advent-of-code/2023/day2.rb

52 lines
928 B
Ruby
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2023-12-02 05:30:39 +00:00
LIMITS = {
"red" => 12,
"green" => 13,
"blue" => 14,
}
def possible(game)
game.all? do |draw|
draw.all? do |count, colour|
count <= LIMITS[colour]
end
end
end
def cubes_power(game)
max_seen = Hash.new(0)
game.each do |draw|
draw.each do |count, colour|
if count > max_seen[colour]
max_seen[colour] = count
end
end
end
LIMITS.keys.each.reduce(1) do |power, colour|
power * max_seen[colour]
end
end
possible_ids = []
powers = []
ARGF.each_line do |line|
game_id = nil
if line =~ /Game (\d+): (.+)$/
game_id = $1.to_i
game = $2.split("; ").map do |draw|
draw.split(", ").map do |balls|
count, colour = balls.split
[count.to_i, colour]
end
end
# p game
possible_ids << game_id if possible(game)
powers << cubes_power(game)
else
raise "unmatched line"
end
end
puts possible_ids.sum
puts powers.sum