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  1. main = interact c
  2.  
  3. (a:s)!(b:t)|a==b=a:t|1<3=a:s!t
  4. s!_=s
  5. m?s|length s==m=s|a<-s!drop m s=(last$0:[m+1|a==s])?a
  6. c=(0?)
Success #stdin #stdout 0s 4724KB
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https://ideone.com/NkXY2C
language:
Haskell (ghc 8.4.4)
created:
7 years ago
visibility:
public

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