private static Node <T> RotateLeft(Node <T> n)
{
Node <T> result = n.Right;
n.Right = result.Left;
result.Left = n;
n.FixHeight();
result.FixHeight();
return(result);
}
public Node RightRotate()
{
Node q = Left;
Left = q.Right;
q.Right = this;
this.FixHeight();
q.FixHeight();
return(q);
}
public Node LeftRotate()
{
Node p = Right;
Right = p.Left;
p.Left = this;
this.FixHeight();
p.FixHeight();
return(p);
}
public static Node <T> Balance(Node <T> n)
{
n.FixHeight();
if (n.BalanceFactor() == -2)
{
if (n.Right.BalanceFactor() > 0)
{
n.Right = RotateRight(n.Right);
}
return(RotateLeft(n));
}
if (n.BalanceFactor() == 2)
{
if (n.Left.BalanceFactor() < 0)
{
n.Left = RotateLeft(n.Left);
}
return(RotateRight(n));
}
return(n);
}
private static Node DoBalance(Node node)
{
node.FixHeight();
if (node.BalanceFactor() == 2)
{
if (node.Right.BalanceFactor() < 0)
{
node.Right = node.Right.RightRotate();
}
return(node.LeftRotate());
}
if (node.BalanceFactor() == -2)
{
if (node.Left.BalanceFactor() > 0)
{
node.Left = node.Left.LeftRotate();
}
return(node.RightRotate());
}
return(node);
}
