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Solve day 7 part 2
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parent
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1 changed files with 126 additions and 78 deletions
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@ -24,111 +24,159 @@ LAST_IS_RESULT_MAP = {
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}
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class IntcodeOutput(Exception):
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def __init__(self, value):
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self.value = value
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class Computer:
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@staticmethod
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def get_value(program, args, param_modes, index):
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def get_value(self, args, param_modes, index):
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if param_modes[index] == 0:
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return program[args[index]]
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return self.program[args[index]]
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return args[index]
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@staticmethod
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def parse_args(program, raw_args, param_modes, last_is_result=False):
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def parse_args(self, raw_args, param_modes, last_is_result=False):
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args = []
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limit = -1 if last_is_result else None
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for i, arg in enumerate(raw_args[:limit]):
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args.append(Computer.get_value(program, raw_args, param_modes, i))
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args.append(self.get_value(raw_args, param_modes, i))
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if last_is_result:
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args.append(raw_args[-1])
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return args
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def _move_pointer(self, position):
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self.pointer = position
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self.pointer_moved = True
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def _update_pointer(self):
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offset = self.get_offset()
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if not self.pointer_moved:
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self.pointer += offset
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self.pointer_moved = False
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def __init__(self, initial_program: List[int], inputs: List[int] = None):
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self.program = initial_program.copy() # type: List[int]
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self.inputs = inputs.copy() # type: List[int]
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self.pointer = 0
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self.pointer_moved = False
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def compute(self, inputs: List[int] = None) -> Union[int, None]:
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if inputs is None:
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inputs = []
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self.inputs.extend(inputs)
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def compute(self, additional_inputs: List[int] = None) -> int:
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if additional_inputs is None:
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additional_inputs = []
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self.inputs.extend(additional_inputs)
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pointer = 0
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while pointer < len(self.program):
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pointer_moved = False
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instruction = str(self.program[pointer])
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code = int(instruction[-2:])
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if code == 99:
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raise
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while self.pointer < len(self.program):
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try:
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self.handle_operation()
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except IntcodeOutput as e:
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return e.value
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finally:
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self._update_pointer()
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number_of_params = NUMBER_OF_PARAMS_MAP[code]
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offset = number_of_params + 1
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param_modes = instruction[:-2]
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param_modes = param_modes.zfill(number_of_params)
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def get_params(self):
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offset = self.get_offset()
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param_modes = self.get_instruction()[:-2]
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param_modes = param_modes.zfill(offset - 1)
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param_modes = list(map(int, reversed(param_modes)))
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raw_params = []
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for i in range(1, offset):
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raw_params.append(self.program[pointer + i])
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raw_params.append(self.program[self.pointer + i])
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code = self.get_code()
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last_is_result = LAST_IS_RESULT_MAP[code]
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params = self.parse_args(
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self.program, raw_params, param_modes, last_is_result
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)
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params = self.parse_args(raw_params, param_modes, last_is_result)
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return params
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def get_offset(self):
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code = self.get_code()
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number_of_params = NUMBER_OF_PARAMS_MAP[code]
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return number_of_params + 1
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def get_code(self):
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instruction = self.get_instruction()
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code = int(instruction[-2:])
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if code == 99:
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raise StopIteration
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return code
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def get_instruction(self):
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instruction = str(self.program[self.pointer])
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return instruction
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def handle_operation(self):
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code = self.get_code()
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params = self.get_params()
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if code == 1:
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# Addition
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self.program[params[2]] = params[0] + params[1]
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self.handle_addition(params)
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elif code == 2:
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# Multiplication
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self.program[params[2]] = params[0] * params[1]
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self.handle_multiplication(params)
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elif code == 3:
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# Input
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try:
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input_value = int(self.inputs.pop(0))
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except IndexError:
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input_value = int(input(f"Input for instruction {pointer}\n> "))
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self.program[params[0]] = input_value
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self.handle_input(params)
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elif code == 4:
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# Output
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return params[0]
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raise IntcodeOutput(params[0])
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elif code == 5:
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# Jump if true
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if params[0] != 0:
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pointer = params[1]
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pointer_moved = True
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self.handle_jump_if_true(params)
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elif code == 6:
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# Jump if false
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if params[0] == 0:
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pointer = params[1]
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pointer_moved = True
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self.handle_jump_if_false(params)
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elif code == 7:
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# Less than
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if params[0] < params[1]:
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self.program[params[2]] = 1
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else:
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self.program[params[2]] = 0
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self.handle_less_than(params)
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elif code == 8:
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# Equals
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self.handle_equals(params)
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else:
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raise ValueError(f"Something bad happened, code={code}")
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def handle_addition(self, params):
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self.program[params[2]] = params[0] + params[1]
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def handle_multiplication(self, params):
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self.program[params[2]] = params[0] * params[1]
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def handle_input(self, params):
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self.program[params[0]] = int(self.inputs.pop(0))
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def handle_jump_if_true(self, params):
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if params[0] != 0:
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self._move_pointer(params[1])
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def handle_jump_if_false(self, params):
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if params[0] == 0:
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self._move_pointer(params[1])
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def handle_equals(self, params):
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if params[0] == params[1]:
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self.program[params[2]] = 1
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else:
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self.program[params[2]] = 0
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def handle_less_than(self, params):
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if params[0] < params[1]:
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self.program[params[2]] = 1
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else:
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raise ValueError(f"Something bad happened, code={code}")
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if not pointer_moved:
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pointer += offset
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self.program[params[2]] = 0
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def main():
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with open("inputs/day07") as input_file:
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original_program = list(map(int, input_file.read().split(",")))
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values = set()
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for phase in itertools.permutations("01234"):
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amp1 = Computer(original_program, [int(phase[0])]).compute([0])
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amp2 = Computer(original_program, [int(phase[1])]).compute([amp1])
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amp3 = Computer(original_program, [int(phase[2])]).compute([amp2])
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amp4 = Computer(original_program, [int(phase[3])]).compute([amp3])
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amp5 = Computer(original_program, [int(phase[4])]).compute([amp4])
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values.add(amp5)
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for phase in itertools.permutations("56789"):
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amp1 = Computer(original_program, [int(phase[0])])
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amp2 = Computer(original_program, [int(phase[1])])
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amp3 = Computer(original_program, [int(phase[2])])
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amp4 = Computer(original_program, [int(phase[3])])
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amp5 = Computer(original_program, [int(phase[4])])
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signal = 0
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while True:
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try:
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signal = amp1.compute([signal])
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signal = amp2.compute([signal])
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signal = amp3.compute([signal])
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signal = amp4.compute([signal])
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signal = amp5.compute([signal])
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except StopIteration:
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values.add(signal)
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break
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print(max(values))
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