diff --git a/2019/d11/ex2/ex2.py b/2019/d11/ex2/ex2.py new file mode 100755 index 0000000..9109aa1 --- /dev/null +++ b/2019/d11/ex2/ex2.py @@ -0,0 +1,253 @@ +#!/usr/bin/env python + +import sys +from dataclasses import dataclass, field +from enum import IntEnum +from typing import Dict, List, NamedTuple + + +class ParameterMode(IntEnum): + POSITION = 0 # Acts on address + IMMEDIATE = 1 # Acts on the immediate value + RELATIVE = 2 # Acts on offset to relative base + + +class Instruction(NamedTuple): + address: int # The address of the instruction, for convenience + op: int # The opcode + p1_mode: ParameterMode # Which mode is the first parameter in + p2_mode: ParameterMode # Which mode is the second parameter in + p3_mode: ParameterMode # Which mode is the third parameter in + + +def lookup_ops(index: int, memory: List[int]) -> Instruction: + digits = list(map(int, str(memory[index]))) + a, b, c, d, e = [0] * (5 - len(digits)) + digits # Pad with default values + return Instruction( + address=index, + op=d * 10 + e, + p1_mode=ParameterMode(c), + p2_mode=ParameterMode(b), + p3_mode=ParameterMode(a), + ) + + +class InputInterrupt(Exception): + pass + + +class OutputInterrupt(Exception): + pass + + +@dataclass +class Computer: + memory: List[int] # Memory space + rip: int = 0 # Instruction pointer + input_list: List[int] = field(default_factory=list) + output_list: List[int] = field(default_factory=list) + is_halted: bool = field(default=False, init=False) + relative_base: int = field(default=0, init=False) + + def run(self) -> None: + while not self.is_halted: + self.run_single() + + def run_no_output_interrupt(self) -> None: + while not self.is_halted: + try: + self.run_single() + except OutputInterrupt: + continue + + def run_single(self): # Returns True when halted + instr = lookup_ops(self.rip, self.memory) + if instr.op == 99: # Halt + self.is_halted = True + elif instr.op == 1: # Sum + self._do_addition(instr) + elif instr.op == 2: # Multiplication + self._do_multiplication(instr) + elif instr.op == 3: # Load from input + self._do_input(instr) + elif instr.op == 4: # Store to output + self._do_output(instr) + elif instr.op == 5: # Jump if true + self._do_jump_if_true(instr) + elif instr.op == 6: # Jump if false + self._do_jump_if_false(instr) + elif instr.op == 7: # Less than + self._do_less_than(instr) + elif instr.op == 8: # Equal to + self._do_equal_to(instr) + elif instr.op == 9: # Change relative base + self._do_change_relative_base(instr) + else: + assert False # Sanity check + + def _fill_to_addres(self, address: int) -> None: + values = address - len(self.memory) + 1 + if values <= 0: + return + for __ in range(values): + self.memory.append(0) + + def _get_value(self, mode: ParameterMode, val: int) -> int: + if mode == ParameterMode.POSITION: + assert 0 <= val # Sanity check + self._fill_to_addres(val) + return self.memory[val] + elif mode == ParameterMode.RELATIVE: + val += self.relative_base + assert 0 <= val # Sanity check + self._fill_to_addres(val) + return self.memory[val] + assert mode == ParameterMode.IMMEDIATE # Sanity check + return val + + def _set_value(self, mode: ParameterMode, address: int, value: int) -> None: + if mode == ParameterMode.RELATIVE: + address += self.relative_base + else: + assert mode == ParameterMode.POSITION # Sanity check + + assert address >= 0 # Sanity check + self._fill_to_addres(address) + + self.memory[address] = value + + def _do_addition(self, instr: Instruction) -> None: + lhs = self._get_value(instr.p1_mode, self.memory[instr.address + 1]) + rhs = self._get_value(instr.p2_mode, self.memory[instr.address + 2]) + dest = self.memory[instr.address + 3] + + self._set_value(instr.p3_mode, dest, lhs + rhs) + + self.rip += 4 # Length of the instruction + + def _do_multiplication(self, instr: Instruction) -> None: + lhs = self._get_value(instr.p1_mode, self.memory[instr.address + 1]) + rhs = self._get_value(instr.p2_mode, self.memory[instr.address + 2]) + dest = self.memory[instr.address + 3] + + self._set_value(instr.p3_mode, dest, lhs * rhs) + + self.rip += 4 # Length of the instruction + + def _do_input(self, instr: Instruction) -> None: + if len(self.input_list) == 0: + raise InputInterrupt # No input, halt until an input is provided + + value = int(self.input_list.pop(0)) + param = self.memory[instr.address + 1] + + self._set_value(instr.p1_mode, param, value) + + self.rip += 2 # Length of the instruction + + def _do_output(self, instr: Instruction) -> None: + value = self._get_value(instr.p1_mode, self.memory[instr.address + 1]) + + self.output_list.append(value) + + self.rip += 2 # Length of the instruction + raise OutputInterrupt # Alert that we got an output to give + + def _do_jump_if_true(self, instr: Instruction) -> None: + cond = self._get_value(instr.p1_mode, self.memory[instr.address + 1]) + value = self._get_value(instr.p2_mode, self.memory[instr.address + 2]) + + if cond != 0: + self.rip = value + else: + self.rip += 3 # Length of the instruction + + def _do_jump_if_false(self, instr: Instruction) -> None: + cond = self._get_value(instr.p1_mode, self.memory[instr.address + 1]) + value = self._get_value(instr.p2_mode, self.memory[instr.address + 2]) + + if cond == 0: + self.rip = value + else: + self.rip += 3 # Length of the instruction + + def _do_less_than(self, instr: Instruction) -> None: + lhs = self._get_value(instr.p1_mode, self.memory[instr.address + 1]) + rhs = self._get_value(instr.p2_mode, self.memory[instr.address + 2]) + dest = self.memory[instr.address + 3] + + self._set_value(instr.p3_mode, dest, 1 if lhs < rhs else 0) + + self.rip += 4 # Length of the instruction + + def _do_equal_to(self, instr: Instruction) -> None: + lhs = self._get_value(instr.p1_mode, self.memory[instr.address + 1]) + rhs = self._get_value(instr.p2_mode, self.memory[instr.address + 2]) + dest = self.memory[instr.address + 3] + + self._set_value(instr.p3_mode, dest, 1 if lhs == rhs else 0) + + self.rip += 4 # Length of the instruction + + def _do_change_relative_base(self, instr: Instruction) -> None: + value = self._get_value(instr.p1_mode, self.memory[instr.address + 1]) + + self.relative_base += value + self.rip += 2 # Length of the instruction + + +class Position(NamedTuple): + x: int + y: int + + +# Up, Right, Down, Left offsets +offsets = [Position(1, 0), Position(0, 1), Position(-1, 0), Position(0, -1)] + + +class Color(IntEnum): + BLACK = 0 + WHITE = 1 + + +def main() -> None: + memory = [int(n) for n in sys.stdin.read().split(",")] + painter = Computer(memory) + pos = Position(0, 0) + orientation = 0 + painted: Dict[Position, Color] = {pos: Color.WHITE} + + has_painted = False + while not painter.is_halted: + try: + painter.run() + except InputInterrupt: + painter.input_list.append(int(painted.get(pos, Color.BLACK))) + except OutputInterrupt: + if has_painted: + orientation += 1 if painter.output_list.pop(0) == 1 else -1 + if orientation < 0: + orientation += len(offsets) + else: + orientation = orientation % len(offsets) + offset = offsets[orientation] + pos = Position(pos.x + offset.x, pos.y + offset.y) + else: + painted[pos] = Color(painter.output_list.pop(0)) + has_painted = not has_painted + + maxx, maxy = max(p.x for p in painted), max(p.y for p in painted) + minx, miny = min(p.x for p in painted), min(p.y for p in painted) + + ans: List[List[str]] = [] + for x in range(minx, maxx + 1): + ans.append([]) + for y in range(miny, maxy + 1): + color = painted.get(Position(x, y), Color.BLACK) + ans[-1].append("█" if color == Color.WHITE else " ") + lines = ["".join(l) for l in ans] + print("\n".join(reversed(lines))) # Seems like my coordinates are reversed + + +if __name__ == "__main__": + main()