Code Jam 2019 Qualification Question A didn't get approved. Need help to understand.

Question

I applied for 2019 Qualification Round Google Code Jam, but my first question didn't pass the judge. I don't know why, need help to understand what's wrong.
Problem description:

http://dontpad.com/CodeJam/A

My code:

https://code.sololearn.com/cbgn6Az7wvET/?ref=app