public override async ValueTask <string> Solve_1()
{
var flashCout = 0;
for (int i = 0; i < 100; i++)
{
foreach (var item in _input)
{
_input[item.pos]++;
}
List <(System.Drawing.Point pos, char value)> toFlash = new();
do
{
toFlash = _input.Where(x => x.value > '9' && x.value != '+').ToList();
foreach (var item in toFlash)
{
_input[item.pos] = '+';
flashCout++;
var neigh = _input.Get8NeighborsOf(item.pos);
foreach (var n in neigh.Where(x => _input[x] != '+'))
{
_input[n]++;
}
}
} while (toFlash.Any());
foreach (var item in _input.Where(x => x.value == '+'))
{
_input[item.pos] = '0';
}
}
return(flashCout.ToString());
}
public override async ValueTask <string> Solve_1()
{
var steps = 0;
// Key = Source
var moves = new Dictionary <Point, (Point to, char c)>();
do
{
moves.Clear();
steps++;
var eastMoves = new HashSet <Point>();
foreach (var cc in _grid.Where(it => it.value == '>'))
{
var neighbor = _grid.GetTupleWraparound(cc.pos.MoveTo(Direction.Right));
if (neighbor.value == '.')
{
moves.Add(cc.pos, (neighbor.pos, '>'));
eastMoves.Add(neighbor.pos);
}
}
foreach (var cc in _grid.Where(it => it.value == 'v'))
{
var neighbor = _grid.GetTupleWraparound(cc.pos.MoveTo(Direction.Down));
if ((neighbor.value == '.' && !eastMoves.Contains(neighbor.pos)) ||
(neighbor.value == '>' && moves.ContainsKey(neighbor.pos)))
{
moves.Add(cc.pos, (neighbor.pos, 'v'));
}
}
if (moves.Count > 0)
{
foreach (var sourceField in moves.Keys)
{
_grid[sourceField] = '.';
}
foreach (var(to, c) in moves.Values)
{
_grid[to] = c;
}
}
} while (moves.Count > 0);
return(steps.ToString());
}
public override string Solve_1()
{
var hasChanged = false;
do
{
hasChanged = false;
var newgrid = new FiniteGrid2D <char>(grid);
foreach (var(pos, value) in grid.Where(cell => cell.value != '.'))
{
var newv = Life(pos);
if (newv != null)
{
newgrid[pos] = newv.Value;
hasChanged = true;
}
}
grid = newgrid;
} while (hasChanged);
return(grid.Count(cell => cell.value == '#').ToString());
}