public int TryToFixVmAndReturnCorrectAccumulator()
{
if (IsInfinite())
{
for (var i = 0; i < _instructions.Length; i++)
{
var arr = new Instruction[_instructions.Length];
_instructions.CopyTo(arr, 0);
arr[i] = _instructions[i].CommandType switch
{
Instruction.Command.Nop => new Instruction(Instruction.Command.Jmp, _instructions[i].Value),
Instruction.Command.Jmp => new Instruction(Instruction.Command.Nop, _instructions[i].Value),
Instruction.Command.Acc => null,
_ => throw new ArgumentOutOfRangeException()
};
if (arr[i] == null)
{
continue;
}
var vm = new Vm(arr);
if (!vm.IsInfinite())
{
vm.CleanUp();
return(vm.ReturnAccumulator());
}
}
throw new SystemException();
}
else
{
return(ReturnAccumulator());
}
}
static void Main(string[] args)
{
var vm = new Vm(File.ReadLines("input.txt").Select(Instruction.Parse));
Console.WriteLine(vm.ReturnAccumulator());
vm.CleanUp();
Console.WriteLine(vm.TryToFixVmAndReturnCorrectAccumulator());
}