using System;

public class Program

{

    public static void Main()

    {

    Random R = new Random();

    Random N = new Random();

    Random A1 = new Random();

    Console.WriteLine("A1 = " + A1.Next(1, 10) + "\nN = " + N.Next(10, 41) + "\nR = " + R.Next(1, 6) + "\n\nFind An and then Sn");

​

}

    }

​

​