This is a great challenge to place buildings and pass levels
The number on the roof is the height of the building
Standing at an intersection, tall buildings will block low buildings
The number of road signs refers to the number of buildings that can be seen along the road direction from an intersection
Buildings with the same number cannot appear on the same road (in the same row or column)
The numbers in the same row and column are not the same, which is correct
Here is a selection, with the number next to it indicating the remaining selectable quantity
Click on the open space and select the selected building, which will be placed on the open space
Clicking on a placed building will return to the selection area
It is considered successful to pass the level until all buildings are correctly placed on the open ground