You're trapped in a maze. There is a way out. Path junctions are all 3-way.
If you use the strategy of always taking the path going right, what will happen?
(Note: This problem is deliberarely vague.)
(In reply to
this is the real picture of the tree by qball)
I don't see a reason to assume that that is the topology of the maze. First of all, each junction in your description has four paths leading out of it, not three (mazes in general are not one-way). Furthermore, there's no reason to assume a tree topology at all. Mazes can have cycles, but trees can't.