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# -*- coding: utf-8 -*-
from abc import ABC
from typing import Iterator
from aoc import BaseAssignment
I = tuple[list[int], list[int]]
T = int
class Assignment(BaseAssignment, ABC):
def winning_numbers(self, winning: list[int], owned: list[int]) -> set[int]:
return set(winning) & set(owned)
def parse_numbers(self, numbers: str) -> list[int]:
return [int(num) for num in numbers.split(" ") if num != ""]
def parse_item(self, item: str) -> I:
_, numbers = item.split(": ")
winning, owned = numbers.split(" | ")
return self.parse_numbers(winning), self.parse_numbers(owned)
class AssignmentOne(Assignment):
example_result = 13
def points(self, winning: list[int], owned: list[int]) -> int:
overlap = len(self.winning_numbers(winning, owned))
return overlap if overlap < 2 else 2 ** (overlap - 1)
def run(self, input: Iterator[I]) -> T:
return sum(self.points(winning, owned) for winning, owned in input)
class AssignmentTwo(Assignment):
example_result = 30
def run(self, input: Iterator[I]) -> T:
cards = list(input)
count = {index: 1 for index, _ in enumerate(cards)}
for index, (winning, owned) in enumerate(cards):
for i in range(len(self.winning_numbers(winning, owned))):
winning_index = index + i + 1
if winning_index in count:
count[winning_index] += count[index]
return sum(count.values())
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