private static long Part2(IReadOnlyCollection <long> memoryState)
{
var amplifiers = new List <long> {
9, 8, 7, 6, 5
};
var amplifiersPermutations = Permutations.GeneratePermutations(amplifiers);
var signals = amplifiersPermutations.Select(permutation =>
{
var amps = permutation
.Select(phaseSetting => new IntCodeComputer(memoryState, phaseSetting))
.ToList();
var signal = 0L;
while (!amps.Last().IsHalted)
{
foreach (var amp in amps)
{
amp.Inputs.Enqueue(signal);
amp.RunIntCode();
signal = amp.Output.Last();
}
}
return(signal);
});
return(signals.Max());
}
private static long Part1(IReadOnlyCollection <long> memoryState)
{
var amplifiers = new List <long> {
0, 1, 2, 3, 4
};
var amplifiersPermutations = Permutations.GeneratePermutations(amplifiers);
var signals = amplifiersPermutations.Select(permutation =>
{
var signal = 0L;
foreach (var phaseSetting in permutation)
{
var amp = new IntCodeComputer(memoryState, phaseSetting, signal);
amp.RunIntCode();
signal = amp.Output.Last();
}
return(signal);
});
return(signals.Max());
}