public bool Add(int parentValue, int childValue)
{
if (this.Root != null)
{
TreeNode foundParentNode = this.FindNode(parentValue);
TreeNode foundChildNode = this.FindNode(childValue);
if (foundParentNode == null && foundChildNode != null)
{
// parent not found, child found
TreeNode parentNode = new TreeNode(parentValue);
parentNode.Children.Add(foundChildNode);
this.Root = parentNode;
return true;
}
else if (foundParentNode != null && foundChildNode == null)
{
// parent found, child not found
TreeNode childNode = new TreeNode(childValue);
foundParentNode.Children.Add(childNode);
return true;
}
return false;
}
else
{
TreeNode parentNode = new TreeNode(parentValue);
TreeNode childNode = new TreeNode(childValue);
parentNode.Children.Add(childNode);
this.Root = parentNode;
return true;
}
}
private void PushChildren(Stack<TreeNode> stack, TreeNode node)
{
List<TreeNode> children = node.Children;
for (int i = 0; i < children.Count; i++)
{
stack.Push(children[i]);
}
}
private bool CheckIsSumEqual(TreeNode node, long sum)
{
long tempSum = 0;
Stack<TreeNode> nodes = new Stack<TreeNode>();
nodes.Push(node);
while (nodes.Count != 0)
{
var currentNode = nodes.Pop();
tempSum += currentNode.Value;
for (int i = 0; i < currentNode.Children.Count; i++)
{
var child = currentNode.Children[i];
nodes.Push(child);
}
}
if (tempSum == sum)
{
return true;
}
return false;
}
public void ReadTree(TreeNode root = null)
{
if (root == null)
{
root = this.Root;
}
Console.WriteLine("\nRoot: " + root.Value);
Stack<TreeNode> stack = new Stack<TreeNode>();
this.PushChildren(stack, root);
while (stack.Count != 0)
{
TreeNode node = stack.Pop();
if (node.Children.Count != 0)
{
this.PushChildren(stack, node);
Console.WriteLine("Middle node: " + node.Value);
}
else
{
Console.WriteLine("Leaf node: " + node.Value);
}
}
}
