Functional Programming Contest

比赛链接

Ａ题

-- Enter your code here. Read input from STDIN. Print output to STDOUT
main = do
    x <- getLine
    y <-  getLine
    putStrLn $ reverse $ foldl (acc (x, y) -> [y]++[x]++acc) [] $ zip x y

Ｂ题

1 -- Enter your code here. Read input from STDIN. Print output to STDOUT
2 import Data.List
3 main = do
4     inputdata <- getLine
5     putStrLn . concat . map (xs -> f (head xs) (length xs)) . group $ inputdata 
6         where 
7             f ch len
8                 | len == 1 = [ch]
9                 | otherwise = [ch] ++ show len

Ｃ题

-- Enter your code here. Read input from STDIN. Print output to STDOUT
import Data.Char
main::IO ()
main = getContents >>= print . ([n, k] -> superDigit ((read k) * getStrSum(n))) . words

superDigit::Int -> Int
superDigit n
    | n < 10 = n
    | otherwise = superDigit . getSum $ n

getSum::Int -> Int
getSum 0 = 0
getSum n  = (n `rem` 10) + getSum ( n `div` 10)

getStrSum::String -> Int
getStrSum [] = 0
getStrSum (x:xs) = ord x - ord '0' + getStrSum xs 

Ｄ题

Ｅ题