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EricDykstra/advent_of_code_day_24.rb

Created December 24, 2015 05:31
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advent_of_code_day_24.rb
# uncomment for part 1 num_groups = 3
# uncomment for part 2 num_groups = 4
start = 1
until answer = array.combination(start).select{|c| c.inject(:+) == (array.inject(:+) / num_groups)}.sort_by{|c| c.inject(:*)}.first
start += 1
end
p answer.inject(:*)
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