//	Q.A. 2
//	John Wang
//	Goal: read one integer, out its double

import java.util.Scanner;
class QA911_2
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);

		System.out.print("Input one integer: ");
		int num1 = input.nextInt();
		int num2;

		num2 = num1 * 2;

		System.out.println("num2 = " + num2 + "\n\n\n");

	}
}