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#include <stdio.h>
#include<math.h>
int main()
{
float x;
char g;
scanf_s("%f", &x);
int y = x / 10;
switch (y)
{
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
g = 'E';
break;
case 6:
g = 'D';
break;
case 7:
g = 'C';
break;
case 8:
g = 'B';
break;
case 9:
case 10:
g = 'A';
break;
default:
printf("Not support!\n");
break;
/*
case'0':
case'1':
case'2':
case'3':
case'4':
case'5':g = 'E'; break;
case'6':g = 'D'; break;
case'7':g = 'C'; break;
case'8':g = 'B'; break;
case'9':
case'10':g = 'A';
*/
}
printf("%c %d", g,y);
return 0;
}