public static Ferry NewFerryWithSwitchedPlaces(Ferry oldFerry)
{
var newFerry = new Ferry();
newFerry.TileMap = new Dictionary <Point, FloorTile>();
foreach (var tile in oldFerry.TileMap)
{
var newSeat = new Seat {
IsOccupied = true
};
if (tile.Value.Seat is null)
{
newSeat = null;
}
else if (tile.Value.Seat.IsOccupied && tile.Value.AreMyNeighboursOccupied(tile.Key, 4))
{
newSeat.IsOccupied = false;
}
else if (!tile.Value.Seat.IsOccupied && tile.Value.AreMyNeighboursOccupied(tile.Key, 1))
{
newSeat.IsOccupied = false;
}
newFerry.TileMap.Add(tile.Key, new FloorTile
{
Coordinate = tile.Key,
Ferry = newFerry,
Seat = newSeat
});
}
return(newFerry);
}
public bool AreEqual(Ferry ferry2)
{
foreach (var tile in TileMap)
{
var tileToCompare = ferry2.TileMap[tile.Key];
if (tile.Value.Seat is null && tileToCompare.Seat is null)
{
continue;
}
if (tile.Value.IsOccupied == tileToCompare.IsOccupied)
{
continue;
}
return(false);
}
return(true);
}
private static int First(List <string> input)
{
var ferry = new Ferry(input);
bool differentFromLast;
var sw = new Stopwatch();
do
{
sw.Start();
var newFerry = NewFerryWithSwitchedPlaces(ferry);
differentFromLast = !ferry.AreEqual(newFerry);
ferry = newFerry;
sw.Stop();
Debug.WriteLine(sw.Elapsed);
sw.Reset();
} while (differentFromLast);
return(ferry.OccupiedTiles);
}
public static Ferry NewFerryWithSwitchedPlaces2(Ferry oldFerry)
{
var newFerry = new Ferry();
newFerry.TileMap = new Dictionary <Point, FloorTile>();
foreach (var tile in oldFerry.TileMap)
{
var newSeat = new Seat();
if (tile.Value.Seat is null)
{
newSeat = null;
}
else if (tile.Value.Seat.IsOccupied && tile.Value.NumberOfTilesInLineOfSight() >= 5)
{
newSeat.IsOccupied = false;
}
else if (!tile.Value.Seat.IsOccupied && tile.Value.NumberOfTilesInLineOfSight() == 0)
{
newSeat.IsOccupied = true;
}
else
{
newSeat.IsOccupied = tile.Value.Seat.IsOccupied;
}
var ft = new FloorTile
{
Coordinate = tile.Key,
Ferry = newFerry,
Seat = newSeat
};
newFerry.TileMap.Add(tile.Key, ft);
}
return(newFerry);
}