小案例

 1 package com.baidu.demo;
 2
 3 public class Demo01 {
 4     public static void main(String[] args) {
 5         for (int i = 0; i < 2015; i++) {
 6             int b = i / 1000;
 7             int c = (i - b * 1000) / 100;
 8             int d = (i - b * 1000 - c * 100) / 10;
 9             int e = (i - b * 1000 - c * 100 - d * 10);
10             if (2015 - i == b + c + d + e) {
11                 System.out.println(i);
12             }
13         }
14     }
15 }

答案是1993和2011