Yandex.Contest supports two methods of entry: using your Yandex.Passport account, or using a username and password received from contest organizers.
This type of authentication is used if you want to participate in a contest or train on the Yandex.Contest site.
If you already have a Yandex account or any social media account, then, on the platform home page, click Login in the top right corner, choose your method of authorization, and enter your username and password.
If you do not have an account, then you have to register.
Special login pages can be created for large contests and secret contests. If you are participating in such a contest, then the organizers will give you the page address and authorization data for the platform.
Go to contest page, click Log in in the top right corner and enter the username and password received from the organizers.