I have WA (test #5). Who can give me tests? I want to find and correct my mistake. Please, answer.

look here
http://acm.timus.ru/forum/thread.aspx?space=1&num=1021&id=10945&upd=632457056990312500

Lifanov is right! I had WA#5, but when I read Lifanov's topic, I wrote AC program! It's crazy, but he's right!