Submiting java code

[kotoko]

Hi!

I'm trying to submit for the first time in the system. I'm confident my solution is correct since it already got accepted in a local contest.
I'm already using the recommended readLn function and have no public classes or methods (except main).

I get a Runtime error. What should I be hunting for? Different input? Can my solution be wrong? Any other formatting restrictions?

It's volume VIII problem 869 - Airline Comparison.

Thanks in advance

[MAK]

You don't need the recommended readLn method. Java uspport at this judge has been upgraded and it now fully supports jdk1.6. So, you can simply use Scanner and/or BufferedReader. Make sure that the class with the main method is named Main.