private Grid2 <Octopus> LoadGrid()
{
string[] input = File.ReadAllLines("Day11Input.txt");
Grid2 <Octopus> grid = new Grid2 <Octopus>(input[0].Length, input.Length);
foreach (Point2 point in grid.Points)
{
grid[point] = new Octopus(input[point.Y][point.X] - '0');
}
return(grid);
}
private void TryFlash(Grid2 <Octopus> grid, Point2 point)
{
Octopus o = grid[point];
if (o.Energy > 9 && !o.HasFlashed)
{
o.HasFlashed = true;
foreach (Point2 neighbor in point.Surrounding(grid.Bounds))
{
grid[neighbor].Energy++;
TryFlash(grid, neighbor);
}
}
}
public static void Run()
{
var inputs = File.ReadAllLines("Day11Input.txt");
Octopus[,] grid = new Octopus[10, 10];
//Setup the grid
for (int i = 0; i < inputs.Length; i++)
{
for (int j = 0; j < inputs.Length; j++)
{
grid[i, j] = new Octopus(inputs[i][j]);
}
}
long flashes = 0;
int count = 0;
while (true)
{
//set the grid
bool stepComplete = false;
for (int j = 0; j < 10; j++)
{
for (int k = 0; k < 10; k++)
{
if (grid[j, k].hasFired)
{
grid[j, k].energy = 0;
}
grid[j, k].energy++;
grid[j, k].hasFired = false;
}
}
while (!stepComplete)
{
stepComplete = true;
for (int j = 0; j < 10; j++)
{
for (int k = 0; k < 10; k++)
{
if (!grid[j, k].hasFired && grid[j, k].energy > 9)
{
//Octopus hasn't fired and energy above 9 - take cover!
flashes += FireOctopus(j, k, grid);
stepComplete = false;
}
}
}
}
count++;
if (count == 100)
{
Console.WriteLine("Part 1 - " + flashes);
}
bool inSync = true;
for (int i = 0; i < inputs.Length; i++)
{
for (int j = 0; j < inputs.Length; j++)
{
if (!grid[i, j].hasFired)
{
inSync = false;
break;
}
}
if (!inSync)
{
break;
}
}
if (inSync)
{
break;
}
}
Console.WriteLine("Part 2 - " + count);
}