Problem:
Score : 200 points

Problem Statement

Find the number of palindromic numbers among the integers between A and B (inclusive).
Here, a palindromic number is a positive integer whose string representation in base 10 (without leading zeros) reads the same forward and backward.

Constraints

10000 \leq A \leq B \leq 99999

All input values are integers.

Input

Input is given from Standard Input in the following format:

A B

Output

Print the number of palindromic numbers among the integers between A and B (inclusive).

Sample Input 1

11009 11332

Sample Output 1

4

There are four integers that satisfy the conditions: 11011, 11111, 11211 and 11311.

Sample Input 2

31415 92653

Sample Output 2

612

Solution in Haskell (GHC 7.10.3) (judge verdict: Accepted)

import qualified Data.ByteString.Char8 as C

main :: IO ()
main = do
  [a,b] <- map read . words <$> getLine
  print $ numOfPlndrm a b

numOfPlndrm
  :: Int -> Int -> Int
numOfPlndrm a b = length [x | x <- [a .. b], isP x]

isP 
  :: Int -> Bool
isP n = c == C.reverse c
  where
    c = C.pack $ show n