public void DeepAllNodes(BSTNode <T> currentNode, int iterationType, List <BSTNode <T> > nodes)
{
DFSStep(currentNode, GetBranch(iterationType, 0), iterationType, nodes);
DFSStep(currentNode, GetBranch(iterationType, 1), iterationType, nodes);
DFSStep(currentNode, GetBranch(iterationType, 2), iterationType, nodes);
}
public BST(BSTNode <T> node)
{
Root = node;
_count = Root == null ? 0 : 1;
}
public bool DeleteNodeByKey(int key)
{
var nodeToDelete = FindNodeByKey(key);
if (!nodeToDelete.NodeHasKey)
{
return(false);
}
// Мы хотим удалить лист
if (nodeToDelete.Node.LeftChild == null && nodeToDelete.Node.RightChild == null)
{
if (nodeToDelete.Node.Parent == null)
{
Root = null;
}
else
{
BreakNode(nodeToDelete.Node);
}
}
// Мы хотим удалить узел с только левым потомком
else if (nodeToDelete.Node.LeftChild != null && nodeToDelete.Node.RightChild == null)
{
var insertNode = nodeToDelete.Node.LeftChild;
if (nodeToDelete.Node.Parent == null)
{
Root = insertNode;
insertNode.Parent = null;
}
else
{
BreakNode(nodeToDelete.Node);
InsertNode(nodeToDelete.Node.Parent, insertNode, nodeToDelete.Node.NodeKey);
}
}
// Узел с правым потомком
else
{
var insertNode = FinMinMax(nodeToDelete.Node.RightChild, false);
BreakNode(insertNode);
if (nodeToDelete.Node.Parent == null)
{
insertNode.LeftChild = nodeToDelete.Node.LeftChild;
insertNode.RightChild = nodeToDelete.Node.RightChild;
nodeToDelete.Node.LeftChild.Parent = insertNode;
nodeToDelete.Node.RightChild.Parent = insertNode;
Root = insertNode;
insertNode.Parent = null;
}
else
{
BreakNode(nodeToDelete.Node);
InsertNode(nodeToDelete.Node.Parent, insertNode, nodeToDelete.Node.NodeKey);
insertNode.LeftChild = nodeToDelete.Node.LeftChild;
insertNode.RightChild = nodeToDelete.Node.RightChild;
nodeToDelete.Node.LeftChild.Parent = insertNode;
nodeToDelete.Node.RightChild.Parent = insertNode;
}
}
_count--;
return(true);
}
public BSTFind()
{
Node = null;
}
BSTNode <T> GetNextNode(BSTNode <T> node, bool isRight)
{
return(isRight ? node.RightChild : node.LeftChild);
}