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[ghc-hetmet.git]
/
ghc
/
misc
/
examples
/
nfib
/
nfibR.hs
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module Main where
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main = print (nfib 20)
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nfib :: Rational -> Rational
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nfib n | n <= 1 = 1
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| otherwise = (n1 + n2 + 1)
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where n1 = nfib (n-1)
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n2 = nfib (n-2)