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Longest Palindromic Substring InterviewBit Solution

Problem: Longest Palindromic Substring

Problem Description:

Given a string S, find the longest palindromic substring in S.

Substring of string S:

S[i...j] where 0 <= i <= j < len(S)

Palindrome string:

A string which reads the same backwards. More formally, S is a palindrome if reverse(S) = S.

In case of conflict, return the substring which occurs first ( with the least starting index ).

Example :

Input : "aaaabaaa" 
Output : "aaabaaa"