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.split.map(&:to_i)

sum = 0
(a..b).to_a.each do |i|
    hoge = i.to_s.split("")
    fuga = hoge.length / 2
    flag = 0
    fuga.times do |j|
        if hoge[j] != hoge[(j+1)*(-1)]
            flag = 1 
            break
        end
    end
    sum += 1 if flag == 0
end
puts sum