Random offline system design

Daily

Easy. Just 1 timesaver: better to use map instead of array

https://leetcode.com/problems/design-spreadsheet/description/?envType=daily-question&envId=2025-09-19

#daily

Daily

The actual problem is quite interesting and tests different datastructures.

Also fucking constraints are misleading (I will explain in the solution)

https://leetcode.com/problems/implement-router/description/?envType=daily-question&envId=2025-09-20

However I believe that the amount of code produced here matches rather hard problem.

#daily

well, agree, this week was good, without math shit

We are living in crazy time. If algorithm does not know you - you are not allowed to watch youtube

Daily

A bit messy with code, but it is not much harder than yesterday's mid.

However, there is interesting topic for which Datastructures to use here (check solution in comment)

https://leetcode.com/problems/design-movie-rental-system/description/?envType=daily-question&envId=2025-09-21

#daily

(((((((((

first I switched from c# to javascript, cause it is less messy, and realized, JS does not have minheap.

So I switched to python, that has heapq, and even less messy so that now I don't have sorted set with tasty O(log n)

Daily

Today is very easy, 2 mins, go and collect coin

https://leetcode.com/problems/count-elements-with-maximum-frequency/description/?envType=daily-question&envId=2025-09-22

#daily

For now, yes, thanks for opening my eyes, apologies, in leetcode there IS a priority queue. It is exposed by library https://datastructures-js.info/docs/priority-queue

This library is kind of preimported for your leetcode question.

How I was doing it before xDD

Actually in real interview you don't have to know this lib and use it. You can just say interviewer: yeah, I know there is a heap DS, it can be implemented using array, it has log(n) complexity bla bla bla, BUT, I will kind of assume this is the heap, and instead use array and sort it after every insert.

Am I broken? just put this stream for 3 hours, no comments only game sounds for nostalgia while working.

and it is so warm feeling, I want Lineage2 to be back, so I can spend somehow my vacation😁😁😁😁

This is gangsta shit guys
https://www.youtube.com/watch?v=C1pjPv3WJyo

They guy is just sitting on the couch, smoking, chilling and meanwhile writing fucking game engine for POV shooter. Idk, if there was vim used, that's it 1000% TOP G.

At some point we gonna have similar streams, but I just need to get some skills, and we gonna write distributed shit.

The goal is agreed, I'm collecting money for this:
https://www.youtube.com/watch?v=7FoXzSWV1hU

Daily

Haven't solved it yet, but seems not hard

https://leetcode.com/problems/compare-version-numbers/?envType=daily-question&envId=2025-09-23

#daily