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# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Linq;

namespace ConsoleApp18
{
    class Program
    {
        static void Main(string[] args)
        {
            string line = Console.ReadLine();
            string[] array = line.Split(' ');
            
            int a = int.Parse(array[0]);
            int b = int.Parse(array[1]);

            int count=0;

            for (int i = a; i <= b; i++)
            {
                string s = i.ToString();
                if (s.Reverse().SequenceEqual(s))
                {
                    count++;
                }
 
            }
            Console.WriteLine(count);

        }
    }
}