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  1. while s = gets and a = s.strip.downcase.chars
  2. 	h = a.inject({}) { |h, c| h.merge c => (h[c] || 0) + 1 }
  3. 	puts a.map { |c| h[c] == 1 ? '(' : ')' }.join
  4. end
Success #stdin #stdout 0.02s 9792KB
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Success
(( @
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(((
)(()
()()()
)())())
))((
https://ideone.com/dfrHCE
language:
Ruby (ruby 2.5.5)
created:
9 years ago
visibility:
public

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