private NearestSmallerNode <TKey, TValue> Insert(TKey key, TValue value, NearestSmallerNode <TKey, TValue> node)
{
if (node == null)
{
return(new NearestSmallerNode <TKey, TValue>(key, value));
}
if (key.CompareTo(node.Key) < 0)
{
node.Left = Insert(key, value, node.Left);
if (node.GetBalance() == 2)
{
node = key.CompareTo(node.Left.Key) < 0 ? RotateRight(node) : RotateLeftRight(node);
}
}
else if (key.CompareTo(node.Key) > 0)
{
node.Right = Insert(key, value, node.Right);
if (node.GetBalance() == -2)
{
node = key.CompareTo(node.Right.Key) > 0 ? RotateLeft(node) : RotateRightLeft(node);
}
}
else
{
node.Value = value;
}
node.RecalculateHeight();
return(node);
}
private NearestSmallerNode <TKey, TValue> RotateRight(NearestSmallerNode <TKey, TValue> node1)
{
var node2 = node1.Left;
node1.Left = node2.Right;
node2.Right = node1;
node1.RecalculateHeight();
node2.RecalculateHeight();
return(node2);
}
public void Insert(TKey key, TValue value)
{
root = Insert(key, value, root);
}
private NearestSmallerNode <TKey, TValue> RotateRightLeft(NearestSmallerNode <TKey, TValue> node1)
{
node1.Right = RotateRight(node1.Right);
return(RotateLeft(node1));
}