public void GetNeighborTest(int x, int y, params char[] expected)
{
var cell = new Grid2d.Cell(new Position(x, y), 'c');
var cells = grid.GetNeighbors(cell);
var c = cells.Select(n => n.Character).ToArray();
Assert.AreEqual(expected, c);
Assert.AreEqual(expected.Length, cells.Count);
}
private int DoFlashes()
{
var hasFlashed = new HashSet <Grid2d.Cell>();
grid.ForEach(c => c.Value++);
var flashers = grid.GetCells(c => c.Value > 9 && !hasFlashed.Contains(c));
while (flashers.Any())
{
flashers.ForEach(c =>
{
hasFlashed.Add(c);
grid.GetNeighbors(c).ForEach(n => n.Value++);
});
flashers = grid.GetCells(c => c.Value > 9 && !hasFlashed.Contains(c));
}
hasFlashed.ForEach(c => c.Value = 0);
return(hasFlashed.Count);
}
public override string SolvePart1() => grid .Where(c => grid.GetNeighbors(c).All(n => n.Value > c.Value)) .Sum(c => c.Value + 1).ToString();
