public void Execute(AdventProgram program)
{
IP = 0;
AX = 0;
foreach (var cmd in program.Commands)
{
Execute(cmd);
}
}
static void Main(string[] args)
{
string inputPath = args[0];
StreamReader inputFile = new StreamReader(inputPath);
List <string> input = new List <string>();
string line;
while ((line = inputFile.ReadLine()) != null)
{
input.Add(line);
}
AdventProgram adv = new AdventProgram();
adv.LoadProgram(input);
HashSet <int> SeenInstructions = new HashSet <int>();
while (true)
{
int acc = adv.Accumulator;
bool notYetSeen = SeenInstructions.Add(adv.ExecuteOne().ID);
if (!notYetSeen)
{
Console.WriteLine($"Pt1: {acc}");
break;
}
}
// pt 2
// create permutations of input data
List <List <string> > possibleInstructionChanges = new List <List <string> >();
for (int i = 0; i < input.Count; i++)
{
List <string> tmp = new List <string>(input);
switch (input[i].Substring(0, 3))
{
case "nop":
possibleInstructionChanges.Add(tmp);
possibleInstructionChanges[^ 1][i] = tmp[i].Replace("nop", "jmp");
static void Main(string[] args)
{
var program = new AdventProgram();
program.Compile(File.ReadLines("input.txt"));
var vm = new AdventVM();
var executed = new HashSet <int>();
while (!executed.Contains(vm.IP))
{
executed.Add(vm.IP);
vm.Execute(program.Commands[vm.IP]);
}
Console.WriteLine("Answer #1:" + vm.AX);
vm.AX = 0;
vm.IP = 0;
executed.Clear();
var changeIndex = 0;
while (true)
{
executed.Add(vm.IP);
vm.Execute(program.Commands[vm.IP]);
if (vm.IP == program.Commands.Count)
{
break;
}
if (vm.IP > program.Commands.Count || executed.Contains(vm.IP))
{
program = new AdventProgram();
program.Compile(File.ReadLines("input.txt"));
while (true)
{
var txt = program.Commands[changeIndex].Text;
if (txt.StartsWith("nop") &&
int.Parse(txt.Split()[1]) != 0)
{
program.Commands[changeIndex] = program.CompileOne(txt.Replace("nop", "jmp"));
changeIndex++;
break;
}
else if (txt.StartsWith("jmp"))
{
program.Commands[changeIndex] = program.CompileOne(txt.Replace("jmp", "nop"));
changeIndex++;
break;
}
else
{
changeIndex++;
}
}
executed.Clear();
vm.IP = 0;
vm.AX = 0;
}
}
Console.WriteLine("Answer #2:" + vm.AX);
}
