题解 | #挂科危险#

#include<stdio.h>
int main()
{
    int i;
    while(scanf("%d",&i)!=EOF)
    {
        switch (i)
        {
            case 0:
            case 1:
            case 2:
            case 3:
                printf("Good\n");
                break;
            case 4:
            case 5:
            case 6:
            case 7:
            case 8:
            case 9:
                printf("Danger\n");
                break;
          
            default:
                printf("Danger++\n");
                break;
        }
    }
    return 0;

}