1 package demi;
 2 
 3 import java.util.Arrays;
 4 import java.util.Scanner;
 5 
 6 public class Main {
 7 
 8     public static void main(String[] args) {
 9         
10         Scanner in = new Scanner(System.in);
11         int t;
12         t = in.nextInt();
13         int[] x = new int[t];
14
 
         for (int i = 0; i < t; i ++) {
15             x[i] = in.nextInt();
16         }
17         System.out.println(t);
18         for (int i = 0; i < t; i ++) {
19             System.out.println(x[i]);
20         }
21 
22         for (int i = 0; i < t; i ++) {
23             if (RearrangeDivided(x[i])) {
 
24                 System.out.println(x[i] + "    Possible");
25             }else {
26                 System.out.println(x[i] + "    Impossible");
27             }
28         }
29     }
30     
31 //    判斷一個整數是否有能整除它的混排
32     public static boolean RearrangeDivided(int num) {
33         boolean ret = false
 
;
34         int bit, tmpNum;
35         String str = String.valueOf(num), tmpS;
36         bit = str.length();
37         if(bit == 0) {
38             return ret;
39         }
40         for (int i = 2; i <= 9; i ++) {
41             tmpNum = num * i;
42             tmpS = String.valueOf(tmpNum);
43             if(isRearrange(str, tmpS)) {
44                 ret = true;
45                 return ret;
46             }
47         }
48         return ret;
49     }
50     
51 //  判斷兩個字符串是否是一個組合的不同排列
52     public static boolean isRearrange(String str1, String str2) {
53         boolean ret = false;
54         
55 //        字符串轉成字符數組排序
56         char[] c1 = str1.toCharArray();
57         char[] c2 = str2.toCharArray();
58         Arrays.sort(c1);
59         Arrays.sort(c2);
60         
61 //        比較內容相等,字符數組轉成字符串比較是否相等
62         String newStr1 = new String(c1);
63         String newStr2 = new String(c2);
64         
65         if(newStr1.length() != newStr2.length()){
66             return ret;
67         }else if (newStr1.equals(newStr2)) {
68                 ret = true;
69         }
70         return ret;
71     }
72     
73 }

網易筆試題目-2017-9-25