using System;

public class Program

{

    public static void Main()

    {

        int number = 0, counter = 0, sum = 0;

        bool Pnum = true;

        string answer = "";

        do

        {

        Console. Write ("Enter number: ");

        number = int. Parse (Console. ReadLine());

        if (number<=1)

         {

             Console.WriteLine("Invalid Input");

         }

        else

            {

            for (int a = 1; a<=number ;a++)

                {

                for (int b = 2; b<=number ; b++)

                    {

                        if (a !=b && a % b == 0)

                        {

                            Pnum = false;

                            break;

                        }

                    }

                if (Pnum)

            {

                Console.WriteLine(a + " is a prime number");

                sum = ( sum + a);

                counter++;

            }

                else

            {

                    Console. WriteLine (a + " is a composite number");

                    sum = (sum + a);

                    counter ++;

            }

            Pnum = true;

        }

        Console. WriteLine("Number of prime numbers: " + counter);

        Console. WriteLine("Summation of all prime numbers: " + sum);

        }   

        Console. WriteLine ("Do you want to contine the program? [Y/N] ");

        answer = Console. ReadLine ();

        }

            while ((answer == "Y") || (answer == "y"));

            Console. WriteLine ("Nice Try!");

        Console.ReadLine();

    }

}