One of the applications for CIDR and 0.0.0.0/0 is cloud routing table configuration.

As shown on the screenshot:
- 10.0.0.0/16 we have private IPv4 address range that will be routed to locally (within VPC in case of AWS)
- 0.0.0.0/0 for everything else the request will use Internet Gateway Interface (and consequently, usually, will make it to outside internet).

#network

Now as you see the Longest Prefix Match usage in WHOLE INTERNET.
Here is good leetcode problem to remind yourself how it works: https://leetcode.com/problems/implement-trie-prefix-tree/description/

Daily 410th day streak

Amazing problem, has 2 patterns, classic, easy to understand one. I do recommend. And it is not really hard

https://leetcode.com/problems/minimum-operations-to-reduce-x-to-zero/description/?envType=daily-question&envId=2026-09-23

#daily #medium #pattern

Daily 411th day streak

Easy, 1 min coding, no pattern though.

https://leetcode.com/problems/smallest-index-with-digit-sum-equal-to-index/description/?envType=daily-question&envId=2026-09-24

#daily #easy #nopattern

Question: is it only me???

I either only work "just enough to have an update tomorrow", or I go into superman mode 12+ hours a day.

Besides that, I can't perceive work as 8 hours a day of handling a stream of tasks, equally motivated and at equal speed. To be productive, I need to see the chunk of work, work on it till the end, chill a bit, and then start a new one.

However, I know some folks at work who just do their job equally well from 9 to 18, and it seems like it doesn't matter much how and what they get assigned. And they usually stop PRECISELY at 18:00. I cannot do that. If I feel like I want to finish I would work till mental feeling of "okay it is done", then I can come later at work or whatever.

Maybe not all of you know, but I do not support idea of discipline 😆😆 at least the way I understand it.

It might seem I am very disciplined grinder: system design, 800 problems solved on Leetcode, 8 years doing gym so-so consistently, deep-dives into how something works on the fundamental level just to be better engineer.

It was ALL NOT because of discipline. But because of desire, excitement, passion to achieve stuff/title/status, passion to be the person I want to be, but I never really FORCED myself doing much, since I left school.

I truly believe, this way you live a much happier life. Maybe thats why I really value autonomy and my personal time so that I have buffer to rest when I dont want to do something, and push when I feel like it.

Some beta/gamma weak energy. Ahahaha, but yeah, I never claimed I am strong person😆

Let’s see whether this can sustain long term, for now it is 8 years being working well for me.

random Autumn evening in Dublin

On Sat - I am gonna have first sparring since 2023. So probably I will get “розбита єбасосіна кабіна» a bit. But let’s see.

This was my last time😁😁

It was that meme: “guys’ faces who only join sparring and never show up on regular training”, and they proved the point to me ahhahah

Daily 412th day streak

I was not able to solve in reasonable time. The problem is amazing otherwise (except very poor explanation/definition). Definitely recommend. I will work later today on more solutions and understanding of them.

https://leetcode.com/problems/brace-expansion-ii/description/?envType=daily-question&envId=2026-09-26

#daily #hard #pattern

Кабінєт на місці, guys

Daily 413th day streak

Pretty easy problem tbh. No specific pattern though, and sort of does not feel like bullshit, more or less applicable.

https://leetcode.com/problems/evaluate-the-bracket-pairs-of-a-string/description/?envType=daily-question&envId=2026-09-26

#daily #medium #nopattern

Daily 414th day streak

Amazing problem, has very simple pattern, seen this one many many times -> definitely recommended. The problem itself is pretty easy

https://leetcode.com/problems/reverse-substrings-between-each-pair-of-parentheses/description/?envType=daily-question&envId=2026-09-27

#daily #medium #pattern

So I got interesting thing about my body.

Probably all of you are getting 1-2 times sick (cold) per year (at least this is how it was for me).

I noticed few years, that if I have some important events in life (like meeting somebody, interview, oncall, etc) - I subconsciously tell my body: "we cannot get sick now, later". AND IT WORKS!!! (most of the time).

Then once important event is done, and I'm relaxed, same command: "now we can have sickness for a bit" and then it gets worse as usually sickness should go.

Do you have the same?

Well well well

Who you wanted to be in childhood?

Software engineering - was definitely not even top5 in my list 😆

(Не кєнт, а мєнт, виходить)