Can you figure out which floor the control room is on?

The control panel is hidden behind a paintingon the highest floor that can satisfy the following conditions:Each room has exactly three doors to other rooms on that floor,except the control panel room,which connects to only one,there are no hallways,and you can ignore stairs.Unfortunately, you don't have a floor plan,and you'll only have enough time to search a single floor before the alarm system reactivates.Can you figure out which floor the control room is on?