Dr. Wu has organized a programming contest and invited teams to participate. As It is a long contest and a good number of teams will join, Wu has set up a big building that will be used for the contest venue. The contest venue has some rooms in it. The rooms are connected with some one directional pathway. Wu always loves to try something new, and this contest was no different.
This is a companion discussion topic for the original entry at https://toph.co/p/contest-area