16 lines
317 B
Crystal
16 lines
317 B
Crystal
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lines = File.read("day2").split("\n")
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lines.pop
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def count_changes(s1, s2)
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pairs = s1.chars.zip s2.chars
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total = 0
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pairs.each do |pair|
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total += 1 if pair[0] != pair[1]
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end
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return total
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end
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lines.product(lines).each do |pair|
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puts "#{pair[0]}, #{pair[1]}" if count_changes(pair[0], pair[1]) == 1
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end
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