leetcode
Leetcode
Topic
Stack
- 20. Valid Parentheses
- 32. Longest Valid Parentheses
- 71. Simplify Path
- 84. Largest Rectangle in Histogram
- 316. Remove Duplicate Letters
- 456. 132 Pattern
- 735. Asteroid Collision
- 844. Backspace String Compare
- 856. Score of Parentheses
- 946. Validate Stack Sequences
- 1047. Remove All Adjacent Duplicates In String #string-duplicates
- 1209. Remove All Adjacent Duplicates in String II
- 1249. Minimum Remove to Make Valid Parentheses
- 2390. Removing Stars From a String
Monotonic Stack
- 496. Next Greater Element I
- 503. Next Greater Element II
- 581. Shortest Unsorted Continuous Subarray
- 739. Daily Temperatures
- 907. Sum of Subarray Minimums
- 1475. Final Prices With a Special Discount in a Shop
- 1673. Find the Most Competitive Subsequence
Hash Table
- 36. Valid Sudoku
- 141. Linked List Cycle
- 205. Isomorphic Strings
- 532. K-diff Pairs in an Array
- 1436. Destination City
- 1512. Number of Good Pairs
- 1679. Max Number of K-Sum Pairs
Backtracking
- 17. Letter Combinations of a Phone Number
- 39. Combination Sum
- 40. Combination Sum II
- 216. Combination Sum III
- 46. Permutations
- 47. Permutations II
- 77. Combinations
- 78. Subsets
- 90. Subsets II
- 1641. Count Sorted Vowel Strings
Two Pointers
- 11. Container With Most Water
- 32. Longest Valid Parentheses 👍
- 42. Trapping Rain Water 👍
- 75. Sort Colors
- 283. Move Zeroes
- 344. Reverse String
- 532. K-diff Pairs in an Array 👍
- 680. Valid Palindrome II
- 905. Sort Array By Parity
- 844. Backspace String Compare
- 881. Boats to Save People
- 1055. Shortest Way to Form String
Dynamic Programming
- 5. Longest Palindromic Substring
- 42. Trapping Rain Water
- 62. Unique Paths
- 63. Unique Paths II
- 64. Minimum Path Sum
- 118. Pascal’s Triangle
- 121. Best Time to Buy and Sell Stock
- 139. Word Break
- 198. House Robber
- 213. House Robber II
- 239. Sliding Window Maximum
- 256. Paint House
- 265. Paint House II
- 300. Longest Increasing Subsequence
- 322. Coin Change
- 377. Combination Sum IV
- 403. Frog Jump
- 486. Predict the Winner
- 516. Longest Palindromic Subsequence
- 518. Coin Change 2
- 542. 01 Matrix
- 629. K Inverse Pairs Array
- 646 Maximum Length of Pair Chain
- 647. Palindromic Substrings
- 673. Number of Longest Increasing Subsequence
- 727. Minimum Window Subsequence
- 746. Min Cost Climbing Stairs 🩷
- 837. New 21 Game
- 920. Number of Music Playlists
- 983. Minimum Cost For Tickets
- 1027. Longest Arithmetic Subsequence
- 1137. N-th Tribonacci Number
- 1140. Stone Game II
- 1218. Longest Arithmetic Subsequence of Given Difference
- 1220. Count Vowels Permutation
- 1230. Toss Strange Coins
- 1312. Minimum Insertion Steps to Make a String Palindrome
- 1406. Stone Game III
- 1547. Minimum Cost to Cut a Stick
- 1575. Count All Possible Routes
- 1639. Number of Ways to Form a Target String Given a Dictionary
- 1746. Maximum Subarray Sum After One Operation
- 1770. Maximum Score from Performing Multiplication Operations
- 2140. Solving Questions With Brainpower
- 2369. Check if There is a Valid Partition For The Array
- 2466. Count Ways To Build Good Strings
Binary Search
- 33. Search in Rotated Sorted Array
- 74. Search a 2D Matrix
- 81. Search in Rotated Sorted Array II
- 153. Find Minimum in Rotated Sorted Array
- 162. Find Peak Element
- 658. Find K Closest Elements
- 744. Find Smallest Letter Greater Than Target
- 852. Peak Index in a Mountain Array
- 875. Koko Eating Bananas
- 958. Check Completeness of a Binary Tree
- 1011. Capacity To Ship Packages Within D Days
- 1095. Find in Mountain Array
- 1150. Check If a Number Is Majority Element in a Sorted Array
- 1351. Count Negative Numbers in a Sorted Matrix
- 1802. Maximum Value at a Given Index in a Bounded Array
- 1870. Minimum Speed to Arrive on Time
- 1964. Find the Longest Valid Obstacle Course at Each Position
- 2141. Maximum Running Time of N Computers
- 2616. Minimize the Maximum Difference of Pairs
Longest Increasing Sequence
Heap
Greedy
- 134. Gas Station
- 135. Candy
- 485. Max Consecutive Ones
- 605. Can Place Flowers
- 646. Maximum Length of Pair Chain
- 881. Boats to Save People
- 1282. Group the People Given the Group Size They Belong To
- 1326. Minimum Number of Taps to Open to Water a Garden
- 1402. Reducing Dishes
- 2366. Minimum Replacements to Sort the Array
Prefix Sum
- 238. Product of Array Except Self
- 325. Maximum Size Subarray Sum Equals k
- 523. Continuous Subarray Sum
- 560. Subarray Sum Equals K
Counting Sort
Sliding Window
- 3. Longest Substring Without Repeating Characters
- 209. Minimum Size Subarray Sum
- 424. Longest Repeating Character Replacement
- 487. Max Consecutive Ones II
- 674. Longest Continuous Increasing Subsequence
- 904. Fruit Into Baskets
- 1493. Longest Subarray of 1’s After Deleting One Element
- 2024. Maximize the Confusion of an Exam
Binary Search Tree
- 99. Recover Binary Search Tree
- 101. Symmetric Tree
- 104. Maximum Depth of Binary Tree
- 109. Convert Sorted List to Binary Search Tree #linked-list
- 111. Minimum Depth of Binary Tree
- 230. Kth Smallest Element in a BST
- 257. Binary Tree Paths
- 538. Convert BST to Greater Tree
- 662. Maximum Width of Binary Tree
- 669. Trim a Binary Search Tree
- 700. Search in a Binary Search Tree
- 701. Insert into a Binary Search Tree
- 705. Design HashSet
- 863. All Nodes Distance K in Binary Tree
- 897. Increasing Order Search Tree
- 1302. Deepest Leaves Sum #preorder
- 1372. Longest ZigZag Path in a Binary Tree
- 1379. Find a Corresponding Node of a Binary Tree in a Clone of That Tree #inorder
- 1631. Path With Minimum Effort
Bit manipulation
- 136. Single Number
- 191. Number of 1 Bits
- 268. Missing Number
- 318. Maximum Product of Word Lengths
- 389. Find the Difference
- 461. Hamming Distance
- 1342. Number of Steps to Reduce a Number to Zero
Matrix / Graph
- 48. Rotate Image
- 79. Word Search
- 261. Graph Valid Tree
- 286. Walls and Gates
- 200. Number of Islands
- 289. Game of Life
- 329. Longest Increasing Path in a Matrix
- 422. Valid Word Square
- 542. 01 Matrix
- 547. Number of Provinces
- 733. Flood Fill
- 994. Rotting Oranges
- 1260. Shift 2D Grid
- 1337. The K Weakest Rows in a Matrix
- 1466. Reorder Routes to Make All Paths Lead to the City Zero
- 2101. Detonate the Maximum Bombs
- 2316. Count Unreachable Pairs of Nodes in an Undirected Graph
- 2360. Longest Cycle in a Graph
Union Find
- 200. Number of Islands
- 261. Graph Valid Tree
- 305. Number of Islands II
- 323. Number of Connected Components in an Undirected Graph
- 399. Evaluate Division
- 547. Number of Provinces
- 1202. Smallest String With Swaps
- 1319. Number of Operations to Make Network Connected
- 1584. Min Cost to Connect All Points
- 1631. Path With Minimum Effort
- 1697. Checking Existence of Edge Length Limited Paths
- 2492. Minimum Score of a Path Between Two Cities
Dijkstra Algorithm
Bellman-Ford Algorithm
Minimum Spanning Tree
Floyd Tortoise and Hare
Fisher-Yates Algorithm
Hierholzer Algorithm
Boyer Moore Voting Algorithm
- 169. Majority Element
- 229. Majority Element II
- 1150. Check If a Number Is Majority Element in a Sorted Array
Kadane Algorithm
- 53. Maximum Subarray
- 1746. Maximum Subarray Sum After One Operation
- 2272. Substring With Largest Variance
Kahn Algorithm
- 207. Course Schedule
- 210. Course Schedule II
- 269. Alien Dictionary
- 332. Reconstruct Itinerary
- 802. Find Eventual Safe States
- 1136. Parallel Courses
- 2050. Parallel Courses III
Design
- 146. LRU Cache
- 155. Min Stack
- 348. Design Tic-Tac-Toe
- 384. Shuffle an Array
- 535. Encode and Decode TinyURL
- 729. My Calendar I
- 1472. Design Browser History
Big-O cheatsheet
VS Code Extension
https://marketplace.visualstudio.com/items?itemName=LeetCode.vscode-leetcode