yes thank you I had a knowledge gap there I didn't know that you could do that.

Please don't post solution in discourse. Do read the community's Code of Conduct for more info

the changes from indexing won't work as its a parameter

Why do you say that?

I spent too much time like for 6 kyu task(

I gave up and look at the others'solution .

Surprise : the second one is very similar to mine

Strange !

Forked & Approved.

I am confused if we dont have to return the list and if I try assigning the list in the function body it will become a local variable and if I try accessing the global statement that also leads to an error and the changes from indexing won't work as its a parameter so How the reversed list is to be given as in not print or return no global variable to change it in so what is to be done I am confused?:(???

Simple task, simple solution.

OP solved it, closing

Debugging depending on 'switch' concept. o~O

Please don't post solution in discourse. Do read the community's Code of Conduct for more info

Multithreading will not help when you use inefficient algorithm, because multithreading can make your code only two- or four- or eight- times faster or so, and this will not help if your algorithm is 1000 times too slow for large arrays.

You most probably need to think of a better idea. But it's difficult to give any specific hints without knowing what is your current approach.