Help understanding a question in the current cook-off

Hello everyone. This is a question of the ongoing January Cook-Off 2019. I do not need any hints for the answer, I just need some clarification for the question. I have asked the relevant doubts in the comments of the question, here's the link for the comments:

https://drive.google.com/open?id=1qVgsF8HF7llgqPYwxg4UvzZmucIU9--p

Here's the link for the question:

https://www.codechef.com/COOK102B/problems/ADAKNG

Can someone please explain with an example as to what I exactly need to do? Help appreciated, thanks a lot!