Labyrinth idea

So in the movie, Sarah's given thirteen hours to get from the entrance of the Labyrinth to the castle in the Goblin City. Let's assume that in the world of the Labyrinth, there have been multiple people who are issued the same challenge with the same time limit. Does it have to be thirteen consecutive hours? Or would it be possible for somebody make a deal where it has to be solved in thirteen hours where they could be scattered about a longer amount of time and whenever they have to "work" on it, they're dropped into the spot where they left off last time?