#include<stdio.h>
int main()
{
    int n;
    scanf("%d",&n);
    for(int i=0;i<n;i++)
    {
            int chengji;
            scanf("%d",&chengji);
            if(chengji>=90&&chengji<=100)
            printf("A");
            else if(chengji>=80&&chengji<=89)
            printf("B");
            else if(chengji>=70&&chengji<=79)
            printf("C");
            else if(chengji>=60&&chengji<=69)
            printf("D");
            else printf("E");
        printf("\n");
    }
    return 0;
}

#include<stdio.h> int main() { int a,b; scanf("%d",&a);

while(a--){ scanf("%d",&b); int c=b/10; switch(c){ case 9: case 10: printf("A\n");break; case 8: printf("B\n");break; case 7: printf("C\n");break; case 6: printf("D\n");break; default: printf("E\n");break;} } return 0; }

#include <stdio.h>

int main() { int n; scanf("%d",&n); int a[10]; for(int i=1;i<=n;i++){ scanf("%d",&a[i]); } for(int i=1;i<=n;i++){ if(90<=a[i] && a[i]<=100){ printf("A\n"); } else if(80<=a[i] && a[i]<=89){ printf("B\n"); } else if(70<=a[i] && a[i]<=79) { printf("C\n"); } else if(60<=a[i] && a[i]<=69){ printf("D\n"); } else if(0<=a[i] && a[i]<=59){ printf("E\n"); } }

return 0;

}

#include<stdio.h> int main() { int N,M; scanf("%d",&N);//输入要转换的组数 while(N--) { scanf("%d",&M); if(M>=0&&M<=59) { printf("E\n"); } if(M>=60&&M<=69) { printf("D\n"); } if(M>=70&&M<=79) { printf("C\n"); } if(M>=80&&M<=89) { printf("B\n"); } if(M>=90&&M<=100) { printf("A\n"); } } return 0; }