maximum' [] = error "maximum of empty list"
maximum' [x] = x
maximum' (x:xs)
        | x > current = x
        | otherwise = current
        where current = maximum' xs

        
minimum' [] = error "minimum of empty list"
minimum' [x] = x
minimum' (x:xs)
        | x < current = x
        | otherwise = current
        where current = minimum' xs
{-
Liste -> Tupel mit min max raus

-}




seekMaxMin' [] = (0,0)
seekMaxMin' [x] = (x,x)
seekMaxMin' (x:xs) = (minimum' xs, maximum' xs)