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

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

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.

It is 50 eur according to current pricing, but will be for free if you win.

Daily 429th day streak

Tbh, a bit bullshit question, it is not very hard, but building intuition is a bit annoying the night before the Monday.
However it is good thing to remember bitwise operations a bit

https://leetcode.com/problems/apply-operations-on-array-to-maximize-sum-of-squares/description/?envType=daily-question&envId=2026-10-12

#daily #hard #nopattern