11 lines
336 B
Haskell
11 lines
336 B
Haskell
-- Version 1
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evenSum :: [Integer] -> Integer
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evenSum l = accumSum 0 l
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accumSum n l = if l == []
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then n
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else let x = head l
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xs = tail l
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in if even x
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then accumSum (n+x) xs
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else accumSum n xs
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