public static async Task RunProgramAsync(
long[] program,
Func <CancellationToken, ValueTask <long> > read,
Func <long, CancellationToken, ValueTask> write,
CancellationToken cancellationToken = default)
{
var vm = new IntcodeMachine(program, read, write);
await vm.StepUntilHalted(cancellationToken);
}
static void Main(string[] args)
{
var code = File.ReadLines(args.FirstOrDefault() ?? "input.txt").FirstOrDefault();
var program = IntcodeMachine.ParseCode(code);
// Part 1
RunPart1(program);
// Part 2
RunPart2(program);
}