How to write the input function?

#1

The input given is level order traversal, how to take that as input from the user?

#2

do it like this
Tree build Template

if you have any further doubt in this template feel free to ask

#3

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.