def get_start_index(self, line: CellsLine, instructions: List[int],
instruction_index: int):
inverted_index = self.get_end_index(
line=line.inverse(),
instructions=instructions[::-1],
instruction_index=self.inverse_index(
index=instruction_index, list_length=len(instructions)))
return self.inverse_index(inverted_index, len(line))
def solve(self, line: CellsLine, instructions: List[int]) -> CellsLine:
line = self.solve_one_way(deepcopy(line), instructions)
if not self.one_way:
line = self.solve_one_way(line.inverse(),
instructions[::-1]).inverse()
return line
