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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.Scanner;

class Main {

    private static Scanner sc = new Scanner(System.in);

    public static void main(String[] args) {
        int a = sc.nextInt(), b = sc.nextInt();
        int count = 0;
        for (int i = a; i <= b; i++) {
            String s = String.valueOf(i);
            StringBuilder sb1 = new StringBuilder(s.substring(0, s.length() / 2));
            StringBuilder sb2 = new StringBuilder();
            if (s.length() % 2 == 0) {
                sb2.append(s.substring(s.length() / 2, s.length()));
            } else {
                sb2.append(s.substring(s.length() / 2 + 1, s.length()));
            }
            if (sb1.toString().equals(sb2.reverse().toString())) {
                count++;
            }
        }
        System.out.println(count);
    }
}