NeetCode 150

Concept-ordered view with NeetCode sequence retained inside each concept.

Solved: 0 / 150 Coverage: 114/150

1. Arrays & Hashing

NC#1 easy 217. Contains Duplicate NC#2 easy 242. Valid Anagram NC#3 medium 1. Two Sum NC#4 medium 49. Group Anagrams NC#5 medium 347. Top K Frequent Elements NC#6 medium 238. Product of Array Except Self NC#7 medium 36. Valid Sudoku NC#9 medium 128. Longest Consecutive Sequence

2. Two Pointers

NC#10 easy 125. Valid Palindrome NC#11 medium 167. Two Sum II - Input Array Is Sorted NC#12 medium 15. 3Sum NC#13 medium 11. Container With Most Water NC#14 hard 42. Trapping Rain Water

3. Sliding Window

NC#15 easy 121. Best Time to Buy and Sell Stock NC#16 medium 3. Longest Substring Without Repeating Characters NC#17 medium 424. Longest Repeating Character Replacement NC#18 medium 567. Permutation in String NC#19 hard 76. Minimum Window Substring

4. Stack

NC#21 easy 20. Valid Parentheses NC#22 medium 155. Min Stack NC#23 medium 150. Evaluate Reverse Polish Notation NC#25 medium 739. Daily Temperatures

5. Binary Search

NC#28 easy 704. Binary Search NC#29 medium 74. Search a 2D Matrix NC#30 medium 875. Koko Eating Bananas NC#31 medium 153. Find Minimum in Rotated Sorted Array NC#32 medium 33. Search in Rotated Sorted Array NC#34 hard 4. Median of Two Sorted Arrays

6. Linked List

NC#35 easy 206. Reverse Linked List NC#36 easy 21. Merge Two Sorted Lists NC#37 medium 143. Reorder List NC#38 medium 19. Remove Nth Node From End of List NC#39 medium 138. Copy List with Random Pointer NC#40 medium 2. Add Two Numbers NC#41 easy 141. Linked List Cycle NC#44 hard 23. Merge k Sorted Lists NC#45 hard 25. Reverse Nodes in k-Group

7. Trees

NC#46 easy 226. Invert Binary Tree NC#47 easy 104. Maximum Depth of Binary Tree NC#48 medium 543. Diameter of Binary Tree NC#49 medium 110. Balanced Binary Tree NC#50 easy 100. Same Tree NC#51 easy 572. Subtree of Another Tree NC#52 easy 235. Lowest Common Ancestor of a Binary Search Tree NC#54 medium 199. Binary Tree Right Side View NC#56 medium 98. Validate Binary Search Tree NC#57 medium 230. Kth Smallest Element in a BST NC#58 medium 105. Construct Binary Tree from Preorder and Inorder Traversal NC#59 hard 124. Binary Tree Maximum Path Sum

8. Intervals

NC#130 medium 57. Insert Interval NC#131 medium 56. Merge Intervals NC#133 easy 252. Meeting Rooms NC#134 medium 253. Meeting Rooms II

9. Bit Manipulation

NC#145 easy 191. Number of 1 Bits NC#147 easy 190. Reverse Bits NC#148 easy 268. Missing Number NC#149 medium 371. Sum of Two Integers

10. Backtracking

NC#71 medium 78. Subsets NC#72 medium 39. Combination Sum NC#73 medium 46. Permutations NC#74 medium 90. Subsets II NC#75 medium 40. Combination Sum II NC#79 hard 51. N-Queens

11. Dynamic Programming

NC#99 easy 70. Climbing Stairs NC#100 medium 746. Min Cost Climbing Stairs NC#101 medium 198. House Robber NC#102 medium 213. House Robber II NC#103 medium 5. Longest Palindromic Substring NC#104 medium 647. Palindromic Substrings NC#105 medium 91. Decode Ways NC#106 medium 322. Coin Change NC#107 medium 152. Maximum Product Subarray NC#108 medium 139. Word Break NC#109 medium 300. Longest Increasing Subsequence NC#111 medium 62. Unique Paths NC#112 medium 1143. Longest Common Subsequence NC#113 medium 309. Best Time to Buy and Sell Stock with Cooldown NC#114 medium 518. Coin Change II NC#116 medium 97. Interleaving String NC#119 medium 72. Edit Distance NC#121 hard 10. Regular Expression Matching NC#122 medium 53. Maximum Subarray NC#146 easy 338. Counting Bits

12. Greedy

NC#123 medium 55. Jump Game

13. Stack / Backtracking

NC#24 medium 22. Generate Parentheses

14. Greedy / BFS

NC#124 medium 45. Jump Game II

15. Math & Geometry

NC#136 medium 48. Rotate Image NC#138 medium 73. Set Matrix Zeroes NC#140 easy 66. Plus One NC#141 medium 50. Pow(x, n)

16. Math & Geometry - Simulation

NC#137 medium 54. Spiral Matrix

17. Backtracking / DFS

NC#76 medium 79. Word Search

18. Stack - Monotonic Stack

NC#27 hard 84. Largest Rectangle in Histogram

19. Trees / BFS

NC#53 medium 102. Binary Tree Level Order Traversal

20. Graphs - BFS

NC#92 hard 127. Word Ladder

21. Backtracking / DP

NC#77 medium 131. Palindrome Partitioning

22. Graphs / DFS

NC#80 medium 200. Number of Islands NC#81 medium 133. Clone Graph NC#82 medium 695. Max Area of Island NC#83 medium 417. Pacific Atlantic Water Flow

23. Graphs / Topological Sort

NC#87 medium 207. Course Schedule

24. Tries - Prefix Tree

NC#61 medium 208. Implement Trie (Prefix Tree)

25. Trie / Data Structure Design

NC#62 medium 211. Design Add and Search Words Data Structure

26. Backtracking / Trie

NC#63 hard 212. Word Search II

27. Heap / Priority Queue

NC#64 medium 703. Kth Largest Element in a Stream NC#65 easy 1046. Last Stone Weight NC#66 medium 973. K Closest Points to Origin NC#67 medium 215. Kth Largest Element in an Array NC#68 medium 621. Task Scheduler

28. Graphs / Trees

NC#91 hard 261. Graph Valid Tree

29. NeetCode 150

NC#8 todo Encode and Decode Strings
NC#20 todo Sliding Window Maximum
NC#26 todo Car Fleet
NC#33 todo Time Based Key-Value Store
NC#43 todo LRU Cache
NC#55 todo Count Good Nodes in Binary Tree
NC#69 todo Design Twitter
NC#70 todo Find Median from Data Stream
NC#78 todo Letter Combinations of a Phone Number
NC#84 todo Surrounded Regions
NC#86 todo Walls and Gates
NC#88 todo Course Schedule II
NC#89 todo Redundant Connection
NC#90 todo Number of Connected Components in an Undirected Graph
NC#93 todo Reconstruct Itinerary
NC#94 todo Min Cost to Connect All Points
NC#95 todo Network Delay Time
NC#96 todo Swim in Rising Water
NC#97 todo Alien Dictionary
NC#98 todo Cheapest Flights Within K Stops
NC#110 todo Partition Equal Subset Sum
NC#115 todo Target Sum
NC#117 todo Longest Increasing Path in a Matrix
NC#118 todo Distinct Subsequences
NC#120 todo Burst Balloons
NC#125 todo Gas Station
NC#126 todo Hand of Straights
NC#127 todo Merge Triplets to Form Target Triplet
NC#128 todo Partition Labels
NC#129 todo Valid Parenthesis String
NC#135 todo Minimum Interval to Include Each Query
NC#139 todo Happy Number
NC#142 todo Multiply Strings
NC#143 todo Detect Squares
NC#144 todo Single Number
NC#150 todo Reverse Integer

30. Linked List / Floyd's Algorithm

NC#42 medium 287. Find the Duplicate Number

31. Trees / DFS

NC#60 hard 297. Serialize and Deserialize Binary Tree

32. Intervals / Greedy

NC#132 medium 435. Non-overlapping Intervals

33. Graphs / BFS

NC#85 medium 994. Rotting Oranges