#include<stdio.h>
#include<malloc.h>
int main()
{
int score,i=0;
int length=1;
int *p = (int *)malloc(sizeof(int)*length);
while(scanf("%d",&score)!=EOF)
{
p[i]=score;
i++;
p=(int *)realloc(p,sizeof(int)*(++length));
}
for(i=0;i<length-1;i++)
{
int temp=p[i]/10;
if((temp==9||temp==10)&&p[i]<=100) printf("%s\n","A");
if(temp==8) printf("%s\n","B");
if(temp==7) printf("%s\n","C");
if(temp==6) printf("%s\n","D");
if(tem......
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