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package ProgrammingBasics;

import java.util.Scanner;

public class SeaTrip {
    public static void main(String[] args){
        Scanner scanner = new Scanner(System.in);

        double moneyForFood=Double.parseDouble(scanner.nextLine());
        double moneyForSouvenirs=Double.parseDouble(scanner.nextLine());
        double moneyForHotel=Double.parseDouble(scanner.nextLine());

        double tripKm= (420*1.0/100);
        double kMGas=tripKm*7;
        double moneyForGas=kMGas*1.85;

        double totalMoneyForFoodAndSouvenirs=3*(moneyForFood+moneyForSouvenirs);
        double hotelForFirstDay=moneyForHotel-moneyForHotel*0.1;
        double hotelForSecondDay=moneyForHotel-moneyForHotel*0.15;
        double hotelForThirdDay=moneyForHotel-moneyForHotel*0.2;

        double totalMoneyForHotel=hotelForFirstDay+hotelForSecondDay+hotelForThirdDay;

        double totalMoney=moneyForGas+totalMoneyForFoodAndSouvenirs+totalMoneyForHotel;

        System.out.printf("Money needed: %.2f",totalMoney);
    }
}