Unable to understand the question

#1

Can you please tell me how to proceed.Unable to understand the sample test case.

#2

refer to this:


if this solves your doubt please mark it as resolved :slight_smile:
#3

mam can u again give me the link of the vedio which u had send earlier.

#4

here:
https://www.youtube.com/watch?v=CKDFPzX24BY