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-csc 3.5.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using static System.Math;

namespace ConsoleApp15
{
    class Class404
    {
        static void Main()
        {
            var AB = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int A = AB[0], B = AB[1];
            int count = 0;
            for (int i = A; i <= B; i++)
            {
                string n1 = i.ToString();
                string n2 = string.Join("", n1.Reverse());
                if (n1 == n2) count++;
            }

            Console.WriteLine(count);
        }
    }
}