Algorithm 7 Get Parent of $x$ in Time Linear to $x$ ’s Number of Children

1:procedure Parent( $x$ )

2: $p = x.left$ - $child$

3:while not $p.right$ - $sibling$ - $to$ - $parent$ do

4: $p = p.right$ - $sibling$

5:end while

6:return $p.right$ - $sibling$

7:end procedure