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;
class Program
{
    static void Main(string[] args)
    {
        string[] s = Console.ReadLine().Split(' ');
        int A = int.Parse(s[0]);
        int B = int.Parse(s[1]);
        int sum = 0;
        for (int i = 0; i <= 9; i++)
        {
            for (int j = 0; j <= 9; j++)
            {
                for (int k = 0; k <= 9; k++)
                {
                    int PalindromeCount = 10001 * i + 1010 * j + 100 * k;
                    if (B >= PalindromeCount && PalindromeCount >= A)
                        sum++;
                }
            }
        }
        Console.WriteLine(sum);
    }
}