from typing import Iterator, List

from aoc import AssignmentBase


class Assignment(AssignmentBase):
    def parse_item(self, item: str) -> int:
        return int(item)

    def read_input(self, example = False) -> List[int]:
        return sorted(super().read_input(example))

class AssignmentOne(Assignment):
    def run(self, input: List) -> int:
        front_position = 0
        end_position = -1

        while True:
            sum = input[front_position] + input[end_position]

            if sum > 2020:
                end_position -= 1
            elif sum < 2020:
                front_position += 1
            else:
                break

        return input[front_position] * input[end_position]

class AssignmentTwo(Assignment):
    def run(self, input: List) -> int:
        for a in input:
            for b in input:
                for c in input:
                    if a + b + c == 2020:
                        return a * b * c