OJ Board

Posted: **Thu Oct 23, 2014 9:14 pm**

I can't solve this. It's too unethical.

Posted: **Tue Jul 04, 2017 3:11 pm**

jichen1234 wrote: Thu Oct 23, 2014 9:14 pm I can't solve this. It's too unethical.

What do you mean?
I think it is a nice problem..

11615 - Family Tree