LeetCode 75 and Blind 75 have the same length and very different content. LeetCode 75 is LeetCode's own free study plan, built around many recent, mostly easier problems; Blind 75 is the older community list built around classic interview problems. They share only ten problems. This page compares their topics, difficulty, structure and time, and says which to start with. Guides: our LeetCode 75 guide and Blind 75 guide.
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. Overlap figures are our own counts, matched by LeetCode problem.
| LeetCode 75 | Blind 75 | |
|---|---|---|
| Problems | 75 | 75 |
| Easy / Medium / Hard | 22 / 53 / 0 | 19 / 49 / 7 |
| Premium problems | 0 | 6 |
| Groups | 22 groups of 2 to 9 problems | No official groups; NeetCode sorts it into 18 categories |
| Where it lives | Inside LeetCode, with progress tracking | A list of links, mirrored on many sites |
| Contained in NeetCode 150 | 20 of 75 | All 75 |
How much they overlap
Only 10 problems are in both: Product of Array Except Self, Container With Most Water, Reverse Linked List, Maximum Depth of Binary Tree, Implement Trie, House Robber, Unique Paths, Longest Common Subsequence, Non-overlapping Intervals and Counting Bits. Doing both lists gives you 140 distinct problems, so they complement each other rather than repeat.
Where they differ
- Difficulty: LeetCode 75 has no hard problems. Blind 75 has seven, including Minimum Window Substring, Merge k Sorted Lists, Word Search II and Serialize and Deserialize Binary Tree.
- Topics LeetCode 75 adds: separate groups for prefix sums, queues, monotonic stacks and graph BFS, with problems such as Asteroid Collision, Dota2 Senate, Daily Temperatures and Rotting Oranges.
- Topics Blind 75 covers better: dynamic programming (12 problems against LeetCode 75's 8), trees and tries (14 against 12), and classic graph problems such as Course Schedule, Pacific Atlantic Water Flow and Alien Dictionary.
- Age: 28 of LeetCode 75's problems have four-digit problem numbers, so they were added to LeetCode more recently, while Blind 75 is mostly older classics that appear in many solution guides and videos.
How long each takes
- LeetCode 75: two to three weeks at three or four problems a day for most people with some practice, since it has no hard problems.
- Blind 75: three to five weeks at a similar pace; the hard problems and dynamic programming take the most time.
- These are our estimates, based on typical solve and review times. Neither list publishes one.
Which to start with
- Rusty or new to interviews: LeetCode 75 first, as a confidence-building warm-up, then Blind 75.
- Interview in under three weeks: Blind 75, because its hard and classic problems are closer to real rounds.
- No Premium subscription: LeetCode 75 is fully free; Blind 75's six Premium problems have free versions on other sites.
- Want one plan in LeetCode's interface: LeetCode 75, then the other LeetCode plans described in LeetCode study plans explained.
For a three-way comparison including NeetCode 150, see NeetCode 150 vs Blind 75 vs LeetCode 75.
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 do LeetCode 75 and Blind 75 share?
Ten, by our count of both lists in November 2026.
Is LeetCode 75 easier than Blind 75?
Yes. LeetCode 75 has 22 easy and 53 medium problems and no hard ones; Blind 75 has 19 easy, 49 medium and 7 hard.
Should I do LeetCode 75 or Blind 75 first?
LeetCode 75 if you are rusty, Blind 75 if your interview is soon. Doing both gives 140 distinct problems.
Does LeetCode 75 need Premium?
No. All 75 problems are free. Blind 75 includes six Premium problems.
Practice this interview before the real one
The AI mock interview builds questions from your resume and the job description, reads them aloud and scores each spoken answer out of 10. Included on the free plan.
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