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module Scratch where
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neg :: Integer -> Integer
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neg x = (-x)
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sumTo20 :: [Integer] -> Integer
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sumTo20 nums = sumTo20Acc 0 nums
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sumTo20Acc :: Integer -> [Integer] -> Integer
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sumTo20Acc acc [] = acc
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sumTo20Acc acc (x:xs)
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| acc >= 20 = acc
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| otherwise = sumTo20Acc (acc + x) xs
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