Number Theory Sessional

Have you seen the movie "Liar Liar"? In a scene Jim Carrey was hurting himself hard in a psychic manner. One man asked him "What are you doing?" Jim answered "Can't you see? I'm kicking my ass." And yesterday afternoon I did the same. It was Number Theory sessional and I screwed myself in a thorough rapture. The paper was quite easy (what I didn't expect), still I could not find any clue for solving it. No explanations, no excuses... I have kicked my ass yesterday for no reason. And it's a fact!