本题要求给定字符串的最长回文子串长度，由于数据量过大，我们使用manacher算法求字符串的最长回文子串长度。-Can you propose an efficient algorithm to find the length of the largest palindrome in a string?

寻找回文子串是一道经典的面试题，本代码旨在解决字符可删情况下的寻找最长回文子串问题。-Finding the longest palindromic substring is one of the most typical face questions, the source code uploaded is aimed to finding the longest palindromic substring while the characters are removable.

给定一个字符串，找出该字符串的最长回文子串。(Given a string, find the longest palindrome substring of the string.)