public class Apartment {
    private int rooms;
    private int squareMeters;
    private int pricePerSquareMeters;

    public Apartment(int rooms, int squareMeters, int pricePerSquareMeters) {
      this.rooms = rooms;
      this.squareMeters = squareMeters;
      this.pricePerSquareMeters = pricePerSquareMeters;
    }

    public boolean larger(Apartment otherApartment) { //87.1
      if (this.rooms > otherApartment.rooms) {
        return true;
      }
      return false;
    }

    public int priceDifference(Apartment otherApartment) { //87.2
      int thisPrice = this.squareMeters * this.pricePerSquareMeters;
      int thatPrice = otherApartment.squareMeters * otherApartment.pricePerSquareMeters;

      if (thisPrice>thatPrice) {
        return thisPrice-thatPrice;
      } else {
        return thatPrice-thisPrice;
      }
    }

    public boolean moreExpensiveThan(Apartment otherApartment)  { //87.3
    int thisPrice = this.squareMeters * this.pricePerSquareMeters;
      int thatPrice = otherApartment.squareMeters * otherApartment.pricePerSquareMeters;

      if (thisPrice>thatPrice) {
        return true;
      }
      return false;
    }

}