public class Point2D{

  public int x;
  public int y;

  Point2D(int a, int b){
    x = a;
    y = b;
  }

  public void setPts(int a, int b){
    x = a;
    y = b;
  }

  public int getX(){ return x; }
  public int getY(){ return y; }
}