COJ Forum

I'd love the possibility of submitting solutions with Safari browser. At this moment, every time I paste my code and push Submit button I get the message "An internal error has ocurred" and no submission is done. I know that the system is not designed for this browser but I have to say that I've use...

I'm trying to use Datagen tool for problem 2519 and I get this message either in Model Solution or in Custom Solution: :4: error: class Postfix is public, should be declared in a file named Postfix.java public class Postfix { ^ Note: uses unchecked or unsafe operations. Note: Recompile with -Xlint:u...