// duynotes blog
public class Program {
  public static void main(String args[]) {
    Housing building = new Housing("123 Street");
    Housing floor1 = new Housing("123 Street - First Floor");
    int firstFloor = building.addStructure(floor1);
    Room washroom1m = new Room("1F Men's Washroom");
    Room washroom1w = new Room("1F Women's Washroom");
    Room common1 = new Room("1F Common Area");
    int firstMens = floor1.addStructure(washroom1m);
    int firstWomans = floor1.addStructure(washroom1w);
    int firstCommon = floor1.addStructure(common1);
    building.enter(); // Enter the building
    Housing currentfloor = building.getStructure(firstFloor);
    currentFloor.enter(); // Walk into the first floor 
    Room currentRoom = currentFloor.getStructure(firstMens);
    currentRoom.enter(); // Walk into the men's room
    currentRoom = currentFloor.getStructure(firstCommon);
    currentRoom.enter(); // Walk into the common area
  }
}