NeetCode 250 is the longer list on NeetCode's practice page: all of NeetCode 150 plus 100 more problems, in the same 18 categories and with a video for each. The question is whether those 100 are worth roughly 65 to 90 more hours. This page shows what the extra problems add by topic, how much time they take and when the longer list pays off. Guides: our NeetCode 250 guide and NeetCode 150 roadmap.
The two lists side by side
Counts were read from each list's own site data in November 2026. Lists are edited from time to time, so numbers can drift.
| NeetCode 150 | NeetCode 250 | |
|---|---|---|
| Problems | 150 | 250 (all 150, plus 100) |
| Easy / Medium / Hard | 28 / 101 / 21 | 60 / 155 / 35 |
| Categories | 18 | The same 18 |
| Videos | One per problem | One per problem |
What the extra 100 problems add
The additions are 32 easy, 54 medium and 14 hard problems. By category:
| Category | Added | Examples |
|---|---|---|
| Arrays and hashing | 13 | Design HashMap, Sort an Array, Subarray Sum Equals K, First Missing Positive |
| Two pointers and sliding window | 11 | 4Sum, Rotate Array, Boats to Save People, Minimum Size Subarray Sum |
| Stack | 8 | Asteroid Collision, Decode String, Maximum Frequency Stack |
| Binary search | 7 | Capacity to Ship Packages, Split Array Largest Sum, Find in Mountain Array |
| Linked list and trees | 11 | LFU Cache, Delete Node in a BST, House Robber III |
| Heap and backtracking | 12 | IPO, Single-Threaded CPU, Matchsticks to Square, N-Queens II, Word Break II |
| Graphs and advanced graphs | 12 | Accounts Merge, Evaluate Division, Path With Minimum Effort, critical edges in a minimum spanning tree |
| Dynamic programming | 10 | Perfect Squares, Stone Game I to III, Combination Sum IV |
| Greedy, intervals, tries, math and bits | 16 | Candy, Meeting Rooms III, Roman to Integer, Minimum Array End |
What that means in practice
- More easy problems: a third of the additions are easy, such as Concatenation of Array and Baseball Game. They make NeetCode 250 friendlier for beginners, not just longer.
- More design and data-structure problems: Design HashMap, LFU Cache, Design Circular Queue and Implement Stack using Queues, which appear in practical rounds.
- Harder graphs: six of the ten advanced graph problems in NeetCode 250 are hard, against three of six in NeetCode 150.
- Overlap with other lists: 43 of the 100 additions also appear in Grind's pool, Top Interview 150 or LeetCode 75; 25 are in Top Interview 150.
How much time the extra problems take
| Added problems | Count | Our estimate with review |
|---|---|---|
| Easy | 32 | 11 to 16 hours |
| Medium | 54 | 40 to 54 hours |
| Hard | 14 | 14 to 21 hours |
| Total | 100 | About 65 to 90 hours |
These use the same per-problem estimates as how long NeetCode 150 takes: 20 to 30 minutes for an easy, 45 to 60 for a medium and 60 to 90 for a hard, including review. At 15 hours a week, that is four to six more weeks.
When the longer list is worth it
- Worth it: you have three months or more, you are new to data structures and want the easy ramps, or you target companies known for hard graph and dynamic programming rounds.
- Not worth it: your interview is within six weeks. Finishing NeetCode 150, or the shorter Blind 75 guide, properly beats a rushed pass over 250.
- A middle path: do NeetCode 150, then only the additions in your two weakest categories, about 20 to 25 problems.
Turning a list into interview skill
Any list only helps if the practice transfers to problems you have not seen. These habits make the difference:
- Time-box every attempt: about 25 minutes for a medium before you read a solution.
- Keep a log with one line per problem: the pattern, the key idea and the complexity.
- Redo failed problems after three days, a week and three weeks, without looking at your old code.
- Explain your approach out loud before and while you code, as you would to an interviewer.
- In the last two weeks, switch to unseen problems without topic labels.
The patterns most lists are built on are explained in array and string patterns and tree, graph and recursion patterns.
Where CoPilot Interview fits
Finishing a list is not the same as passing an interview: interviewers score how you explain your approach, your trade-offs and your complexity out loud. CoPilot Interview is an interview copilot; its free AI mock interview asks coding questions, listens to your spoken explanation and scores it out of ten with a model answer, which is the part a problem list cannot train. The free plan gives 15 minutes a day of live help in sessions of up to 15 minutes, with AI mock interviews included. Online assessments and live coding rounds usually forbid outside help, so practice now and follow your employer's rules on the day.
Disclosure: CoPilot Interview is our product, so weigh what we say about it accordingly.
Frequently asked questions
How many problems does NeetCode 250 add to NeetCode 150?
100: 32 easy, 54 medium and 14 hard, according to NeetCode's practice data in November 2026. All 150 NeetCode 150 problems are included.
Is NeetCode 250 worth it?
If you have three months or more, or need more easy ramps and hard graph practice, yes. With under six weeks, finish NeetCode 150 well instead.
How long do the extra 100 problems take?
About 65 to 90 hours with review by our estimate, or four to six weeks at 15 hours a week.
Does NeetCode 250 have videos for every problem?
Yes. NeetCode's practice data lists a video for all 250 problems.
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