Just registered? You need to do a few things.
- Register an account with Code Forces. We recommend (but do not require) making a throwaway account for this class, especially if you happen to have taken the course before. Note that your username and standings will be visible to everyone in the class.
- Join the class group: https://codeforces.com/group/D5cxcX2741/contests
- Tell us your username at this Google Form
- Set up Your GitHub Repository so you can see your grades.
- You might also want to read the Syllabus.