public void CreateBstFromArray()
{
var array = Simple42;
BstNode FillSubTree(int min, int max)
{
var distance = max - min;
if (distance < 0)
{
return(null);
}
else if (distance == 0)
{
return(new BstNode(array[min]));
}
else
{
var mid = min + distance / 2;
var root = new BstNode(array[mid]);
root.Left = FillSubTree(min, mid - 1);
root.Right = FillSubTree(mid + 1, max);
return(root);
}
}
var tree = FillSubTree(0, array.GetUpperBound(0));
Debug.WriteLine(tree.Value);
}
BstNode <T> Add(BstNode <T> node, T item)
{
if (node == null)
{
++Count;
return(new BstNode <T> {
Key = item
});
}
var d = compare(item, node.Key);
if (d == 0)
{
return(node);
}
if (d < 0)
{
node.TypedLeft = Add(node.TypedLeft, item);
}
else
{
node.TypedRight = Add(node.TypedRight, item);
}
return(node);
}
public static BstNode FindInOrderSuccessor(BstNode node, BstNode root)
{
BstNode result = null;
if (node.Right == null)
{
BstNode current = root;
while (true)
{
if (current.Value == node.Value)
{
break;
}
if (current.Value > node.Value)
{
result = current;
current = current.Left;
}
else if (current.Value < node.Value)
{
current = current.Right;
}
}
}
else
{
result = node.Right;
while (result.Left != null)
{
result = result.Left;
}
}
return(result);
}
public bool AddUnique(T value)
{
if (Root == null)
{
Root = new BstNode <T>(value);
return(true);
}
BstNode <T> node, lastNode;
if (Find(Root, value, out node, out lastNode))
{
return(false);
}
if (value.CompareTo(lastNode.Value) < 0)
{
lastNode.Left = new BstNode <T>(value);
}
else
{
lastNode.Right = new BstNode <T>(value);
}
return(true);
}
public void Add(T value)
{
if (Root == null)
{
Root = new BstNode <T>(value);
return;
}
BstNode <T> node, lastNode;
if (Find(Root, value, out node, out lastNode))
{
node.Right = new BstNode <T>(value)
{
Right = node.Right
};
return;
}
if (value.CompareTo(lastNode.Value) < 0)
{
lastNode.Left = new BstNode <T>(value);
}
else
{
lastNode.Right = new BstNode <T>(value);
}
}
// Suppose t != null.
void RemoveTarget(BstNode <T> t)
{
if (t.TypedLeft == null || t.TypedRight == null)
{
var c = t.TypedLeft ?? t.TypedRight;
if (t.TypedParent == null)
{
Root = c;
}
else if (t.TypedParent.TypedLeft == t)
{
t.TypedParent.TypedLeft = c;
}
else
{
t.TypedParent.TypedRight = c;
}
}
else
{
var t2 = t.SearchNextNode() as BstNode <T>;
t.Key = t2.Key;
RemoveTarget(t2);
}
}
private static void Main(string[] args)
{
BSTOperations operations = new BSTOperations();
operations.Insert(15);
operations.Insert(20);
operations.Insert(10);
operations.Insert(25);
operations.Insert(17);
operations.Insert(8);
operations.Insert(12);
operations.Insert(5);
operations.Insert(30);
operations.Insert(40);
operations.Insert(55);
operations.Insert(7);
operations.Insert(28);
operations.Insert(22);
System.Console.Write("DFS: ");
BSTOperations.TraverseTreeDFS(BSTOperations.root);
System.Console.WriteLine();
BSTOperations.TraverseBFS(BSTOperations.root);
//Delete
BSTOperations.Delete(BSTOperations.root, 20);
System.Console.Write("DFS: ");
BSTOperations.TraverseTreeDFS(BSTOperations.root);
System.Console.WriteLine();
BSTOperations.TraverseBFS(BSTOperations.root);
System.Console.WriteLine("Height: " + BSTOperations.GetHeight(BSTOperations.root));
int itemToFind = 25;
var value = BSTOperations.FindItem(BSTOperations.root, itemToFind);
if (value == -1)
{
System.Console.WriteLine("Item not found");
}
else
{
System.Console.WriteLine("Item Found");
}
BstNode min = BSTOperations.FindMin(BSTOperations.root);
if (min != null)
{
System.Console.WriteLine("Min: " + min.Data);
}
BstNode max = BSTOperations.FindMax(BSTOperations.root);
if (max != null)
{
System.Console.WriteLine("Max: " + max.Data);
}
System.Console.WriteLine("Is Binary search tree? " + BSTOperations.IsBinarySearchTree(BSTOperations.root));
}
public void add(int value)
{
if (this.root == null)
{
this.root = new BstNode(value);
return;
}
this.add(value, this.root);
}
public static void PostOrderTraversal(BstNode root)
{
if (root == null)
{
return;
}
PostOrderTraversal(root.left); // process the left
PostOrderTraversal(root.right); // process the right
Console.WriteLine("PostOrderTraversal at node {0}", root.data); // process the root
}
private void TraversalPostOrder(BstNode <T> node, Action <BstNode <T> > action)
{
if (node == null)
{
return;
}
TraversalPostOrder(node.Left, action);
TraversalPostOrder(node.Right, action);
action(node);
}
private int Depth(BstNode <T> node)
{
if (node == null)
{
return(0);
}
var leftDepth = Depth(node.Left);
var rightDepth = Depth(node.Right);
return(leftDepth > rightDepth ? leftDepth + 1 : rightDepth + 1);
}
public void drawNode(BstNode node, Transform targetTransform)
{
BstNodeUi nodeUi = ObjectPool.Instantiate(NodePrefab, targetTransform).GetComponent <BstNodeUi>();
nodeUi.valueText.text = node.mValue.ToString();
if (node.rightNode != null)
{
drawNode(node.rightNode, nodeUi.rightTransform);
}
if (node.leftNode != null)
{
drawNode(node.leftNode, nodeUi.leftTransform);
}
}
public void TestFindInOrderSuccessor()
{
BstNode root = new BstNode(10);
root.Left = new BstNode(5);
root.Right = new BstNode(30);
root.Right.Left = new BstNode(22);
root.Right.Right = new BstNode(35);
BstNode result = Problem133.FindInOrderSuccessor(root.Left, root);
Assert.AreEqual(10, result.Value);
result = Problem133.FindInOrderSuccessor(root.Right.Left, root);
Assert.AreEqual(30, result.Value);
result = Problem133.FindInOrderSuccessor(root.Right, root);
Assert.AreEqual(35, result.Value);
result = Problem133.FindInOrderSuccessor(root.Right.Right, root);
Assert.AreEqual(null, result);
result = Problem133.FindInOrderSuccessor(root, root);
Assert.AreEqual(22, result.Value);
}
public void Insert(ref BstNode node)
{
if (firstNode == null)
{
firstNode = node;
return;
}
else
{
bool addToLeft;
BstNode targetNode = findInsertionPoint(node.mValue, out addToLeft);
node.parentNode = targetNode;
if (addToLeft)
{
targetNode.leftNode = node;
}
else
{
targetNode.rightNode = node;
}
}
}
public BstNode findInsertionPoint(int Amount, out bool addToLeft)
{
bool found = false;
addToLeft = false;
BstNode node = firstNode;
while (!found)
{
if (Amount > node.mValue)
{
if (node.rightNode == null)
{
found = true;
addToLeft = false;
continue;
}
else
{
node = node.rightNode;
}
}
else
{
if (node.leftNode == null)
{
found = true;
addToLeft = true;
continue;
}
else
{
node = node.leftNode;
}
}
}
return(node);
}
private void add(int value, BstNode node)
{
// check right
if (value >= node.value)
{
if (node.right == null)
{
node.right = new BstNode(value);
return;
}
this.add(value, node.right);
}
// check left
else
{
if (node.left == null)
{
node.left = new BstNode(value);
return;
}
this.add(value, node.left);
}
}
private bool Find(BstNode <T> current, T value, out BstNode <T> node, out BstNode <T> lastNode)
{
var cmp = value.CompareTo(current.Value);
if (cmp == 0)
{
node = current;
lastNode = null;
return(true);
}
if ((cmp < 0 && current.Left == null) || (cmp > 0 && current.Right == null))
{
node = null;
lastNode = current;
return(false);
}
return(cmp < 0
? Find(current.Left, value, out node, out lastNode)
: Find(current.Right, value, out node, out lastNode));
}
private static void ValidateTheTree(BstNode <int> node)
{
Utility.TreeValidation(node);
}
public BstNode(BstNode parent, int Value)
{
mValue = Value;
nodesCount = 1;
parentNode = parent;
}
public Bst()
{
this.root = null;
}
public BinarySearchTree(int FirstValue)
{
firstNode = new BstNode(FirstValue);
}
public void AddToTree(int Value)
{
BstNode node = new BstNode(Value);
Insert(ref node);
}
public BstNode(int value)
{
this.value = value;
left = null;
right = null;
}
