public class Flat implements Home {
    private double area;
    private double balconyArea;
    private int floor;

    public Flat(double area, double balconyArea, int floor) {
        this.area = area;
        this.balconyArea = balconyArea;
        this.floor = floor;
    }

    @Override
    public String toString() {
        return "Квартира площадью " + (area + balconyArea) + " метров на " + floor + " этаже";
    }

    @Override
    public int compareTo(Home another) {
        if (another instanceof Flat) {
            Flat anotherFlat = (Flat) another;
            double anotherArea = anotherFlat.area + anotherFlat.balconyArea;
            if (area + balconyArea > anotherArea) {
                return 1;
            } else if (area + balconyArea < anotherArea) {
                return -1;
            } else {
                return 0;
            }
        }
        return 0;
    }
}