1 #include<iostream>
 2 
 3 using namespace std;
 4 
 5 // 计算回文数之和 
 6 int sum(int x)
 7 {
 8     int s = 0;
 9     while(x)
10     {
11         s += (x%10);
12         x /= 10;
13     }
14     return s;
15 }
16 // 判断是否为回文数 
17 bool get(int x)
18 {
19     int i = 0;
20     int a[7] = {0};
21     while(x)
22     {
23         a[i] = x%10;
24         i++;
25         x /= 10;
26     }
27     if(i == 5 && a[0] == a[4] && a[1] == a[3])
28         return true;
29     if(i == 6 && a[0] == a[5] && a[1] == a[4] && a[2] == a[3])
30         return true;
31     return false;    
32 }
33 
34 // 解 
35 bool sure(int n)
36 {
37     int c = 0;
38     for(int i=10001;i<=999999;i++){
39         if(get(i) && sum(i) == n){
40             cout<<i<<endl;
41             c++;
42         }
43     }
44     if(c == 0){
45         cout<<"-1"<<endl;
46         return false;
47     }
48  } 
49 
50 int main()
51 {
52     int n;
53     while(cin>>n)
54     {
55         sure(n);
56     }
57 
58     return 0;
59 }