private void SerializeUsingDictionary(NaryNode root, ref Dictionary <int, IList <int> > dict)
{
if (root == null)
{
return;
}
if (root.children != null)
{
foreach (var child in root.children)
{
if (child != null)
{
if (dict.ContainsKey(root.val))
{
dict[root.val].Add(child.val);
}
else
{
dict[root.val] = new List <int>()
{
child.val
};
}
}
SerializeUsingDictionary(child, ref dict);
}
}
}
private void LevelOrderTraversal(NaryNode root)
{
if (root == null)
{
return;
}
Queue <NaryNode> queue = new Queue <NaryNode>();
queue.Enqueue(root);
while (queue.Count > 0)
{
NaryNode cur = queue.Dequeue();
Console.WriteLine(cur.val);
if (cur.children != null)
{
foreach (var child in cur.children)
{
if (child != null)
{
queue.Enqueue(child);
}
}
}
}
}
private void PostOrderTraversalRecur(NaryNode root)
{
if (root == null)
{
return;
}
if (root.children != null)
{
foreach (var child in root.children)
{
PostOrderTraversalRecur(child);
}
}
Console.WriteLine(root.val);
}
private void InsertNode(NaryNode root, int value, int parentValue = -1)
{
if (root == null)
{
if (parentValue == -1)
{
this.root = new NaryNode(value);
}
return;
}
if (root.val == parentValue)
{
if (root.children == null)
{
root.children = new List <NaryNode>()
{
new NaryNode(value)
}
}
;
else
{
root.children.Add(new NaryNode(value));
}
return;
}
if (root.children != null)
{
foreach (var child in root.children)
{
if (child != null)
{
InsertNode(child, value, parentValue);
}
}
}
}
public NaryTree()
{
root = null;
}
public NaryNodeWithLevel(NaryNode n, int l)
{
node = n;
level = l;
}
private string SerializeLevel(NaryNode root)
{
if (root == null)
{
return("null");
}
List <string> resultList = new List <string>();
Queue <NaryNodeWithLevel> queue = new Queue <NaryNodeWithLevel>();
queue.Enqueue(new NaryNodeWithLevel(root, 0));
queue.Enqueue(new NaryNodeWithLevel(null, 0));
int currentLevel = 0;
while (queue.Count > 0)
{
NaryNodeWithLevel cur = queue.Dequeue();
if (currentLevel < cur.level)
{
currentLevel = cur.level;
queue.Enqueue(new NaryNodeWithLevel(null, currentLevel));
}
if (cur.node == null)
{
// result = string.Concat(result, " null");
resultList.Add("null");
continue;
}
//result = string.Concat(result, " ", cur.node.val);
resultList.Add(cur.node.val.ToString());
if (cur.node.children != null)
{
foreach (var child in cur.node.children)
{
if (child != null)
{
queue.Enqueue(new NaryNodeWithLevel(child, cur.level + 1));
}
}
}
else
{
queue.Enqueue(new NaryNodeWithLevel(null, cur.level + 1));
}
}
for (int i = resultList.Count - 1; i >= 0; i--)
{
if (resultList[i] == "null")
{
resultList.RemoveAt(i);
}
else
{
break;
}
}
return(string.Join(" ", resultList));
}