#include <stdio.h>
int main()
{
float score;
scanf("%f",&score);
if(score>=90)
printf("分数为%0.2f 等级为A",score);
else if(score>=80)
printf("分数为%0.2f 等级为B",score);
else if(score>=70)
printf("分数为%0.2f 等级为C",score);
else if(score>=60)
printf("分数为%0.2f 等级为D",score);
else
printf("分数为%0.2f 等级为E",score);
return 0;
}