static void Part1(Cups cups)
{
for (int i = 0; i < 100; ++i)
{
cups.Move();
}
// zero based indexing
Cup one = cups.Find(0);
Console.WriteLine("Part 1: {0}", string.Join("", one.Labels().Select(label => label + 1).Skip(1)));
}
public void Move()
{
Cup pickup = _current.Pickup();
HashSet <int> pickupLabels = new(pickup.Labels());
int destLabel = (_current.Label + _cups.Count - 1) % _cups.Count;
while (pickupLabels.Contains(destLabel))
{
destLabel = (destLabel + _cups.Count - 1) % _cups.Count;
}
_cups[destLabel].Place(pickup);
_current = _current.Next;
}