Where can I see the works of the winners in Topcoder?

Question

Programming

It's about https://www.topcoder.com
Sometimes you see interesting problems in the archives, but it's not clear where to look how they were solved. Everywhere is locked and locked. Do I need to pay or what?

Answer 1

I added gmail to the username of the winner and guessed it - it turned out to be the author. It's just that Google didn't say anything about username.

Answer 2

I don't know about topcoder, but in codewars, for example, other people's solutions are closed until you solve the problem yourself.