy)  |  Go
• 501. Find Mode in Binary Search Tree (easy)  |  Go
• 504. Base 7 (easy)  |  Go
• 506. Relative Ranks (easy)  |  Go
• 507. Perfect Number (easy)  |  Go
• 509. Fibonacci Number (easy)  |  Go
• 511. Game Play Analysis I (easy)  |  SQL
• 512. Game Play Analysis II (easy)  |  SQL
• 520. Detect Capital (easy)  |  Go
• 521. Longest Uncommon Subsequence I (easy)  |  Go
• 525. Contiguous Array (medium)  |  Go
• 528. Random Pick with Weight (medium)  |  Go
• 530. Minimum Absolute Difference in BST (easy)  |  Go
• 532. K-diff Pairs in an Array (medium)  |  Go
• 535. Encode and Decode TinyURL (medium)  |  Go
• 536. Construct Binary Tree from String (medium)  |  Go
• 538. Convert BST to Greater Tree (medium)  |  Go
• 539. Minimum Time Difference (medium)  |  Go
• 540. Single Element in a Sorted Array (medium)  |  Go
• 541. Reverse String II (easy)  |  Go
• 543. Diameter of Binary Tree (easy)  |  Go
• 547. Number of Provinces (medium)  |  Go
• 551. Student Attendance Record I (easy)  |  Go
• 557. Reverse Words in a String III (easy)  |  Go
• 559. Maximum Depth of N-ary Tree (easy)  |  Go
• 560. Subarray Sum Equals K (medium)  |  Go
• 561. Array Partition (easy)  |  Go
• 563. Binary Tree Tilt (easy)  |  Go
• 566. Reshape the Matrix (easy)  |  Go
• 567. Permutation in String (medium)  |  Go
• 572. Subtree of Another Tree (easy)  |  Go
• 575. Distribute Candies (easy)  |  Go
• 577. Employee Bonus (easy)  |  SQL
• 583. Delete Operation for Two Strings (medium)  |  Go
• 584. Find Customer Referee (easy)  |  SQL
• 586. Customer Placing the Largest Number of Orders (easy)  |  SQL
• 589. N-ary Tree Preorder Traversal (easy)  |  Go
• 590. N-ary Tree Postorder Traversal (easy)  |  Go
• 592. Fraction Addition and Subtraction (medium)  |  Go
• 593. Valid Square (medium)  |  Go
• 594. Longest Harmonious Subsequence (easy)  |  Go
• 595. Big Countries (easy)  |  SQL
• 596. Classes More Than 5 Students (easy)  |  SQL
• 597. Friend Requests I: Overall Acceptance Rate (easy)  |  SQL
• 598. Range Addition II (easy)  |  Go
• 599. Minimum Index Sum of Two Lists (easy)  |  Go
• 603. Consecutive Available Seats (easy)  |  SQL
• 604. Design Compressed String Iterator (easy)  |  Go
• 605. Can Place Flowers (easy)  |  Go
• 606. Construct String from Binary Tree (easy)  |  Go
• 607. Sales Person (easy)  |  SQL
• 608. Tree Node (medium)  |  SQL
• 610. Triangle Judgement (easy)  |  SQL
• 613. Shortest Distance in a Line (easy)  |  SQL
• 617. Merge Two Binary Trees (easy)  |  Go
• 619. Biggest Single Number (easy)  |  SQL
• 620. Not Boring Movies (easy)  |  SQL
• 622. Design Circular Queue (medium)  |  Go
• 623. Add One Row to Tree (medium)  |  Go
• 627. Swap Salary (easy)  |  SQL
• 628. Maximum Product of Three Numbers (easy)  |  Go
• 635. Design Log Storage System (medium)  |  Go
• 637. Average of Levels in Binary Tree (easy)  |  Go
• 640. Solve the Equation (medium)  |  Go
• 641. Design Circular Deque (medium)  |  Go
• 643. Maximum Average Subarray I (easy)  |  Go
• 645. Set Mismatch (easy)  |  Go
• 648. Replace Words (medium)  |  Go
• 649. Dota2 Senate (medium)  |  Go
• 653. Two Sum IV - Input is a BST (easy)  |  Go
• 654. Maximum Binary Tree (medium)  |  Go
• 655. Print Binary Tree (medium)  |  Go
• 657. Robot Return to Origin (easy)  |  Go
• 659. Split Array into Consecutive Subsequences (medium)  |  Go
• 661. Image Smoother (easy)  |  Go
• 669. Trim a Binary Search Tree (medium)  |  Go
• 671. Second Minimum Node In a Binary Tree (easy)  |  Go
• 674. Longest Continuous Increasing Subsequence (easy)  |  Go
• 680. Valid Palindrome II (easy)  |  Go
• 682. Baseball Game (easy)  |  Go
• 692. Top K Frequent Words (medium)  |  Go
• 693. Binary Number with Alternating Bits (easy)  |  Go
• 694. Number of Distinct Islands (medium)  |  Go
• 695. Max Area of Island (medium)  |  Go
• 696. Count Binary Substrings (easy)  |  Go
• 697. Degree of an Array (easy)  |  Go
• 700. Search in a Binary Search Tree (easy)  |  Go
• 701. Insert into a Binary Search Tree (medium)  |  Go
• 703. Kth Largest Element in a Stream (easy)  |  Go
• 704. Binary Search (easy)  |  Go
• 705. Design HashSet (easy)  |  Go
• 706. Design HashMap (easy)  |  Go
• 707. Design Linked List (medium)  |  Go
• 709. To Lower Case (easy)  |  Go
• 717. 1-bit and 2-bit Characters (easy)  |  Go
• 722. Remove Comments (medium)  |  Go
• 723. Candy Crush (medium)  |  Go
• 724. Find Pivot Index (easy)  |  Go
• 725. Split Linked List in Parts (medium)  |  Go
• 728. Self Dividing Numbers (easy)  |  Go
• 729. My Calendar I (medium)  |  Go
• 731. My Calendar II (medium)  |  Go
• 733. Flood Fill (easy)  |  Go
• 734. Sentence Similarity (easy)  |  Go
• 735. Asteroid Collision (medium)  |  Go
• 737. Sentence Similarity II (medium)  |  Go
• 738. Monotone Increasing Digits (medium)  |  Go
• 739. Daily Temperatures (medium)  |  Go
• 743. Network Delay Time (medium)  |  Go
• 744. Find Smallest Letter Greater Than Target (easy)  |  Go
• 746. Min Cost Climbing Stairs (easy)  |  Go
• 747. Largest Number At Least Twice of Others (easy)  |  Go
• 748. Shortest Completing Word (easy)  |  Go
• 760. Find Anagram Mappings (easy)  |  Go
• 762. Prime Number of Set Bits in Binary Representation (easy)  |  Go
• 766. Toeplitz Matrix (easy)  |  Go
• 771. Jewels and Stones (easy)  |  Go
• 783. Minimum Distance Between BST Nodes (easy)  |  Go
• 784. Letter Case Permutation (medium)  |  Go
• 796. Rotate String (easy)  |  Go
• 797. All Paths From Source to Target (medium)  |  Go
• 800. Similar RGB Color (easy)  |  Go
• 804. Unique Morse Code Words (easy)  |  Go
• 806. Number of Lines To Write String (easy)  |  Go
• 807. Max Increase to Keep City Skyline (medium)  |  Go
• 811. Subdomain Visit Count (medium)  |  Go
• 812. Largest Triangle Area (easy)  |  Go
• 814. Binary Tree Pruning (medium)  |  Go
• 817. Linked List Components (medium)  |  Go
• 819. Most Common Word (easy)  |  Go
• 821. Shortest Distance to a Character (easy)  |  Go
• 824. Goat Latin (easy)  |  Go
• 830. Positions of Large Groups (easy)  |  Go
• 831. Masking Personal Information (medium)  |  Go
• 832. Flipping an Image (easy)  |  Go
• 836. Rectangle Overlap (easy)  |  Go
• 841. Keys and Rooms (medium)  |  Go
• 844. Backspace String Compare (easy)  |  Go
• 848. Shifting Letters (medium)  |  Go
• 852. Peak Index in a Mountain Array (medium)  |  Go
• 856. Score of Parentheses (medium)  |  Go
• 859. Buddy Strings (easy)  |  Go
• 860. Lemonade Change (easy)  |  Go
• 867. Transpose Matrix (easy)  |  Go
• 868. Binary Gap (easy)  |  Go
• 869. Reordered Power of 2 (medium)  |  Go
• 872. Leaf-Similar Trees (easy)  |  Go
• 876. Middle of the Linked List (easy)  |  Go
• 881. Boats to Save People (medium)  |  Go
• 883. Projection Area of 3D Shapes (easy)  |  Go
• 884. Uncommon Words from Two Sentences (easy)  |  Go
• 886. Possible Bipartition (medium)  |  Go
• 888. Fair Candy Swap (easy)  |  Go
• 889. Construct Binary Tree from Preorder and Postorder Traversal (medium)  |  Go
• 890. Find and Replace Pattern (medium)  |  Go
• 892. Surface Area of 3D Shapes (easy)  |  Go
• 895. Maximum Frequency Stack (hard)  |  Go
• 896. Monotonic Array (easy)  |  Go
• 897. Increasing Order Search Tree (easy)  |  Go
• 904. Fruit Into Baskets (medium)  |  Go
• 905. Sort Array By Parity (easy)  |  Go
• 908. Smallest Range I (easy)  |  Go
• 912. Sort an Array (medium)  |  Go
• 914. X of a Kind in a Deck of Cards (easy)  |  Go
• 916. Word Subsets (medium)  |  Go
• 917. Reverse Only Letters (easy)  |  Go
• 921. Minimum Add to Make Parentheses Valid (medium)  |  Go
• 922. Sort Array By Parity II (easy)  |  Go
• 925. Long Pressed Name (easy)  |  Go
• 926. Flip String to Monotone Increasing (medium)  |  Go
• 929. Unique Email Addresses (easy)  |  Go
• 931. Minimum Falling Path Sum (medium)  |  Go
• 933. Number of Recent Calls (easy)  |  Go
• 934. Shortest Bridge (medium)  |  Go
• 937. Reorder Data in Log Files (medium)  |  Go
• 938. Range Sum of BST (easy)  |  Go
• 941. Valid Mountain Array (easy)  |  Go
• 942. DI String Match (easy)  |  Go
• 944. Delete Columns to Make Sorted (easy)  |  Go
• 946. Validate Stack Sequences (medium)  |  Go
• 953. Verifying an Alien Dictionary (easy)  |  Go
• 958. Check Completeness of a Binary Tree (medium)  |  Go
• 961. N-Repeated Element in Size 2N Array (easy)  |  Go
• 965. Univalued Binary Tree (easy)  |  Go
• 973. K Closest Points to Origin (medium)  |  Go
• 976. Largest Perimeter Triangle (easy)  |  Go
• 977. Squares of a Sorted Array (easy)  |  Go
• 981. Time Based Key-Value Store (medium)  |  Go
• 989. Add to Array-Form of Integer (easy)  |  Go
• 991. Broken Calculator (medium)  |  Go
• 993. Cousins in Binary Tree (easy)  |  Go
• 994. Rotting Oranges (medium)  |  Go
• 997. Find the Town Judge (easy)  |  Go
• 999. Available Captures for Rook (easy)  |  Go
• 1002. Find Common Characters (easy)  |  Go
• 1005. Maximize Sum Of Array After K Negations (easy)  |  Go
• 1007. Minimum Domino Rotations For Equal Row (medium)  |  Go
• 1008. Construct Binary Search Tree from Preorder Traversal (medium)  |  Go
• 1009. Complement of Base 10 Integer (easy)  |  Go
• 1010. Pairs of Songs With Total Durations Divisible by 60 (medium)  |  Go
• 1013. Partition Array Into Three Parts With Equal Sum (easy)  |  Go
• 1015. Smallest Integer Divisible by K (medium)  |  Go
• 1018. Binary Prefix Divisible By 5 (easy)  |  Go
• 1020. Number of Enclaves (medium)  |  Go
• 1021. Remove Outermost Parentheses (easy)  |  Go
• 1022. Sum of Root To Leaf Binary Numbers (easy)  |  Go
• 1024. Video Stitching (medium)  |  Go
• 1025. Divisor Game (easy)  |  Go
• 1026. Maximum Difference Between Node and Ancestor (medium)  |  Go
• 1029. Two City Scheduling (medium)  |  Go
• 1030. Matrix Cells in Distance Order (easy)  |  Go
• 1037. Valid Boomerang (easy)  |  Go
• 1038. Binary Search Tree to Greater Sum Tree (medium)  |  Go
• 1041. Robot Bounded In Circle (medium)  |  Go
• 1046. Last Stone Weight (easy)  |  Go
• 1047. Remove All Adjacent Duplicates In String (easy)  |  Go
• 1050. Actors and Directors Who Cooperated At Least Three Times (easy)  |  SQL
• 1051. Height Checker (easy)  |  Go
• 1054. Distant Barcodes (medium)  |  Go
• 1055. Shortest Way to Form String (medium)  |  Go
• 1056. Confusing Number (easy)  |  Go
• 1060. Missing Element in Sorted Array (medium)  |  Go
• 1064. Fixed Point (easy)  |  Go
• 1065. Index Pairs of a String (easy)  |  Go
• 1068. Product Sales Analysis I (easy)  |  SQL
• 1069. Product Sales Analysis II (easy)  |  SQL
• 1071. Greatest Common Divisor of Strings (easy)  |  Go
• 1075. Project Employees I (easy)  |  SQL
• 1076. Project Employees II (easy)  |  SQL
• 1078. Occurrences After Bigram (easy)  |  Go
• 1082. Sales Analysis I (easy)  |  SQL
• 1083. Sales Analysis II (easy)  |  SQL
• 1084. Sales Analysis III (easy)  |  SQL
• 1085. Sum of Digits in the Minimum Number (easy)  |  Go
• 1086. High Five (easy)  |  Go
• 1089. Duplicate Zeros (easy)  |  Go
• 1091. Shortest Path in Binary Matrix (medium)  |  Go
• 1094. Car Pooling (medium)  |  Go
• 1099. Two Sum Less Than K (easy)  |  Go
• 1103. Distribute Candies to People (easy)  |  Go
• 1108. Defanging an IP Address (easy)  |  Go
• 1113. Reported Posts (easy)  |  SQL
• 1114. Print in Order (easy)  |  Python
• 1118. Number of Days in a Month (easy)  |  Go
• 1119. Remove Vowels from a String (easy)  |  Go
• 1122. Relative Sort Array (easy)  |  Go
• 1128. Number of Equivalent Domino Pairs (easy)  |  Go
• 1133. Largest Unique Number (easy)  |  Go
• 1134. Armstrong Number (easy)  |  Go
• 1137. N-th Tribonacci Number (easy)  |  Go
• 1141. User Activity for the Past 30 Days I (easy)  |  SQL
• 1142. User Activity for the Past 30 Days II (easy)  |  SQL
• 1143. Longest Common Subsequence (medium)  |  Go
• 1148. Article Views I (easy)  |  SQL
• 1150. Check If a Number Is Majority Element in a Sorted Array (easy)  |  Go
• 1154. Day of the Year (easy)  |  Go
• 1158. Market Analysis I (medium)  |  SQL
• 1160. Find Words That Can Be Formed by Characters (easy)  |  Go
• 1161. Maximum Level Sum of a Binary Tree (medium)  |  Go
• 1165. Single-Row Keyboard (easy)  |  Go
• 1166. Design File System (medium)  |  Go
• 1167. Minimum Cost to Connect Sticks (medium)  |  Go
• 1169. Invalid Transactions (medium)  |  Go
• 1173. Immediate Food Delivery I (easy)  |  SQL
• 1175. Prime Arrangements (easy)  |  Go
• 1176. Diet Plan Performance (easy)  |  Go
• 1179. Reformat Department Table (easy)  |  SQL
• 1180. Count Substrings with Only One Distinct Letter (easy)  |  Go
• 1184. Distance Between Bus Stops (easy)  |  Go
• 1185. Day of the Week (easy)  |  Go
• 1189. Maximum Number of Balloons (easy)  |  Go
• 1196. How Many Apples Can You Put into the Basket (easy)  |  Go
• 1200. Minimum Absolute Difference (easy)  |  Go
• 1207. Unique Number of Occurrences (easy)  |  Go
• 1209. Remove All Adjacent Duplicates in String II (medium)  |  Go
• 1211. Queries Quality and Percentage (easy)  |  SQL
• 1213. Intersection of Three Sorted Arrays (easy)  |  Go
• 1214. Two Sum BSTs (medium)  |  Go
• 1217. Minimum Cost to Move Chips to The Same Position (easy)  |  Go
• 1220. Count Vowels Permutation (hard)  |  Go
• 1221. Split a String in Balanced Strings (easy)  |  Go
• 1228. Missing Number In Arithmetic Progression (easy)  |  Go
• 1232. Check If It Is a Straight Line (easy)  |  Go
• 1233. Remove Sub-Folders from the Filesystem (medium)  |  Go
• 1236. Web Crawler (medium)  |  Go
• 1239. Maximum Length of a Concatenated String with Unique Characters (medium)  |  Go
• 1241. Number of Comments per Post (easy)  |  SQL
• 1243. Array Transformation (easy)  |  Go
• 1251. Average Selling Price (easy)  |  SQL
• 1252. Cells with Odd Values in a Matrix (easy)  |  Go
• 1254. Number of Closed Islands (medium)  |  Go
• 1256. Encode Number (medium)  |  Go
• 1260. Shift 2D Grid (easy)  |  Go
• 1261. Find Elements in a Contaminated Binary Tree (medium)  |  Go
• 1265. Print Immutable Linked List in Reverse (medium)  |  Go
• 1266. Minimum Time Visiting All Points (easy)  |  Go
• 1268. Search Suggestions System (medium)  |  Go
• 1271. Hexspeak (easy)  |  Go
• 1275. Find Winner on a Tic Tac Toe Game (easy)  |  Go
• 1279. Traffic Light Controlled Intersection (easy)  |  Python
• 1280. Students and Examinations (easy)  |  SQL
• 1281. Subtract the Product and Sum of Digits of an Integer (easy)  |  Go
• 1282. Group the People Given the Group Size They Belong To (medium)  |  Go
• 1286. Iterator for Combination (medium)  |  Go
• 1287. Element Appearing More Than 25% In Sorted Array (easy)  |  Go
• 1288. Remove Covered Intervals (medium)  |  Go
• 1290. Convert Binary Number in a Linked List to Integer (easy)  |  Go
• 1291. Sequential Digits (medium)  |  Go
• 1294. Weather Type in Each Country (easy)  |  SQL
• 1295. Find Numbers with Even Number of Digits (easy)  |  Go
• 1299. Replace Elements with Greatest Element on Right Side (easy)  |  Go
• 1302. Deepest Leaves Sum (medium)  |  Go
• 1303. Find the Team Size (easy)  |  SQL
• 1304. Find N Unique Integers Sum up to Zero (easy)  |  Go
• 1305. All Elements in Two Binary Search Trees (medium)  |  Go
• 1309. Decrypt String from Alphabet to Integer Mapping (easy)  |  Go
• 1313. Decompress Run-Length Encoded List (easy)  |  Go
• 1315. Sum of Nodes with Even-Valued Grandparent (medium)  |  Go
• 1317. Convert Integer to the Sum of Two No-Zero Integers (easy)  |  Go
• 1318. Minimum Flips to Make a OR b Equal to c (medium)  |  Go
• 1319. Number of Operations to Make Network Connected (medium)  |  Go
• 1322. Ads Performance (easy)  |  SQL
• 1323. Maximum 69 Number (easy)  |  Go
• 1325. Delete Leaves With a Given Value (medium)  |  Go
• 1327. List the Products Ordered in a Period (easy)  |  SQL
• 1328. Break a Palindrome (medium)  |  Go
• 1329. Sort the Matrix Diagonally (medium)  |  Go
• 1331. Rank Transform of an Array (easy)  |  Go
• 1332. Remove Palindromic Subsequences (easy)  |  Go
• 1337. The K Weakest Rows in a Matrix (easy)  |  Go
• 1338. Reduce Array Size to The Half (medium)  |  Go
• 1342. Number of Steps to Reduce a Number to Zero (easy)  |  Go
• 1346. Check If N and Its Double Exist (easy)  |  Go
• 1350. Students With Invalid Departments (easy)  |  SQL
• 1351. Count Negative Numbers in a Sorted Matrix (easy)  |  Go
• 1356. Sort Integers by The Number of 1 Bits (easy)  |  Go
• 1359. Count All Valid Pickup and Delivery Options (hard)  |  Go
• 1360. Number of Days Between Two Dates (easy)  |  Go
• 1365. How Many Numbers Are Smaller Than the Current Number (easy)  |  Go
• 1367. Linked List in Binary Tree (medium)  |  Go
• 1370. Increasing Decreasing String (easy)  |  Go
• 1372. Longest ZigZag Path in a Binary Tree (medium)  |  Go
• 1374. Generate a String With Characters That Have Odd Counts (easy)  |  Go
• 1378. Replace Employee ID With The Unique Identifier (easy)  |  SQL
• 1379. Find a Corresponding Node of a Binary Tree in a Clone of That Tree (easy)  |  Python
• 1380. Lucky Numbers in a Matrix (easy)  |  Go
• 1385. Find the Distance Value Between Two Arrays (easy)  |  Go
• 1389. Create Target Array in the Given Order (easy)  |  Go
• 1393. Capital Gain/Loss (medium)  |  SQL
• 1394. Find Lucky Integer in an Array (easy)  |  Go
• 1399. Count Largest Group (easy)  |  Go
• 1403. Minimum Subsequence in Non-Increasing Order (easy)  |  Go
• 1407. Top Travellers (easy)  |  SQL
• 1408. String Matching in an Array (easy)  |  Go
• 1413. Minimum Value to Get Positive Step by Step Sum (easy)  |  Go
• 1417. Reformat The String (easy)  |  Go
• 1421. NPV Queries (easy)  |  SQL
• 1422. Maximum Score After Splitting a String (easy)  |  Go
• 1423. Maximum Points You Can Obtain from Cards (medium)  |  Go
• 1424. Diagonal Traverse II (medium)  |  Go
• 1426. Counting Elements (easy)  |  Go
• 1427. Perform String Shifts (easy)  |  Go
• 1428. Leftmost Column with at Least a One (medium)  |  Go
• 1431. Kids With the Greatest Number of Candies (easy)  |  Go
• 1433. Check If a String Can Break Another String (medium)  |  Go
• 1435. Create a Session Bar Chart (easy)  |  SQL
• 1436. Destination City (easy)  |  Go
• 1437. Check If All 1's Are at Least Length K Places Away (easy)  |  Go
• 1441. Build an Array With Stack Operations (medium)  |  Go
• 1443. Minimum Time to Collect All Apples in a Tree (medium)  |  Go
• 1446. Consecutive Characters (easy)  |  Go
• 1450. Number of Students Doing Homework at a Given Time (easy)  |  Go
• 1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence (easy)  |  Go
• 1456. Maximum Number of Vowels in a Substring of Given Length (medium)  |  Go
• 1460. Make Two Arrays Equal by Reversing Subarrays (easy)  |  Go
• 1464. Maximum Product of Two Elements in an Array (easy)  |  Go
• 1465. Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts (medium)  |  Go
• 1469. Find All The Lonely Nodes (easy)  |  Go
• 1470. Shuffle the Array (easy)  |  Go
• 1472. Design Browser History (medium)  |  Go
• 1474. Delete N Nodes After M Nodes of a Linked List (easy)  |  Go
• 1475. Final Prices With a Special Discount in a Shop (easy)  |  Go
• 1476. Subrectangle Queries (medium)  |  Go
• 1480. Running Sum of 1d Array (easy)  |  Go
• 1484. Group Sold Products By The Date (easy)  |  SQL
• 1485. Clone Binary Tree With Random Pointer (medium)  |  Go
• 1486. XOR Operation in an Array (easy)  |  Go
• 1490. Clone N-ary Tree (medium)  |  Go
• 1491. Average Salary Excluding the Minimum and Maximum Salary (easy)  |  Go
• 1495. Friendly Movies Streamed Last Month (easy)  |  SQL
• 1496. Path Crossing (easy)  |  Go
• 1502. Can Make Arithmetic Progression From Sequence (easy)  |  Go
• 1506. Find Root of N-Ary Tree (medium)  |  Go
• 1507. Reformat Date (easy)  |  Go
• 1511. Customer Order Frequency (easy)  |  SQL
• 1512. Number of Good Pairs (easy)  |  Go
• 1514. Path with Maximum Probability (medium)  |  Go
• 1517. Find Users With Valid E-Mails (easy)  |  SQL
• 1518. Water Bottles (easy)  |  Go
• 1523. Count Odd Numbers in an Interval Range (easy)  |  Go
• 1525. Number of Good Ways to Split a String (medium)  |  Go
• 1527. Patients With a Condition (easy)  |  SQL
• 1528. Shuffle String (easy)  |  Go
• 1534. Count Good Triplets (easy)  |  Go
• 1539. Kth Missing Positive Number (easy)  |  Go
• 1543. Fix Product Name Format (easy)  |  SQL
• 1544. Make The String Great (easy)  |  Go
• 1550. Three Consecutive Odds (easy)  |  Go
• 1551. Minimum Operations to Make Array Equal (medium)  |  Go
• 1556. Thousand Separator (easy)  |  Go
• 1560. Most Visited Sector in a Circular Track (easy)  |  Go
• 1561. Maximum Number of Coins You Can Get (medium)  |  Go
• 1565. Unique Orders and Customers Per Month (easy)  |  SQL
• 1566. Detect Pattern of Length M Repeated K or More Times (easy)  |  Go
• 1570. Dot Product of Two Sparse Vectors (medium)  |  Go
• 1571. Warehouse Manager (easy)  |  SQL
• 1572. Matrix Diagonal Sum (easy)  |  Go
• 1576. Replace All ?'s to Avoid Consecutive Repeating Characters (easy)  |  Go
• 1581. Customer Who Visited but Did Not Make Any Transactions (easy)  |  SQL
• 1582. Special Positions in a Binary Matrix (easy)  |  Go
• 1586. Binary Search Tree Iterator II (medium)  |  Go
• 1587. Bank Account Summary II (easy)  |  SQL
• 1588. Sum of All Odd Length Subarrays (easy)  |  Go
• 1592. Rearrange Spaces Between Words (easy)  |  Go
• 1598. Crawler Log Folder (easy)  |  Go
• 1603. Design Parking System (easy)  |  Go
• 1607. Sellers With No Sales (easy)  |  SQL
• 1608. Special Array With X Elements Greater Than or Equal X (easy)  |  Go
• 1614. Maximum Nesting Depth of the Parentheses (easy)  |  Go
• 1619. Mean of Array After Removing Some Elements (easy)  |  Go
• 1623. All Valid Triplets That Can Represent a Country (easy)  |  SQL
• 1624. Largest Substring Between Two Equal Characters (easy)  |  Go
• 1629. Slowest Key (easy)  |  Go
• 1630. Arithmetic Subarrays (medium)  |  Go
• 1633. Percentage of Users Attended a Contest (easy)  |  SQL
• 1636. Sort Array by Increasing Frequency (easy)  |  Go
• 1637. Widest Vertical Area Between Two Points Containing No Points (medium)  |  Go
• 1640. Check Array Formation Through Concatenation (easy)  |  Go
• 1641. Count Sorted Vowel Strings (medium)  |  Go
• 1646. Get Maximum in Generated Array (easy)  |  Go
• 1652. Defuse the Bomb (easy)  |  Go
• 1656. Design an Ordered Stream (easy)  |  Go
• 1657. Determine if Two Strings Are Close (medium)  |  Go
• 1661. Average Time of Process per Machine (easy)  |  SQL
• 1662. Check If Two String Arrays are Equivalent (easy)  |  Go
• 1667. Fix Names in a Table (easy)  |  SQL
• 1668. Maximum Repeating Substring (easy)  |  Go
• 1669. Merge In Between Linked Lists (medium)  |  Go
• 1672. Richest Customer Wealth (easy)  |  Go
• 1677. Product's Worth Over Invoices (easy)  |  SQL
• 1678. Goal Parser Interpretation (easy)  |  Go
• 1679. Max Number of K-Sum Pairs (medium)  |  Go
• 1680. Concatenation of Consecutive Binary Numbers (medium)  |  Go
• 1683. Invalid Tweets (easy)  |  SQL
• 1684. Count the Number of Consistent Strings (easy)  |  Go
• 1688. Count of Matches in Tournament (easy)  |  Go
• 1689. Partitioning Into Minimum Number Of Deci-Binary Numbers (medium)  |  Go
• 1693. Daily Leads and Partners (easy)  |  SQL
• 1694. Reformat Phone Number (easy)  |  Go
• 1700. Number of Students Unable to Eat Lunch (easy)  |  Go
• 1704. Determine if String Halves Are Alike (easy)  |  Go
• 1708. Largest Subarray Length K (easy)  |  Go
• 1710. Maximum Units on a Truck (easy)  |  Go
• 1716. Calculate Money in Leetcode Bank (easy)  |  Go
• 1720. Decode XORed Array (easy)  |  Go
• 1721. Swapping Nodes in a Linked List (medium)  |  Go
• 1725. Number Of Rectangles That Can Form The Largest Square (easy)  |  Go
• 1729. Find Followers Count (easy)  |  SQL
• 1731. The Number of Employees Which Report to Each Employee (easy)  |  SQL
• 1732. Find the Highest Altitude (easy)  |  Go
• 1736. Latest Time by Replacing Hidden Digits (easy)  |  Go
• 1741. Find Total Time Spent by Each Employee (easy)  |  SQL
• 1742. Maximum Number of Balls in a Box (easy)  |  Go
• 1748. Sum of Unique Elements (easy)  |  Go
• 1752. Check if Array Is Sorted and Rotated (easy)  |  Go
• 1757. Recyclable and Low Fat Products (easy)  |  SQL
• 1758. Minimum Changes To Make Alternating Binary String (easy)  |  Go
• 1762. Buildings With an Ocean View (medium)  |  Go
• 1763. Longest Nice Substring (easy)  |  Go
• 1768. Merge Strings Alternately (easy)  |  Go
• 1769. Minimum Number of Operations to Move All Balls to Each Box (medium)  |  Go
• 1773. Count Items Matching a Rule (easy)  |  Go
• 1777. Product's Price for Each Store (easy)  |  SQL
• 1779. Find Nearest Point That Has the Same X or Y Coordinate (easy)  |  Go
• 1784. Check if Binary String Has at Most One Segment of Ones (easy)  |  Go
• 1789. Primary Department for Each Employee (easy)  |  SQL
• 1790. Check if One String Swap Can Make Strings Equal (easy)  |  Go
• 1791. Find Center of Star Graph (easy)  |  Go
• 1795. Rearrange Products Table (easy)  |  SQL
• 1796. Second Largest Digit in a String (easy)  |  Go
• 1797. Design Authentication Manager (medium)  |  Go
• 1798. Maximum Number of Consecutive Values You Can Make (medium)  |  Go
• 1800. Maximum Ascending Subarray Sum (easy)  |  Go
• 1804. Implement Trie II (Prefix Tree) (medium)  |  Go
• 1805. Number of Different Integers in a String (easy)  |  Go
• 1809. Ad-Free Sessions (easy)  |  SQL
• 1812. Determine Color of a Chessboard Square (easy)  |  Go
• 1813. Sentence Similarity III (medium)  |  Go
• 1816. Truncate Sentence (easy)  |  Go
• 1817. Finding the Users Active Minutes (medium)  |  Go
• 1821. Find Customers With Positive Revenue this Year (easy)  |  SQL
• 1822. Sign of the Product of an Array (easy)  |  Go
• 1826. Faulty Sensor (easy)  |  Go
• 1827. Minimum Operations to Make the Array Increasing (easy)  |  Go
• 1828. Queries on Number of Points Inside a Circle (medium)  |  Go
• 1829. Maximum XOR for Each Query (medium)  |  Go
• 1832. Check if the Sentence Is Pangram (easy)  |  Go
• 1833. Maximum Ice Cream Bars (medium)  |  Go
• 1834. Single-Threaded CPU (medium)  |  Go
• 1836. Remove Duplicates From an Unsorted Linked List (medium)  |  Go
• 1837. Sum of Digits in Base K (easy)  |  Go
• 1839. Longest Substring Of All Vowels in Order (medium)  |  Go
• 1844. Replace All Digits with Characters (easy)  |  Go
• 1845. Seat Reservation Manager (medium)  |  Go
• 1848. Minimum Distance to the Target Element (easy)  |  Go
• 1853. Convert Date Format (easy)  |  SQL
• 1854. Maximum Population Year (easy)  |  Go
• 1859. Sorting the Sentence (easy)  |  Go
• 1861. Rotating the Box (medium)  |  Go
• 1863. Sum of All Subset XOR Totals (easy)  |  Go
• 1869. Longer Contiguous Segments of Ones than Zeros (easy)  |  Go
• 1873. Calculate Special Bonus (easy)  |  SQL
• 1874. Minimize Product Sum of Two Arrays (medium)  |  Go
• 1876. Substrings of Size Three with Distinct Characters (easy)  |  Go
• 1877. Minimize Maximum Pair Sum in Array (medium)  |  Go
• 1880. Check if Word Equals Summation of Two Words (easy)  |  Go
• 1886. Determine Whether Matrix Can Be Obtained By Rotation (easy)  |  Go
• 1890. The Latest Login in 2020 (easy)  |  SQL
• 1893. Check if All the Integers in a Range Are Covered (easy)  |  Go
• 1897. Redistribute Characters to Make All Strings Equal (easy)  |  Go
• 1903. Largest Odd Number in String (easy)  |  Go
• 1905. Count Sub Islands (medium)  |  Go
• 1909. Remove One Element to Make the Array Strictly Increasing (easy)  |  Go
• 1913. Maximum Product Difference Between Two Pairs (easy)  |  Go
• 1920. Build Array from Permutation (easy)  |  Go
• 1925. Count Square Sum Triples (easy)  |  Go
• 1929. Concatenation of Array (easy)  |  Go
• 1933. Check if String Is Decomposable Into Value-Equal Substrings (easy)  |  Go
• 1935. Maximum Number of Words You Can Type (easy)  |  Go
• 1939. Users That Actively Request Confirmation Messages (easy)  |  SQL
• 1941. Check if All Characters Have Equal Number of Occurrences (easy)  |  Go
• 1944. Number of Visible People in a Queue (hard)  |  Go
• 1945. Sum of Digits of String After Convert (easy)  |  Go
• 1952. Three Divisors (easy)  |  Go
• 1957. Delete Characters to Make Fancy String (easy)  |  Go
• 1961. Check If String Is a Prefix of Array (easy)  |  Go
• 1962. Remove Stones to Minimize the Total (medium)  |  Go
• 1965. Employees With Missing Information (easy)  |  SQL
• 1967. Number of Strings That Appear as Substrings in Word (easy)  |  Go
• 1971. Find if Path Exists in Graph (easy)  |  Go
• 1974. Minimum Time to Type Word Using Special Typewriter (easy)  |  Go
• 1978. Employees Whose Manager Left the Company (easy)  |  SQL
• 1979. Find Greatest Common Divisor of Array (easy)  |  Go
• 1984. Minimum Difference Between Highest and Lowest of K Scores (easy)  |  Go
• 1991. Find the Middle Index in Array (easy)  |  Go
• 1995. Count Special Quadruplets (easy)  |  Go
• 2000. Reverse Prefix of Word (easy)  |  Go
• 2006. Count Number of Pairs With Absolute Difference K (easy)  |  Go
• 2007. Find Original Array From Doubled Array (medium)  |  Go
• 2011. Final Value of Variable After Performing Operations (easy)  |  Go
• 2016. Maximum Difference Between Increasing Elements (easy)  |  Go
• 2022. Convert 1D Array Into 2D Array (easy)  |  Go
• 2026. Low-Quality Problems (easy)  |  SQL
• 2027. Minimum Moves to Convert String (easy)  |  Go
• 2032. Two Out of Three (easy)  |  Go
• 2037. Minimum Number of Moves to Seat Everyone (easy)  |  Go
• 2042. Check if Numbers Are Ascending in a Sentence (easy)  |  Go
• 2046. Sort Linked List Already Sorted Using Absolute Values (medium)  |  Go
• 2047. Number of Valid Words in a Sentence (easy)  |  Go
• 2053. Kth Distinct String in an Array (easy)  |  Go
• 2057. Smallest Index With Equal Value (easy)  |  Go
• 2062. Count Vowel Substrings of a String (easy)  |  Go
• 2068. Check Whether Two Strings are Almost Equivalent (easy)  |  Go
• 2072. The Winner University (easy)  |  SQL
• 2073. Time Needed to Buy Tickets (easy)  |  Go
• 2078. Two Furthest Houses With Different Colors (easy)  |  Go
• 2082. The Number of Rich Customers (easy)  |  SQL
• 2085. Count Common Words With One Occurrence (easy)  |  Go
• 2089. Find Target Indices After Sorting Array (easy)  |  Go
• 2094. Finding 3-Digit Even Numbers (easy)  |  Go
• 2095. Delete the Middle Node of a Linked List (medium)  |  Go
• 2099. Find Subsequence of Length K With the Largest Sum (easy)  |  Go
• 2103. Rings and Rods (easy)  |  Go
• 2108. Find First Palindromic String in the Array (easy)  |  Go
• 2109. Adding Spaces to a String (medium)  |  Go
• 2114. Maximum Number of Words Found in Sentences (easy)  |  Go
• 2119. A Number After a Double Reversal (easy)  |  Go
• 2120. Execution of All Suffix Instructions Staying in a Grid (medium)  |  Go
• 2124. Check if All A's Appears Before All B's (easy)  |  Go
• 2125. Number of Laser Beams in a Bank (medium)  |  Go
• 2126. Destroying Asteroids (medium)  |  Go
• 2129. Capitalize the Title (easy)  |  Go
• 2130. Maximum Twin Sum of a Linked List (medium)  |  Go
• 2131. Longest Palindrome by Concatenating Two Letter Words (medium)  |  Go
• 2133. Check if Every Row and Column Contains All Numbers (easy)  |  Go
• 2138. Divide a String Into Groups of Size k (easy)  |  Go
• 2140. Solving Questions With Brainpower (medium)  |  Go
• 2144. Minimum Cost of Buying Candies With Discount (easy)  |  Go
• 2148. Count Elements With Strictly Smaller and Greater Elements (easy)  |  Go
• 2149. Rearrange Array Elements by Sign (medium)  |  Go
• 2154. Keep Multiplying Found Values by Two (easy)  |  Go
• 2160. Minimum Sum of Four Digit Number After Splitting Digits (easy)  |  Go
• 2161. Partition Array According to Given Pivot (medium)  |  Go
• 2164. Sort Even and Odd Indices Independently (easy)  |  Go
• 2166. Design Bitset (medium)  |  Go
• 2169. Count Operations to Obtain Zero (easy)  |  Go
• 2176. Count Equal and Divisible Pairs in an Array (easy)  |  Go
• 2180. Count Integers With Even Digit Sum (easy)  |  Go
• 2181. Merge Nodes in Between Zeros (medium)  |  Go
• 2182. Construct String With Repeat Limit (medium)  |  Go
• 2185. Counting Words With a Given Prefix (easy)  |  Go
• 2190. Most Frequent Number Following Key In an Array (easy)  |  Go
• 2194. Cells in a Range on an Excel Sheet (easy)  |  Go
• 2195. Append K Integers With Minimal Sum (medium)  |  Go
• 2196. Create Binary Tree From Descriptions (medium)  |  Go
• 2200. Find All K-Distant Indices in an Array (easy)  |  Go
• 2205. The Number of Users That Are Eligible for Discount (easy)  |  SQL
• 2206. Divide Array Into Equal Pairs (easy)  |  Go
• 2210. Count Hills and Valleys in an Array (easy)  |  Go
• 2214. Minimum Health to Beat Game (medium)  |  Go
• 2215. Find the Difference of Two Arrays (easy)  |  Go
• 2220. Minimum Bit Flips to Convert Number (easy)  |  Go
• 2224. Minimum Number of Operations to Convert Time (easy)  |  Go
• 2225. Find Players With Zero or One Losses (medium)  |  Go
• 2229. Check if an Array Is Consecutive (easy)  |  Go
• 2230. The Users That Are Eligible for Discount (easy)  |  SQL
• 2231. Largest Number After Digit Swaps by Parity (easy)  |  Go
• 2233. Maximum Product After K Increments (medium)  |  Go
• 2235. Add Two Integers (easy)  |  Go
• 2236. Root Equals Sum of Children (easy)  |  Go
• 2239. Find Closest Number to Zero (easy)  |  Go
• 2241. Design an ATM Machine (medium)  |  Go
• 2243. Calculate Digit Sum of a String (easy)  |  Go
• 2244. Minimum Rounds to Complete All Tasks (medium)  |  Go
• 2248. Intersection of Multiple Arrays (easy)  |  Go
• 2255. Count Prefixes of a Given String (easy)  |  Go
• 2256. Minimum Average Difference (medium)  |  Go
• 2259. Remove Digit From Number to Maximize Result (easy)  |  Go
• 2264. Largest 3-Same-Digit Number in String (easy)  |  Go
• 2265. Count Nodes Equal to Average of Subtree (medium)  |  Go
• 2269. Find the K-Beauty of a Number (easy)  |  Go
• 2273. Find Resultant Array After Removing Anagrams (easy)  |  Go
• 2278. Percentage of Letter in String (easy)  |  Go
• 2279. Maximum Bags With Full Capacity of Rocks (medium)  |  Go
• 2280. Minimum Lines to Represent a Line Chart (medium)  |  Go
• 2283. Check if Number Has Equal Digit Count and Digit Value (easy)  |  Go
• 2284. Sender With Largest Word Count (medium)  |  Go
• 2287. Rearrange Characters to Make Target String (easy)  |  Go
• 2288. Apply Discount to Prices (medium)  |  Go
• 2293. Min Max Game (easy)  |  Go
• 2299. Strong Password Checker II (easy)  |  Go
• 2300. Successful Pairs of Spells and Potions (medium)  |  Go
• 2303. Calculate Amount Paid in Taxes (easy)  |  Go
• 2306. Naming a Company (hard)  |  Go
• 2309. Greatest English Letter in Upper and Lower Case (easy)  |  Go
• 2315. Count Asterisks (easy)  |  Go
• 2316. Count Unreachable Pairs of Nodes in an Undirected Graph (medium)  |  Go
• 2319. Check if Matrix Is X-Matrix (easy)  |  Go
• 2325. Decode the Message (easy)  |  Go
• 2326. Spiral Matrix IV (medium)  |  Go
• 2329. Product Sales Analysis V (easy)  |  SQL
• 2331. Evaluate Boolean Binary Tree (easy)  |  Go
• 2335. Minimum Amount of Time to Fill Cups (easy)  |  Go
• 2336. Smallest Number in Infinite Set (medium)  |  Go
• 2339. All the Matches of the League (easy)  |  SQL
• 2341. Maximum Number of Pairs in Array (easy)  |  Go
• 2347. Best Poker Hand (easy)  |  Go
• 2348. Number of Zero-Filled Subarrays (medium)  |  Go
• 2349. Design a Number Container System (medium)  |  Go
• 2351. First Letter to Appear Twice (easy)  |  Go
• 2352. Equal Row and Column Pairs (medium)  |  Go
• 2353. Design a Food Rating System (medium)  |  Go
• 2356. Number of Unique Subjects Taught by Each Teacher (easy)  |  SQL
• 2357. Make Array Zero by Subtracting Equal Amounts (easy)  |  Go
• 2359. Find Closest Node to Given Two Nodes (medium)  |  Go
• 2363. Merge Similar Items (easy)  |  Go
• 2367. Number of Arithmetic Triplets (easy)  |  Go
• 2373. Largest Local Values in a Matrix (easy)  |  Go
• 2377. Sort the Olympic Table (easy)  |  SQL
• 2379. Minimum Recolors to Get K Consecutive Black Blocks (easy)  |  Go
• 2381. Shifting Letters II (medium)  |  Go
• 2383. Minimum Hours of Training to Win a Competition (easy)  |  Go
• 2389. Longest Subsequence With Limited Sum (easy)  |  Go
• 2390. Removing Stars From a String (medium)  |  Go
• 2391. Minimum Amount of Time to Collect Garbage (medium)  |  Go
• 2393. Count Strictly Increasing Subarrays (medium)  |  Go
• 2395. Find Subarrays With Equal Sum (easy)  |  Go
• 2396. Strictly Palindromic Number (medium)  |  Go
• 2399. Check Distances Between Same Letters (easy)  |  Go
• 2404. Most Frequent Even Element (easy)  |  Go
• 2405. Optimal Partition of String (medium)  |  Go
• 2408. Design SQL (medium)  |  Go
• 2409. Count Days Spent Together (easy)  |  Go
• 2413. Smallest Even Multiple (easy)  |  Go
• 2415. Reverse Odd Levels of Binary Tree (medium)  |  Go
• 2418. Sort the People (easy)  |  Go
• 2423. Remove Letter To Equalize Frequency (easy)  |  Go
• 2427. Number of Common Factors (easy)  |  Go
• 2428. Maximum Sum of an Hourglass (medium)  |  Go
• 2432. The Employee That Worked on the Longest Task (easy)  |  Go
• 2433. Find The Original Array of Prefix Xor (medium)  |  Go
• 2437. Number of Valid Clock Times (easy)  |  Go
• 2441. Largest Positive Integer That Exists With Its Negative (easy)  |  Go
• 2442. Count Number of Distinct Integers After Reverse Operations (medium)  |  Go
• 2443. Sum of Number and Its Reverse (medium)  |  Go
• 2446. Determine if Two Events Have Conflict (easy)  |  Go
• 2451. Odd String Difference (easy)  |  Go
• 2455. Average Value of Even Numbers That Are Divisible by Three (easy)  |  Go
• 2456. Most Popular Video Creator (medium)  |  Go
• 2460. Apply Operations to an Array (easy)  |  Go
• 2462. Total Cost to Hire K Workers (medium)  |  Go
• 2465. Number of Distinct Averages (easy)  |  Go
• 2469. Convert the Temperature (easy)  |  Go
• 2475. Number of Unequal Triplets in Array (easy)  |  Go
• 2480. Form a Chemical Bond (easy)  |  SQL
• 2481. Minimum Cuts to Divide a Circle (easy)  |  Go
• 2482. Difference Between Ones and Zeros in Row and Column (medium)  |  Go
• 2483. Minimum Penalty for a Shop (medium)  |  Go
• 2485. Find the Pivot Integer (easy)  |  Go
• 2486. Append Characters to String to Make Subsequence (medium)  |  Go
• 2487. Remove Nodes From Linked List (medium)  |  Go
• 2490. Circular Sentence (easy)  |  Go
• 2491. Divide Players Into Teams of Equal Skill (medium)  |  Go
• 2492. Minimum Score of a Path Between Two Cities (medium)  |  Go
• 2496. Maximum Value of a String in an Array (easy)  |  Go
• 2500. Delete Greatest Value in Each Row (easy)  |  Go
• 2501. Longest Square Streak in an Array (medium)  |  Go
• 2502. Design Memory Allocator (medium)  |  Go
• 2504. Concatenate the Name and the Profession (easy)  |  SQL
• 2506. Count Pairs Of Similar Strings (easy)  |  Go
• 2511. Maximum Enemy Forts That Can Be Captured (easy)  |  Go
• 2512. Reward Top K Students (medium)  |  Go
• 2515. Shortest Distance to Target String in a Circular Array (easy)  |  Go
• 2520. Count the Digits That Divide a Number (easy)  |  Go
• 2521. Distinct Prime Factors of Product of Array (medium)  |  Go
• 2522. Partition String Into Substrings With Values at Most K (medium)  |  Go
• 2523. Closest Prime Numbers in Range (medium)  |  Go
• 2525. Categorize Box According to Criteria (easy)  |  Go
• 2526. Find Consecutive Integers from a Data Stream (medium)  |  Go
• 2529. Maximum Count of Positive Integer and Negative Integer (easy)  |  Go
• 2535. Difference Between Element Sum and Digit Sum of an Array (easy)  |  Go
• 2540. Minimum Common Value (easy)  |  Go
• 2541. Minimum Operations to Make Array Equal II (medium)  |  Go
• 2542. Maximum Subsequence Score (medium)  |  Go
• 2544. Alternating Digit Sum (easy)  |  Go
• 2545. Sort the Students by Their Kth Score (medium)  |  Go
• 2548. Maximum Price to Fill a Bag (medium)  |  Go
• 2549. Count Distinct Numbers on Board (easy)  |  Go
• 2553. Separate the Digits in an Array (easy)  |  Go
• 2554. Maximum Number of Integers to Choose From a Range I (medium)  |  Go
• 2557. Maximum Number of Integers to Choose From a Range II (medium)  |  Go
• 2558. Take Gifts From the Richest Pile (easy)  |  Go
• 2559. Count Vowel Strings in Ranges (medium)  |  Go
• 2562. Find the Array Concatenation Value (easy)  |  Go
• 2563. Count the Number of Fair Pairs (medium)  |  Go
• 2566. Maximum Difference by Remapping a Digit (easy)  |  Go
• 2570. Merge Two 2D Arrays by Summing Values (easy)  |  Go
• 2574. Left and Right Sum Differences (easy)  |  Go
• 2578. Split With Minimum Sum (easy)  |  Go
• 2582. Pass the Pillow (easy)  |  Go
• 2586. Count the Number of Vowel Strings in Range (easy)  |  Go
• 2587. Rearrange Array to Maximize Prefix Score (medium)  |  Go
• 2590. Design a Todo List (medium)  |  Go
• 2591. Distribute Money to Maximum Children (easy)  |  Go
• 2595. Number of Even and Odd Bits (easy)  |  Go
• 2596. Check Knight Tour Configuration (medium)  |  Go
• 2599. Make the Prefix Sum Non-negative (medium)  |  Go
• 2600. K Items With the Maximum Sum (easy)  |  Go
• 2601. Prime Subtraction Operation (medium)  |  Go
• 2602. Minimum Operations to Make All Array Elements Equal (medium)  |  Go
• 2605. Form Smallest Number From Two Digit Arrays (easy)  |  Go
• 2606. Find the Substring With Maximum Cost (medium)  |  Go
• 2609. Find the Longest Balanced Substring of a Binary String (easy)  |  Go
• 2610. Convert an Array Into a 2D Array With Conditions (medium)  |  Go
• 2611. Mice and Cheese (medium)  |  Go
• 2614. Prime In Diagonal (easy)  |  Go
• 2618. Check if Object Instance of Class (medium)  |  JS
• 2619. Array Prototype Last (easy)  |  JS
• 2620. Counter (easy)  |  JS
• 2621. Sleep (easy)  |  JS
• 2622. Cache With Time Limit (medium)  |  JS
• 2626. Array Reduce Transformation (easy)  |  JS
• 2629. Function Composition (easy)  |  JS
• 2631. Group By (medium)  |  JS
• 2633. Convert Object to JSON String (medium)  |  JS
• 2634. Filter Elements from Array (easy)  |  JS
• 2635. Apply Transform Over Each Element in Array (easy)  |  JS
• 2637. Promise Time Limit (medium)  |  JS
• 2639. Find the Width of Columns of a Grid (easy)  |  Go
• 2640. Find the Score of All Prefixes of an Array (medium)  |  Go
• 2641. Cousins in Binary Tree II (medium)  |  Go
• 2643. Row With Maximum Ones (easy)  |  Go
• 2644. Find the Maximum Divisibility Score (easy)  |  Go
• 2648. Generate Fibonacci Sequence (easy)  |  JS
• 2651. Calculate Delayed Arrival Time (easy)  |  Go
• 2652. Sum Multiples (easy)  |  Go
• 2655. Find Maximal Uncovered Ranges (medium)  |  Go
• 2656. Maximum Sum With Exactly K Elements (easy)  |  Go
• 2657. Find the Prefix Common Array of Two Arrays (medium)  |  Go
• 2658. Maximum Number of Fish in a Grid (medium)  |  Go
• 2660. Determine the Winner of a Bowling Game (easy)  |  Go
• 2661. First Completely Painted Row or Column (medium)  |  Go
• 2665. Counter II (easy)  |  JS
• 2666. Allow One Function Call (easy)  |  JS
• 2667. Create Hello World Function (easy)  |  JS
• 2668. Find Latest Salaries (easy)  |  SQL
• 2669. Count Artist Occurrences On Spotify Ranking List (easy)  |  SQL
• 2670. Find the Distinct Difference Array (easy)  |  Go
• 2671. Frequency Tracker (medium)  |  Go
• 2674. Split a Circular Linked List (medium)  |  Go
• 2677. Chunk Array (easy)  |  JS
• 2678. Number of Senior Citizens (easy)  |  Go
• 2682. Find the Losers of the Circular Game (easy)  |  Go
• 2687. Bikes Last Time Used (easy)  |  SQL
• 2689. Extract Kth Character From The Rope Tree (easy)  |  Go
• 2690. Infinite Method Object (easy)  |  JS
• 2695. Array Wrapper (easy)  |  JS
• 2696. Minimum String Length After Removing Substrings (easy)  |  Go
• 2697. Lexicographically Smallest Palindrome (easy)  |  Go
• 2703. Return Length of Arguments Passed (easy)  |  JS
• 2704. To Be Or Not To Be (easy)  |  JS
• 2706. Buy Two Chocolates (easy)  |  Go
• 2708. Maximum Strength of a Group (medium)  |  Go
• 2710. Remove Trailing Zeros From a String (easy)  |  Go
• 2715. Timeout Cancellation (easy)  |  JS
• 2716. Minimize String Length (easy)  |  Go
• 2717. Semi-Ordered Permutation (easy)  |  Go
• 2723. Add Two Promises (easy)  |  JS
• 2724. Sort By (easy)  |  JS
• 2725. Interval Cancellation (easy)  |  JS
• 2726. Calculator with Method Chaining (easy)  |  JS
• 2727. Is Object Empty (easy)  |  JS
• 2728. Count Houses in a Circular Street (easy)  |  Go
• 2729. Check if The Number is Fascinating (easy)  |  Go
• 2733. Neither Minimum nor Maximum (easy)  |  Go
• 2739. Total Distance Traveled (easy)  |  Go
• 2744. Find Maximum Number of String Pairs (easy)  |  Go
• 2748. Number of Beautiful Pairs (easy)  |  Go
• 2758. Next Day (easy)  |  JS
• 2760. Longest Even Odd Subarray With Threshold (easy)  |  Go
• 2765. Longest Alternating Subarray (easy)  |  Go
• 2766. Relocate Marbles (medium)  |  Go
• 2769. Find the Maximum Achievable Number (easy)  |  Go
• 2774. Array Upper Bound (easy)  |  JS
• 2775. Undefined to Null (medium)  |  JS
• 2778. Sum of Squares of Special Elements (easy)  |  Go
• 2782. Number of Unique Categories (medium)  |  Go
• 2784. Check if Array is Good (easy)  |  Go
• 2785. Sort Vowels in a String (medium)  |  Go
• 2788. Split Strings by Separator (easy)  |  Go
• 2789. Largest Element in an Array after Merge Operations (medium)  |  Go
• 2794. Create Object from Two Arrays (easy)  |  JS
• 2796. Repeat String (easy)  |  JS
• 2798. Number of Employees Who Met the Target (easy)  |  Go
• 2803. Factorial Generator (easy)  |  JS
• 2804. Array Prototype ForEach (easy)  |  JS
• 2806. Account Balance After Rounded Purchase (easy)  |  Go
• 2807. Insert Greatest Common Divisors in Linked List (medium)  |  Go
• 2810. Faulty Keyboard (easy)  |  Go
• 2815. Max Pair Sum in an Array (easy)  |  Go
• 2816. Double a Number Represented as a Linked List (medium)  |  Go
• 2821. Delay the Resolution of Each Promise (easy)  |  JS
• 2822. Inversion of Object (easy)  |  JS
• 2824. Count Pairs Whose Sum is Less than Target (easy)  |  Go
• 2828. Check if a String Is an Acronym of Words (easy)  |  Go
• 2833. Furthest Point From Origin (easy)  |  Go
• 2837. Total Traveled Distance (easy)  |  SQL
• 2838. Maximum Coins Heroes Can Collect (medium)  |  Go
• 2839. Check if Strings Can be Made Equal With Operations I (easy)  |  Go
• 2843. Count Symmetric Integers (easy)  |  Go
• 2847. Smallest Number With Given Digit Product (medium)  |  Go
• 2848. Points That Intersect With Cars (easy)  |  Go
• 2853. Highest Salaries Difference (easy)  |  SQL
• 2855. Minimum Right Shifts to Sort the Array (easy)  |  Go
• 2859. Sum of Values at Indices With K Set Bits (easy)  |  Go