Thank you for the feedback. Glad you enjoyed the solution and got something out of it.

I always have mixed reactions when looking at other solutions as they're usually the 'make-it-1-line' solutions which wouldn't ever be used in a corporate environment. However, I thoroughly enjoyed seeing your solution as it makes so much sense (Annoyed I didn't think like this) and is easy to read.

As long as a solution is written in accordance with the kata requirements and not written to bypass anti-cheats, then it is a valid one.

wow, if i think that i'm doing that with a lot of rows i feel bad, but now i know Set's power

Это O(n) а можно O(1)

I was thinking the same thing, I had never thought of using this syntax in functions arguments, useful

This is pretty clever, my solution was nothing like this.

Сначала расстроился что мой код длинее, потом обрадовался что в два раза быстрее

i can't believe i wasn't able to find this solution...

kudos to you

больше похоже на n^2

Short, but when intervals are very big, this solution will get into trouble...

прямая зависимость, кмон

ну а если там цифры в млн будут. это ж сколько перебрать надо

Nice! Learned a new neat trick.

do you solve it? i cant understand how we can solve this with this explanation