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 PHP7 (7.0.15) (judge verdict: Accepted)

<?php
  fscanf(STDIN,"%d %d",$a,$b);
  $count = 0;
  for($j=$a; $j<=$b; $j++){
    $i = strval($j);
    if($i[0] == $i[4] && $i[1] == $i[3]){
      $count++;
    }
  }
  echo $count."\n";