Create New Account

Register here for a personalized username for the USACO contest system. Your password will be sent to you immediately via email (check your spam folder if you do not see it right away). You can change your password later by editing your account details. All are welcome to participate in USACO contests and training, including students and non-students, USA and non-USA residents.

Note: Please enter your real name, since this is how you will be identified in our contest results. Fake or unacceptable personal names will not receive contest results and may be deleted at any time without warning!

(like John or Jane)
(like Smith)
(set to 9999 if you are past high school / secondary school)
(like USA or CHN; a list is available here)