题解 | #挂科危险#

#include <stdio.h>

int main() {
    int a;
    while (scanf("%d", &a) != EOF) {
        if (a >= 10) {
            printf("Danger++\n");
        } else if (a >= 0 && a <= 3) {
            printf("Good\n");
        } else {
            printf("Danger");
        }
    }
    return 0;
}