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advent-of-code/2019/day01/part1.rb

10 lines
204 B
Ruby

# frozen_string_literal: true
answer = 0
File.open(File.join(__dir__, 'input')) do |file|
file.readlines.each do |line|
mass = line.to_i
answer += (mass / 3).truncate - 2
end
end
puts answer