Daily 422nd day streak

Not bad one and not very hard one. No pattern afaiu.

https://leetcode.com/problems/score-of-parentheses/solutions/141777/cjavapython-o1-space-by-lee215-uxpm/?envType=daily-question&envId=2026-10-05

#daily #medium #nopattern

Daily 423d day streak

Pretty easy. I don't know somehow I like parentheses questions xD.
This one does not really have any pattern.

https://leetcode.com/problems/minimum-add-to-make-parentheses-valid/description/?envType=daily-question&envId=2026-10-06

#daily #medium #nopattern

aaaaaand here we go.
Please so sorry for the sound. Was the first interview done by Artur 😁

For those who does not know Artur -> we started working as software engineers back in 2018 in Ukraine. From that time we were friends and now he decided to do interviews of Ukrainian people who got to big tech.


https://www.youtube.com/watch?v=ACugwyQdh34

This post is the post for giveaway, just in case. Comments should be left here. But this is in case you want to ofc

What is the giveaway about?

1 hour session of any kind with me: Leetcode/System design mock interview, typical outsource company interview, just talk about life, play Starcraft/Warcraft, whatever.

===

I have to remind you, that you SHOULD BE subscribed to both our channels, and leave comments to BOTH of the posts

@adevblogi
@programming_space

Otherwise, if random picks you, and you are not subbed -> we run it again and chose other person.

===

The link to Artur's post you should leave any comment in:
https://t.me/adevblogi/335

The link to my post you should leave any comment in:
https://t.me/programming_space/2345

A bit of Mr. Orange

Daily 424th day streak

Good one, not really that hard, check constraints and you'll understand.
Has pattern, so I do recommend.

https://leetcode.com/problems/remove-invalid-parentheses/description/?envType=daily-question&envId=2026-10-07

#daily #hard #pattern

Daily 425th day streak

Nice problem, requires a bit of intuition, still not hard, not really a pattern, but can be used for pattern as well

I do recommend.

https://leetcode.com/problems/remove-outermost-parentheses/description/?envType=daily-question&envId=2026-10-08

#daily #easy #pattern

Daily 426th day streak

Interesting problem, for some reason I got the wrong intuition 2 times before I got to pretty straight forward one.

A bit annoying edge cases. No patterns (except potential use of stack)

https://leetcode.com/problems/minimum-insertions-to-balance-a-parentheses-string/description/?envType=daily-question&envId=2026-10-09

#daily #medium #nopattern

Folks, with some transition of industry - I have to draw a cutline for Leetcode.

Now I have 839 solved problems. I have seen many initiatives across different big tech companies to push for “AI coding interviews” instead of classic Leetcode.

Besides that, I don’t think I learn much from daily, and honestly I don’t think I want to learn more than needed for interview atm.

So, the cutline is 1k solved problems. We need 150 more, which is quite a lot honestly, but this is the goal we go to.

Today is the day😎

Alive.
Now packing and daily leetcode💪

Daily 427th day streak

Not bad problem, has bunch of patterns, so I would recommend, however a bunch of edge cases, requires building an intuition, can be a bit annoying.

https://leetcode.com/problems/minimum-sum-of-squared-difference/description/?envType=daily-question&envId=2026-10-10

#daily #medium #pattern

Daily 428th day streak

Bullshit problem, but easy/fast to solve, just follow the description

https://leetcode.com/problems/sum-of-squares-of-special-elements/description/?envType=daily-question&envId=2026-10-11

#daily #easy #nopattern

The answer is YES.
The unique "key" of the connected socket is called 5-tuple:
source_ip; source_port; destination_ip; destination_port; protocol

Under the hood, kernel stores TCP sockets and UDP sockets in different tables -> that's why they can live together, and kernel will dispatch them based on protocol on the packet

#network #kernel