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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Rather hard for someone who dont know funite automaton or regular expression. I have to learn a lot about it through solving the problem. The process was difficult but it was interesting finally. Enjoy it!
u may cal the all arrangements, but some arrangements are written the same.
in the case(1100 , &^|), the arrangemnt &|^ and |&^ are written the same as(( 1 & 1 ) ^ ( 0 | 0 )).
this may result in extra cnts.