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#!/bin/env ruby
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#Find the two entries that sum to 2020; what do you get if you multiply them together?
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numbers = File.readlines(./input)
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numbers.each do |num1|
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numbers.each do |num2|
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sum = num1 + num2
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puts num1 + '+' num2 '=' sum
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if sum == 2020
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puts num1 * num2
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exit
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end
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end
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end |