OJ Board

I submitted the code which got AC in the previous system.
But I got wrong answer this time!!
How come it would happen?

Is the problem has been rejudged?

different compiler could make your program get WA. Be sure it's standard enough to get AC in every compiler!

I've fixed a nasty bug that may have caused problems with some inputs. Please resubmit. If you are still getting WA it may be a compiler issue after all.