public int WallFollower(AsciiComputer cpu)
{
//cpu.EchoInput = true;
//cpu.EchoOutput = true;
var gameOutput = cpu.Run();
var facing = Directions.north;
bool securityVisited = false;
while (true)
{
TakeAllItems(cpu, gameOutput);
if (gameOutput.Contains("Security Checkpoint"))
{
if (!securityVisited)
{
// first time here, turn around to get all items
facing = (Directions)(((int)facing + 2) % 4);
securityVisited = true;
}
else
{
return(Force(cpu));
}
}
else
{
var doors = GetDoors(gameOutput);
facing = TakeLeft(facing, doors);
}
gameOutput = cpu.Run(facing.ToString());
//Console.ReadKey(true);
}
}
public int GetAnswer1(long[] program)
{
var cpu = new IntCodeComputer(program);
var asciiComputer = new AsciiComputer(cpu);
return(WallFollower(asciiComputer));
}
private bool ForceEntry(AsciiComputer cpu, ImmutableArray <string> inventory, ref int code)
{
// simple brute force try all combinations
foreach (var item in inventory)
{
cpu.Run("drop " + item);
var res = TryGetCode(cpu, ref code);
if (res == 0)
{
return(true);
}
if (res > 0)
{
if (ForceEntry(cpu, inventory.Remove(item), ref code))
{
return(true);
}
}
cpu.Run("take " + item);
}
code = 0;
return(false);
}
private int Force(AsciiComputer cpu)
{
var all = GetInventory(cpu);
int code = 0;
ForceEntry(cpu, all.ToImmutableArray(), ref code);
return(code);
}
public void TakeAllItems(AsciiComputer cpu, string gameOutput)
{
var itemsHere = GetList(gameOutput, "Items here:");
foreach (var item in itemsHere.Except(UnsafeItems))
{
cpu.Run("take " + item);
}
}
private static long GetHullDamage(int[] input, string[] script)
{
var cpu = new IntCodeComputer(input);
var asc = new AsciiComputer(cpu);
foreach (var line in script)
{
var r = asc.Run(line.Trim());
//Console.Write(r);
}
//Console.WriteLine(cpu.ToString());
return(asc.ResultCode);
}
public void Repl(long[] program)
{
while (true)
{
Console.WriteLine("****** Start New Game! ******");
var cpu = new IntCodeComputer(program);
var asciiComputer = new AsciiComputer(cpu);
Console.Write(asciiComputer.Run());
while (!cpu.Finished)
{
var input = Console.ReadLine();
if (input == "exit")
{
return;
}
Console.Write(asciiComputer.Run(input));
}
}
}
private int TryGetCode(AsciiComputer cpu, ref int code)
{
var result = cpu.Run("south");
if (!result.Contains("Alert!"))
{
code = int.Parse(Regex.Match(result, "\\d+").Value);
return(0);
}
if (result.Contains("lighter"))
{
return(1);
}
if (result.Contains("heavier"))
{
return(-1);
}
throw new InvalidOperationException("unexpected result");
}
private string[] GetInventory(AsciiComputer cpu)
{
var result = cpu.Run("inv");
return(GetList(result, "Items in your inventory:"));
}
