197 lines
6.7 KiB
Python
197 lines
6.7 KiB
Python
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#!/usr/bin/env python
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import itertools
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import sys
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from copy import deepcopy
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from dataclasses import dataclass, field
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from enum import IntEnum
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from typing import Callable, List, NamedTuple
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class ParameterMode(IntEnum):
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POSITION = 0 # Acts on address
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IMMEDIATE = 1 # Acts on the immediate value
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class Instruction(NamedTuple):
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address: int # The address of the instruction, for convenience
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op: int # The opcode
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p1_mode: ParameterMode # Which mode is the first parameter in
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p2_mode: ParameterMode # Which mode is the second parameter in
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p3_mode: ParameterMode # Which mode is the third parameter in
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def lookup_ops(index: int, memory: List[int]) -> Instruction:
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digits = list(map(int, str(memory[index])))
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a, b, c, d, e = [0] * (5 - len(digits)) + digits # Pad with default values
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return Instruction(
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address=index,
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op=d * 10 + e,
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p1_mode=ParameterMode(c),
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p2_mode=ParameterMode(b),
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p3_mode=ParameterMode(a),
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)
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class InputInterrupt(Exception):
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pass
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class OutputInterrupt(Exception):
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pass
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@dataclass
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class Computer:
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memory: List[int] # Memory space
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rip: int = 0 # Instruction pointer
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input_list: List[int] = field(default_factory=list)
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output_list: List[int] = field(default_factory=list)
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is_halted: bool = field(default=False, init=False)
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def run(self) -> None:
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while not self.is_halted:
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self.run_single()
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def run_single(self): # Returns True when halted
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instr = lookup_ops(self.rip, self.memory)
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if instr.op == 99: # Halt
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self.is_halted = True
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elif instr.op == 1: # Sum
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self._do_addition(instr)
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elif instr.op == 2: # Multiplication
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self._do_multiplication(instr)
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elif instr.op == 3: # Load from input
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self._do_input(instr)
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elif instr.op == 4: # Store to output
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self._do_output(instr)
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elif instr.op == 5: # Jump if true
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self._do_jump_if_true(instr)
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elif instr.op == 6: # Jump if false
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self._do_jump_if_false(instr)
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elif instr.op == 7: # Less than
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self._do_less_than(instr)
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elif instr.op == 8: # Equal to
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self._do_equal_to(instr)
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else:
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assert False # Sanity check
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def _get_value(self, mode: ParameterMode, val: int) -> int:
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if mode == ParameterMode.POSITION:
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return self.memory[val]
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assert mode == ParameterMode.IMMEDIATE # Sanity check
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return val
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def _do_addition(self, instr: Instruction) -> None:
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lhs = self._get_value(instr.p1_mode, self.memory[instr.address + 1])
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rhs = self._get_value(instr.p2_mode, self.memory[instr.address + 2])
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dest = self.memory[instr.address + 3]
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assert instr.p3_mode == ParameterMode.POSITION # Sanity check
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self.memory[dest] = lhs + rhs
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self.rip += 4 # Length of the instruction
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def _do_multiplication(self, instr: Instruction) -> None:
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lhs = self._get_value(instr.p1_mode, self.memory[instr.address + 1])
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rhs = self._get_value(instr.p2_mode, self.memory[instr.address + 2])
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dest = self.memory[instr.address + 3]
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assert instr.p3_mode == ParameterMode.POSITION # Sanity check
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self.memory[dest] = lhs * rhs
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self.rip += 4 # Length of the instruction
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def _do_input(self, instr: Instruction) -> None:
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if len(self.input_list) == 0:
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raise InputInterrupt # No input, halt until an input is provided
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value = int(self.input_list.pop(0))
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param = self.memory[instr.address + 1]
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assert instr.p1_mode == ParameterMode.POSITION # Sanity check
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self.memory[param] = value
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self.rip += 2 # Length of the instruction
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def _do_output(self, instr: Instruction) -> None:
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value = self._get_value(instr.p1_mode, self.memory[instr.address + 1])
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self.output_list.append(value)
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self.rip += 2 # Length of the instruction
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raise OutputInterrupt # Alert that we got an output to give
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def _do_jump_if_true(self, instr: Instruction) -> None:
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cond = self._get_value(instr.p1_mode, self.memory[instr.address + 1])
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value = self._get_value(instr.p2_mode, self.memory[instr.address + 2])
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if cond != 0:
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self.rip = value
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else:
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self.rip += 3 # Length of the instruction
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def _do_jump_if_false(self, instr: Instruction) -> None:
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cond = self._get_value(instr.p1_mode, self.memory[instr.address + 1])
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value = self._get_value(instr.p2_mode, self.memory[instr.address + 2])
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if cond == 0:
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self.rip = value
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else:
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self.rip += 3 # Length of the instruction
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def _do_less_than(self, instr: Instruction) -> None:
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lhs = self._get_value(instr.p1_mode, self.memory[instr.address + 1])
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rhs = self._get_value(instr.p2_mode, self.memory[instr.address + 2])
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dest = self.memory[instr.address + 3]
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assert instr.p3_mode == ParameterMode.POSITION # Sanity check
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self.memory[dest] = 1 if lhs < rhs else 0
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self.rip += 4 # Length of the instruction
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def _do_equal_to(self, instr: Instruction) -> None:
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lhs = self._get_value(instr.p1_mode, self.memory[instr.address + 1])
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rhs = self._get_value(instr.p2_mode, self.memory[instr.address + 2])
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dest = self.memory[instr.address + 3]
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assert instr.p3_mode == ParameterMode.POSITION # Sanity check
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self.memory[dest] = 1 if lhs == rhs else 0
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self.rip += 4 # Length of the instruction
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def main() -> None:
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memory = [int(n) for n in sys.stdin.read().split(",")]
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max = 0
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ans = tuple(-1 for __ in range(5))
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for perm in itertools.permutations(range(5, 10)):
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amps = [Computer(deepcopy(memory), input_list=[phase]) for phase in perm]
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amp1 = amps[0] # Keep track of this guy for the output solution
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amp1.input_list.append(0) # Initial input
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while not all(amp.is_halted for amp in amps):
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# Put a non halted comuter to the front
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while amps[0].is_halted:
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amps.append(amps.pop(0))
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# Run it until exhaustion or input/output interrupt
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try:
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amps[0].run()
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except InputInterrupt:
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amps.append(amps.pop(0))
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except OutputInterrupt:
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amps[1].input_list.append(amps[0].output_list.pop())
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res = amp1.input_list.pop(0) # Amplifier 5 output to amplifier 1 at the end
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if res > max:
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max = res
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ans = perm
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print(f"Max: {max}, res: {ans}")
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print(f"Final one: {max}, with {ans}")
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if __name__ == "__main__":
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main()
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