using System;

public class Program

{

    public static void Main()

    {

        int N = 5;

        int s=0;    

        // m la so lan chia het cho i

        int m;

        int n=0;

        double tbc;

        Console.Write($"Cac so nguyen to tu 0 den {N} la: ");

        for (int M=1; M<N; M++)

        {

            m=0;

            for (int i=2; i <= M/2; i++)

            {

                if (M%i==0)

                {

                    m++;

                    break;

                }

            }

        if (m==0 && M!=1)

        {   

            Console.Write($"{M} ");

            s+=M;

            n++;

        }   

        }

        Console.Write("\n");

        tbc=(1.0)*s/n;

        Console.Write($"Trung binh cong cac so nguyen to tu 0 den {N} la: ");

        Console.Write($"{tbc} ");

    }

}