Would you like to register? Registering allows you access to the following:
These problems have solutions that you can access online and view immediately. Use these as practice for the challenge problems.
Throughout the year, we'll periodically post sets of challenge problems. As a registered user, you can submit a solution for grading. Once the solution is graded, you can view it online, as well as the grade that you received. You can visit your "My Page" to view your total score and see how you rank among other users.