Who has the right to use the top floor?

For the area of the roof, according to the regulations, it belongs to the public area of the whole building, not a single family. Everyone in this building has the right to use it, regardless of size. Moreover, there will be no public * * * area on the roof. All buildings with a height of less than 2m are not considered as property area, not to mention the empty roof above. But now the roof is usually used on the top floor, and downstairs will not come up to see the starry sky. If you don't repair the house, the best way to possess it is to plant flowers and plants %7E%7E first, and others can't do anything about it. You are not going to build a house to live in.