public class City{		public double x,y;	public int update,choose;		public City(double x,double y){		this.x = x;		this.y = y;						update = 0;		choose = 0;			}		public double dist(City c){		double dx = this.x - c.x;		double dy = this.y - c.y;				return Math.sqrt(dx*dx + dy*dy);			}	}