import java.lang.Comparable;

class Ladder implements Comparable<Ladder>{
	private int length;

	public Ladder(int l) {
		length = l;
	}

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

	@Override
	public boolean equals(Object obj) {
		if(!(obj instanceof Ladder)) { return false; }
		Ladder l1 = (Ladder) obj;
		return this.length == l1.length;
	}
	
	@Override
	public int hashCode() {
		return length;
	}

	public int compareTo(Ladder lad) {
		return this.length - lad.length;
	}
}