题解 | #最长回文子串#暴力破解，循环截取字符串，将截取的字符串反转，如果是回文串则记录长度

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()){
            String str = sc.nextLine();
            int max = 0;
            for(int i = 0 ;i < str.length(); i++){
                for(int j = i + 1; j <= str.length(); j++){
                    if(str.substring(i,j).equals(new StringBuilder(str.substring(i,j)).reverse().toString())){
                        if(j - i > max){
                            max = j - i;
                        }
                    }
                }
            }
            System.out.println(max);
        }
    }
}