Approved.

now on dart
Translation Dart

This was harder than i first tought it would be. xD

You get more votes for best practice and it is harder to read so built in obfuscation to thwart the competition.

Does that edge case (n=1, k=10) still exist? Right now, the description says (0 ≤ k ≤ n^2).

good one!!

Nice, but if you pass an empty string to the function that will make an error, so write if condition for the pop_back

approved

Brute-force solution, runs in O(n^2). Don't do this please, use a hash map instead which runs in O(n). Please, this is important for everyone.

non riesco a capire come e possibile che con 18 persone al bordo alla fermata scendono 27
?????????

OP solved it, closing