internal static void Part2()
{
List <int> Input = EightInput.FullInput;
EightTree tree = BuildTree(Input);
Console.WriteLine($"Value of root node: {tree.RootValue}");
}
public static void Part1()
{
List <int> Input = EightInput.FullInput;
EightTree tree = BuildTree(Input);
Console.WriteLine($"Sum of all metadata: {tree.Sum}");
}
private static EightTree BuildTree(List <int> Input)
{
//int nodeLength = 1 + metadataLength + subnodeLengths;
int frontIndex = 0;
int sum = 0;
EightNode root = new EightNode(Input[frontIndex++], Input[frontIndex++]);
EightNode currentNode = root;
do
{
if (currentNode.ChildCount > 0 && currentNode.Children.Count != currentNode.ChildCount)
{
// "recurse"
EightNode child = new EightNode(Input[frontIndex++], Input[frontIndex++]);
child.Parent = currentNode;
currentNode.Children.Add(child);
currentNode = child;
}
else if (currentNode.MetadataCount > 0 && currentNode.Metadata.Count != currentNode.MetadataCount)
{
// read metadata
for (int i = 0; i < currentNode.MetadataCount; i++)
{
currentNode.Metadata.Add(Input[frontIndex++]);
}
sum += currentNode.Metadata.Sum();
currentNode = currentNode.Parent;
}
else
{
currentNode = currentNode.Parent;
}
}while (frontIndex < Input.Count);
EightTree tree = new EightTree(root);
tree.Sum = sum;
return(tree);
}
