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jhawthorn/aoc_day_18_part2.rb

Created December 18, 2020 05:29
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aoc_day_18_part2.rb
class Integer
alias_method :add, :+
alias_method :+, :*
alias_method :*, :add
end
p File.readlines("data/18.txt").map {
|l| eval(l.tr("+*", "*+"))
}.sum
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