public class Point {
	private int x;
	private int y;
 
	public Point() {
		this(0, 0);
	}
 
	public Point(int x, int y) {
		setPoint(x, y);
	}
 
	public void setPoint(int x, int y) {
		if (x>=0 && y>=0) {
			this.x = x;
			this.y = y;
		}
	}
 
	public int getX() { return x; }
	
 
	public int getY() { return y; }
	
	public double distance(Point p) {
		return Math.sqrt((x-p.x)*(x-p.x) + (y-p.y)*(y-p.y));
	}
}