Longest Palindromic Substring

Given a string, return the longest palindromic substring within it.

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Statement

Given a string of characters, find and return the longest palindromicA palindrome is a sequence of characters that reads the same backwards as forwards, for example, racecar. substring within the input string.

Examples

Example 1

Sample input

"bccd"

Expected output

"cc"

Example 2

Sample input

xaabacxcabaaxcabaax

Expected output

xaabacxcabaax

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