What are the most frequent LeetCode questions for NeetCode 150?

The top problems asked in NeetCode 150 technical interviews include Contains Duplicate, Valid Anagram, Two Sum. In total, 150 verified problems are tracked across Easy (28), Medium (101), and Hard (21) tiers.

Where can I find company-wise LeetCode questions for NeetCode 150?

LeetMap Pro provides a complete, verified list of 150 company-wise NeetCode 150 coding interview questions filtered by 30-day, 3-month, and 6-month recency windows, 100% free with no paywall or subscription.

How does LeetMap track NeetCode 150 interview problem recency?

LeetMap weights problem occurrences across 30-day, 3-month, and 6-month recency windows to ensure candidates focus on problems actively being asked in the current hiring cycle.

What difficulty distribution should I expect in NeetCode 150 coding rounds?

For NeetCode 150, Medium difficulty problems represent the largest share (101 problems), followed by Easy (28) and Hard (21). Mastering foundational patterns like Trees, Graphs, and Dynamic Programming is essential.

NeetCode 150LeetCode Questions

Verified

150 questions·28 Easy·101 Medium·21 Hard

Company-wise coding interview questions asked by NeetCode 150, ranked by real frequency across 30-day, 3-month, and 6-month recency windows.

⌘K

#217Contains Duplicate

Easy·Freq 100%·Acc 64.5%

#242Valid Anagram

Easy·Freq 99%·Acc 68.3%

#1Two Sum

Easy·Freq 99%·Acc 57.8%

#49Group Anagrams

Medium·Freq 99%·Acc 72.9%

#347Top K Frequent Elements

Medium·Freq 99%·Acc 66.8%

#271Encode and Decode Strings

Medium·Freq 98%·Acc 51.7%

#238Product of Array Except Self

Medium·Freq 98%·Acc 69.1%

#36Valid Sudoku

Medium·Freq 98%·Acc 64.7%

#128Longest Consecutive Sequence

Medium·Freq 97%·Acc 47.2%

#125Valid Palindrome

Easy·Freq 97%·Acc 53.7%

#167Two Sum II - Input Array Is Sorted

Medium·Freq 97%·Acc 65.4%

#153Sum

Medium·Freq 96%·Acc 39.4%

#11Container With Most Water

Medium·Freq 96%·Acc 60.4%

#42Trapping Rain Water

Hard·Freq 96%·Acc 67.7%

#121Best Time to Buy and Sell Stock

Easy·Freq 96%·Acc 57.0%

#3Longest Substring Without Repeating Characters

Medium·Freq 95%·Acc 39.4%

#424Longest Repeating Character Replacement

Medium·Freq 95%·Acc 60.1%

#567Permutation in String

Medium·Freq 95%·Acc 49.2%

#76Minimum Window Substring

Hard·Freq 94%·Acc 47.9%

#239Sliding Window Maximum

Hard·Freq 94%·Acc 0.5%

#20Valid Parentheses

Easy·Freq 94%·Acc 44.5%

#155Min Stack

Medium·Freq 93%·Acc 58.4%

#150Evaluate Reverse Polish Notation

Medium·Freq 93%·Acc 58.2%

#739Daily Temperatures

Medium·Freq 93%·Acc 0.7%

#853Car Fleet

Medium·Freq 93%·Acc 55.4%

#84Largest Rectangle in Histogram

Hard·Freq 92%·Acc 50.3%

#704Binary Search

Easy·Freq 92%·Acc 61.1%

#74Search a 2D Matrix

Medium·Freq 92%·Acc 54.3%

#875Koko Eating Bananas

Medium·Freq 91%·Acc 50.2%

#153Find Minimum in Rotated Sorted Array

Medium·Freq 91%·Acc 0.6%

#33Search in Rotated Sorted Array

Medium·Freq 91%·Acc 45.2%

#981Time Based Key-Value Store

Medium·Freq 90%·Acc 0.5%

#4Median of Two Sorted Arrays

Hard·Freq 90%·Acc 47.0%

#206Reverse Linked List

Easy·Freq 90%·Acc 80.8%

#21Merge Two Sorted Lists

Easy·Freq 90%·Acc 68.5%

#141Linked List Cycle

Easy·Freq 89%·Acc 54.7%

#143Reorder List

Medium·Freq 89%·Acc 0.7%

#19Remove Nth Node From End of List

Medium·Freq 89%·Acc 52.0%

#138Copy List with Random Pointer

Medium·Freq 88%·Acc 63.3%

#2Add Two Numbers

Medium·Freq 88%·Acc 48.8%

#287Find the Duplicate Number

Medium·Freq 88%·Acc 64.6%

#146LRU Cache

Medium·Freq 87%·Acc 47.6%

#23Merge k Sorted Lists

Hard·Freq 87%·Acc 0.6%

#25Reverse Nodes in k-Group

Hard·Freq 87%·Acc 66.6%

#226Invert Binary Tree

Easy·Freq 87%·Acc 0.8%

#104Maximum Depth of Binary Tree

Easy·Freq 86%·Acc 0.8%

#543Diameter of Binary Tree

Easy·Freq 86%·Acc 0.7%

#110Balanced Binary Tree

Easy·Freq 86%·Acc 58.7%

#100Same Tree

Easy·Freq 85%·Acc 67.5%

#572Subtree of Another Tree

Easy·Freq 85%·Acc 51.9%

#235Lowest Common Ancestor of a Binary Search Tree

Medium·Freq 85%·Acc 70.9%

#102Binary Tree Level Order Traversal

Medium·Freq 84%·Acc 73.0%

#199Binary Tree Right Side View

Medium·Freq 84%·Acc 70.7%

#1448Count Good Nodes in Binary Tree

Medium·Freq 84%·Acc 73.9%

#98Validate Binary Search Tree

Medium·Freq 84%·Acc 36.0%

#230Kth Smallest Element in a BST

Medium·Freq 83%·Acc 0.8%

#105Construct Binary Tree from Preorder and Inorder Traversal

Medium·Freq 83%·Acc 69.1%

#124Binary Tree Maximum Path Sum

Hard·Freq 83%·Acc 42.5%

#297Serialize and Deserialize Binary Tree

Hard·Freq 82%·Acc 61.1%

#703Kth Largest Element in a Stream

Easy·Freq 82%·Acc 61.3%

#1046Last Stone Weight

Easy·Freq 82%·Acc 66.6%

#973K Closest Points to Origin

Medium·Freq 81%·Acc 69.2%

#215Kth Largest Element in an Array

Medium·Freq 81%·Acc 69.1%

#621Task Scheduler

Medium·Freq 81%·Acc 63.4%

#355Design Twitter

Medium·Freq 81%·Acc 45.1%

#295Find Median from Data Stream

Hard·Freq 80%·Acc 54.7%

#78Subsets

Medium·Freq 80%·Acc 82.5%

#39Combination Sum

Medium·Freq 80%·Acc 76.8%

#40Combination Sum II

Medium·Freq 79%·Acc 0.6%

#46Permutations

Medium·Freq 79%·Acc 82.1%

#90Subsets II

Medium·Freq 79%·Acc 61.6%

#22Generate Parentheses

Medium·Freq 78%·Acc 78.9%

#79Word Search

Medium·Freq 78%·Acc 0.5%

#131Palindrome Partitioning

Medium·Freq 78%·Acc 0.7%

#17Letter Combinations of a Phone Number

Medium·Freq 78%·Acc 66.4%

#51N-Queens

Hard·Freq 77%·Acc 76.0%

#208Implement Trie (Prefix Tree)

Medium·Freq 77%·Acc 0.7%

#211Design Add and Search Words Data Structure

Medium·Freq 77%·Acc 48.7%

#212Word Search II

Hard·Freq 76%·Acc 38.6%

#200Number of Islands

Medium·Freq 76%·Acc 64.7%

#695Max Area of Island

Medium·Freq 76%·Acc 74.1%

#133Clone Graph

Medium·Freq 75%·Acc 65.7%

#286Walls and Gates

Medium·Freq 75%·Acc 0.6%

#994Rotting Oranges

Medium·Freq 75%·Acc 59.0%

#417Pacific Atlantic Water Flow

Medium·Freq 75%·Acc 61.2%

#130Surrounded Regions

Medium·Freq 74%·Acc 45.8%

#207Course Schedule

Medium·Freq 74%·Acc 51.8%

#210Course Schedule II

Medium·Freq 74%·Acc 55.9%

#261Graph Valid Tree

Medium·Freq 73%·Acc 50.1%

#323Number of Connected Components in an Undirected Graph

Medium·Freq 73%·Acc 65.1%

#684Redundant Connection

Medium·Freq 73%·Acc 67.9%

#127Word Ladder

Hard·Freq 72%·Acc 0.5%

#743Network Delay Time

Medium·Freq 72%·Acc 61.0%

#332Reconstruct Itinerary

Hard·Freq 72%·Acc 44.7%

#1584Min Cost to Connect All Points

Medium·Freq 72%·Acc 71.3%

#778Swim in Rising Water

Hard·Freq 71%·Acc 68.0%

#269Alien Dictionary

Hard·Freq 71%·Acc 37.3%

#787Cheapest Flights Within K Stops

Medium·Freq 71%·Acc 42.2%

#70Climbing Stairs

Easy·Freq 70%·Acc 54.2%

#746Min Cost Climbing Stairs

Easy·Freq 70%·Acc 68.5%

#198House Robber

Medium·Freq 70%·Acc 53.4%

#213House Robber II

Medium·Freq 69%·Acc 45.2%

#5Longest Palindromic Substring

Medium·Freq 69%·Acc 38.2%

#647Palindromic Substrings

Medium·Freq 69%·Acc 73.0%

#91Decode Ways

Medium·Freq 69%·Acc 0.4%

#322Coin Change

Medium·Freq 68%·Acc 48.7%

#152Maximum Product Subarray

Medium·Freq 68%·Acc 36.7%

#139Word Break

Medium·Freq 68%·Acc 49.6%

#300Longest Increasing Subsequence

Medium·Freq 67%·Acc 59.7%

#416Partition Equal Subset Sum

Medium·Freq 67%·Acc 0.5%

#62Unique Paths

Medium·Freq 67%·Acc 0.7%

#1143Longest Common Subsequence

Medium·Freq 66%·Acc 0.6%

#309Best Time to Buy and Sell Stock with Cooldown

Medium·Freq 66%·Acc 62.4%

#518Coin Change II

Medium·Freq 66%·Acc 59.6%

#494Target Sum

Medium·Freq 66%·Acc 52.5%

#97Interleaving String

Medium·Freq 65%·Acc 44.3%

#329Longest Increasing Path in a Matrix

Hard·Freq 65%·Acc 56.8%

#115Distinct Subsequences

Hard·Freq 65%·Acc 52.2%

#72Edit Distance

Medium·Freq 64%·Acc 60.9%

#312Burst Balloons

Hard·Freq 64%·Acc 63.9%

#10Regular Expression Matching

Hard·Freq 64%·Acc 31.2%

#53Maximum Subarray

Medium·Freq 63%·Acc 53.5%

#55Jump Game

Medium·Freq 63%·Acc 41.2%

#45Jump Game II

Medium·Freq 63%·Acc 43.1%

#134Gas Station

Medium·Freq 63%·Acc 48.3%

#846Hand of Straights

Medium·Freq 62%·Acc 0.6%

#1899Merge Triplets to Form Target Triplet

Medium·Freq 62%·Acc 69.2%

#763Partition Labels

Medium·Freq 62%·Acc 0.8%

#678Valid Parenthesis String

Medium·Freq 61%·Acc 40.3%

#57Insert Interval

Medium·Freq 61%·Acc 0.5%

#56Merge Intervals

Medium·Freq 61%·Acc 0.5%

#435Non-overlapping Intervals

Medium·Freq 60%·Acc 0.6%

#252Meeting Rooms

Easy·Freq 60%·Acc 59.5%

#253Meeting Rooms II

Medium·Freq 60%·Acc 0.5%

#1851Minimum Interval to Include Each Query

Hard·Freq 60%·Acc 0.5%

#48Rotate Image

Medium·Freq 59%·Acc 80.4%

#54Spiral Matrix

Medium·Freq 59%·Acc 57.2%

#73Set Matrix Zeroes

Medium·Freq 59%·Acc 63.3%

#202Happy Number

Easy·Freq 58%·Acc 59.9%

#66Plus One

Easy·Freq 58%·Acc 0.5%

#50Pow(x, n)

Medium·Freq 58%·Acc 38.9%

#43Multiply Strings

Medium·Freq 57%·Acc 44.4%

#2013Detect Squares

Medium·Freq 57%·Acc 52.8%

#136Single Number

Easy·Freq 57%·Acc 0.8%

#191Number of 1 Bits

Easy·Freq 57%·Acc 77.1%

#338Counting Bits

Easy·Freq 56%·Acc 0.8%

#190Reverse Bits

Easy·Freq 56%·Acc 68.8%

#268Missing Number

Easy·Freq 56%·Acc 72.3%

#371Sum of Two Integers

Medium·Freq 55%·Acc 55.8%

#7Reverse Integer

Medium·Freq 55%·Acc 32.1%

#	Problem	Difficulty	Frequency↓	Acceptance
#217	Contains Duplicate	Easy	100%	64.5%
#242	Valid Anagram	Easy	99%	68.3%
#1	Two Sum	Easy	99%	57.8%
#49	Group Anagrams	Medium	99%	72.9%
#347	Top K Frequent Elements	Medium	99%	66.8%
#271	Encode and Decode Strings	Medium	98%	51.7%
#238	Product of Array Except Self	Medium	98%	69.1%
#36	Valid Sudoku	Medium	98%	64.7%
#128	Longest Consecutive Sequence	Medium	97%	47.2%
#125	Valid Palindrome	Easy	97%	53.7%
#167	Two Sum II - Input Array Is Sorted	Medium	97%	65.4%
#15	3Sum	Medium	96%	39.4%
#11	Container With Most Water	Medium	96%	60.4%
#42	Trapping Rain Water	Hard	96%	67.7%
#121	Best Time to Buy and Sell Stock	Easy	96%	57.0%
#3	Longest Substring Without Repeating Characters	Medium	95%	39.4%
#424	Longest Repeating Character Replacement	Medium	95%	60.1%
#567	Permutation in String	Medium	95%	49.2%
#76	Minimum Window Substring	Hard	94%	47.9%
#239	Sliding Window Maximum	Hard	94%	0.5%
#20	Valid Parentheses	Easy	94%	44.5%
#155	Min Stack	Medium	93%	58.4%
#150	Evaluate Reverse Polish Notation	Medium	93%	58.2%
#739	Daily Temperatures	Medium	93%	0.7%
#853	Car Fleet	Medium	93%	55.4%
#84	Largest Rectangle in Histogram	Hard	92%	50.3%
#704	Binary Search	Easy	92%	61.1%
#74	Search a 2D Matrix	Medium	92%	54.3%
#875	Koko Eating Bananas	Medium	91%	50.2%
#153	Find Minimum in Rotated Sorted Array	Medium	91%	0.6%
#33	Search in Rotated Sorted Array	Medium	91%	45.2%
#981	Time Based Key-Value Store	Medium	90%	0.5%
#4	Median of Two Sorted Arrays	Hard	90%	47.0%
#206	Reverse Linked List	Easy	90%	80.8%
#21	Merge Two Sorted Lists	Easy	90%	68.5%
#141	Linked List Cycle	Easy	89%	54.7%
#143	Reorder List	Medium	89%	0.7%
#19	Remove Nth Node From End of List	Medium	89%	52.0%
#138	Copy List with Random Pointer	Medium	88%	63.3%
#2	Add Two Numbers	Medium	88%	48.8%
#287	Find the Duplicate Number	Medium	88%	64.6%
#146	LRU Cache	Medium	87%	47.6%
#23	Merge k Sorted Lists	Hard	87%	0.6%
#25	Reverse Nodes in k-Group	Hard	87%	66.6%
#226	Invert Binary Tree	Easy	87%	0.8%
#104	Maximum Depth of Binary Tree	Easy	86%	0.8%
#543	Diameter of Binary Tree	Easy	86%	0.7%
#110	Balanced Binary Tree	Easy	86%	58.7%
#100	Same Tree	Easy	85%	67.5%
#572	Subtree of Another Tree	Easy	85%	51.9%
#235	Lowest Common Ancestor of a Binary Search Tree	Medium	85%	70.9%
#102	Binary Tree Level Order Traversal	Medium	84%	73.0%
#199	Binary Tree Right Side View	Medium	84%	70.7%
#1448	Count Good Nodes in Binary Tree	Medium	84%	73.9%
#98	Validate Binary Search Tree	Medium	84%	36.0%
#230	Kth Smallest Element in a BST	Medium	83%	0.8%
#105	Construct Binary Tree from Preorder and Inorder Traversal	Medium	83%	69.1%
#124	Binary Tree Maximum Path Sum	Hard	83%	42.5%
#297	Serialize and Deserialize Binary Tree	Hard	82%	61.1%
#703	Kth Largest Element in a Stream	Easy	82%	61.3%
#1046	Last Stone Weight	Easy	82%	66.6%
#973	K Closest Points to Origin	Medium	81%	69.2%
#215	Kth Largest Element in an Array	Medium	81%	69.1%
#621	Task Scheduler	Medium	81%	63.4%
#355	Design Twitter	Medium	81%	45.1%
#295	Find Median from Data Stream	Hard	80%	54.7%
#78	Subsets	Medium	80%	82.5%
#39	Combination Sum	Medium	80%	76.8%
#40	Combination Sum II	Medium	79%	0.6%
#46	Permutations	Medium	79%	82.1%
#90	Subsets II	Medium	79%	61.6%
#22	Generate Parentheses	Medium	78%	78.9%
#79	Word Search	Medium	78%	0.5%
#131	Palindrome Partitioning	Medium	78%	0.7%
#17	Letter Combinations of a Phone Number	Medium	78%	66.4%
#51	N-Queens	Hard	77%	76.0%
#208	Implement Trie (Prefix Tree)	Medium	77%	0.7%
#211	Design Add and Search Words Data Structure	Medium	77%	48.7%
#212	Word Search II	Hard	76%	38.6%
#200	Number of Islands	Medium	76%	64.7%
#695	Max Area of Island	Medium	76%	74.1%
#133	Clone Graph	Medium	75%	65.7%
#286	Walls and Gates	Medium	75%	0.6%
#994	Rotting Oranges	Medium	75%	59.0%
#417	Pacific Atlantic Water Flow	Medium	75%	61.2%
#130	Surrounded Regions	Medium	74%	45.8%
#207	Course Schedule	Medium	74%	51.8%
#210	Course Schedule II	Medium	74%	55.9%
#261	Graph Valid Tree	Medium	73%	50.1%
#323	Number of Connected Components in an Undirected Graph	Medium	73%	65.1%
#684	Redundant Connection	Medium	73%	67.9%
#127	Word Ladder	Hard	72%	0.5%
#743	Network Delay Time	Medium	72%	61.0%
#332	Reconstruct Itinerary	Hard	72%	44.7%
#1584	Min Cost to Connect All Points	Medium	72%	71.3%
#778	Swim in Rising Water	Hard	71%	68.0%
#269	Alien Dictionary	Hard	71%	37.3%
#787	Cheapest Flights Within K Stops	Medium	71%	42.2%
#70	Climbing Stairs	Easy	70%	54.2%
#746	Min Cost Climbing Stairs	Easy	70%	68.5%
#198	House Robber	Medium	70%	53.4%
#213	House Robber II	Medium	69%	45.2%
#5	Longest Palindromic Substring	Medium	69%	38.2%
#647	Palindromic Substrings	Medium	69%	73.0%
#91	Decode Ways	Medium	69%	0.4%
#322	Coin Change	Medium	68%	48.7%
#152	Maximum Product Subarray	Medium	68%	36.7%
#139	Word Break	Medium	68%	49.6%
#300	Longest Increasing Subsequence	Medium	67%	59.7%
#416	Partition Equal Subset Sum	Medium	67%	0.5%
#62	Unique Paths	Medium	67%	0.7%
#1143	Longest Common Subsequence	Medium	66%	0.6%
#309	Best Time to Buy and Sell Stock with Cooldown	Medium	66%	62.4%
#518	Coin Change II	Medium	66%	59.6%
#494	Target Sum	Medium	66%	52.5%
#97	Interleaving String	Medium	65%	44.3%
#329	Longest Increasing Path in a Matrix	Hard	65%	56.8%
#115	Distinct Subsequences	Hard	65%	52.2%
#72	Edit Distance	Medium	64%	60.9%
#312	Burst Balloons	Hard	64%	63.9%
#10	Regular Expression Matching	Hard	64%	31.2%
#53	Maximum Subarray	Medium	63%	53.5%
#55	Jump Game	Medium	63%	41.2%
#45	Jump Game II	Medium	63%	43.1%
#134	Gas Station	Medium	63%	48.3%
#846	Hand of Straights	Medium	62%	0.6%
#1899	Merge Triplets to Form Target Triplet	Medium	62%	69.2%
#763	Partition Labels	Medium	62%	0.8%
#678	Valid Parenthesis String	Medium	61%	40.3%
#57	Insert Interval	Medium	61%	0.5%
#56	Merge Intervals	Medium	61%	0.5%
#435	Non-overlapping Intervals	Medium	60%	0.6%
#252	Meeting Rooms	Easy	60%	59.5%
#253	Meeting Rooms II	Medium	60%	0.5%
#1851	Minimum Interval to Include Each Query	Hard	60%	0.5%
#48	Rotate Image	Medium	59%	80.4%
#54	Spiral Matrix	Medium	59%	57.2%
#73	Set Matrix Zeroes	Medium	59%	63.3%
#202	Happy Number	Easy	58%	59.9%
#66	Plus One	Easy	58%	0.5%
#50	Pow(x, n)	Medium	58%	38.9%
#43	Multiply Strings	Medium	57%	44.4%
#2013	Detect Squares	Medium	57%	52.8%
#136	Single Number	Easy	57%	0.8%
#191	Number of 1 Bits	Easy	57%	77.1%
#338	Counting Bits	Easy	56%	0.8%
#190	Reverse Bits	Easy	56%	68.8%
#268	Missing Number	Easy	56%	72.3%
#371	Sum of Two Integers	Medium	55%	55.8%
#7	Reverse Integer	Medium	55%	32.1%

Showing 150 of 150 questionsWindow: All Time

NeetCode 150 Technical Interview Overview & Company-Wise Questions

Software engineering and technical interviews at NeetCode 150 emphasize real-world problem solving, algorithmic efficiency, and scalable data structure design. The curated dataset above contains 150 verified LeetCode problems, categorized by frequency and filtered across recent interview seasons.

Frequently Asked Questions

What are the top LeetCode questions for NeetCode 150?

Leading questions include Contains Duplicate, Valid Anagram, Two Sum. Reviewing questions with higher recency (within the last 30 to 90 days) yields the highest return on preparation time.

Where can I practice company-wise LeetCode questions for NeetCode 150?

You can practice all 150 NeetCode 150 LeetCode questions right here on LeetMap Pro. Filter by 30-day, 3-month, and 6-month recency, track your progress with local checkpoints, and practice curated SQL problems completely free.

How should I prepare for NeetCode 150 coding rounds?

Begin by reviewing Medium-difficulty problems (101 tracked), which constitute the majority of technical rounds. Complement coding practice with foundational DSA patterns like Sliding Window, Two Pointers, and Graph Traversal.

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Recommended Patterns

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