/// <summary>
/// Metho to Search node in binary search tree
/// </summary>
/// <param name="element"></param>
/// <param name="node"></param>
/// <returns></returns>
public bool Search(T element, BST <T> node)
{
if (node == null)
{
return(false);
}
if (node.NodeData.Equals(element))
{
// Console.WriteLine("Found the element in BST" + " " + node.NodeData);
result = true;
}
else if (node.NodeData.CompareTo(element) < 0)
{
Search(element, node.RightTree);
}
else
{
Search(element, node.LeftTree);
}
return(result);
}
/// <summary>
/// Reads binary data from a file to construct a BST object
/// </summary>
/// <param name="TreeStoreFile"></param>
/// <returns></returns>
public BST ReadBSTFromFile(string TreeStoreFile)
{
try
{
//Make sure that a file exists
if (!File.Exists(TreeStoreFile))
{
File.Create(TreeStoreFile);
}
BST bst = new BST();
Stream DeserializationFileStream = File.OpenRead(TreeStoreFile);
BinaryFormatter deserializer = new BinaryFormatter();
bst = (BST)deserializer.Deserialize(DeserializationFileStream);
DeserializationFileStream.Close();
return(bst);
}
catch
{
throw new Exception("Some error occured while reading tree data from file");
}
}
public BST Insert(int value)
{
Stack <BST> stack = new Stack <BST>();
stack.Push(this);
while (stack.Count > 0)
{
BST node = stack.Pop();
if (value < node.value)
{
if (node.left != null)
{
stack.Push(node.left);
}
else
{
node.left = new BST(value);
}
}
else
{
if (node.right != null)
{
stack.Push(node.right);
}
else
{
node.right = new BST(value);
}
}
}
return(this);
}
static void Main(string[] args)
{
var random = new Random();
var bst = new BST();
var list = new List <int>();
for (int i = 0; i < 100; i++)
{
list.Add(random.Next(1, 200));
}
foreach (var item in list)
{
bst.Insert(item);
}
bst.Inorder();
Console.ReadKey();
foreach (var item in list)
{
bst.Delete(item);
}
bst.Inorder();
Console.ReadKey();
}
public void Dispose()
{
parent = null;
nCurrent = null;
qNodes = null;
}
public BreadthFirstEnumerator(BST <T> parent)
{
this.parent = parent;
Reset();
}
static void Main(string[] args)
{
try
{
ObjectPersistence persister = new ObjectPersistence();
const string TreeStoreFile = @"D:\SavedTree.bin";
#region Construct the tree
Console.WriteLine("Constructing tree...\t");
BST bst = new BST();
bst.Insert(20);
bst.Insert(25);
bst.Insert(45);
bst.Insert(15);
bst.Insert(67);
bst.Insert(43);
bst.Insert(80);
bst.Insert(33);
bst.Insert(67);
bst.Insert(99);
bst.Insert(91);
#endregion
#region Traverse the tree
Console.WriteLine(@"----------------------------------------------------
Before serialization and de-serialization");
Console.WriteLine("\nInorder Traversal (Left - Root - Right):");
bst.Inorder(bst.GetRoot());
Console.WriteLine("\nPreorder Traversal (Root - Left - Right): ");
bst.Preorder(bst.GetRoot());
Console.WriteLine("\nPostorder Traversal (Left - Right - Root): ");
bst.Postorder(bst.GetRoot());
#endregion
#region Serialize and de-serialize the tree to and from a file
Console.WriteLine(@"
----------------------------------------------------
Storing (serializing) tree to file...");
persister.StoreBSTToFile(bst, TreeStoreFile);
Console.WriteLine(string.Format("Tree saved to {0} in binary format\nDe-serializing in process...\t", TreeStoreFile));
bst = persister.ReadBSTFromFile(TreeStoreFile);
Console.WriteLine("\nAfter serialization and de-serialization");
Console.WriteLine("\nInorder Traversal (Left - Root - Right):");
bst.Inorder(bst.GetRoot());
Console.WriteLine("\nPreorder Traversal (Root - Left - Right): ");
bst.Preorder(bst.GetRoot());
Console.WriteLine("\nPostorder Traversal (Left - Right - Root): ");
bst.Postorder(bst.GetRoot());
#endregion
#region Finding maximum, minimum and size of BST
Console.WriteLine(@"
----------------------------------------------------
Other details of the tree");
Console.WriteLine("Minimum value in the tree: " + bst.GetMinimum(bst.GetRoot()));
Console.WriteLine("Maximum value in the tree: " + bst.GetMaximum(bst.GetRoot()));
Console.WriteLine("Size of the tree: " + bst.GetSize(bst.GetRoot()));
#endregion
}
catch (Exception ex)
{
Console.WriteLine("Oops!\n" + ex.Message);
}
//Keep the console running
Console.WriteLine("\nPRESS ENTER TO TERMINATE...");
Console.ReadLine();
}
static void TestClear(BST <int> bst)
{
bst.Clear();
Console.WriteLine("Tree Contents after Clear: " + bst.ToString());
Console.WriteLine("Count: " + bst.Count);
}
static void TestIterate(BST <int> bst)
{
bst.Iterate(DoSomethingToAnInt, TraversalOrder.PRE_ORDER);
}
public static void Main(string[] args)
{
var algorithm = new Algorithm();
//int sum = 0;
//int i = 0;
#if SKOLA
foreach (var line in File.ReadLines("dictionary.txt"))
#endif
#if MOJE
foreach (var line in File.ReadLines("myDictionary.txt"))
#endif
{
var word = Word.FromLine(line);
algorithm.Add(word);
//sum += word.Count;
//i++;
//Console.WriteLine($"{i} -> {sum} -> {word.Count} -> {word.Probability}");
}
foreach (var dummy in algorithm.Dummies)
{
algorithm.AddDummyToKey(dummy);
}
algorithm.FillEmptyDummiesForKeys();
//Console.WriteLine(sum);
//var s = 0;
//foreach (var key in algorithm.Keys)
//{
// Console.WriteLine($"{key} -> {string.Join(", ", algorithm.KeyDummies[s])}");
// s++;
//}
//Console.WriteLine($"dn -> {string.Join(", ", algorithm.KeyDummies[algorithm.Keys.Count])}");
//Console.WriteLine("----------------------");
//foreach (var dummy in algorithm.Dummies)
//{
// Console.WriteLine(dummy);
//}
Console.WriteLine(algorithm.KeyDummies.Values.Sum(v => v.Count));
var result = algorithm.OptimalBst();
//var p = new[] { 0.15, 0.10, 0.05, 0.10, 0.20, };
//var q = new[] { 0.05, 0.10, 0.05, 0.05, 0.05, 0.10, };
//var result2 = Algorithm.OptimalBst(p, q);
//foreach (var e in result.Item1)
//{
// foreach (var e2 in e)
// {
// Console.Write($"{e2}, ");
// }
// Console.WriteLine();
//}
//Console.WriteLine("--------------------------------");
//foreach (var e in result.Item2)
//{
// foreach (var e2 in e)
// {
// Console.Write($"{e2}, ");
// }
// Console.WriteLine();
//}
for (var i = 0; i < result.Item2.Length; i++)
{
for (var j = 0; j < result.Item2[i].Length; j++)
{
result.Item2[i][j]--;
}
}
//var table = result.Item2;
//var rootIndex = table[0][table[0].Length - 1];
//var root = algorithm.Keys[rootIndex];
//Console.WriteLine(root);
//var leftIndex = table[0][rootIndex - 1];
//var left = algorithm.Keys[leftIndex];
//Console.WriteLine(left);
//var rightIndex = table[rootIndex + 1][table[0].Length - 1];
//var right = algorithm.Keys[rightIndex];
//Console.WriteLine(right);
var bst = BST.FromTable(algorithm.Keys, algorithm.KeyDummies, result.Item2);
Console.WriteLine(BSTCost.Calculate(bst));
Console.WriteLine($"after - {bst.Search("after")}");
Console.WriteLine($"i - {bst.Search("i")}");
Console.WriteLine($"if - {bst.Search("if")}");
Console.WriteLine($"mr - {bst.Search("mr")}");
Console.WriteLine($"own - {bst.Search("own")}");
Console.WriteLine($"very - {bst.Search("very")}");
Console.WriteLine($"year - {bst.Search("year")}");
Console.WriteLine($"yes - {bst.Search("yes")}");
Console.WriteLine($"our - {bst.Search("our")}");
Console.WriteLine($"might - {bst.Search("might")}");
}
public DepthFirstEnumerator(BST <T> parent)
{
this.parent = parent;
}
/// <summary>
/// constructor and pass parameter
/// </summary>
/// <param name="nodeData"></param>
public BST(T nodeData)
{
NodeData = nodeData;
LeftTree = null;
RightTree = null;
}
public StackSorter(MyStack stack)
{
this.stack = stack;
tree = new BST();
}
public static BST FromTable(List <Word> keys, Dictionary <int, List <Word> > keyDummies, int[][] table)
{
var stack = new Queue <Help>();
var rootHelp = new Help(0, table.Length - 1);
stack.Enqueue(rootHelp);
var rootIndex = table[rootHelp.Row][rootHelp.Column];
var rootItem = new BSTItem(keys[rootIndex]);
var bst = new BST(rootItem);
keys[rootIndex].Added = true;
while (stack.Count != 0)
{
var current = stack.Dequeue();
if (current.Row > current.Column)
{
if (keyDummies[current.Row].Count > 0 && !keyDummies[current.Row][0].Added)
{
bst.Add(new BSTItem(keyDummies[current.Row]));
keyDummies[current.Row][0].Added = true;
}
//if (current.Row < keyDummies.Count - 1)
//{
// if (keyDummies[current.Row + 1].Count > 0 && !keyDummies[current.Row + 1][0].Added)
// {
// bst.Add(new BSTItem(keyDummies[current.Row + 1]));
// keyDummies[current.Row + 1][0].Added = true;
// }
//}
if (keyDummies[current.Column + 1].Count > 0 && !keyDummies[current.Column + 1][0].Added)
{
bst.Add(new BSTItem(keyDummies[current.Column + 1]));
keyDummies[current.Column + 1][0].Added = true;
}
}
else
{
var currentItemIndex = table[current.Row][current.Column];
stack.Enqueue(new Help(current.Row, currentItemIndex - 1));
stack.Enqueue(new Help(currentItemIndex + 1, current.Column));
if (keys[currentItemIndex].Added)
{
continue;
}
//var subBst = new BST(new BSTItem(keys[currentItemIndex]));
bst.Add(new BSTItem(keys[currentItemIndex]));
keys[currentItemIndex].Added = true;
//if (current.Row == current.Column)
//{
// subBst.Add(new BSTItem(keyDummies[currentItemIndex]));
// subBst.Add(new BSTItem(keyDummies[currentItemIndex + 1]));
//}
}
}
return(bst);
}
