From aee6beea2946019a6bf93daa637bcc74dc55f590 Mon Sep 17 00:00:00 2001 From: Gabriel Augendre Date: Sat, 7 Mar 2020 11:43:30 +0100 Subject: [PATCH] Solve day 9 part 1 --- 2019/day09-intcode.py | 190 ++++++++++++++++++++++++++++++++++++++++++ 2019/inputs/day09 | 1 + 2019/inputs/day09-ex1 | 1 + 2019/inputs/day09-ex2 | 1 + 2019/inputs/day09-ex3 | 1 + 5 files changed, 194 insertions(+) create mode 100644 2019/day09-intcode.py create mode 100644 2019/inputs/day09 create mode 100644 2019/inputs/day09-ex1 create mode 100644 2019/inputs/day09-ex2 create mode 100644 2019/inputs/day09-ex3 diff --git a/2019/day09-intcode.py b/2019/day09-intcode.py new file mode 100644 index 0000000..cd48d71 --- /dev/null +++ b/2019/day09-intcode.py @@ -0,0 +1,190 @@ +import itertools +from collections import defaultdict +from typing import List, Union + +RELATIVE_MODE = 2 +POSITION_MODE = 0 +VALUE_MODE = 1 +NUMBER_OF_PARAMS_MAP = { + 1: 3, + 2: 3, + 3: 1, + 4: 1, + 5: 2, + 6: 2, + 7: 3, + 8: 3, + 9: 1, +} + +LAST_IS_RESULT_MAP = { + 1: True, + 2: True, + 3: True, + 4: False, + 5: False, + 6: False, + 7: True, + 8: True, + 9: False, +} + + +class IntcodeOutput(Exception): + def __init__(self, value): + self.value = value + + +class Computer: + def __init__(self, initial_program: List[int], inputs: List[int] = None): + self.program = defaultdict(int, enumerate(initial_program)) + if inputs is None: + inputs = [] + self.inputs = inputs.copy() # type: List[int] + self.pointer = 0 + self.pointer_moved = False + self.relative_base = 0 + + def get_value(self, args, param_modes, index): + if param_modes[index] == RELATIVE_MODE: + return self.program[self.relative_base + args[index]] + if param_modes[index] == POSITION_MODE: + return self.program[args[index]] + return args[index] + + def parse_args(self, raw_args, param_modes, code): + args = [] + last_is_result = LAST_IS_RESULT_MAP[code] + limit = -1 if last_is_result else None + for i, arg in enumerate(raw_args[:limit]): + args.append(self.get_value(raw_args, param_modes, i)) + if last_is_result: + if param_modes[-1] == RELATIVE_MODE: + args.append(raw_args[-1] + self.relative_base) + else: + args.append(raw_args[-1]) + return args + + def _move_pointer(self, position): + self.pointer = position + self.pointer_moved = True + + def _update_pointer(self, code): + offset = self.get_offset(code) + if not self.pointer_moved: + self.pointer += offset + self.pointer_moved = False + + def compute(self, additional_inputs: List[int] = None) -> int: + if additional_inputs is None: + additional_inputs = [] + self.inputs.extend(additional_inputs) + + while self.pointer < len(self.program): + code = self.get_code() + try: + self.handle_operation(code) + except IntcodeOutput as e: + print(e.value) + finally: + self._update_pointer(code) + + def get_params(self, code): + offset = self.get_offset(code) + param_modes = self.get_instruction()[:-2] + param_modes = param_modes.zfill(offset - 1) + param_modes = list(map(int, reversed(param_modes))) + raw_params = [] + for i in range(1, offset): + raw_params.append(self.program[self.pointer + i]) + + params = self.parse_args(raw_params, param_modes, code) + return params + + def get_offset(self, code): + number_of_params = NUMBER_OF_PARAMS_MAP[code] + return number_of_params + 1 + + def get_code(self): + instruction = self.get_instruction() + code = int(instruction[-2:]) + if code == 99: + raise StopIteration + return code + + def get_instruction(self): + instruction = str(self.program[self.pointer]) + return instruction + + def handle_operation(self, code): + params = self.get_params(code) + if code == 1: + self.handle_addition(params) + elif code == 2: + self.handle_multiplication(params) + elif code == 3: + self.handle_input(params) + elif code == 4: + self.handle_output(params) + elif code == 5: + self.handle_jump_if_true(params) + elif code == 6: + self.handle_jump_if_false(params) + elif code == 7: + self.handle_less_than(params) + elif code == 8: + self.handle_equals(params) + elif code == 9: + self.handle_adjust_relative_base(params) + else: + raise ValueError(f"Something bad happened, code={code}") + + def handle_addition(self, params): + self.program[params[2]] = params[0] + params[1] + + def handle_multiplication(self, params): + self.program[params[2]] = params[0] * params[1] + + def handle_input(self, params): + self.program[params[0]] = int(self.inputs.pop(0)) + + def handle_output(self, params): + raise IntcodeOutput(params[0]) + + def handle_jump_if_true(self, params): + if params[0] != 0: + self._move_pointer(params[1]) + + def handle_jump_if_false(self, params): + if params[0] == 0: + self._move_pointer(params[1]) + + def handle_equals(self, params): + if params[0] == params[1]: + self.program[params[2]] = 1 + else: + self.program[params[2]] = 0 + + def handle_less_than(self, params): + if params[0] < params[1]: + self.program[params[2]] = 1 + else: + self.program[params[2]] = 0 + + def handle_adjust_relative_base(self, params): + self.relative_base += params[0] + + +def main(): + with open("inputs/day09") as input_file: + original_program = list(map(int, input_file.read().split(","))) + computer = Computer(original_program) + try: + result = computer.compute([1]) + print(result) + except StopIteration: + pass + + +if __name__ == "__main__": + main() diff --git a/2019/inputs/day09 b/2019/inputs/day09 new file mode 100644 index 0000000..3f3eb4f --- /dev/null +++ b/2019/inputs/day09 @@ -0,0 +1 @@ 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\ No newline at end of file diff --git a/2019/inputs/day09-ex1 b/2019/inputs/day09-ex1 new file mode 100644 index 0000000..521db73 --- /dev/null +++ b/2019/inputs/day09-ex1 @@ -0,0 +1 @@ +109,1,204,-1,1001,100,1,100,1008,100,16,101,1006,101,0,99 \ No newline at end of file diff --git a/2019/inputs/day09-ex2 b/2019/inputs/day09-ex2 new file mode 100644 index 0000000..ad18566 --- /dev/null +++ b/2019/inputs/day09-ex2 @@ -0,0 +1 @@ +1102,34915192,34915192,7,4,7,99,0 \ No newline at end of file diff --git a/2019/inputs/day09-ex3 b/2019/inputs/day09-ex3 new file mode 100644 index 0000000..78bddee --- /dev/null +++ b/2019/inputs/day09-ex3 @@ -0,0 +1 @@ +104,1125899906842624,99 \ No newline at end of file