To do that you have to register and wait for site administration to activate your account. Then you will get the single use link to manage your account.
While completing your profile, please, fill "Username" with your real Second name + First name, better in Russian. No nicknames! Otherwise we will never recognize you and your homeworks. Choose your group number.
Afterwards you can go ahead and upload your homework to the system. You can also find your rating. All features are accessible following "My tasks" link on the right.
To upload Homework - choose the corresponding task and press "Submit".