NeetCode 150 vs NeetCode 250 vs Blind 75: which should you do?

If your interview date is approaching, the NeetCode 150 vs NeetCode 250 vs Blind 75 decision is practical rather than theoretical. You need a defined scope, deliberate practice and enough time to revise. The short answer is: choose Blind 75 when you have under 4 weeks, choose the NeetCode 150 list, practised on thita, for a broader general-purpose route, and choose NeetCode 250 when you have 3+ months for additional coverage.

The lists are nested rather than completely separate collections. Every Blind 75 problem is in the NeetCode 150, and every NeetCode 150 problem is in the NeetCode 250. You are choosing a stopping point within the same progression, not starting a different curriculum each time.

Thita is not affiliated with NeetCode.

NeetCode 150 vs NeetCode 250 vs Blind 75: what is different?

Blind 75 contains 75 problems: 19 Easy, 49 Medium and 7 Hard. Every Blind 75 problem is included in the NeetCode 150. It is the smallest scope of the three lists, so it is the natural option when your preparation window is very short.

The NeetCode 150 contains 150 problems: 28 Easy, 101 Medium and 21 Hard. It includes all of Blind 75 and adds broader coverage across the same NeetCode topics. The NeetCode 150 by pattern shows which of them are live on thita.

The NeetCode 250 contains 250 problems: 60 Easy, 155 Medium and 35 Hard. It contains all of the NeetCode 150 plus 100 more problems: 32 Easy, 54 Medium and 14 Hard. The NeetCode 250 by pattern shows which of them are live on thita.

Blind 75 was posted on Blind by Yangshun Tay in 2018. For this comparison, its relevant relationship is that every problem is contained in the NeetCode 150.

List	Total problems	Easy	Medium	Hard	Relationship
Blind 75	75	19	49	7	Every problem is in the NeetCode 150
NeetCode 150	150	28	101	21	Contains all of Blind 75 and is contained in the NeetCode 250
NeetCode 250	250	60	155	35	Contains all of the NeetCode 150 plus 100 more

The difficulty mix matters when you choose a scope. Blind 75 has Medium as its largest category, with a smaller Easy foundation and Hard section. NeetCode 150 increases the number of problems in every difficulty category. NeetCode 250 adds more Easy, Medium and Hard problems again; its extra 100 are not simply harder questions.

NeetCode 150 vs NeetCode 250 vs Blind 75: which should you choose?

The time recommendation is straightforward:

• Under 4 weeks: choose Blind 75 and reserve time for revision, implementation and interview-style practice.
• 1–2 months: choose the NeetCode 150 list, practised on thita, as the default scope.
• 3+ months: choose NeetCode 250 if you can maintain revision while covering its additional problems.

Your starting level changes how you use that scope. A complete beginner may need to learn core data structures and algorithmic techniques alongside the list. Someone with a strong DSA foundation can use Blind 75 as a refresh, the NeetCode 150 as a broader revision boundary or NeetCode 250 for additional practice.

The nesting gives you flexibility. If you choose Blind 75 and finish with time remaining, move selectively into the NeetCode 150. If you choose NeetCode 250, do not let the larger scope replace revision of the problems and patterns you have already studied.

What does each list add by NeetCode topic?

The exact topic counts show where the additional scope sits. Each line gives the count for NeetCode 150, NeetCode 250 and Blind 75 in that order:

• Arrays & Hashing: 9 / 22 / 8
• Two Pointers: 5 / 13 / 3
• Sliding Window: 6 / 9 / 4
• Stack: 7 / 15 / 1
• Binary Search: 7 / 14 / 2
• Linked List: 11 / 14 / 6
• Trees: 15 / 23 / 11
• Heap / Priority Queue: 7 / 12 / 1
• Backtracking: 9 / 16 / 2
• Tries: 3 / 4 / 3
• Graphs: 13 / 21 / 6
• Advanced Graphs: 6 / 10 / 1
• 1-D Dynamic Programming: 12 / 17 / 10
• 2-D Dynamic Programming: 11 / 16 / 2
• Greedy: 8 / 14 / 2
• Intervals: 6 / 7 / 5
• Math & Geometry: 8 / 13 / 3
• Bit Manipulation: 7 / 10 / 5

What does Blind 75 cover?

Blind 75 has its largest topic counts in Trees, with 11, and 1-D Dynamic Programming, with 10. It also includes 8 Arrays & Hashing problems, 6 Linked List problems, 6 Graphs problems and 5 Intervals problems. Sliding Window has 4, while Two Pointers has 3.

The list has limited representation in some topics. Stack has 1 problem, Heap / Priority Queue has 1, Advanced Graphs has 1 and 2-D Dynamic Programming has 2. Tries has 3, matching the NeetCode 150 count for that topic. This makes Blind 75 a focused scope rather than a broad treatment of every topic variation.

What does the NeetCode 150 add?

The NeetCode 150 provides more examples across the listed topics. Trees has 15 problems, Graphs has 13, 1-D Dynamic Programming has 12, Linked List has 11 and 2-D Dynamic Programming has 11. Arrays & Hashing and Backtracking each have 9.

The list also gives more room to topics that have limited representation in Blind 75. Stack, Heap / Priority Queue, Binary Search and Bit Manipulation each have 7 problems. Advanced Graphs has 6, while Intervals has 6. This makes the NeetCode 150 a useful middle scope when you want more topic coverage without taking on all 250 problems.

What does the NeetCode 250 add?

The NeetCode 250 has a higher count than the NeetCode 150 in every listed topic. Its largest topic counts are Trees at 23, Arrays & Hashing at 22 and Graphs at 21. Backtracking and 2-D Dynamic Programming each have 16, while Stack has 15 and Greedy has 14.

The expansion also reaches topics that can receive less attention in a short study plan. Heap / Priority Queue has 12, Advanced Graphs has 10, Bit Manipulation has 10 and Sliding Window has 9. Tries increases from 3 in the NeetCode 150 to 4, and Intervals increases from 6 to 7.

The extra problems are useful when you need more examples within a topic or want to practise without relying on the exact wording of a familiar question. They are not a substitute for being able to explain and reproduce the approaches you have already studied.

Which list should you choose with under 4 weeks?

Choose Blind 75 when your interview is under 4 weeks away and your preparation time is constrained. The goal should not be to mark all 75 as complete without understanding them. Try each problem, identify the pattern, implement the approach in your interview language, test edge cases and revisit problems that needed help.

Begin with the topics that are least familiar, but use the topic counts to avoid assuming that Blind 75 gives equal coverage everywhere. If arrays, hash maps, two pointers or sliding windows are unfamiliar, establish those foundations before spending much time on harder graph or dynamic-programming questions. If those foundations are already comfortable, use Blind 75 to identify gaps rather than treating every Easy problem as compulsory in a fixed order.

A short preparation window also makes revision important. Reading a solution is not the same as being able to explain the invariant, write the implementation and discuss complexity. Every problem on these lists that is live on thita runs in the browser in Python, Java, C++, JavaScript, Go and C# against the problem’s test cases, so you can check the implementation directly.

If you complete the Blind 75 scope with time remaining, select NeetCode 150 problems from topics that Blind 75 represents lightly. Do not restart the larger list automatically; use the extra time to address a specific gap.

Which list should you choose with 1–2 months?

Choose the NeetCode 150 list, practised on thita, when you have 1–2 months. It retains every Blind 75 problem, contains 150 problems overall and gives broader representation across the NeetCode topics. Its difficulty mix is 28 Easy, 101 Medium and 21 Hard.

Work through the list in stages that include solving, review and retrieval. Early in preparation, focus on understanding the main pattern behind each problem. Later, return to problems that required substantial help, exposed a gap in complexity analysis or produced code you could not explain clearly. As the interview approaches, use timed practice and mock interviews rather than continuing to expand the problem scope indefinitely.

The NeetCode 150 is also a sensible default when you do not yet know which topics will receive emphasis. It includes 15 Trees problems, 13 Graphs problems, 12 1-D Dynamic Programming problems, 11 Linked List problems and 11 2-D Dynamic Programming problems. It also gives more coverage than Blind 75 in Stack, Heap / Priority Queue, Binary Search and Backtracking.

Use the NeetCode 150 by pattern on thita to see the available problems. Thita places each problem under its DSA pattern and keeps NeetCode’s topic as a tag. The list can define your scope while the pattern provides the structure for learning and revision.

Which list should you choose with 3+ months?

Choose NeetCode 250 when you have 3+ months and can maintain revision while working through its 250 problems. The list contains the NeetCode 150 plus 100 more: 32 Easy, 54 Medium and 14 Hard. Its topic counts are higher than the NeetCode 150 in every listed topic.

Use the additional scope to strengthen weak areas rather than treating it as a race to record solved labels. For example, the NeetCode 250 has 22 Arrays & Hashing problems, 23 Trees problems and 21 Graphs problems. It also has 16 Backtracking problems and 16 2-D Dynamic Programming problems. These counts give you more material within those topics, but the value comes from understanding the approaches and revisiting them.

A practical sequence is to begin with the scope you can study consistently, continue through the NeetCode 150 and then use the additional NeetCode 250 problems for topics that need more work. Mix new problems with review so that your recognition does not depend on seeing a topic heading first.

The NeetCode 250 by pattern on thita shows the larger scope. You can also filter the DSA patterns sheet to a list: NeetCode 150 filter and NeetCode 250 filter.

Which list fits your starting level?

If you are a complete beginner

If the interview is under 4 weeks away, choose Blind 75 and keep the scope focused. If you have more time, learn the foundations alongside a list rather than assuming that problem exposure alone will teach every data structure and technique.

With 1–2 months, use the NeetCode 150 as a pattern-based curriculum. You may need to study explanations for some problems, but rewrite the approach yourself, test it and explain why it works. With 3+ months, use NeetCode 250 as a longer route after establishing the foundations; the extra problems should reinforce understanding rather than replace it.

If you have solved some interview problems

The NeetCode 150 is the clearest default. It gives you the nested Blind 75 scope plus additional examples across the topic list. Use Blind 75 as a compact diagnostic if you want to identify gaps quickly, then continue into the NeetCode 150 areas that need more practice.

With 3+ months, NeetCode 250 can provide additional material within topics such as Arrays & Hashing, Trees, Graphs, Backtracking and dynamic programming. Record whether you solved a problem independently, needed a hint or needed to study an explanation. That record describes the quality of your preparation more clearly than a solved label alone, without turning preparation into a competition with the list.

If you already have a strong DSA foundation

Choose according to the available time and the areas you need to refresh. Blind 75 is a compact refresh under 4 weeks if you can solve its problems and explain the approaches without relying on solutions. The NeetCode 150 is a broader revision boundary with 1–2 months. NeetCode 250 is the extended option with 3+ months when you want more examples within the listed topics.

At this level, use the Easy problems to check implementation and speed, then spend more review time on Medium and Hard problems that test pattern selection, invariants and complexity trade-offs. The difficulty mix in the table can help you choose the scope without assuming that a larger list automatically means better preparation.

Why does grouping by pattern matter whichever list you pick?

A NeetCode topic gives you a broad subject. A pattern describes the reasoning structure that may lead to a solution. The Arrays & Hashing topic, for example, includes frequency counting, top-K selection, design and prefix or suffix product approaches in the catalogue. Knowing the topic does not by itself tell you which technique to use.

Grouping by pattern gives you a way to compare related approaches and identify the information an algorithm must maintain. It also lets you practise the same reasoning structure across different problem statements instead of memorising a solution tied to a single title.

Thita groups problems into 99 DSA patterns in 16 families. The NeetCode 150 and NeetCode 250 sheets show each problem under its thita pattern while retaining NeetCode’s topic as a tag. You can therefore keep the familiar NeetCode scope and use pattern families to organise learning, review and mock practice.

In a pattern-based session, ask:

• What information must the algorithm maintain?
• What condition makes the window, pointer, state or traversal move?
• What invariant remains true after each step?
• What are the time and space complexities, and what would change under a follow-up?

After learning a pattern, mix problems from related patterns rather than solving only under a visible topic heading. Then practise selecting the approach without seeing the topic first. This keeps the list as a scope guide while testing whether you can recognise the relevant structure independently.

For the deeper list-versus-pattern argument, read Blind 75 vs NeetCode vs Pattern-Based Preparation: Full Comparison. The practical conclusion is not to choose between lists and patterns: use the list to define what you will cover and patterns to organise how you learn it.

How should you practise the list on thita?

Start with the list that matches your time and starting level. For each problem, clarify assumptions, describe a straightforward approach, improve it where appropriate, state the invariant, code carefully and test edge cases. Review an editorial only after making a genuine attempt, then write the approach again without copying it.

Every problem on these lists that is live on thita runs in the browser in Python, Java, C++, JavaScript, Go and C# against the problem’s test cases. That lets you verify whether your implementation behaves as intended rather than relying on code that only appears plausible. You can also use the AI mock interview to practise a spoken interview that runs your code and asks follow-ups.

As the interview approaches, reduce the emphasis on new problems and increase retrieval practice. Re-solve representative problems from weak patterns, explain complexity aloud and practise recovering when an initial approach fails. The aim is not to remember every line. It is to recognise constraints, choose a defensible approach and communicate while implementing it.

Final decision: which NeetCode list should you do?

• Under 4 weeks: choose Blind 75, prioritise understanding and revision, and add selected NeetCode 150 problems only if you finish the core scope with time remaining.
• 1–2 months: choose the NeetCode 150 list, practised on thita. It contains Blind 75 and gives broader topic coverage without the full NeetCode 250 scope.
• 3+ months: choose NeetCode 250 if you can maintain revision; otherwise, choose the NeetCode 150 and study it more deeply.
• Complete beginner: learn the foundations alongside the list and organise practice by pattern.
• Some experience: use the NeetCode 150 as the default, Blind 75 for a compact diagnostic and NeetCode 250 for extended practice.
• Strong foundation: use Blind 75 for a short refresh, the NeetCode 150 for broader revision and NeetCode 250 for additional topic coverage.

The nesting means that your choice is adjustable. Start with the largest scope your time allows, practise by pattern and stop expanding when revision and interview simulation are more valuable than another new problem.