public DiscNode CreateNewOrGetExistingDisc(List <DiscNode> towerOfDiscs, string name)
{
DiscNode disc = towerOfDiscs.SingleOrDefault(d => d.Name == name);
if (disc == null)
{
disc = new DiscNode {
Name = name, Children = new List <DiscNode>()
};
towerOfDiscs.Add(disc);
}
return(disc);
}
public void CreateBalanceOnDisc(string line, DiscNode disc, List <DiscNode> towerOfDiscs)
{
string[] childNames = GetChildrenNames(line);
if (childNames == null)
{
return;
}
foreach (string childName in childNames)
{
DiscNode child = CreateNewOrGetExistingDisc(towerOfDiscs, childName);
disc.Children.Add(child);
child.Parent = disc;
}
}
public int Part2Solve(string[] lines)
{
List <DiscNode> towerOfDiscs = new List <DiscNode>();
foreach (string line in lines)
{
string name = GetDiscName(line);
DiscNode disc = CreateNewOrGetExistingDisc(towerOfDiscs, name);
CreateBalanceOnDisc(line, disc, towerOfDiscs);
}
DiscNode root = towerOfDiscs.Where(ti => ti.Parent == null).Single();
return(root.Weight);
}