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 Rust (1.42.0) (judge verdict: Accepted)

use proconio::input;
fn main() {
    input! {
        a:usize,
        b:usize,
    }
    let mut cnt = 0;
    for i in a..=b {
        let i_5 = i / 10 / 10 / 10 / 10;
        let i_4 = i / 10 / 10 / 10 - i_5 * 10;
        let i_3 = i / 10 / 10 - i_4 * 10 - i_5 * 100;
        let i_2 = i / 10 - i_3 * 10 - i_4 * 100 - i_5 * 1000;
        let i_1 = i - i_2 * 10 - i_3 * 100 - i_4 * 1000 - i_5 * 10000;
        if i_5 == i_1 && i_4 == i_2 {
            cnt += 1;
        }
    }
    println!("{}", cnt);
}