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