1 #include <iostream>
 2 using namespace std;
 3 char grand(int);
 4 int main()
 5 {
 6     int n;
 7     while (cin>> n)
 8     {
 9         if (n>100 || n<0)
10         {
11             cout << "Score is error!" << endl;
12             continue;
13         }
14         cout<< grand(n)<< endl;
15     }
16 }
17 
18 char grand(int n)
19 {
20     switch (n/10)
21     {
22     case 9:
23     case 10:
24         return ‘A‘;
25         break;
26     case 8:
27         return ‘B‘;
28         break;
29     case 7:
30         return ‘C‘;
31         break;
32     case 6:
33         return ‘D‘;
34         break;
35     default:
36         return ‘E‘;
37         break;
38     }
39 }