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 LuaJIT (2.0.4) (judge verdict: Accepted)

local flo = math.floor

local function div_flo(divided, dividing)
	return flo(divided / dividing)
end

local A, B = io.read("*n", "*n")

local div_A = div_flo(A, 100)
local div_B = div_flo(B, 100)

local count = 0
for i = div_A, div_B do
	local pal = tonumber(tostring(i)..tostring(div_flo(i, 10)):reverse())
	if A <= pal and pal <= B  then
		count = count + 1
	end
end

print(count)