#define PRICE 2.3

#define TAX 1

#include <stdio.h>

//#include<iostream>

//using namespace std;

double getmoney( int distance){

    const int start_price=13;

    int money;

    double money_night;

    money=start_price+(distance-3)*PRICE+TAX;

    money_night=start_price+(distance-3)*PRICE*1.2+TAX;

    return (double)money+money_night;

}

int main()

{

    double temp;

    temp=getmoney(12);

    printf("%.1f",temp);

    //cout<<temp<<endl;

    //system("pause");

    return 0;

}