just tested 'wqqq' case. indeed it fails.

You are not first who noticed that) At the very bottom of commets you'll see almost the same statement from seven years ago. Nothing's changed since then:) Personally I did't test this solution.

No, It will fail in some cases like s = 'wqqq'.

But I think you're not seeing the forest for the trees here. The approach itself is incorrect (try inputs like aaab provided by other commenters); I think that's the main issue first and foremost

purest gold

I've just about done something similar, but my solution needs to be perfected

А зачем используешь оператор расширения в первом выполняющимся выражении ? Вроде и без этого массив "a" можно перебрать reduce'Ом. Why did you use a sprad operator in the first executive expretion? It would work without it, actually.Can you explain it to me?

That's excellant

dude... of course that's clever, but writing adequate parameters names no one called off

Naebka goev

Lord

You have a very weird opinion regarding someone's ego. I guess exactly you show off here

Undoubtedly, you're such a clever person

xD