sclass Size implements Comparable<Size> {
  int x, y;
  
  *() {}
  *(Point p) {
    x = p.x;
    y = p.y;
  }
  *(int *x, int *y) {}
  
  Point getPoint() {
    ret new Point(x, y);
  }
  
  public bool equals(O o) {
    ret o instanceof Size && x == o/Size.x && y == o/Size.y;
  }
  
  public int hashCode() {
    ret boostHashCombine(x, y);
  }
  
  // compare in scan order
  public int compareTo(Size p) {
    if (y != p.y) ret cmp(y, p.y);
    ret cmp(x, p.x);
  }
  
  public S toString() {
    ret x + ", " + y;
  }