Daily (169 day streak)

Nice problem, easy one, good one to remind Sliding Window.

https://leetcode.com/problems/minimum-difference-between-highest-and-lowest-of-k-scores/description/?envType=daily-question&envId=2026-01-25

#daily #easy

some motherfucker, broke it😢

There is time during the year, when I'm getting Vlad Ten's vibe, where I need to do something, produce content, work etc, BUT, I have really huge urge to understand how something works.

I always was a guy who cares only about practical stuff. Then usually I'm starting go deeper with theoretical part and cover all the gaps. This is just how I work.

Last 3 days it was electricity. Cause I have no idea why, I didn't understand how it works, and with that I cannot go deep to learn CPUs.

I will be posting some extremely magical stuff for me, cause yeah, in terms of physics knowledge I'm dumb as stump xD

SO. I was wandering, how our cities are getting the electricity, literally what should happen for me to have lights in my office, under the hood.

Did you fucking know that all electric stations do is just spinning magnets around wires (or vice versa)? That's it.

Turned out that magnet just disturb electrons in wire which is enough to do current. By the way, magnet stays magnet forever, so it is some sort of "inifinite" thing, except you need some work to spin them around.

Ofc in reality it is a bit more complicated, but the general principle is just wiggle magnet, near the wires.

https://www.youtube.com/watch?v=tb3iN4m9Bik

Don't worry, this shit is temporary, once I will encounter the place where science "does not know" how some shit works I will cool down and we gonna again proceed with our system design, Snowflake, relocation, etc :D

I just want a bit of statistics around people who are interested/are in software engineering:

Daily (170 day streak)

Happy Monday, today is easy one - go and collect the coin


https://leetcode.com/problems/minimum-absolute-difference/description/?envType=daily-question&envId=Invalid%20Date

#daily #easy

Daily (171 day streak)

Amazing problem. You know I love graph problems and this is exactly graph problem. Not very hard.

https://leetcode.com/problems/minimum-cost-path-with-edge-reversals/description/?envType=daily-question&envId=2026-01-27

#daily #medium

Daily (172 day streak)

Hard shit. Just skip it, don't waste time. But if you want I will provide an explanation below

https://leetcode.com/problems/minimum-cost-path-with-teleportations/description/?envType=daily-question&envId=2026-01-28

#daily #hard

Oo people, today is amazing leetcode dailt. Go for it

Daily (173 day streak)

Amazing problem, for graphs, and I learned new algorithm today.

https://leetcode.com/problems/minimum-cost-to-convert-string-i/description/?envType=daily-question&envId=2026-01-29

#daily #medium

Daily (174 day streak)

Today daily is 💀💀💀. Probably the hardest I have ever seen and has the most mixing concepts/patterns.

The official solution in Editorial is 100+ lines, wtf. Skip it, don't do it.

#daily #hard

Next days I will drop my old articles (published in habr) about interview at Microsoft (offer), and Aws (reject) in 2021

I was crazy and stupid enough to reveal the questions they were asking, and answers 😅 MS folks saw that and then my manager in Microsoft told me to remove answers from article at least. I don’t do that anymore, but it was funny.

I mean they didnt sign NDA back then.

Daily (175 day streak)

Feels amazing, especially after yesterday's crazy trie+dijkstra+dp problem, slight recall for binary search, but can be solved directly as well.

https://leetcode.com/problems/find-smallest-letter-greater-than-target/description/?envType=daily-question&envId=2026-01-31

#daily #easy