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276 B
Haskell

myRepeat :: a -> [a]
myRepeat n = cycle [n]
subseq :: Int -> Int -> [a] -> [a]
subseq start end aList = take end (drop start aList)
inFirstHalf :: Eq a => a -> [a] -> Bool
inFirstHalf item aList = item `elem` firstHalf
where firstHalf = take (length aList `div` 2) aList