public string SolvePart1(IEnumerable <string> inputs)
{
var machine = new IntCodeMachine(inputs.First());
var maxThrusterSignal = 0;
foreach (var phaseSettings in GetPhaseSettings(0, 1, 2, 3, 4))
{
var outputSignal = 0;
foreach (var phaseSetting in phaseSettings)
{
var input = new BlockingCollection <int>(new ConcurrentQueue <int>(new[] { phaseSetting, outputSignal }));
var output = new BlockingCollection <int>();
machine.Execute(input, output);
outputSignal = output.First();
}
if (outputSignal > maxThrusterSignal)
{
maxThrusterSignal = outputSignal;
}
}
return(maxThrusterSignal.ToString());
}
public string SolvePart2(IEnumerable <string> inputs)
{
var machine = new IntCodeMachine(inputs.First());
var input = new BlockingCollection <int>(new ConcurrentQueue <int>(new[] { 5 }));
var output = new BlockingCollection <int>();
machine.Execute(input, output);
if (output.Take(output.Count - 1).Any(o => o != 0))
{
throw new Exception("Diagnostic failed!");
}
return(output.Last().ToString());
}
public string SolvePart2(IEnumerable <string> inputs)
{
var machine = new IntCodeMachine(inputs.First());
var maxThrusterSignal = 0;
foreach (var phaseSettings in GetPhaseSettings(5, 6, 7, 8, 9))
{
var prevOutput = new BlockingCollection <int>();
var firstInput = prevOutput;
var amplifiers = phaseSettings.Select(phaseSetting =>
{
var input = prevOutput;
input.Add(phaseSetting);
var output = phaseSetting != phaseSettings.Last() ? new BlockingCollection <int>() : firstInput;
prevOutput = output;
return(Task.Factory.StartNew(() => machine.Execute(input, output)));
}).ToArray();
firstInput.Add(0);
Task.WaitAll(amplifiers);
var outputSignal = firstInput.Take();
if (outputSignal > maxThrusterSignal)
{
maxThrusterSignal = outputSignal;
}
}
return(maxThrusterSignal.ToString());
}