BOI - bins

Can someone please look at my code and tell me what's logically wrong with it, am I missing something. I added comments into the code:
http://www.z-trening.com/submit.php?submit=7100154750&subm_code=1

I get both TLE and WA. I would be very thankful if someone could tell me why.
Thanks :D

Can you explain me the idea for solving this task?