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.

Lets bet: I truly believe if humanity overcomes ethics - this is AGI potential in the next 10 years. I knew about it earlier, but now even Prime is talking about it

https://youtu.be/Wq4nYKiQqcQ?is=M4BshefXRByKXfqB

asked gpt to generate thumbnail for article.... who is this gigachad Andrii?

Promised - delivered

https://live.andreyka26.com/i-got-an-offer-at-google-and-snowflake-in-2025

#bigtech

Daily (215/373 streak until LC cap)

Not bad problem, but pretty hard (for me), but it is graph related problem therefore - I like it

https://leetcode.com/problems/maximize-spanning-tree-stability-with-upgrades/?envType=daily-question&envId=2026-03-13

#daily #hard #pattern

Daily (216/373 streak until LC cap)

I'm not sure about this problem. It requires a bit of math, but overall, not bad

https://leetcode.com/problems/minimum-number-of-seconds-to-make-mountain-height-zero/?envType=daily-question&envId=2026-03-13

#daily #medium #nopattern

Daily (217/373 streak until LC cap)

Good medium problem, I liked it, not very hard

https://leetcode.com/problems/the-k-th-lexicographical-string-of-all-happy-strings-of-length-n/description/?envType=daily-question&envId=2026-03-14

#daily #medium #pattern

This one is not forgotten, today I am coming back to Dublin and will start working on the article. Since it got like record (53!!!) I will also add a bit of visuals for system design (God blesses AI agents).

Your opinion and feedback is really valuable.

Daily (218/373 streak until LC cap)

Bullshit a bit in a sense that 99.999% this will never be needed in real interview, as it is math and specific theorem needed.

Sorry, I'm after Kinedryl, so I'm still flying high after the flight to Dublin, I can't really grasp the math. My advice - skip this nonsense for now.

https://leetcode.com/problems/fancy-sequence/description/?envType=daily-question&envId=2026-03-15

#daily #hard #nopattern

Daily (219/373 streak until LC cap)

People generally don't like this q, but keep in mind it can be solved as bruteforce

https://leetcode.com/problems/get-biggest-three-rhombus-sums-in-a-grid/description/?envType=daily-question&envId=2026-03-16

#daily #medium

Daily (220/373 streak until LC cap)

Basically no pattern here, just some unique trick (some people suggest you need to do 2 hards to understand the intuition, but I wouldn't agree with that fully). Added simple visual for building the intuition and solution explanation

https://leetcode.com/problems/largest-submatrix-with-rearrangements/description/?envType=daily-question&envId=2026-03-17

#daily #medium #nopattern

https://www.linkedin.com/posts/jamesgosling_in-wake-of-outage-amazon-calls-upon-senior-activity-7439624073569202176-jL4P/?utm_source=share&utm_medium=member_ios&rcm=ACoAACNA3YkBiddSU4CK9T1xhbizRWv80xoSZ8A

Trully believe this is the trend, and hope it will stay the same so they don't fucking fire everybody