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>
#include <string.h>

int main(void){

    int a,b,ans=0 ;
    scanf ("%d%d",&a,&b) ;
    
    for (int i=a; i<=b; i++ ){
        
        if ( i%10==i/10000 ){
            
            int j = (i-(i/10000)*10000)/10 ;
            
            if ( j%10==j/100 ){
                
                ans++ ;
                
            }
        }
    }
    
    printf ("%d\n",ans) ;
    
    return 0 ;
}