public void Day22Part1_TestSolutionByFollowingIndexInReverse()
{
string[] cmds = DayDataUtilities.ReadLinesFromFile("day22.txt");
Assert.NotNull(cmds);
Assert.Equal(100, cmds.Length);
SlamShufflerIndex sut = new SlamShufflerIndex(10007, 3324);
for (int i = cmds.Length - 1; i >= 0; i--)
{
sut.ShuffleCommandReverse(cmds[i]);
}
long actual = sut.TrackedIndex;
Assert.Equal(2019, actual);
}
public void Day22Part2_TestSolutionJustOnce()
{
// both are primes, 99% sure.
long deckSize = 119315717514047;
long shuffleTimes = 101741582076661;
string[] cmds = DayDataUtilities.ReadLinesFromFile("day22.txt");
Assert.NotNull(cmds);
Assert.Equal(100, cmds.Length);
SlamShufflerIndex sut = new SlamShufflerIndex(deckSize, 2020);
for (int i = cmds.Length - 1; i >= 0; i--)
{
sut.ShuffleCommandReverse(cmds[i]);
}
long actual = sut.TrackedIndex;
Assert.Equal(27321782275977, actual);
}