Code forces First submission

I was little late for the Div 2 contest today. This would have been my first div 2 contest. but i missed. Started practising. Came across 9C hexadecimal's number problem. It was a simple problem. It asked for counting the numbers within <= given number which are a vaild binay number. I arrived by taking the binary numbers from 1 and comparing representation in decimal with the given number. 

UVA 10954

This problem uva 10954 can be easily solved using Priority queues in java. This is the first time i wrote code using a priority queue. It automatically sorts the elements added.

Here is my code