public int RightSiblingsCount(NaryTreeNode node)
{
if (node.parent != null)
{
var c = node.parent.children;
var i = c.IndexOf(node);
var l = (c.Count - 1) - i;
return(l);
}
return(0);
}
static void Main(string[] args)
{
var reader = new StreamReader("input.txt");
// int tests = int.Parse(Console.ReadLine());
int tests = int.Parse(reader.ReadLine());
for (int test = 0; test < tests; test++)
{
// int soldiers = int.Parse(Console.ReadLine());
int soldiers = int.Parse(reader.ReadLine());
// string[] parents = Console.ReadLine().Split(' ');
string[] parents = reader.ReadLine().Trim().Split(' ');
// Total Handshakes
int hs = 0;
// Total BumpFists
int bf = 0;
// Construct a tree given its parents array.
NaryTree tree = new NaryTree();
tree.CreateTreeFromParents(parents);
// For each node starting from root:
Queue <NaryTreeNode> queue = new Queue <NaryTreeNode>();
queue.Enqueue(tree.root);
while (queue.Count > 0)
{
NaryTreeNode currentNode = queue.Dequeue();
// bf = bf + total siblings on the right
bf = bf + tree.RightSiblingsCount(currentNode);
// Enqueue all the children of current node.
foreach (var child in currentNode.children)
{
queue.Enqueue(child);
}
}
// total handshakes
hs = tree.TotalChildren();
Console.WriteLine(hs + " " + bf);
}
Console.ReadLine();
}
public void CreateTreeFromParents(string[] parents)
{
int length = parents.Length;
created = new NaryTreeNode[length + 1];
int j = 0;
for (int i = 1; i <= length; i++)
{
int parent = int.Parse(parents[j++]);
if (created[i] == null)
{
created[i] = new NaryTreeNode(i);
}
if (parent == 0)
{
root = created[i];
continue;
}
if (created[parent] == null)
{
created[parent] = new NaryTreeNode(parent);
}
created[i].parent = created[parent];
created[i].parent.descendantsCount += 1 + created[i].descendantsCount;
created[parent].children.Insert(created[parent].children.Count, created[i]);
}
// Update the descendants
created = null;
}