public long Part1(string[] input)
{
var computer = NavigationalComputer.Parse(input);
var current = new Coordinate(0, 0);
var direction = Direction.E;
foreach (var instruction in computer.Instructions)
{
var(coordinate, shipDirection) = computer.FollowOriginal(current, direction, instruction);
current = coordinate;
direction = shipDirection;
}
return(Math.Abs(current.X) + Math.Abs(current.Y)); // 582
}
public long Part2(string[] input)
{
var computer = NavigationalComputer.Parse(input);
var current = new Coordinate(0, 0);
var waypoint = new Coordinate(10, -1);
var direction = Direction.E;
foreach (var instruction in computer.Instructions)
{
var(cur, way, shipDirection) = computer.FollowWaypoint(current, waypoint, direction, instruction);
current = cur;
waypoint = way;
direction = shipDirection;
}
return(Math.Abs(current.X) + Math.Abs(current.Y)); // 52069
}
