Recently I tried many ways to get an OpenCup's login, but all failed. There seems to be only one way for me(even it's illegal), I'll pay 50$ for an opencup div1 login and another 50$ for a div2 login. I'll use it carefully(won't share it to others or participate in live contest by it), just for upsolving some problems.

If you know exactly what I mean and want to help you, please contact me with this email: skullskin#163.com.

This post might be illegal in codeforces too, I'm sorry for the bother.