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https://github.com/cupcakearmy/advent-of-code.git
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93 lines
1.7 KiB
Python
93 lines
1.7 KiB
Python
#!/usr/bin/env python
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from dataclasses import dataclass
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from enum import Enum
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from os.path import dirname, join
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# Day 02
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# Common
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def read_input(filename):
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data = join(dirname(__file__), '..', filename)
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with open(data) as f:
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return f.read().strip()
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test = read_input('test.txt')
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data = read_input('input.txt')
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MAPPING = {
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'A': 1,
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'B': 2,
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'C': 3,
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'X': 1, # Rock of loose
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'Y': 2, # Paper or draw
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'Z': 3, # Scissor or win
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}
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# Bitwise precalculated
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CASES = {
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1: (4, 3),
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2: (3, 5),
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3: (5, 4),
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}
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@dataclass
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class Match:
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opponent: int
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you: int
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def score(self):
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# Draw is 3 points
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if self.opponent == self.you:
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return self.you + 3
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won = CASES[self.you][0] == self.you + self.opponent
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return self.you + (6 if won else 0)
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@dataclass
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class Game:
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matches: list[Match]
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def play(self):
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return sum([match.score() for match in self.matches])
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# Part 2
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def cheat(self):
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for match in self.matches:
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# Draw
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if match.you == 2:
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match.you = match.opponent
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else:
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win = 0 if match.you == 1 else 1
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match.you = CASES[match.opponent][win] - match.opponent
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@staticmethod
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def parse(data: str):
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lines = [line.split(' ') for line in data.split('\n')]
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matches = [Match(MAPPING[line[0]], MAPPING[line[1]]) for line in lines]
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return Game(matches)
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# 1
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print('1.')
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game = Game.parse(test)
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print(game.play())
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game = Game.parse(data)
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print(game.play())
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# 2
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print('\n2.')
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game = Game.parse(test)
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game.cheat()
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print(game.play())
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game = Game.parse(data)
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game.cheat()
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print(game.play())
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