// editor   
#include<stdio.h>
 struct Order {
     int quality;
     float price_per_book;
     union{
         float discountRate;
         int discountpercent;
     }disc;
     float total_cost;
 };
 int main() {
     struct Order order;
     order.price_per_book = 100.0f;
     scanf("%d",&order.quality);
     if(order.quality<0) {
         printf("Invalid input");
         return 0;
     }
 }
 if(order.quality>=1 && order.quality<=5){
     order.disc.discountRate = 0.10f
 }
 else if(order.quality>=6 && order.quality<=10)
 {
     ord
 }
    return 0;
    
}