static void Main(string[] args)
{
var lines = System.IO.File.ReadAllLines("input.txt");
var tiles = new Dictionary <HexCo, bool>();
foreach (var line in lines)
{
var hex = HexCo.GoPath(line);
if (!tiles.ContainsKey(hex))
{
tiles[hex] = true;
}
else
{
tiles[hex] = !tiles[hex];
}
}
var game = new GameOfTiles(tiles);
Console.WriteLine($"Initial state: {game.CountBlack()}");
for (int i = 0; i < 100; i++)
{
game.NextGen();
Console.WriteLine($"{i} - {game.CountBlack()}");
}
}
public void NextGen()
{
var nextgen = new Dictionary <HexCo, bool>();
var minx = tiles.Where(_ => _.Value).Min(c => c.Key.X) - 1;
var miny = tiles.Where(_ => _.Value).Min(c => c.Key.Y) - 1;
var maxx = tiles.Where(_ => _.Value).Max(c => c.Key.X) + 1;
var maxy = tiles.Where(_ => _.Value).Max(c => c.Key.Y) + 1;
for (var x = minx; x <= maxx; x++)
{
for (var y = miny; y <= maxy; y++)
{
var tile = new HexCo(x, y);
var isBlack = tiles.ContainsKey(tile) && tiles[tile];
var count = tile.Neighbors().Count(next => tiles.ContainsKey(next) && tiles[next]);
if (isBlack)
{
if (count == 0 || count > 2)
{
nextgen[tile] = false;
}
else
{
nextgen[tile] = true;
}
}
else // white
{
if (count == 2)
{
nextgen[tile] = true;
}
else
{
nextgen[tile] = false;
}
}
}
}
this.tiles = nextgen;
}
protected bool Equals(HexCo other)
{
return(X == other.X && Y == other.Y);
}
