Daily (207/373 streak until LC cap)

Easy problem, happy Wednesday.

https://leetcode.com/problems/special-positions-in-a-binary-matrix/description/?envType=daily-question&envId=2026-03-04

#daily #easy

Just count number of zeros per row and per column and then count special positions

Daily (208/373 streak until LC cap)

Not bad problem

https://leetcode.com/problems/minimum-changes-to-make-alternating-binary-string/description/?envType=daily-question&envId=2026-03-05

#daily #easy

At least here AI cant replace me

I am sooooo tired of AI.

Whole my day I am reading AI slop when I don’t understand something to segregate it to some mental model piece by piece. Then I am reviewing ai code

Evening when I need to relax, half of the instagram reels are ai, linkedin 99% ai.

I want to have “report” -> “ai generated” button. This is the time for that.

Ihor, you were right…

Daily (209/373 streak until LC cap)

Easy problem with tricky edge cases) (therefore 40% acceptance)

https://leetcode.com/problems/check-if-binary-string-has-at-most-one-segment-of-ones/description/?envType=daily-question&envId=2026-03-06

#daily #easy

Daily (210/373 streak until LC cap)

Took me a while to be honest, as bruteforce n^2 won't work here. Not bad problem, but does not do any proper leetcode pattern. (I added visualization to solution)

https://leetcode.com/problems/minimum-number-of-flips-to-make-the-binary-string-alternating/description/?envType=daily-question&envId=2026-03-07

#daily #medium #nopattern

Next days I will be commuting to Prague for one week, and promise to finish the article about Google/Snowflake offers, interviews etc. Nowadays I'm extremely busy with Snowflake, have a lot of stuff to do and to learn. Due to having a lot of staff+ ex-Google as teammembers, people have pretty high expectation of what you should be capable to do first few months.

So now I feel a bit like put into dark maze without light, I smell shit everywhere around me, and I need to find the exit. This is literally my task😁 So, I'm spending 8-10 hours a day in Snow maze and don't have time to finish(

Highly recommended. Especially in era of AI

https://youtu.be/ARxtLv7kgEk

Daily (211/373 streak until LC cap)

Not that hard tbh.

https://leetcode.com/problems/find-unique-binary-string/description/?envType=daily-question&envId=2026-03-08

#daily #medium

Friendship established

Daily (212/373 streak until LC cap)

Total bullshit, don't waste your time.

https://leetcode.com/problems/find-all-possible-stable-binary-arrays-i/description/?envType=daily-question&envId=2026-03-09

#daily #medium #nopattern

Oookay, now I hit System Design problem I am not able to solve(partially).

Problem: Design Messenger, but not pussy Whatsapp with 250 user/chat, but rather gigachad Telegram scale with 200k user/chat.

I already consulted with 3 principals, 2 of them from big tech, one is ex-Google + 1 guy who worked at Telegram/Vk. They all concluded the same: all existing solutions the internet for Messenger are not linearly scalable for large chat real time updates. And they don’t really know how Telegram does it (nor do I).

I guess it is time to create article, that reviews the existing solutions, and leaves some space for hypothesis.
Maybe at some point I’ll find a tuy who worked on realtime updates in telegram or get to the interview process there, but for now, I really don’t have idea how Telegram does it.

Thumb up/down for this,we can still skip messenger and continue with others, or I can do messenger in regular style, with scalable solution (but this solution is not the way the telegram works)

Amazing.

Btw, dont waste ur time on Leetcode daily. It is Bullshit q.

Omg, 35 likes, will do within the next 1-2 weeks, and with simple POC. I think this is good traction.

First finish interviews article that I promise for a long time, and then switching to Messenger.

Daily (213/373 streak until LC cap) (for yesterday)

Even bigger bullshit that I advised to not solve.

https://leetcode.com/problems/find-all-possible-stable-binary-arrays-ii/?envType=daily-question&envId=2026-03-11

#daily #hard

Daily (214/373 streak until LC cap)

Easy problem for bitwise operations. Go and collect your coins

https://leetcode.com/problems/complement-of-base-10-integer/submissions/1944999786/?envType=daily-question&envId=2026-03-11

#daily #easy

For people who straight away are taking phone when building the project, or waiting for agent to finish the prompt task

https://www.ycombinator.com/companies/clad-labs

This is sooo zoomer zoomer thing😁 I caught myself going to threads while waiting for cursor, but I forcefully make myself to not do that.