bruh

Maybe he just mean, function wont return nil in case of empty string?

Next time please provide explanation for beginners

case 10,9: return 'A'

wave = []string{} ??? best practice?
allocations will still happen!

if you want to avoid this, set the capacity
wave = make([]string, 0 , len(words))

sort.SliceStable -> O(n*log n)

Please use spoiler flag next time.

range numbers[1:]

range numbers[1:]

range numbers[1:]

range numbers[1:] )))

var n, max int - better choice

sort.Ints - O(n * log n). It's not best practice. There maybe 0(n)

O(n^2)