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
list($a, $b) = ints();
$cnt = 0;
for ($i = $a; $i <= $b; $i++) {
    $s = strval($i);
    if ($s[0] === $s[4] && $s[1] === $s[3]) $cnt++;
}
echo $cnt;

function ints()
{
    return array_map('intval', explode(' ', trim(fgets(STDIN))));
}