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)

using System;
using System.Linq;
using System.Collections.Generic;


namespace AtCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            MainStream();
        }
        static void MainStream()
        {
            Scan sc = new Scan();
            write wr = new write();

            int[] a_b = sc.intarr;
            int a = a_b[0];
            int b = a_b[1];

            int count = 0;

            for(int i=a; i<=b; i++)
            {
                int k1 = i / 10000;
                int k2 = (i-k1*10000) / 1000;
                int k3 = (i - k1 * 10000 - k2 * 1000) / 100;
                int k4 = (i - k1*10000 - k2 * 1000 - k3 * 100)/ 10;
                int k5 = i % 10;

                if(k1 == k5 && k2 == k4)
                {
                    count++;
                }
            }

            wr.wri(count);
        }


    }

    class Scan
    {
        public string str => Console.ReadLine();

        public string[] strarr => str.Split(' ');

        public long[] longarr => strarr.Select(long.Parse).ToArray();
        public int[] intarr => strarr.Select(int.Parse).ToArray();
        public char[] chararr => str.ToArray();


    }



    class write
    {
        public void wri<Type>(Type x)
        {
            Console.WriteLine(x);
        }
    }

    class Method
    {
        static public int max(params int[] nums)
        {

            int maxx = nums[0];
            for (int i = 1; i < nums.Length; i++)
            {
                maxx = Math.Max(maxx, nums[i]);
            }
            return maxx;
        }
    }
}