You are in a room with one chair in the center of the room. The room is to small to lie down in or stand up in. The walls are covered in markings left by desperate men. You will have rats for company, and one window so that you can see the world that has passed you by.
You can't. Because You don't have any food. You would go insane before one month is up. The room wouldn't provide enough oxygen for you and the rats to survive.