using System;

public class Program

{

    public static void Main()

    {

        int total=0;

        int i;

        double mean=0.0;

        int[]Pollu=new int[4];

        for(i=0;i<=3;i++)

        {

        Console.WriteLine("Enter reading between(1-10):{0}",i+1);

        Pollu[i]= Convert.ToInt32(Console.ReadLine());

            while(Pollu[i] < 1 || Pollu[i] > 10)

            {

                Console.WriteLine("Enter reading:{0}",i+1);

                Pollu[i]= Convert.ToInt32(Console.ReadLine());

            }

        }

            for(i=0;i<=3;i++)

            {

                 total=total+Pollu[i];

            }

            mean=total/4;

           Console.WriteLine(total);

           Console.WriteLine(mean);

        int smallnum = Pollu[0];

        i =0;

        while(i<=3)

        {

            if (smallnum> Pollu[i])

            {

                smallnum = Pollu[i];

            }

            i=i+1;

        }

        Console.WriteLine(smallnum);

        int largenum = Pollu[0];

        i =1;

        while(i<=3)

        {

            if (largenum< Pollu[i])

            {

                largenum = Pollu[i];

            }

            i=i+1;

        }

        Console.WriteLine(largenum);

    }

}