public override string SolvePartOne()
{
GameProgram gameProgram = new GameProgram(_instructions);
gameProgram.Run();
return(gameProgram.Accumulator.ToString());
}
public override string SolvePartTwo()
{
int swapIndex = 0;
List <int> swapIndices = new List <int>();
while (swapIndex < _instructions.Count)
{
swapIndex = _instructions.FindIndex(swapIndex, pInstruction =>
pInstruction.Op == "nop" && pInstruction.Arg != 0 ||
pInstruction.Op == "jmp");
if (swapIndex == -1)
{
break;
}
swapIndices.Add(swapIndex);
swapIndex++;
}
// PrintInstructions(_instructions);
foreach (int index in swapIndices)
{
List <Instruction> instructions = CopyInstructions();
instructions[index] = instructions[index].Flip();
// PrintInstructions(instructions);
GameProgram gameProgram = new GameProgram(instructions);
gameProgram.Run();
if (!gameProgram.DidTerminate())
{
continue;
}
return(gameProgram.Accumulator.ToString());
}
return("FAILED");
}