Shortest Palindrome
Given a string, find the shortest possible string which can be achieved by adding characters to the end of initial string to make it a palindrome.
Example
For st = "abcdc", the output should be buildPalindrome(st) = "abcdcba"
Input/Output
- [execution time limit] 20 seconds (swift)
- [input] string st
A string consisting of lowercase English letters.
Guaranteed constraints:
3 <= st.length <= 10
- [output] string