Remind me the address of the Russian-language sports programming service?

Question

Distance learning

Somewhere on the Internet there is a service for completing assignments for the purpose of learning in different programming languages. The task is given in Russian, the programming language is chosen and you start solving.
But there is one feature: the task is solved at once by two people at the same time, whoever can solve it faster gets a plus in karma. And accordingly, the task is selected randomly from the database, but you need to wait until the second person connects and even then you can write code.
Can you tell me the address please, I can't remember?

Answer 1

www.codeabbey.com