题解 | #最长回文子串#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String thisStr = in.nextLine();
        int thisLength = thisStr.length();
        int endi = 0;int lengthmax = 1;
        for(int length = 1;length<=thisLength;length++){
            for(int starti = 0;starti+length<=thisLength;starti++){
                String boolStr = thisStr.substring(starti,starti+length);
                if(isneedStr(boolStr)){
                    lengthmax = length;
                    continue;
                }
            }
        }
        System.out.println(lengthmax);
    }
    //判断是否为回文字符串
    public static Boolean isneedStr(String s){
        for(int i=0;i<=s.length()/2;i++){
            if(!(s.charAt(i)==s.charAt(s.length()-1-i))){
                return false;
            }
        }
        return true;
    }
}