#include <stdio.h>

double getFree(int time, double distance)

{

    double starting_price = 13;//起步价

    double starting_distance = 3;//起步里程

    double unit_price = 2.3;//单价

    double actual_price = (time > 23 || time < 5) ? unit_price * 1.2 : unit_price;//夜间单价

    double extra_price = 1;//燃油费

    if (distance <= starting_distance)

    {

        return starting_price + extra_price;

    }

    else

    {

        return starting_price + extra_price + actual_price * (distance - starting_distance);

    }

}

int main()

{

    double resFree = getFree(9, 12) + getFree(18, 12);

    printf("%f",resFree);

    return 0;

}