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  1. sum = 0
  2. 1.upto(666554) do |n|
  3.   sum += n if n.to_s.match /^[456]+$/
  4. end
  5. puts sum
Success #stdin #stdout 0.91s 7408KB
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Standard input is empty
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409632209
https://ideone.com/VrJznN
language:
Ruby (ruby 2.5.5)
created:
9 years ago
visibility:
public

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