100901: [AtCoder]ABC090 B - Palindromic Numbers

Memory Limit:256 MB Time Limit:2 S
Judge Style:Text Compare Creator:
Submit:0 Solved:0

Description

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

Input

题意翻译

查找在整数$A$与$B$之间回文数的个数 在这里回文数是指无论从前向后读还是从后向前读都一样的数

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