public class Main { public static void main(String[] args) { //write your code here........ //输入为9,99,999,9999,99999,999999,9999999,99999999,999999999,9999999999 long sum = 0; long ini = 9;//此数量级可用long类型存储 for(int i = 0; i < 10; i++){ sum += ...