This list is widely used by students and working professionals because it focuses on important problem-solving patterns, not random questions.

You don’t need to solve thousands of problems — these 75 are enough if done properly.

This blog is written in a simple to medium level, perfect for

	•	Beginners who know basic DSA
	•	Students preparing for placements
	•	Developers preparing for interviews

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🔗 Official Blind 75 References

You can practice directly using these trusted links

	•	Official Blind 75 List:

https://leetcode.com/problem-list/oizxjoit/ 

	•	LeetCode 75 Study Plan:

https://leetcode.com/studyplan/leetcode-75/ 

	•	NeetCode Blind 75 Dashboard:

https://neetcode.io/practice/practice/blind75

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🧠 What Is the Blind 75 List?

The Blind 75 is a curated set of problems that covers all core DSA topics, such as

	•	Arrays and Strings
	•	Linked Lists
	•	Stack and Queue
	•	Trees and Graphs
	•	Recursion and Backtracking
	•	Dynamic Programming

Each problem helps you understand how to think, not just how to code.

💡 If you understand the patterns behind these problems, you can solve many similar interview questions.

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📚 Topic-Wise Breakdown (Medium Level Explanation)

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📌 Arrays & Strings

These problems teach how to work with indexes, loops, and conditions efficiently.

Common patterns you will learn

	•	Two pointers
	•	Sliding window
	•	Prefix and suffix arrays

Example problems

	•	Two Sum
	•	Maximum Subarray
	•	Product of Array Except Self

Why important?

👉 Arrays are asked in almost every interview, even in advanced rounds.

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📌 Hashing

Hashing helps reduce time complexity using HashMap / Set.

You will learn

	•	Frequency counting
	•	Removing duplicates
	•	Fast lookups (O(1))

Example problems

	•	Valid Anagram
	•	Group Anagrams
	•	Top K Frequent Elements

Why important?

👉 Hashing converts brute force solutions into optimized ones.

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📌 Linked List

Linked list problems improve your understanding of pointers and memory.

You will learn

	•	Fast and slow pointer technique
	•	In-place reversal
	•	Cycle detection

Example problems

	•	Reverse Linked List
	•	Linked List Cycle
	•	Merge Two Sorted Lists

Why important?

👉 Many interviewers use linked lists to test edge-case handling.

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📌 Stack

Stack problems help you understand order and state tracking.

You will learn

	•	LIFO concept
	•	Monotonic stack
	•	Expression evaluation

Example problems

	•	Valid Parentheses
	•	Min Stack
	•	Daily Temperatures

Why important?

👉 Stack problems are very common in medium-level interviews.

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📌 Binary Search

Binary search is not only for searching numbers.

You will learn

	•	Searching in sorted space
	•	Binary search on answer
	•	Reducing time complexity

Example problems

	•	Binary Search
	•	Search in Rotated Sorted Array
	•	Koko Eating Bananas

Why important?

👉 Many problems look hard until you realize binary search can be applied.

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📌 Trees

Tree problems teach recursion and traversal logic.

You will learn

	•	DFS and BFS
	•	Tree traversals
	•	Recursive thinking

Example problems

	•	Invert Binary Tree
	•	Maximum Depth of Binary Tree
	•	Level Order Traversal

Why important?

👉 Trees are a favorite topic in technical interviews.

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📌 Backtracking

Backtracking problems train your brain to explore all possible choices.

You will learn

	•	Recursion tree
	•	Decision making
	•	Undoing choices

Example problems

	•	Subsets
	•	Permutations
	•	Combination Sum

Why important?

👉 Backtracking builds strong problem-solving intuition.

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📌 Graphs

Graph problems focus on connections and traversal.

You will learn

	•	BFS and DFS
	•	Connected components
	•	Cycle detection

Example problems

	•	Number of Islands
	•	Course Schedule
	•	Clone Graph

Why important?

👉 Graphs appear often in real-world interview scenarios.

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📌 Dynamic Programming (DP)

DP problems are considered medium to hard but very important.

You will learn

	•	Breaking problems into subproblems
	•	Memoization and tabulation
	•	Optimal solutions

Example problems

	•	Climbing Stairs
	•	House Robber
	•	Coin Change

Why important?

👉 DP separates average candidates from strong ones.

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🧩 How to Study the Blind 75 (Simple Plan)
	•	Solve 1–2 problems per day
	•	First think of a brute force solution
	•	Then optimize using patterns
	•	Write code without copying
	•	Revise after 7 days

📅 Recommended time: 30–45 days

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🎯 Who Should Follow This List?

	•	Students preparing for placements
	•	Beginners who know basic DSA
	•	Developers preparing for interviews
	•	Anyone confused about what to practice next

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🏁 Final Thoughts

You don’t need to solve every LeetCode problem.

Solving the right problems deeply is enough.

The LeetCode Blind 75 gives you a clear, structured path for DSA interview preparation.

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📌 Disclaimer

LeetCode® is a registered trademark of LeetCode, Inc.

All problem names and links are shared for educational and reference purposes only.

This website is not affiliated with or endorsed by LeetCode.