import java.lang.Comparable;

class Circle implements Comparable<Circle> {

	private int radius;

	public Circle(int r) {
		radius = r;
	}

	@Override
	public boolean equals(Object obj) {
		if(!(obj instanceof Circle)) {
			return false;
		}

		Circle c = (Circle) obj;

		return (c.radius == this.radius);
	}	

	public int compareTo(Circle c) {

		if (this.radius == c.radius) {
			return 0;
		}
		else if (this.radius < c.radius) {
			return -1;
		}
		else {
			return 1;
		}
	}

	@Override
	public String toString() {
		return "(" + radius + ")";
	}

}