Without the concept of floor plan, it is not easy to distinguish at least 15 square meters with bathroom. You have three floors, each floor has more than 100 corridors, and there are 70 stairs, usually four, and the third floor has 1 1 (the bottom floor lacks a hall).

A room should be decorated at least 1.5W yuan (with bathroom), and now labor is expensive. Furniture and home appliances are in a room of 2W-2.5W (not including parts decoration for * * *). A * * * renovation costs about 30w. (Decoration quality and regional differences are quite large, and it should be above 18W as long as it is suitable for people. )