public override (string message, object answer) SolvePart2()
{
LightBoard board = new LightBoard(
turnOn: x => x + 1,
turnOff: x => Math.Max(0, x - 1),
toggle: x => x + 2
);
return("Total brightness: ", RunInstructions(board));
}
public override (string message, object answer) SolvePart1()
{
LightBoard board = new LightBoard(
turnOn: x => 1,
turnOff: x => 0,
toggle: x => x == 0 ? 1 : 0
);
return("Lit lights: ", RunInstructions(board));
}
private int RunInstructions(LightBoard board)
{
foreach (Instruction instruction in _instructions)
{
switch (instruction.type)
{
case InstructionType.TurnOn: board.TurnOn(instruction.start, instruction.end); break;
case InstructionType.TurnOff: board.TurnOff(instruction.start, instruction.end); break;
case InstructionType.Toggle: board.Toggle(instruction.start, instruction.end); break;
}
}
return(board.brightness);
}
