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

class Nov6 {
	public static void main(String[] args) {


		Scanner fin = null;
		try {
			fin = new Scanner(new File("circles.txt"));
		}
		catch(FileNotFoundException e) {
			e.printStackTrace();
			System.exit(0);
		}

		int numCircles = fin.nextInt();

		Circle[] circles = new Circle[numCircles];		
		for(int i = 0; i < numCircles; i++) {
			double radius = fin.nextDouble();
			Circle c = new Circle(radius);
			circles[i] = c;
		}

		printCircles(circles);

		PrintWriter pw = null;

		try {
			pw = new PrintWriter("circles.backup");
		}
		catch (FileNotFoundException e) {
			System.out.println("file not found");
			System.exit(0);
		}

		pw.println(numCircles);
	
		for(Circle c : circles) {
			pw.println(c.getRadius());
		}

		pw.close();


	
	
	}

	public static void printCircles(Circle[] arr) {
		for(Circle s : arr) {
			System.out.println(s);
		}

	}
}