using System;

public class Program

{

    public int arrayrange = 0;

    public int[] numberArray = new int[10];

    public int highest, lowest;

    public double squaresum = 0, sumPrimeSquared = 0, EvenCubedSum = 0, sum456 = 0;

    public string getArraySize()

    {

        Console.WriteLine("\nPlease input the size of the Array :");

        var range = Console.ReadLine();

        try{    while (string.IsNullOrEmpty(range) || Int32.Parse(range) < 3 || Int32.Parse(range) > 10)

        {

            Console.WriteLine("Number of items has to be more than 2 and cannot be more than 10! \nPlease input the size of the Array again :");

            range = Console.ReadLine();

        }

        }

        catch (System.FormatException) {

                //Console.WriteLine("Invalid Values Provided.");

        }

        return range;

    }

    public void setArrayItems()

    {

        Console.WriteLine("\nPlease input Array items :");

        for(var i=0;i<arrayrange;i++){

            var item = Console.ReadLine();

            try{    while (string.IsNullOrEmpty(item) || Int32.Parse(item) < 1 || Int32.Parse(item) > 100)

            {

                Console.WriteLine("Please enter numbers only in the range of 1 and 100");

                item = Console.ReadLine();}

                numberArray[i] = Int32.Parse(item);

            }

            catch(System.FormatException) {

                    Console.WriteLine("Invalid Values Provided.");

            }

        }

        Console.WriteLine("\nArray items are as follows :");

        for(var i=0;i<arrayrange;i++){

            Console.WriteLine("{0}",numberArray[i]);

        }

    }

    public void computeSum()

    {

        int sum = 0;

        for(var i=0;i<arrayrange;i++){

            sum += numberArray[i];

        }

        Console.WriteLine("\n1. Sum of Array Items : {0}", sum);

    }

    public void computeHighest()

    {

        highest = numberArray[0];

        for(var i=1;i<arrayrange;i++){

            if(highest < numberArray[i])

                highest = numberArray[i];

        }

        Console.WriteLine("\n2. Highest Array Item : {0}", highest);

    }

    public void computeLowest()

    {

        lowest = numberArray[0];

        for(var i=1;i<arrayrange;i++){

            if(lowest > numberArray[i])

                lowest = numberArray[i];

        }

        Console.WriteLine("\n3. Lowest Array Item : {0}", lowest);

    }

    public void squareHighLow()

    {

        squaresum = Math.Pow(highest,2) + Math.Pow(lowest,2);

        Console.WriteLine("\n4. Sum of squares of (2) and (3): {0}", squaresum);

    }

    public void sumSquarePrime()

    {

        int flag; 

        for(var i=0;i<arrayrange;i++){

            flag = 0;

            for(var j=2;j<=numberArray[i]/2;j++){

                if(numberArray[i] % j == 0)    

                {        

                    flag=1;    

                    break;    

                } 

            }

        if(flag == 0)

            sumPrimeSquared += Math.Pow(numberArray[i],2);

        }

        Console.WriteLine("\n5. Sum of squares of all primes : {0}", sumPrimeSquared);

    }

    public void sumCubeEven()

    {

        for(var i=0;i<arrayrange;i++){

            if(numberArray[i] % 2 == 0)

                EvenCubedSum += Math.Pow(numberArray[i],3);

        }

        Console.WriteLine("\n6. Sum of cubes of all evens : {0}", EvenCubedSum);

    }

    public void getsum456()

    {

        sum456 = squaresum + sumPrimeSquared + EvenCubedSum;

        Console.WriteLine("\n7. Sum of (4), (5) and (6) : {0}", sum456);

    }

    public void sqrroot7()

    {

        Console.WriteLine("\n8. Square root of (7) : {0}", Math.Sqrt(sum456));

    }

    public static void Main()

    {

        Console.WriteLine("## Number Computation ##\n");

        try{

        Program p = new Program();

        p.arrayrange = Int32.Parse(p.getArraySize());

        p.setArrayItems();

        //Console.WriteLine("Range is : {0}",p.arrayrange);

        Console.WriteLine("\n## Computation Results ##\n");

        p.computeSum();

        p.computeHighest();

        p.computeLowest();

        p.squareHighLow();

        p.sumSquarePrime();

        p.sumCubeEven();

        p.getsum456();

        p.sqrroot7();

        }

        catch (System.FormatException) {

                Console.WriteLine("Invalid Values Provided.");

        }

    }

}