【Codeforces Round#620 (Div. 2)】B. Longest Palindrome 题解

题目链接:B. Longest Palindrome 题目 Returning back to problem solving, Gildong is now studying about palindromes. He learned that a palindrome is a string that is the same as its reverse. For example, strings “pop”, “noon”, “x”, and “kkkkkk” are palindromes, while strings “moon”, “tv”, and “abab” are not.