using System;

public class Program

{

    public static void Main()

    {

        int N = 30;

        int [] mass = new int [N];

        int i, x, y;

        x = 0;

        y = 0;

        float s;

        Random r = new Random();

         for (i=0; i<N; i++)

        {

            mass[i] = r.Next(1,6);

            Console.WriteLine(mass[i]); 

        }

        for (i = 0; i<N; i++)

        {

            if ( mass[i] > 3 )

            {

                x++; 

                y = y + mass[i];

            }

        }

        s = y / (float)x;

        Console.WriteLine ( s);

    } 

}