public override async ValueTask <string> Solve_2()
{
var grid = _img;
var infChar = '.';
var infCharToggle = _algo[0] == '#';
for (int i = 0; i < 50; i++)
{
var inflated = grid.Bounds.InflatedCopy(1, 1);
grid = new FiniteGrid2D <char>(inflated, Step);
if (infCharToggle)
{
infChar = infChar == '.' ? '#' : '.';
}
}
//Console.WriteLine(grid.ToString());
return(grid.Count(cell => cell.value == '#').ToString());
char Step(Point p)
{
var area = grid.GetPointWith8Neighbors(p, infChar);
return(_algo[AreaToIndex(area)]);
}
}
public override async ValueTask <string> Solve_1()
{
var grid = _img;
var infChar = '.';
var infCharToggle = _algo[0] == '#';
for (int i = 0; i < 2; i++)
{
grid = new FiniteGrid2D <char>(grid, 1, infChar);
var nextgrid = new FiniteGrid2D <char>(grid);
foreach (var(pos, _) in grid)
{
var area = AreaToIndex(grid.GetPointWith8Neighbors(pos, infChar));
nextgrid[pos] = _algo[area];
}
grid = nextgrid;
if (infCharToggle)
{
infChar = infChar == '.' ? '#' : '.';
}
}
//Console.WriteLine(grid.ToString());
return(grid.Count(cell => cell.value == '#').ToString());
}
