public static int Calc()
{
List <MyOrbitData> Day6Output = new List <MyOrbitData>();
MyOrbitData RootData = new MyOrbitData
{
Code = "COM",
NumParents = 0,
HasSan = false,
HasYou = false,
ParentNode = null
};
CalcWithRootCode(RootData, 1, Day6Output);
var sum = Day6Output.Sum(x => x.NumParents);
foreach (MyOrbitData youNode in Day6Output.Where(x => x.HasYou))
{
GoBack(youNode);
}
foreach (MyOrbitData sanNode in Day6Output.Where(x => x.HasSan))
{
GoBack(sanNode);
}
var listHasBoth = Day6Output.Where(x => x.HasYou && x.HasSan).ToList();
var numHasBoth = Day6Output.Where(x => x.HasYou && x.HasSan).Count();
var numHasSan = Day6Output.Where(x => x.HasSan).Count();
var numHasYou = Day6Output.Where(x => x.HasYou).Count();
var numTransfers = numHasYou + numHasSan - 2 - 2 * numHasBoth;
return(sum);
}
public static void GoBack(MyOrbitData node)
{
var parentNode = node.ParentNode;
if (parentNode != null)
{
if (node.HasSan)
{
parentNode.HasSan = true;
}
if (node.HasYou)
{
parentNode.HasYou = true;
}
GoBack(parentNode);
}
}
public static int CalcWithRootCode(MyOrbitData parentNode, int ParentCount, List <MyOrbitData> Day6Output)
{
foreach (string code in Day6Input.Text.Where(s => ParentCode(s) == parentNode.Code).Select(ChildCode))
{
var hasSan = code == "SAN";
var hasYou = code == "YOU";
MyOrbitData NewData = new MyOrbitData
{
Code = code,
NumParents = ParentCount,
HasSan = code == "SAN",
HasYou = code == "YOU",
ParentNode = parentNode
};
Day6Output.Add(NewData);
CalcWithRootCode(NewData, ParentCount + 1, Day6Output);
}
return(ParentCount + 1);
}