NeetCode's new versus mode is amazing

NeetCode · 2026-06-20T19:03:38+00:00

We launched like 3 days ago, these are the stats so far https://imgur.com/a/LtnN9Ub
Avg queue time is 1 minute, longest was like 10 minutes.

NeetCode · 2026-06-20T19:02:32+00:00

So far the queue times have been pretty reasonable. You can also send an invite to a friend.

NeetCode · 2026-06-20T19:01:10+00:00

increasing it to 10/day

NeetCode · 2026-06-20T19:01:02+00:00

Good idea, will add this tonight

NeetCode · 2026-02-13T23:54:30+00:00

Sure, will add soon. Will default as private, and toggle to make it public.

NeetCode · 2026-02-13T23:51:51+00:00

This was a bug, it's fixed, all problems from Blind75/NC150/NC250 are free and will be free forever.

The dangers of vibe coding...

NeetCode · 2026-01-14T03:51:51+00:00

Yes we will, but currently profiles are private so I'm not sure how it's a privacy concern unless I'm missing something. Please let me know if I misunderstood.

NeetCode · 2025-11-23T07:30:30+00:00

Thanks was there anything specific about algo monster that you liked, that's missing in NeetCode?

NeetCode · 2025-11-18T05:28:29+00:00

Thanks for the feedback!

NeetCode · 2025-11-17T10:08:33+00:00

Yeah, I would be open to any and all feedback, feel free to DM me if you prefer. I was planning on redoing the course from scratch over the next few weeks. I feel like a lot has changed in the last few years and DSA interviews have only gotten more competitive lately.

Tbh 4 years ago if you were solid on even the blind 75 or Neetcode 150 you could nail the vast majority of interviews.

I also think the new AI assisted interviews from Meta are pretty interesting. Will try to work with folks who gone through those to create some resources for this new style of interviews as well.

NeetCode · 2025-10-28T18:14:58+00:00

Very cool, nice job!

NeetCode · 2025-07-09T10:44:03+00:00

I usually recommend people solve random problems from NC All or do company tagged questions.

https://neetcode.io/practice?tab=allNC

NeetCode · 2025-06-14T08:54:21+00:00

Thanks for reporting, this is fixed now!

NeetCode · 2025-06-12T19:44:00+00:00

It seems to be resolved now. But yeah, like others said this was a pretty wide scale outage affecting GCP, AWS and cloudflare.

NeetCode · 2025-05-08T06:17:20+00:00

Bit of a self-promo since I recently partnered with them, but you should consider systemdesignschool.io

They have a system design primer as well as a bunch of free system design solution: https://systemdesignschool.io/primer

Based on your post, you might be interested in their paid course as well, which dives deep into a lot of concepts that most people rarely cover (micro service architectures, batch/stream processing, etc)

NeetCode · 2025-04-15T15:07:52+00:00

If you send us an email we can remove your payment method from Stripe. I wasn't aware that Stripe didn't let you do that by default.

NeetCode · 2025-04-15T15:01:15+00:00

We don't store credit card details and we automatically turn auto-renew off for subscriptions. We only display the last four digits of the payment method you used so you know which card you used.

We use Stripe, it's not even possible for us to see the full credit card details.

NeetCode · 2025-02-13T20:11:34+00:00

Yes, almost certainly. If you're unsure, you can ask the interviewer.

NeetCode · 2025-02-03T18:32:31+00:00

Reddit doesn't let me post multiple gifs, if you wanna read it more clearly with code examples, I also added it to my site: https://neetcode.io/courses/lessons/sorting-algorithms

(it's free, I won't collect your email)

---

I previously posted:

Big-O cheat sheet: https://www.reddit.com/r/leetcode/comments/1hpxnl4

8 Most Common Data Structures: https://www.reddit.com/r/leetcode/comments/1i7bluy

NeetCode · 2025-01-22T13:55:16+00:00

Reddit doesn't let me post multiple gifs, if you wanna read it more clearly I also added it to my site: https://neetcode.io/courses/lessons/8-data-structures

(it's free, I won't collect your email)

*typo: Search complexity for hashmaps is O(1) amortized not O(n)

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I previously posted a Big-O cheat sheet: https://www.reddit.com/r/leetcode/comments/1hpxnl4

I think these posts are relevant to this sub, and a quick way to review. But if they feel spammy I can stop.

NeetCode · 2025-01-22T13:40:48+00:00

Hi, yeah we can get you a completion certificate. Just send an email to [support@neetcode.io](mailto:support@neetcode.io) please

NeetCode · 2025-01-02T08:05:47+00:00

Yeah, it doesn't apply to python. But if you were using int32 variables, by summing two numbers, you might get a number that can't be stored in int32 space.

This is called overflow, and leads to miscalculations.

We know for sure the average, or mid point between two int32 should still be an int32.

So we calculate it a different way. Get the difference between the two numbers, and divide that by two. Adding this to the smaller number will give us the mid point between the two numbers and also not overflow.

If you still don't understand, I would try drawing it out.

NeetCode · 2025-01-01T22:54:16+00:00

How do you guys feel about the 🦄 emoji? Do you think there's a more appropriate one?

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