Daily (240/373 streak until LC cap)

Today is good problem, not bullshit, I like when it has some sort of simulation and objects to play with.

https://leetcode.com/problems/walking-robot-simulation/description/?envType=daily-question&envId=2026-04-06

#daily #medium

So,
Guys, I am finishing the article.
Anything except:
1. Chat api pushing message updates directly to GW nodes (socket stateful nodes)
2. Chat api publishes message update to queue per user
3. Chat api publishes message update to queue per chat

These are typical what I have seen on the forums.
Shout if you have some different approach in your mind. It is okay that it might be not correct. Also can be the real solution and I will defeat with my arguments

Daily (241/373 streak until LC cap)

Interesting problem, a bit bullshit as there is no pattern to learn, but fun, with funny corner case xD

https://leetcode.com/problems/walking-robot-simulation-ii/description/?envType=daily-question&envId=2026-04-07

#daily #medium #nopattern

Daily (242/373 streak until LC cap)

Should be easy instead of mid, 2 mins to solve, just simulate what is written. The only thing that worries me the number "I" in the title. Probably tomorrow we gonna have fucking hell problem.

https://leetcode.com/problems/xor-after-range-multiplication-queries-i/description/?envType=daily-question&envId=2026-04-08

#daily #medium #nopattern

Daily (243/373 streak until LC cap)

Told you guys :) Don't do this nonsense, it is legit nonsense. I would rather spend time tomorrow and eventually finish fucking article.

https://leetcode.com/problems/xor-after-range-multiplication-queries-ii/description/?envType=daily-question&envId=2026-04-09

#daily #hard #nopattern

I mean, not my solution.
https://leetcode.com/problems/xor-after-range-multiplication-queries-ii/solutions/7090800/python-sqrt-decomposition-by-awice-luex/?envType=daily-question&envId=2026-04-09

Daily (244/373 streak until LC cap)

Easy one, actually good for some simple leetcode patterns. Recommended

https://leetcode.com/problems/minimum-distance-between-three-equal-elements-i/description/?envType=daily-question&envId=2026-04-10

#daily #easy #pattern

Back in the game. Also want to try again some group trainings for a couple of times to remind myself some youth moments

Wtf, maybe stop? What happens with market, every single day I am poorer and poorer. Wondering if it is related to my first oncall shifts

Daily (245/373 streak until LC cap)

The same problem as yesterday with stricter constraints. (Yesterday's optimized solution will work)

https://leetcode.com/problems/minimum-distance-between-three-equal-elements-ii/description/?envType=daily-question&envId=2026-04-11

#daily #medium #pattern

Champ’s dinner, 1:30 AM 😁😁😁
I need to fix my schedule, and food in general. At least there is pepper😆

Today is drop.
I promised myself in the morning that I'm not leaving office until I'm finished.
I'm finished. Going home and will deploy

28 pages of nerdish text about why everyone around is wrong😁😁😁😁

https://andreyka26.com/messenger-system-design-is-wrong

Eventually, after 1 month, I did it 😁

Please share your thoughts. It is just article that explains the problem but does not have a solution

#systemdesign

Daily (246/373 streak until LC cap)

Good problem to remind yourself DP. Not hard tbh (at least topdown)

https://leetcode.com/problems/minimum-distance-to-type-a-word-using-two-fingers/description/?envType=daily-question&envId=2026-04-12

#daily #hard #pattern

Daily (247/373 streak until LC cap)

For tomorrow. Easy problem for 1 min, go and collect the coin

https://leetcode.com/problems/minimum-distance-to-the-target-element/description/?envType=daily-question&envId=2026-04-13

#daily #easy #nopattern

Daily (248/373 streak until LC cap)

Interesting problem, but pretty hard to come up with DP recursion here, wasn't intuitive for me.

https://leetcode.com/problems/minimum-total-distance-traveled/description/?envType=daily-question&envId=2026-04-15

#daily #hard #pattern

Daily (249/373 streak until LC cap)

Nice and easy problem, no specific pattern, 2 mins coding.

https://leetcode.com/problems/shortest-distance-to-target-string-in-a-circular-array/description/?envType=daily-question&envId=2026-04-15

#daily #easy

Daily (250/373 streak until LC cap)

Not bad and not that hard, but a bit puzzling with indices of indices xD

https://leetcode.com/problems/closest-equal-element-queries/description/?envType=daily-question&envId=2026-04-16

#daily #medium

Let's go😎