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  1. fibs = 0:1:zipWith (+) fibs (tail fibs)
  2. fib = (fibs !!)
  3.  
  4. main = let
  5. a = [fib 250000..]
  6. b = a!!0
  7. c = 1
  8. in b `seq` print c
Success #stdin #stdout 13.15s 16864KB
stdin
Standard input is empty
stdout
1