NeetCode 150 LeetCode Study Plan

NeetCode 150 builds directly on Blind 75 by adding 75 carefully chosen problems across the same 18 topics—arrays, two pointers, sliding window, stack, binary search, linked list, trees, tries, heap, backtracking, graphs, advanced graphs, 1-D and 2-D dynamic programming, greedy, intervals, math, and bit manipulation.

With roughly twice the problems per topic as Blind 75, you get to practice each pattern more than once so you can recognize it on sight in an interview. Every problem you solved in Blind 75 or the 12-plan route carries over automatically.

150 problemsRating 1161–286318 Topics

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Arrays and Hashing

Problem	Difficulty / Rating
217. Contains Duplicate	Easy
242. Valid Anagram	Easy
1. Two Sum	1161
49. Group Anagrams	Medium
347. Top K Frequent Elements	Medium
238. Product of Array Except Self	Medium
36. Valid Sudoku	Medium
271. Encode and Decode Strings Premium (Optional)	Medium
128. Longest Consecutive Sequence	Medium

Two Pointers

Problem	Difficulty / Rating
125. Valid Palindrome	1263
167. Two Sum II Input Array Is Sorted	1263
15. 3sum	1263
11. Container with Most Water	1263
42. Trapping Rain Water	1263

Sliding Window

Problem	Difficulty / Rating
121. Best Time to Buy AND Sell Stock	Easy
3. Longest Substring Without Repeating Characters	1263
424. Longest Repeating Character Replacement	1787
567. Permutation in String	2006
76. Minimum Window Substring	1592
239. Sliding Window Maximum	1851

Stack

Problem	Difficulty / Rating
20. Valid Parentheses	1242
155. Min Stack	1772
150. Evaluate Reverse Polish Notation	1408
22. Generate Parentheses	Medium
739. Daily Temperatures	1700
853. Car Fleet	1600
84. Largest Rectangle in Histogram	1900

Binary Search

Problem	Difficulty / Rating
704. Binary Search	Easy
74. Search a 2D Matrix	Medium
875. Koko Eating Bananas	1766
153. Find Minimum in Rotated Sorted Array	Medium
33. Search in Rotated Sorted Array	Medium
981. Time Based Key Value Store	Medium
4. Median of Two Sorted Arrays	Hard

Linked Lists

Problem	Difficulty / Rating
206. Reverse Linked List	Easy
21. Merge Two Sorted Lists	Easy
143. Reorder List	Medium
19. Remove Nth Node From End of List	Medium
138. Copy List with Random Pointer	Medium
2. Add Two Numbers	Medium
141. Linked List Cycle	Easy
287. Find the Duplicate Number	Medium
146. Lru Cache	2863
23. Merge K Sorted Lists	1818
25. Reverse Nodes in K Group	Hard

Trees

Problem	Difficulty / Rating
226. Invert Binary Tree	Easy
104. Maximum Depth of Binary Tree	Easy
543. Diameter of Binary Tree	Easy
110. Balanced Binary Tree	Easy
100. Same Tree	Easy
572. Subtree of Another Tree	Easy
235. Lowest Common Ancestor of a Binary Search Tree	Medium
102. Binary Tree Level Order Traversal	Medium
199. Binary Tree Right Side View	Medium
1448. Count Good Nodes in Binary Tree	1360
98. Validate Binary Search Tree	Medium
230. Kth Smallest Element in a Bst	Medium
105. Construct Binary Tree From Preorder AND Inorder Traversal	Medium
124. Binary Tree Maximum Path Sum	Hard
297. Serialize AND Deserialize Binary Tree	Hard

Tries

Problem	Difficulty / Rating
208. Implement Trie Prefix Tree	1180
211. Design Add AND Search Words Data Structure	1725
212. Word Search II	1725

Heaps

Problem	Difficulty / Rating
703. Kth Largest Element in a Stream	1419
1046. Last Stone Weight	1173
973. K Closest Points to Origin	Medium
215. Kth Largest Element in an Array	Medium
621. Task Scheduler	1905
355. Design Twitter	1822
295. Find Median From Data Stream	2159

Backtracking

Problem	Difficulty / Rating
78. Subsets	Medium
39. Combination Sum	Medium
46. Permutations	Medium
90. Subsets II	Medium
40. Combination Sum II	Medium
79. Word Search	Medium
131. Palindrome Partitioning	Medium
17. Letter Combinations of a Phone Number	Medium
51. N Queens	Hard

Graphs

Problem	Difficulty / Rating
200. Number of Islands	Medium
133. Clone Graph	Medium
695. Max Area of Island	Medium
417. Pacific Atlantic Water Flow	1900
130. Surrounded Regions	Medium
994. Rotting Oranges	Medium
286. Walls and Gates Premium (Optional)	Medium
207. Course Schedule	Medium
210. Course Schedule II	Medium
684. Redundant Connection	Medium
323. Number of Connected Components in an Undirected Graph Premium (Optional)	Medium
261. Graph Valid Tree Premium (Optional)	Medium
127. Word Ladder	Hard

Advanced Graphs

Problem	Difficulty / Rating
332. Reconstruct Itinerary	Hard
1584. Min Cost to Connect All Points	1858
743. Network Delay Time	Medium
778. Swim in Rising Water	2097
269. Alien Dictionary Premium (Optional)	Hard
787. Cheapest Flights Within K Stops	Medium

1-D DP

Problem	Difficulty / Rating
70. Climbing Stairs	Easy
746. Min Cost Climbing Stairs	1500
198. House Robber	Medium
213. House Robber II	Medium
5. Longest Palindromic Substring	Medium
647. Palindromic Substrings	Medium
91. Decode Ways	Medium
322. Coin Change	Medium
152. Maximum Product Subarray	Medium
139. Word Break	Medium
300. Longest Increasing Subsequence	Medium
416. Partition Equal Subset Sum	Medium

2-D DP

Problem	Difficulty / Rating
62. Unique Paths	Medium
1143. Longest Common Subsequence	Medium
309. Best Time to Buy AND Sell Stock with Cooldown	Medium
518. Coin Change II	Medium
494. Target Sum	Medium
97. Interleaving String	Medium
329. Longest Increasing Path in a Matrix	Hard
115. Distinct Subsequences	Hard
72. Edit Distance	Medium
312. Burst Balloons	Hard
10. Regular Expression Matching	Hard

Greedy

Problem	Difficulty / Rating
53. Maximum Subarray	Medium
55. Jump Game	Medium
45. Jump Game II	1700
134. Gas Station	Medium
846. Hand of Straights	Medium
1899. Merge Triplets to Form Target Triplet	1636
763. Partition Labels	1443
678. Valid Parenthesis String	1700

Intervals

Problem	Difficulty / Rating
57. Insert Interval	Medium
56. Merge Intervals	Medium
435. Non Overlapping Intervals	1700
252. Meeting Rooms Premium (Optional)	Easy
253. Meeting Rooms II Premium (Optional)	Medium
1851. Minimum Interval to Include Each Query	2286

Math and Geometry

Problem	Difficulty / Rating
48. Rotate Image	Medium
54. Spiral Matrix	Medium
73. Set Matrix Zeroes	Medium
202. Happy Number	Easy
66. Plus One	Easy
50. Pow(x, n)	Medium
43. Multiply Strings	Medium
2013. Detect Squares	Medium

Bit Manipulation

Problem	Difficulty / Rating
136. Single Number	Easy
191. Number of 1 Bits	Easy
338. Counting Bits	Easy
190. Reverse Bits	Easy
268. Missing Number	Easy
371. Sum of Two Integers	Medium
7. Reverse Integer	Medium

Choose NeetCode 150 when signing your study contract or switch from Blind 75 in the Study Plan drawer to fill in the remaining 75 problems topic by topic.

Ratings come from zerotrac's LeetCode contest ratings. Classic pre-contest problems show their LeetCode difficulty level instead.

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