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  1. import Data.List
  2.  
  3. r[]="YES";r(a)="NO";p(s)=r.tail.filter odd.map length.group$sort s
  4.  
  5. main =
  6.   print $ map p [
  7.     "aab",
  8.     "abc",
  9.     "racecar",
  10.     "aaa"
  11.   ]
  12.  
Success #stdin #stdout 0.01s 5408KB
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Standard input is empty
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["YES","NO","YES","YES"]
https://ideone.com/YeNNSO
language:
Haskell (ghc 8.4.4)
created:
297 days ago
visibility:
secret

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