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  1. # answer: http://o...content-available-to-author-only...e.jp/qa/q6932517.html
  2.  
  3. SUFFIXES = %w[f s]
  4.  
  5. $stdin.each.with_index do |line, idx|
  6.   mark, number = line.split ' '
  7.   puts ">#{mark}#{SUFFIXES[idx % 2]}", ">#{number}"
  8. end
Success #stdin #stdout 0s 4760KB
comments (?)
stdin 
A 1234
A 2345
B 3456
B 4567
stdout 
>Af
>1234
>As
>2345
>Bf
>3456
>Bs
>4567
https://ideone.com/pogvK
language:
Ruby (ruby 2.5.5)
created:
14 years ago
visibility:
secret

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