Funny and clear kata, thanks a lot.

I completely forgot about the eof newline and wasted tons of time trying to optimize the right answer :(

Deleted the newline and instantly passed LOL

Very interesting kata...

Hi
This kata permits me to understand the huge differences in performance among the different types of data structures
The main part of the code (calculation of the values in the cells) has quite no effect in the perfs

I couldnt get this less than 76 char

Removed in this fork

Nice series...

Python:

• O(n^2) solutions pass the tests

I agree that this feels much harder than 6kyu, very fun, but requires quite a bit of trickery both performance and golf wise

the latest code from the OP passes the tests, so the question is no longer answerable

Fixed

Bro, pretty sneaky Kata. Well created & well done! Thx

Python

• describe should always be preceded by a it block ... (also why print where you can place that message in the it block itself ? ^^)

Approved

Python translation kumited -- please check and approve.

Note: author seems inactive...