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 PHP (5.6.30) (judge verdict: Accepted)

<?php
$hoge = explode(' ',trim(fgets(STDIN)));

$piyo = intval(substr($hoge[0],0,2));
$i=0;$s=0;$a = 0;
while(true){
    $n = intval($piyo.$i.substr($piyo,1).substr($piyo,0,1));
    if($n >= $hoge[0] && $n <= $hoge[1]){
        $s++;
    }else if($n > $hoge[1]){
        echo $s;
        exit;
    }
    if($i === 9){
        $piyo++;
        $i = 0;
    }else{
        $i++;
    }
}
?>