Rooms Within Rooms

The castle has rooms inside rooms — your position is the whole chain of doors you walked through. 🏰

You start in castle. You get commands — enter:kitchen or exit (never exiting the castle itself). Print your final position as the chain joined by /, like castle/hall/library.

Example:

Input: commands = ["enter:hall", "enter:library", "exit", "enter:tower"] Output: castle/hall/tower

Entering hall then library builds castle/hall/library. exit pops library off. Then entering tower builds castle/hall/tower.