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geowa4/euler2.hs

Created February 8, 2013 01:13
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Project Euler Problem #2
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euler2.hs
fib :: Int -> Int
fib 1 = 1
fib 2 = 2
fib n = fib (n - 1) + fib (n - 2)
euler2 = sum $ takeWhile (<4000000) $ filter (even) [fib x | x <- [1..]]
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