public static BigInteger GetDay22Part1Answer()
{
// After shuffling your factory order deck of 10007 cards, what is
// the position of card 2019?
// Answer: 2519
var input = GetDay22Input();
var shuffleInstructions = ShuffleHelper.GetShuffleInstructions(input);
var endCardIndex = ShuffleHelper.ShuffleCard(
startCardIndex: 2019,
deckSize: 10007,
numberOfShuffles: 1,
shuffleInstructions: shuffleInstructions,
runBackwards: false);
return(endCardIndex);
}
public static BigInteger GetDay22Part2Answer()
{
// When you get back, you discover that the 3D printers have
// combined their power to create for you a single, giant, brand
// new, factory order deck of 119315717514047 space cards.
// Finally, a deck of cards worthy of shuffling!
// You decide to apply your complete shuffle process(your puzzle
// input) to the deck 101741582076661 times in a row.
// You'll need to be careful, though - one wrong move with this
// many cards and you might overflow your entire ship!
// After shuffling your new, giant, factory order deck that many
// times, what number is on the card that ends up in position 2020?
// Answer: 58966729050483
var input = GetDay22Input();
var shuffleInstructions = ShuffleHelper.GetShuffleInstructions(input);
var endCardIndex = ShuffleHelper.ShuffleCard(
startCardIndex: 2020,
deckSize: BigInteger.Parse("119315717514047"),
numberOfShuffles: BigInteger.Parse("101741582076661"),
shuffleInstructions: shuffleInstructions,
runBackwards: true);
return(endCardIndex);
}