import java.util.ArrayList;
import java.util.Scanner;

public class Test {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        System.out.println("Enter the numbers: ");

        ArrayList<Double> numbers = new ArrayList<Double>();
        double number = 0.00;
        while (in.hasNextDouble() && (number = in.nextDouble()) >= 0){

            numbers.add(number);
        }

        for (Double d : numbers)
            System.out.println(d.doubleValue());
    }

}