natToBin :: Int -> [Int]Näiteks:
natToBin 0 ==> [0] natToBin 1 ==> [1] natToBin 4 ==> [1,0,0] natToBin 7 ==> [1,1,1]
takeUntilRep :: Eq a => [a] -> [a]Näiteks:
takeUntilRep [1,2,3,3] ==> [1,2,3] takeUntilRep [1,2,1,4,2] ==> [1,2] takeUntilRep [1,2,3,4,5] ==> [1,2,3,4,5]
split2 :: [a] -> ([a], [a])Näiteks:
split2 [1..10] ==> ([1,3,5,7,9],[2,4,6,8,10]) split2 [3,1,4] ==> ([3,4],[1])
twice f = f . f
Redutseerida allpool toodud avaldis normaalkujule kasutades normaaljärjekorda / aplikatiivset järjekorda / laiska väärtustamist.
twice twice (+1) 2
(sum . concat . takeWhile (not . null) . iterate tail) [1..3]Vali üks toodud variantidest:
(a) 6 (b) 10 (c) 14 (d) 18