import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { private static char[] arr = new char[]{ '2', '2', '2', '3', '3', '3', '4', '4', '4', '5', '5', '5', '6', '6', '6', '7', '7', '7', '7', '8', '8', '8', '9', '9', '9', '9' }; public static v...