Problem:
Score : 100 points

Problem Statement

How many hours do we have until New Year at M o'clock (24-hour notation) on 30th, December?

Constraints

1≤M≤23

M is an integer.

Input

Input is given from Standard Input in the following format:

M

Output

If we have x hours until New Year at M o'clock on 30th, December, print x.

Sample Input 1

21

Sample Output 1

27

We have 27 hours until New Year at 21 o'clock on 30th, December.

Sample Input 2

12

Sample Output 2

36

Solution in Haskell (GHC 7.10.3) (judge verdict: Wrong Answer)

import Control.Monad
import Data.Maybe
import qualified Data.ByteString.Char8 as BS

readInt = fst . fromJust . BS.readInteger
getInt = readInt <$> BS.getLine
-- readIntList = map readInt . BS.words
-- getIntList = readIntList <$> BS.getLine
-- getIntMatrix = map readIntList . BS.lines <$> BS.getContents
main = do
    arg <- getInt
    print (solve arg)


solve :: Integer -> Integer
solve arg = (arg - 1 ) + 24