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  1. import Data.List
  2.  
  3. step = concatMap (\s -> (show $ length s) ++ [head s]) . group
  4.  
  5. main = do
  6.     mapM_ putStrLn $ take 10 $ iterate step "1"
Success #stdin #stdout 0s 6264KB
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Standard input is empty
stdout
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1
11
21
1211
111221
312211
13112221
1113213211
31131211131221
13211311123113112211
https://ideone.com/ztuitx
language:
Haskell (ghc 8.4.4)
created:
12 years ago
visibility:
secret

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