public static int Run(IEnumerable <int> initialPositions)
{
var computer = new IntcodeComputer(initialPositions);
// 1202 program alarm
computer.SetInitialNounAndVerb(12, 2);
computer.Run();
return(computer.PeekResult());
}
private static void Part1()
{
var sw = System.Diagnostics.Stopwatch.StartNew();
var ram = new long[rom.Count];
rom.CopyTo(ram, 0);
ram[1] = 12;
ram[2] = 2;
IntcodeComputer computer = new IntcodeComputer(ram);
long output = computer.Run();
System.Diagnostics.Debug.WriteLine($"Part 1: {output}");
sw.Stop();
System.Diagnostics.Debug.WriteLine(sw.Elapsed);
}
public static int Run(IEnumerable <int> initialPositions)
{
var computer = new IntcodeComputer(initialPositions);
for (var noun = 0; noun < 100; noun++)
{
for (var verb = 0; verb < 100; verb++)
{
computer.SetInitialNounAndVerb(noun, verb);
computer.Run();
if (computer.PeekResult() == 19690720)
{
return(100 * noun + verb);
}
computer.Reset();
}
}
throw new IndexOutOfRangeException("ran out of nouns and verbs to try");
}
private static void Part2()
{
var sw = System.Diagnostics.Stopwatch.StartNew();
var ram = new long[rom.Count];
for (int i = 0; i < 99; i++)
{
for (int j = 0; j < 99; j++)
{
rom.CopyTo(ram, 0);
ram[1] = i;
ram[2] = j;
IntcodeComputer computer = new IntcodeComputer(ram);
long output = computer.Run();
if (output == 19690720)
{
System.Diagnostics.Debug.WriteLine($"Part 2: {100 * i + j}");
sw.Stop();
System.Diagnostics.Debug.WriteLine(sw.Elapsed);
return;
}
}
}
}