using System;

public struct Rectangle {  

    public int length;

    public int width;

    // A constructor with all default parameters.

    public Rectangle(int l = 1, int w = 1) {

        length = l;

        width = w;

    }

    public int Perimeter() {

        return 2*length + 2*width;

    }

 }

 public class Program

 {

      public static void Main() {

        Rectangle rectangle = new Rectangle();

        Console.WriteLine("{0}", rectangle.Perimeter());

      }

 }