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)

require 'pp'

A,B=gets.chomp.split(' ').map{|n| n.to_i}

sum = 0
A.upto(B){|i|
	a_5 = i%10
	a_4 = i/10%10
	a_3 = i/100%10
	a_2 = i/1000%10
	a_1 = i/10000%10
	if(a_5 == a_1 && a_4 == a_2)
		sum += 1
	end
}
puts sum