#yyds干货盘点# BC37 网购 _1_11

#yyds干货盘点# BC37 网购 _1_11

#include<stdio.h>
int main()
{
    double price = 0;//商品价格
    int month = 0;
    int day = 0;
    int flag = 0;//flag表示有无优惠券
    scanf("%lf %d %d %d",&price,&month,&day,&flag);
    if(month==11 && day == 11)
    {
        price=price*0.7;
    }
    if(month ==12 && day ==12)
    {
        price =price *0.8;
    }
    price =price -50*flag;
   if(price<0.0)
   {
       printf("%.2lf",0.00);
   }
    else
        printf("%.2lf",price);
    return 0;
}