We have just launched a new feature called Open Challenges. Till now you could not solve challenges for fun/fame. You would need an invite from an employer/instructor to submit your solution.
We just removed that restriction. !!!
Now ever person gets a 'User Role', where he/she can solve challenges and submit solutions to sharpen their skills / for fun etc. We are trying to build a vibrant community of coders who like programming. It can also be used as a means to showcase your programming potential to anyone you may wish to share it with.
Everybody can partisapate in this community. You can switch to your 'User Role' by using the drop down you see when you log in:
Happy coding. Invite your friends !!!