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 C (GCC 5.4.1) (judge verdict: Accepted)

# include <stdio.h>

int main(){
  int a, b;
  scanf("%d %d", &a, &b);
  int a_flg, b_flg;
  a_flg = (a/100) * 100
    + ((a/1000)%10) * 10
    + (a/10000) - a >= 0;
  b_flg = (b/100) * 100
    + ((b/1000)%10) * 10
    + (b/10000) - b <= 0;
  printf("%d\n",b/100-a/100-1+a_flg+b_flg);
 return 0; 
}