public static Node BalanceNode(Node node)
{
int nodeCount = node.RightChilds + node.LeftChilds + 1;
int midVal = node.FindMinimalNode((nodeCount + 1) / 2); // take middle value
List <char> moves = node.FindNodeMoves(midVal); // find moves to find how come to new root
for (int i = moves.Count - 1; i > 0; i--)
{
Node tempNode = node;
for (int j = 0; j < i - 1; j++)
{
tempNode = (moves[j] == 'l') ? tempNode.LeftNode : tempNode.RightNode;
}
if (moves[i - 1] == 'l')
{
tempNode.LeftNode = (moves[i] == 'l') ?
Node.RotateRight(tempNode.LeftNode) : Node.RotateLeft(tempNode.LeftNode);
}
else
{
tempNode.RightNode = (moves[i] == 'l') ?
Node.RotateRight(tempNode.RightNode) : Node.RotateLeft(tempNode.RightNode);
}
}
if (moves.Count != 0)
{
node = (midVal < node.Number) ? Node.RotateRight(node) : Node.RotateLeft(node);
}
node.LeftNode = (node.LeftNode != null) ? Node.BalanceNode(node.LeftNode) : null;
node.RightNode = (node.RightNode != null) ? Node.BalanceNode(node.RightNode) : null;
return(node);
}