题解 | #公共子串计算#

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 a = "", b = "";
         int out = 0;
         // 注意 hasNext 和 hasNextLine 的区别
         while (in.hasNextLine()) { // 注意 while 处理多个 case
             a = in.nextLine();
             b = in.nextLine();
            
        }
         for (int starti = 0; starti < a.length(); starti++) {
             for (int endi = starti+1; endi <= a.length(); endi++) {
                 if (b.contains(a.substring(starti, endi))) {
                     int outi = endi - starti;
                     if (out < outi) {
                         out = outi;
                    }
                }
            }
        }
         System.out.println(out);
    }
}