Link SPOJ: https://www.spoj.com/problems/PALIN/
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 of not more than 1000000 digits, write the value of the smallest palindrome larger than K to output. Numbers are always displayed without leading zeros.
The first line contains integer t, the number of test cases. Integers K are given in the next t lines.
For each K, output the smallest palindrome larger than K.
Input: 2 808 2133 Output: 818 2222
Please try to solve first, before moving into the solution.