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  1. import Data.Char
  2.  
  3. main = do
  4.   putStrLn $ decode "W4E2H3"
  5.   putStrLn $ decode "A12T3Y4"
  6.  
  7. decode :: String -> String
  8. decode = concat . map expand . split
  9.  
  10. expand :: String -> String
  11. expand "" = ""
  12. expand (x:xs) = take (read xs) $ repeat x
  13.  
  14. split :: String -> [String]
  15. split = words . tail . foldr fn ""
  16.   where fn x acc = if (ord x < 48 || ord x > 57) then (' ':x:acc) else (x:acc)
Success #stdin #stdout 0s 8388607KB
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stdin
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Standard input is empty
stdout
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WWWWEEHHH
AAAAAAAAAAAATTTYYYY
https://ideone.com/nq33Iy
language:
Haskell (ghc 8.4.4)
created:
6 years ago
visibility:
public

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