import java.io.PrintWriter;
import java.util.Scanner;

class Caravan {
    int totalMiles;
    double totalGalsUsed;
    java.util.ArrayList<Car> myCars;

    Caravan() {
        this.totalMiles = 0;
        this.totalGalsUsed = 0.0;
        this.myCars = new java.util.ArrayList<Car>();
    }

    void add(Car c) {
        if (c.getYearsOld() < 200) {
            this.myCars.add(c);
        }
    }

    public String toString() {
        String retval = "This is a caravan that has traveled " +
            this.totalMiles + " miles.\n";
        retval += "And it has these stellar vehicles:\n";
        java.util.Collections.sort(myCars);
        for (int i=0; i<myCars.size(); i++) {
            retval += "  " + (i+1) + "." + myCars.get(i) + "\n";
        }
        return retval;
    }

    void persist(PrintWriter pw) {
        pw.println("Road trip!!");
        pw.println(totalMiles);
        pw.println(totalGalsUsed);
        for (int i=0; i<myCars.size(); i++) {
            myCars.get(i).persist(pw);
        }
        pw.println("Those are all the cars!");
    }

    Caravan(Scanner s) {
        s.nextLine();    // throw away meaningless flex
        this.totalMiles = Integer.parseInt(s.nextLine());
        this.totalGalsUsed = Double.parseDouble(s.nextLine());

        System.out.println("I now have a Caravan with " + totalMiles + 
            " miles and " + this.totalGalsUsed + " gals used.");

        this.myCars = new java.util.ArrayList<Car>();
        
        try {
            while (true) {
                Car nextCar = new Car(s);
                this.myCars.add(nextCar);
            }
        } catch (Exception e) {
            System.out.println("All done with cars!");
        }
    }



}