The DMOJ now has a Facebook page! Like us to stay informed on upcoming contests and events.

After a day of hardcore programming, we are proud to announce that you may now log in through Google, Facebook, and GitHub. You will be logged into the same account provided that you used the same email on the login service and this site. If not, a new account will be automatically created and activated.

What this means for new users is that they no longer have to register. If you are a new user, you may now simply log in through one of the supported services, and an account will be created for you.

This addition should integrate seamlessly with the current login system.

If you've been with the DMOJ for a long time, you may have multiple accounts associated with the same email (multiple accounts for the same email are disallowed now) — in that case, you will not be able to log in with your social accounts, since it is impossible to determine which account you're attempting to log into. If this applies to you, you need only change your account emails to be distinct.

Blog posts and contests may now be shared via Facebook and X — let your friends know what you're participating in!