Longest palindrome in a string

Question

input : babcbab qwwq
output : longest palindrome = babcbab
length = 7

Answer 1

string pal = "tattarrattat";

Defined by the Oxford Dictionary, but either use your search engine or rephrase this question that explains why you need someone here (like me) to answer it if it is not as simple as it looks.

Answer 2

what is this?