//Iterative Version
public void InsertNode(int val)
{
AVLNode temp = root;
Stack <AVLNode> parentStack = new Stack <AVLNode>();
while (temp != null)
{
parentStack.Push(temp);
if (val < temp.data)
{
temp = temp.left;
}
else if (val > temp.data)
{
temp = temp.right;
}
else
{
return;
}
}
temp = new AVLNode(val);
if (parentStack.Count != 0)
{
AVLNode temp1 = parentStack.Pop();
if (val < temp1.data)
{
temp1.left = temp;
}
else
{
temp1.right = temp;
}
Update(temp1);
while (parentStack.Count != 0 && (temp1.bf != -2 && temp1.bf != 2))
{
temp1 = parentStack.Pop();
Update(temp1);
}
if (parentStack.Count != 0)
{
temp = parentStack.Pop();
if (temp.data > val)
{
temp.left = Balance(temp1);
}
else
{
temp.right = Balance(temp1);
}
}
else
{
root = Balance(temp1);
}
}
else
{
root = new AVLNode(val);
}
}
public AVLTree(int data)
{
root = new AVLNode(data);
}
private AVLNode LeftRightCase(AVLNode node)
{
node.left = LeftRotation(node.left);
return(RightRotation(node));
}
private AVLNode LeftLeftCase(AVLNode node)
{
return(RightRotation(node));
}
private AVLNode RightLeftCase(AVLNode node)
{
node.right = RightRotation(node.right);
return(LeftRotation(node));
}
private AVLNode RightRightCase(AVLNode node)
{
return(LeftRotation(node));
}
