public override string Part1(string input)
{
var lines = input.Lines()
.ToArray();
var bootcode = new Bootcode(lines);
bootcode.Execute();
return(bootcode.Accumulator.ToString());
}
public int Execute()
{
var bootcode = new Bootcode(_instructions);
if (bootcode.Execute())
{
return(bootcode.Accumulator);
}
for (var i = 0; i < _instructions.Length; ++i)
{
var line = _instructions[i];
if (line.StartsWith("jmp") || line.StartsWith("nop"))
{
var newInstructions = new string[_instructions.Length];
_instructions.CopyTo(newInstructions, 0);
if (line.StartsWith("jmp"))
{
newInstructions[i] = newInstructions[i].Replace("jmp", "nop");
}
else if (line.StartsWith("nop"))
{
newInstructions[i] = newInstructions[i].Replace("nop", "jmp");
}
var newBootcode = new Bootcode(newInstructions);
if (newBootcode.Execute())
{
return(newBootcode.Accumulator);
}
}
}
return(0);
}
