LeetCode 75 is LeetCode's own study plan: 75 problems, published and maintained on leetcode.com, grouped into topic sections that walk you through the data structures and techniques that show up again and again in coding interviews. Unlike the community lists floating around the internet, it lives inside the platform — the editor, test cases, editorials, discussion tab and progress tracking are all in one place.
That makes it the lowest-friction way to start structured practice. This guide covers what it actually contains, the order we recommend working it, how long it takes, how it differs from Blind 75, and the review routine that turns 75 solved problems into 75 problems you can still solve a month later.
What LeetCode 75 covers
The plan is organized into named topic sections rather than a flat list. The topics track the standard interview curriculum:
- Arrays and strings — the warm-up section: in-place manipulation, prefix products, string parsing and compression.
- Two pointers — converging pointers on sorted data, and the fast/slow variants.
- Sliding window — fixed and variable windows over arrays and strings.
- Prefix sum — running totals and the pivot-index family of problems.
- Hash map and set — frequency counting, membership tests, and difference-based lookups.
- Stack and queue — matching, monotonic behavior, and simulation with a deque.
- Linked list — reversal, deletion, and the two-pointer traversal tricks.
- Binary tree DFS and BFS — two separate sections, which is a good design decision: recursive traversal and level-order traversal really are different skills.
- Binary search tree — ordering invariants and search/insert/delete.
- Graphs (DFS and BFS) — grid traversal, connectivity and shortest-hop problems.
- Heap and priority queue — top-K and streaming-maximum problems.
- Binary search — on sorted arrays and on answer spaces.
- Backtracking — combinations, permutations and constrained search.
- Dynamic programming — one-dimensional first, then grid DP.
- Bit manipulation and a small trie section — short, but they cover the questions that otherwise blindside you.
- Intervals and monotonic stack — the closing sections, and the two most commonly skipped.
Section names and exact groupings can change as LeetCode maintains the plan, so treat the above as the shape of the curriculum rather than a fixed table of contents. What matters is that the coverage is broad and the sections are small — typically two to six problems each, which makes each one finishable in a sitting.
How it differs from Blind 75
| LeetCode 75 | Blind 75 | |
|---|---|---|
| Maintained by | LeetCode, on its own site | Community, from a Blind forum post |
| Structure | Official study plan with topic sections and tracking | A list; ordering varies by mirror |
| Difficulty ramp | Gentler; more easy problems early | Jumps into mediums quickly |
| Hard problems | Few | A handful, including well-known ones |
| Support material | LeetCode editorials and discussion | Whatever mirror or channel you use |
| Best for | Building fluency and momentum | Maximum pattern density per hour |
They are not competitors so much as two points on the same curve. LeetCode 75 gets you fluent; Blind 75 gets you dense. If you want the three-way breakdown including the larger list, read NeetCode 150 vs Blind 75 vs LeetCode 75.
A suggested order
The plan's default order is sensible, but if you are optimizing for interview readiness rather than completion, this sequence front-loads what gets asked most:
- Week 1 — foundations. Arrays and strings, two pointers, hash map and set, prefix sum. These are the highest-frequency techniques and they warm you back up fast.
- Week 2 — structures. Sliding window, stack and queue, linked list, binary search. Sliding window in particular repays being done as a single batch.
- Week 3 — trees and graphs. Binary tree DFS, binary tree BFS, BST, graphs, heap. This is the heart of the plan and where most interview questions actually live.
- Week 4 — the hard tail. Backtracking, dynamic programming, intervals, monotonic stack, bit manipulation, trie. Do not let time run out here — this is the section people skip and then get asked about.
Batch by section, not by day. Solving every sliding-window problem in one sitting teaches the pattern far faster than one per day across a week. The point of a topic-organized plan is to exploit exactly that.
Realistic time estimates
| Pace | Daily load | Finish time | What you get |
|---|---|---|---|
| Sprint | 7–8 problems | ~10 days | Recognition, shaky recall |
| Standard | 3–4 problems + re-solves | 3–4 weeks | Solid pattern recall |
| Sustainable | 2 problems + re-solves | 5–6 weeks | Durable, works alongside a job |
Budget roughly 25–30 minutes per new medium and 10–15 for a re-solve. If you are past 30 minutes and genuinely stuck, read the editorial, understand the idea, and put the problem back in the queue for tomorrow. Sitting in silence for two hours is not perseverance; it is the slowest possible way to learn one technique.
How to review so it sticks
- Re-solve, do not re-read. A problem counts as learned when you can write it from a blank editor a week later. Green checkmarks measure attendance, not skill.
- Keep a one-line pattern log. After each problem write a single sentence: the trigger in the prompt and the technique it maps to. “Longest substring with a constraint → variable sliding window with a counter.” Reviewing thirty of those lines is worth more than re-reading thirty solutions.
- Space the repeats. Day 1, day 3, day 10. Anything you fail on the re-solve goes back to the front of the queue.
- Say it out loud. Narrate the approach and the Big-O as you type. That is the actual skill under test, and it is how our 15 core LeetCode patterns guide frames every technique.
- Simulate the pressure. In your last week, do problems on a timer with someone watching or a screen recording running. Solving alone at midnight is a different activity from solving while explaining yourself.
Four mistakes that waste the plan
- Treating the checkmark as the goal. Finishing the plan is not the same as being able to solve the plan. If you never re-solve anything, you end up with 75 green boxes and no recall under pressure.
- Reading the editorial too early. The struggle before the answer is where the pattern gets encoded. Give yourself a real attempt first — even a wrong one that you can articulate afterwards.
- Skipping the last two sections. Intervals and monotonic stack sit at the end, which is exactly why people run out of time before reaching them. Both show up in interviews far more often than their position suggests. If your timeline is tight, move them earlier rather than dropping them.
- Solving silently. The interview asks you to think out loud while typing, which is a genuinely separate skill from solving. Practice it from day one or you will discover the gap on the call.
What to do after you finish
Do not immediately start another general list — the overlap is large and you will spend two weeks re-solving problems you already know. Better next steps:
- Go deeper on the hard end. The NeetCode 150 roadmap adds the extra reps in graphs, dynamic programming and binary search that a 75-problem plan can only sample.
- Go company-specific. Filter by the company you are interviewing with and work the recent-frequency list. Question styles differ more than people expect.
- Add the non-coding rounds. A strong coding round rarely carries a loop by itself; system design and behavioral prep deserve real calendar time too.
Practice the plan, then get live support
CoPilot Interview follows the question during real Zoom and Teams calls and surfaces the matching pattern with a working solution and Big-O in seconds, so your attention stays on explaining your reasoning.
Try it freeFAQ
What is LeetCode 75?
LeetCode 75 is LeetCode's own study plan on leetcode.com: 75 problems grouped into topic sections that walk you through the core data structures and techniques asked in coding interviews, with progress tracking built into the site.
Is LeetCode 75 the same as Blind 75?
No. Blind 75 is a community list that originated on the Blind forum and is mirrored across many sites, while LeetCode 75 is an official study plan maintained on LeetCode itself. They share many of the same classic problems, but the selections and the ordering are different and LeetCode 75 has a gentler difficulty ramp.
How long does LeetCode 75 take to finish?
At three to four problems a day with time reserved for re-solving earlier ones, most people finish in three to four weeks. Pushing to eight a day gets you through in under two weeks but usually produces recognition without recall.
Is LeetCode 75 enough for a FAANG interview?
It is a solid foundation but it is lighter on the hard end than lists aimed squarely at senior loops. Finish it, then add harder graph, dynamic programming and interval problems, plus company-tagged questions for wherever you are interviewing.
Should I do LeetCode 75 before NeetCode 150?
If you are newer to data structures, yes - the easier ramp builds momentum and most of what you learn transfers directly. If you are already comfortable with mediums, skip straight to a denser list rather than spending three weeks on problems you would solve on sight.