//
// CORRECT, BUT NOT MODULAR, BAD DESIGN
//

class A { 
    public int a;
    public A(int i) { a = i;}
    public boolean equals(Object o) {
	if (o instanceof B) return false;
	return ((o instanceof A) && (a == ((A) o).a));
    }
}

class B extends A { 
    public int b;
    public B(int i, int j) {super(i); b = j;}
    public boolean equals(Object o) {
	if (o instanceof C) return false;
	return ((o instanceof B) && 
                (b == ((B) o).b) &&
                (a == ((B) o).a));
    }
}

class C extends B { 
    public int c;
    public C(int i, int j, int k) {super(i,j); c = k;}
    public boolean equals(Object o) {
	return ((o instanceof C) && 
                (c == ((C) o).c) &&
                (b == ((C) o).b) &&
                (a == ((C) o).a));
    }
}

public class EqualsTest2 {
    public static void main(String[] args) {
	A a1 = new A(1);
	B b1 = new B(1,1);
	C c1 = new C(1,1,1);
	
	System.out.println("a1.equals(b1) = " + a1.equals(b1));
	System.out.println("a1.equals(c1) = " + a1.equals(c1));
	System.out.println("b1.equals(a1) = " + b1.equals(a1));
	System.out.println("b1.equals(c1) = " + b1.equals(c1));
	System.out.println("c1.equals(a1) = " + c1.equals(a1));
	System.out.println("c1.equals(b1) = " + c1.equals(b1));

	System.out.println("a1.equals(a1) = " + a1.equals(a1));
	System.out.println("b1.equals(b1) = " + b1.equals(b1));
	System.out.println("c1.equals(c1) = " + c1.equals(c1));
    }
}