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.Text;
using System.Linq;
using System;
using System.IO;

class Program
{
  static void Main(string[] args)
  {
    var seq = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
    var a = seq[0];
    var b = seq[1];

    var cnt = 0;
    for(int i = a; i <= b; i++)
    {
      var sf = i.ToString();
      var sr = string.Join("", sf.Reverse());
      if(sf == sr) cnt++;
    }
    Console.WriteLine(cnt);
  }
}