Who gives this piece of a bad code "best practices"? He could also name every variable a/b/c/d/e/f....

I did the solution with over 40 lines of code and time complexity was still O(N log (n) ), so looking at this solution is embarrasing

tbh yeah TC is O(nLog(n)) and SC is O(n) when it can be done with nested loops with TC of O(n^2) and SC of O(1) but seems like less code

WHO DA HELL VOTES FOR THE BEST PRACTICES? It's soooooooo SLOW!

Who press the "Best Practices" button? This solution is slower than turtle....

raise it to a positive(?) exponent

I think it is a bit more complex than that.

Things are even better! By e^iπ = -1, you can have a positive number, raise it to a positive(?) exponent, and get a negative result! How cool is that!

Well, kinda. All it takes is some... imagination.

See solutions
Crying out of misery

Literally everyone of us, with some kata, at some point of time

After 2 hours of trying to figure it out myself
Giving up and came here to search help
I notice wikipedia article - Complex Numbers
Quickly reading contents trying to make sense of it all
I dig deeper into imaginary unit article
After hour I understand what's going on
After 30 minutes the code is ready
Runs without any problems and I submit
See solutions
Crying out of misery

Check this: https://en.wikipedia.org/wiki/Complex_number

Wait, I can't get it, how it is possible to take a number to the power of even number and get the result with minus?

Don't check every number for divisibility.

Thats a very nice mindset, brother! Congratulations!

Try to run your solution locally in your IDE for n=60 and see how it works fails with your debugger.