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  1. main = interact f
  2.  
  3. g 0=[""]
  4. g n|a<-g$n-1=map('0':)a++map('1':)(reverse a)
  5. d=dropWhile
  6. f s=d(=='0')$(d(/='0':s)$g$1+length s)!!1
Success #stdin #stdout 0s 4724KB
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https://ideone.com/lkL7ta
language:
Haskell (ghc 8.4.4)
created:
8 years ago
visibility:
public

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