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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

//精選10問⑤の類題
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace AtCoder
{
    public class ABC_090_C
    {
        public static void Main()
        {
            var str = Console.ReadLine().Split(' ');
            var a = int.Parse(str[0]);
            var b = int.Parse(str[1]);
            var result = 0;

            for (int i =a;i<=b;i++){
                string num = i.ToString();
                if (num[0] == num[4] && num[1] == num[3])
                {
                    result++;
                }
            }
            Console.WriteLine(result);
            Console.Read();
        }

    }
}