The Next Palindrome

QUESTION:

 A positive integer is called a palindrome if its representation in the decimal system is the same when read from left to right and from right to left. For a given positive integer K, write the value of the smallest palindrome larger than K to output.
Input
The first line contains an integer, which corresponds to K. Assume that K is less than 200000.
Output
Output consists of a single integer, which corresponds to the smallest palindrome larger than K.
Sample Input 1:
808
Sample Output 1:
818
Sample Input 2:
2133
Sample Output 2:
2222
SOLUTION:
#include<stdio.h>
int main()
{
    long int num,pa=0,rem,temp;
    scanf("%ld",&num);
    while(num!=pa)
    {
        num=num+1;
        temp=num;
        pa=0;
        while(temp!=0)
        {
            rem=temp%10;
            pa=rem+pa*10;
            temp=temp/10;
        }
    }
    printf("%ld",pa);
    return 0;
}

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