A NeetCode 150 study plan: 4, 8 or 12 weeks

A good NeetCode 150 study plan is not simply a race through a list of problems. It is a repeatable process for recognising patterns, implementing a solution, testing it and explaining your reasoning. This guide gives you routes through the NeetCode 150 schedule: an intensive four-week route, a balanced eight-week route and a slower twelve-week route.

The right pace depends on your current DSA knowledge, available study time and interview timeline. Whichever route you choose, use the same learning loop: solve, name the pattern, re-solve from memory a few days later and explain the approach out loud. The loop keeps retrieval and explanation in the plan rather than leaving them until the end.

This guide covers the NeetCode 150 list, practised on thita. Thita is not affiliated with NeetCode.

Which NeetCode 150 study plan suits you?

The list contains 150 problems: 28 Easy, 101 Medium and 21 Hard. Every problem on the list that is live on thita runs in the browser in Python, Java, C++, JavaScript, Go and C# against the problem’s test cases; the NeetCode 150 by pattern shows which ones are live. For problems not currently available on thita, use the same study process elsewhere without treating the platform catalogue as a complete copy of the list.

NeetCode 150 in 4 weeks

The NeetCode 150 in 4 weeks route suits someone with a near-term interview and a solid foundation in at least one programming language. It can also suit an experienced engineer who has already seen common patterns and wants a structured revision route rather than a first introduction.

This is the fastest pace in the plan. Protect study time consistently, expect some problems to receive a first pass rather than extended treatment, and use review sessions to identify patterns that still feel unfamiliar. It is a poor fit if arrays, recursion, graphs or dynamic programming are new to you.

Choose this route when your priority is broad coverage and a structured revision cycle. Keep a short record of problems that required hints, problems you could not re-solve and patterns you could not explain. Use that record to direct later review.

NeetCode 150 in 8 weeks

The NeetCode 150 in 8 weeks route is a middle pace between rapid coverage and extended study. It gives you room to learn a topic, attempt its problems, revisit difficult examples and include regular review days without making every session a cram session.

Choose eight weeks if you understand basic programming but still need to build reliable pattern recognition. It can also suit people studying alongside work, university or other interview preparation. Use the additional space to spend longer on graph traversal, backtracking and dynamic programming while keeping the NeetCode topic order.

Use the schedule to create feedback between attempts. A first attempt can expose a gap; a later re-solve lets you check whether you can reconstruct the approach without relying on the previous solution. If you repeatedly need to look at the same explanation, slow down and put the problem back into your review queue.

NeetCode 150 in 12 weeks

The NeetCode 150 in 12 weeks route suits beginners, career switchers and anyone who wants more time to build fundamentals. It also suits an interview timeline that allows deliberate practice rather than rapid coverage.

A longer route still requires active study. Use the extra space for implementation from a blank editor, complexity analysis, edge-case testing and verbal explanation. Use review days to mix older topics with the current topic, so that you practise recalling a technique without relying only on the topic label.

Choose twelve weeks if you are still becoming comfortable with recursion, pointers, trees or dynamic programming. A slower plan is useful only when you use it for repeated retrieval. Reading an explanation and moving on is not a substitute for solving.

What should your daily NeetCode 150 routine look like?

The daily routine should stay stable even when the workload changes between the four-week, eight-week and twelve-week schedules. The schedule sets the workload; the routine sets the learning process.

Start with a genuine attempt

Open the problem without immediately looking for an explanation. Read the constraints, clarify the input and output, and write down a simple example. Ask what information must be remembered while you scan, whether the input is sorted, whether a subproblem repeats and whether the answer can be built incrementally.

Try to produce a basic approach before searching for an efficient one. A brute-force idea can show what the optimised solution needs to avoid. Test your reasoning on normal cases, boundary cases, duplicates, empty inputs where relevant and the smallest useful input.

Do not measure progress only by whether your code passes. A submission that passes but cannot be explained still gives you a reason to revisit the problem before marking it complete.

Name the pattern

After solving, or after studying an explanation when you are stuck, name the underlying pattern in your own words. Examples include frequency counting, converging two pointers, a variable-size sliding window, a monotonic stack, binary search on an answer, fast and slow pointers, depth-first search, breadth-first search, union-find, a heap, backtracking or a dynamic-programming state.

Write notes that answer these questions:

• What clue suggests this pattern?
• What state or invariant does the algorithm maintain?
• What are the time and space complexities?

The NeetCode topic and thita pattern are useful labels, but do not let labels replace reasoning. The same broad technique can appear in different topics. For example, fast and slow pointers can occur in linked lists, cycle detection and other sequence problems.

The thita DSA patterns sheet groups problems into 99 DSA patterns in 16 families. That organisation lets you study by reusable technique as well as by the original NeetCode topic.

Re-solve from memory a few days later

Return to each problem a few days after the first attempt. Hide your previous code and notes. Read only the problem title or prompt, then reconstruct the approach from memory. If you remember only the final code, pause and recover the invariant, state definition or pointer movement before typing.

A successful re-solve should include the explanation, not just a familiar implementation. If you cannot reproduce the idea, mark the problem for another review. If you can solve it but make repeated edge-case errors, keep it in the review queue rather than treating it as finished.

Give this retrieval step particular attention for problems that use similar-looking techniques. Practise distinguishing when to use a stack from a queue, when a window should shrink and when a graph needs a visited set or a different traversal strategy.

Explain the solution out loud

Finish by explaining the problem as if an interviewer were listening. State the approach before coding, describe the invariant while coding, then give complexity and testing considerations. Speak in complete sentences rather than narrating every keystroke.

A useful explanation has this shape:

• Restate the goal and clarify assumptions.
• Describe the pattern and why it fits.
• Walk through the important state changes.
• Mention a small example or edge case.
• State time and space complexity.

If your explanation becomes vague, treat that as a reason to revisit the relevant step. You may have remembered a template without understanding why it works. Revisit the failed step, then explain it again without reading your notes.

What does the NeetCode 150 schedule look like?

The schedules below follow the NeetCode topic order. Use the route that matches your time and background, but do not interpret a weekly allocation as permission to skip review. Treat new problems as practice and review as retrieval.

The 4-week plan

Week	NeetCode topics	Problems	Per day (6 days)
1	Arrays & Hashing, Two Pointers, Sliding Window, Stack, Binary Search	34	6
2	Linked List, Trees, Heap / Priority Queue, Backtracking	42	7
3	Tries, Graphs, Advanced Graphs, 1-D Dynamic Programming	34	6
4	2-D Dynamic Programming, Greedy, Intervals, Math & Geometry, Bit Manipulation	40	7

The 8-week plan

Week	NeetCode topics	Problems	Per day (6 days)
1	Arrays & Hashing, Two Pointers, Sliding Window	20	4
2	Stack, Binary Search, Linked List	25	5
3	Trees	15	3
4	Heap / Priority Queue, Backtracking	16	3
5	Tries, Graphs	16	3
6	Advanced Graphs, 1-D Dynamic Programming	18	3
7	2-D Dynamic Programming, Greedy	19	4
8	Intervals, Math & Geometry, Bit Manipulation	21	4

The 12-week plan

Week	NeetCode topics	Problems	Per day (6 days)
1	Arrays & Hashing	9	2
2	Two Pointers, Sliding Window	11	2
3	Stack, Binary Search	14	3
4	Linked List	11	2
5	Trees	15	3
6	Heap / Priority Queue	7	2
7	Backtracking, Tries	12	2
8	Graphs	13	3
9	Advanced Graphs, 1-D Dynamic Programming	18	3
10	2-D Dynamic Programming	11	2
11	Greedy, Intervals	14	3
12	Math & Geometry, Bit Manipulation	15	3

The inserted tables keep the NeetCode topic order, from arrays and hashing through pointers, windows, stacks, search, linked lists, trees, heaps, backtracking, tries, graphs, dynamic programming, greedy techniques, intervals, mathematics and bit manipulation.

You can also use the NeetCode 150 by pattern on thita to see each problem under a thita pattern, with the NeetCode topic shown as a tag. This makes it easier to compare the topic-based roadmap with the pattern you are studying.

What should you do on review days?

A review day is not a day for passively rereading completed solutions. Use it as a retrieval and diagnosis session.

Begin with problems from recent study days. Attempt them from a blank editor and explain the approach before running the code. Then select older problems from different topics. Mixed-topic review asks you to identify the technique from the problem rather than relying on the topic label.

For each review problem, classify the result:

• Independent: you identified the pattern, implemented it and explained it.
• Partial: the main idea was right, but the implementation or complexity analysis failed.
• Blocked: you could not identify a useful approach without help.

Keep independent problems in a light maintenance rotation. Revisit partial problems soon and write down the precise failure. For blocked problems, study an explanation, close it and implement the approach from memory. Avoid copying code line by line.

Review days are also a good time to compare related patterns. Contrast fixed and variable sliding windows, recursive and iterative tree traversal, breadth-first and depth-first graph search, and one-dimensional with two-dimensional dynamic programming. Ask what changes in the state, what stays invariant and what makes the complexity acceptable.

Use review days to practise communication as well. Explain a problem without looking at notes, including why a tempting alternative is unsuitable. If you are preparing for live interviews, use this exercise to practise responding to conversation and follow-up questions.

For a broader revision method, see How to Revise DSA Efficiently Before Interviews.

What should you do if you fall behind?

Do not respond to a missed study day by automatically doubling the next day’s workload. First identify the cause: an unrealistic pace, a difficult topic, unclear fundamentals or a temporary interruption.

If the problem was scheduling, move the remaining plan forward and preserve review days. If the problem was one difficult topic, reduce new problems temporarily and spend a session rebuilding the relevant pattern. If you are close to an interview, prioritise the problems you marked as partial or blocked instead of chasing a perfect completion record.

Recovery options include:

• Continue at the same pace and extend the end date.
• Move from the four-week route to the eight-week route, or from the eight-week route to the twelve-week route.
• Keep the topic order but reduce breadth in topics you already know, preserving time for unfamiliar patterns.
• Complete a first pass, then schedule a separate review phase instead of treating first-pass exposure as mastery.

Do not skip the re-solve step to make the tracker look current. Record what you can explain and implement, not only what you opened. Also avoid switching between several lists whenever you encounter difficulty. Finish a coherent route before deciding whether you need additional coverage.

If you are making repeated beginner mistakes, Beginner Mistakes While Learning Data Structures and Algorithms can help you audit your process.

How do you run this plan on thita?

Start with the sheet filtered to the NeetCode 150 list. The sheet can be filtered to the list, while thita’s pattern-based organisation and NeetCode topic tag keep the study view connected to the schedule. Use the NeetCode topic tag to stay aligned with the tables, and use the thita pattern to record the technique you recognised.

Open a problem where it is available on thita and write your solution in the browser. Choose the language you plan to use in interviews, or use another supported language when you are learning how the implementation differs. Run the code against the problem’s test cases, inspect failures and correct the implementation before recording your explanation.

The NeetCode 150 by pattern is useful when you want the list view and topic structure. The filtered sheet is useful when you want to move between related patterns. Use both views deliberately: one preserves the roadmap, while the other reinforces transferable technique.

For problems that are not currently on thita, keep them in your study record and apply the same routine: attempt, identify the pattern, test carefully, re-solve from memory and explain aloud. Do not assume that an unavailable problem is unimportant; availability and learning value are different questions.

In the last week or two of your plan, add spoken practice with Thita’s AI mock interview. It asks follow-up questions and runs your code, so use it to practise more than silent implementation. State assumptions, discuss trade-offs, respond to a changed requirement and explain complexity while working. Review where your communication broke down as well as where the code failed.

Use mock interviews after you have enough patterns to discuss. They should expose gaps and interview habits, not replace the initial learning loop. If a mock reveals that you cannot explain a pattern, return to the corresponding problems and re-solve them aloud.

How should you choose between the three routes?

Choose four weeks when your interview is close, your fundamentals are established and you can sustain an intensive revision cycle. Choose eight weeks when you want a balanced path that combines coverage, retrieval and communication practice. Choose twelve weeks when you are building DSA foundations or need more time for repeated, deliberate re-solving.

Whichever route you choose, set a start date, follow the NeetCode topic order, protect review days and keep a record of patterns rather than only completion status. The aim of this NeetCode roadmap is to practise recognising an unfamiliar problem, choosing a defensible approach, implementing it correctly, testing it and explaining it clearly under interview conditions.

Use the plan as a fixed route with repeated retrieval and spoken practice. That structure keeps the study process focused on solving, pattern recognition, re-solving and explanation rather than completion status alone.