public async Task <long> Part2(string input = null)
{
var lines = await File.ReadAllLinesAsync("inputs\\20.txt");
var blocks = SplitExtension.Split(lines, "");
var tiles = blocks.Select(b => new Tile(b.ToList())).ToList();
var neighbours = tiles.Select(t => t.PotentialNeighbours(tiles));
var edges = tiles.Where(t => t.PotentialNeighbours(tiles).ToList().Count(x => x == 0) >= 1);
// edges.Count().Should().Be(44);
var megaTile = new MegaTile(tiles);
return(IterateMegaTilePart2(megaTile));
}
private static long IterateMegaTilePart2(MegaTile megaTile)
{
var operationOrder = new[]
