70 lines
1.3 KiB
Ruby
70 lines
1.3 KiB
Ruby
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#!/usr/bin/env ruby
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require_relative '../common'
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class Day02 < Day
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WIN = 6
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DRAW = 3
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LOSE = 0
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class MovePart1
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def self.game
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{
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"X" => new("A", "C", 1),
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"Y" => new("B", "A", 2),
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"Z" => new("C", "B", 3)
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}
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end
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def self.score(input)
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game[input[2]].score(input[0])
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end
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def initialize(opponent_letter, beat_letter, score)
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@opponent_letter = opponent_letter
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@beat_letter = beat_letter
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@score = score
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end
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def score(played_letter)
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match_result = if @opponent_letter == played_letter
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Day02::DRAW
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elsif played_letter == @beat_letter
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Day02::WIN
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else
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Day02::LOSE
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end
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match_result + @score
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end
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end
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class MovePart2
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SCORES = {
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"A" => 1,
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"B" => 2,
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"C" => 3
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}
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def self.score(input)
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if input[2] == "X"
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Day02::LOSE + SCORES[SCORES.keys[SCORES.keys.index(input[0]) - 1]]
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elsif input[2] == "Y"
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Day02::DRAW + SCORES[input[0]]
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else
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Day02::WIN + SCORES[SCORES.keys[(SCORES.keys.index(input[0]) + 1) % SCORES.keys.size]]
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end
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end
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end
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def part1
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stdin.map { |i| MovePart1.score i }.sum
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end
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def part2
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stdin.map { |i| MovePart2.score i }.sum
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end
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end
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Day02.run
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