#include <stdio.h>
int main(){
double r;
double x1;
if (scanf("%lf",&x1)!=EOF){
if (x1>=0){
if (x1<=50){r=0.53*x1;}
if(x1>50){r=0.53*x1+0.05*(x1-50);}
printf("cost = %.2lf",r);
}else{
printf("Invalid Value!");
}
}else{
printf("input wrong");
}
return 0;
}
京公网安备 11010702002337 号