题解 | #网购#
网购
https://www.nowcoder.com/practice/5d7dfd405e5f4e4fbfdff6862c46b751
#include <stdio.h>
int main(){
double r = 0.0;
int m = 0;
int d = 0;
int q = 0;
scanf("%lf %d %d %d", &r, &m, &d, &q);
if(m==11&&d==11){
r = r * 0.7 - 50.0 * q;
}else if(m==12&&d==12){
r = r * 0.8 - 50.0 * q;
}
if(r < 0){
printf("0.00\n");
}else{
printf("%.2lf\n", r);
}
return 0;
}
