Error

a.py

1 0 0 0 0
IMPOSSIBLE
1 1 0 0
1 1 0 1
0 0 0 0
---------------------------------------------------------------------------
_RemoteTraceback                          Traceback (most recent call last)
_RemoteTraceback: 
"""
Traceback (most recent call last):
  File "/Users/wseobseo/anaconda3/lib/python3.7/concurrent/futures/process.py", line 232, in _process_worker
    r = call_item.fn(*call_item.args, **call_item.kwargs)
  File "/Users/wseobseo/anaconda3/lib/python3.7/concurrent/futures/process.py", line 191, in _process_chunk
    return [fn(*args) for args in chunk]
  File "/Users/wseobseo/anaconda3/lib/python3.7/concurrent/futures/process.py", line 191, in <listcomp>
    return [fn(*args) for args in chunk]
  File "<ipython-input-4-0102cbd00141>", line 112, in execute
    color_set = get_color_set(case.num_colors, case.customers, is_satisfied)
  File "<ipython-input-4-0102cbd00141>", line 77, in get_color_set
    color_set[num_c] = ColorType.MATTE
  File "<ipython-input-4-0102cbd00141>", line 48, in __setitem__
    raise IndexError(f"color_code starts from 1 not 0: given {color_code}")
IndexError: color_code starts from 1 not 0: given -1
"""

The above exception was the direct cause of the following exception:

IndexError                                Traceback (most recent call last)
<ipython-input-5-f6ada63ea063> in <module>()
      1 cases = read_cases('input.txt')
      2 with futures.ProcessPoolExecutor() as executor:
----> 3     for case, verdict in zip(cases, executor.map(execute, cases)):
      4         print(f"{verdict}")

~/anaconda3/lib/python3.7/concurrent/futures/process.py in _chain_from_iterable_of_lists(iterable)
    474     careful not to keep references to yielded objects.
    475     """
--> 476     for element in iterable:
    477         element.reverse()
    478         while element:

~/anaconda3/lib/python3.7/concurrent/futures/_base.py in result_iterator()
    584                     # Careful not to keep a reference to the popped future
    585                     if timeout is None:
--> 586                         yield fs.pop().result()
    587                     else:
    588                         yield fs.pop().result(end_time - time.time())

~/anaconda3/lib/python3.7/concurrent/futures/_base.py in result(self, timeout)
    430                 raise CancelledError()
    431             elif self._state == FINISHED:
--> 432                 return self.__get_result()
    433             else:
    434                 raise TimeoutError()

~/anaconda3/lib/python3.7/concurrent/futures/_base.py in __get_result(self)
    382     def __get_result(self):
    383         if self._exception:
--> 384             raise self._exception
    385         else:
    386             return self._result

IndexError: color_code starts from 1 not 0: given -1