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 Ruby (2.3.3) (judge verdict: Accepted)

A, B = gets.chomp.split
cnt = 0
(A[0..1].to_i..B[0..1].to_i).each do |i|
    (1..99).each do |j|
        if i.to_s == j.to_s.rjust(2, '0').reverse
            (0..9).each do |k|
                n = i * 1000 + k * 100 + j
                cnt += 1 if n.between?(A.to_i, B.to_i)
            end
        end
    end
end
puts cnt