48 lines
1.3 KiB
Ruby
48 lines
1.3 KiB
Ruby
#!/bin/env ruby
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require 'pry'
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# Part 1
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def bingo?(line)
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line.select { _1.nil? }.count == line.count
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end
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bingo = File.readlines('./input')
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draws = bingo[0].strip.split(',').map(&:to_i)
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cards = bingo[1..-1].reject { _1 == "\n" }.map(&:strip)
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.each_slice(5)
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.map { |card| card.map { _1.split(' ').map(&:to_i) } }
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winner = nil
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last_draw = 0
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catch :bingo do
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draws.each do |draw|
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last_draw = draw
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cards.map! { _1.map! { |row| row.map! { |number| number == draw ? nil : number } } }
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cards.each do |card|
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card.each { |line| winner = card if bingo?(line) }
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card.transpose.each { |line| winner = card if bingo?(line) }
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throw :bingo unless winner.nil?
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end
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end
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end
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score = winner.flatten.reject(&:nil?).sum * last_draw
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puts "Winning Board Score: #{score}"
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# Part 2
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catch :last_winner do
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draws.each do |draw|
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last_draw = draw
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winner = nil
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cards.map! { _1.map! { |row| row.map! { |number| number == draw ? nil : number } } }
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cards.each do |card|
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card.each { |line| winner = card if bingo?(line) }
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card.transpose.each { |line| winner = card if bingo?(line) }
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cards.delete(winner) unless winner.nil?
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end
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throw :last_winner if cards.count == 0
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end
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end
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score = winner.flatten.reject(&:nil?).sum * last_draw
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puts "Last Winning Board Score: #{score}"
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