static void ProcessCycles(DimensionSet dimension, int cycles, bool is4D)
{
for (int i = 1; i <= cycles; i++)
{
Dictionary <DimensionLocation, bool> newValues = new();
(DimensionLocation min, DimensionLocation max) = dimension.GetBounds();
for (int w = min.W - 1; w <= max.W + 1; w++)
{
if (!is4D && w != 0)
{
continue;
}
for (int z = min.Z - 1; z <= max.Z + 1; z++)
{
for (int y = min.Y - 1; y <= max.Y + 1; y++)
{
for (int x = min.X - 1; x <= max.X + 1; x++)
{
var location = new DimensionLocation(x, y, z, w);
bool active = dimension.IsActive(location);
var neighbors = location.GetNeighbors(is4D);
var activeNeighborCount = neighbors
.Where(x => dimension.IsActive(x))
.Count();
if (active)
{
newValues[location] = activeNeighborCount is 2 or 3;
}
else
{
newValues[location] = activeNeighborCount == 3;
}
}
}
}
}
foreach (KeyValuePair <DimensionLocation, bool> item in newValues)
{
dimension[item.Key] = item.Value;
}
Debug.WriteLine($"Cycle: {i}");
Debug.WriteLine("");
Debug.WriteLine(dimension);
Debug.WriteLine("");
}
}
static void Main(string[] args)
{
DimensionSet dimension = ParseDimension3D("input.txt");
Stopwatch watch = new Stopwatch();
watch.Start();
ProcessCycles(dimension, 6, is4D: false);
int activeCount6Cycles3D = dimension.Where(x => x.Value).Count();
watch.Stop();
Console.WriteLine($"Active count after 6 cycles in 3D: {activeCount6Cycles3D} - Elapsed: {watch.Elapsed}");
watch.Reset();
dimension = ParseDimension3D("input.txt");
watch.Start();
ProcessCycles(dimension, 6, is4D: true);
int activeCount6Cycles4D = dimension.Where(x => x.Value).Count();
watch.Stop();
Console.WriteLine($"Active count after 6 cycles in 4D: {activeCount6Cycles4D} - Elapsed: {watch.Elapsed}");
}
