public void Part_2_example()
{
var ship = new Ship2();
Assert.Equal((0, 0), (ship.Position.EastWestPosition, ship.Position.NorthSouthPosition));
Assert.Equal((10, 1), (ship.Waypoint.EastWestPosition, ship.Waypoint.NorthSouthPosition));
ship.Move('F', 10);
Assert.Equal((100, 10), (ship.Position.EastWestPosition, ship.Position.NorthSouthPosition));
Assert.Equal((10, 1), (ship.Waypoint.EastWestPosition, ship.Waypoint.NorthSouthPosition));
ship.Move('N', 3);
Assert.Equal((100, 10), (ship.Position.EastWestPosition, ship.Position.NorthSouthPosition));
Assert.Equal((10, 4), (ship.Waypoint.EastWestPosition, ship.Waypoint.NorthSouthPosition));
ship.Move('F', 7);
Assert.Equal((170, 38), (ship.Position.EastWestPosition, ship.Position.NorthSouthPosition));
Assert.Equal((10, 4), (ship.Waypoint.EastWestPosition, ship.Waypoint.NorthSouthPosition));
ship.Move('R', 90);
Assert.Equal((170, 38), (ship.Position.EastWestPosition, ship.Position.NorthSouthPosition));
Assert.Equal((4, -10), (ship.Waypoint.EastWestPosition, ship.Waypoint.NorthSouthPosition));
ship.Move('F', 11);
Assert.Equal((214, -72), (ship.Position.EastWestPosition, ship.Position.NorthSouthPosition));
Assert.Equal((4, -10), (ship.Waypoint.EastWestPosition, ship.Waypoint.NorthSouthPosition));
Assert.Equal(286, Part2(Example));
}
private static long Part2(ReadOnlyMemory <string> input)
{
var ship = new Ship2();
foreach (var line in input)
{
var(action, value) = Parse(line);
ship.Move(action, value);
}
return(Math.Abs(ship.Position.EastWestPosition) + Math.Abs(ship.Position.NorthSouthPosition));
}