Neetcode 150 DSA Sheet

A clean, beginner-friendly list of the most important interview problems for fast revision.

By Navdeep Singh (NeetCode) · 150 Problems

Total Problems: 150Difficulty Levels:EasyMediumHard

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Contains Duplicate

LeetCode•Easy

Valid Anagram

LeetCode•Easy

Two Sum

LeetCode•Easy

Group Anagrams

LeetCode•Medium

Top K Frequent Elements

LeetCode•Medium

Encode and Decode Strings

LeetCode•Medium

Product of Array Except Self

LeetCode•Medium

Valid Sudoku

LeetCode•Medium

Longest Consecutive Sequence

LeetCode•Medium

Reverse Linked List

LeetCode•Easy

Reorder List

LeetCode•Medium

Merge Two Sorted Lists

LeetCode•Easy

Remove Nth Node From End of List

LeetCode•Medium

Copy List with Random Pointer

LeetCode•Medium

Add Two Numbers

LeetCode•Medium

Linked List Cycle

LeetCode•Easy

LRU Cache

LeetCode•Medium

Find the Duplicate Number

LeetCode•Medium

Merge k Sorted Lists

LeetCode•Hard

Reverse Nodes in k-Group

LeetCode•Hard

Invert Binary Tree

LeetCode•Easy

Maximum Depth of Binary Tree

LeetCode•Easy

Diameter of Binary Tree

LeetCode•Easy

Balanced Binary Tree

LeetCode•Easy

Same Tree

LeetCode•Easy

Subtree of Another Tree

LeetCode•Easy

Lowest Common Ancestor of a Binary Search Tree

LeetCode•Medium

Binary Tree Level Order Traversal

LeetCode•Medium

Binary Tree Right Side View

LeetCode•Medium

Count Good Nodes in Binary Tree

LeetCode•Medium

Validate Binary Search Tree

LeetCode•Medium

Kth Smallest Element in a BST

LeetCode•Medium

Construct Binary Tree from Preorder and Inorder Traversal

LeetCode•Medium

Binary Tree Maximum Path Sum

LeetCode•Hard

Serialize and Deserialize Binary Tree

LeetCode•Hard

Number of Islands

LeetCode•Medium

Max Area of Island

LeetCode•Medium

Clone Graph

LeetCode•Medium

Walls and Gates

LeetCode•Medium

Rotting Oranges

LeetCode•Medium

Pacific Atlantic Water Flow

LeetCode•Medium

Surrounded Regions

LeetCode•Medium

Course Schedule

LeetCode•Medium

Course Schedule II

LeetCode•Medium

Graph Valid Tree

LeetCode•Medium

Number of Connected Components in an Undirected Graph

LeetCode•Medium

Word Ladder

LeetCode•Hard

Redundant Connection

LeetCode•Medium

Climbing Stairs

LeetCode•Easy

Min Cost Climbing Stairs

LeetCode•Easy

House Robber

LeetCode•Medium

House Robber II

LeetCode•Medium

Longest Palindromic Substring

LeetCode•Medium

Palindromic Substrings

LeetCode•Medium

Decode Ways

LeetCode•Medium

Coin Change

LeetCode•Medium

Maximum Product Subarray

LeetCode•Medium

Word Break

LeetCode•Medium

Longest Increasing Subsequence

LeetCode•Medium

Partition Equal Subset Sum

LeetCode•Medium

Unique Paths

LeetCode•Medium

Longest Common Subsequence

LeetCode•Medium

Best Time to Buy and Sell Stock with Cooldown

LeetCode•Medium

Coin Change II

LeetCode•Medium

Target Sum

LeetCode•Medium

Interleaving String

LeetCode•Medium

Longest Increasing Path in a Matrix

LeetCode•Hard

Distinct Subsequences

LeetCode•Hard

Edit Distance

LeetCode•Medium

Burst Balloons

LeetCode•Hard

Regular Expression Matching

LeetCode•Hard

Frequently asked questions

What is the NeetCode 150 DSA Sheet?

A curated list of 150 of the most commonly asked coding interview problems, created by NeetCode (Navdeep Singh) and organized by algorithmic pattern for fast, focused revision.

How many problems does it have?

150 problems across 18 pattern-based sections (arrays & hashing, two pointers, sliding window, and more).

Is it free to use?

Yes. Browsing every problem on this page is completely free, with no account required. Creating a free DevsUnite account lets you save your checked-off progress, star favorites, and add personal notes that sync across devices.

Do I need an account to track my progress?

You can read and solve every problem without logging in. An account is only required to mark a problem as done, star it, or add a note. Those actions save to your account instead of resetting on refresh.