using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Main Menu \n1. Set Size \n2. Draw Square \n3. Draw Triangle \n4. Draw Rhombus \n5. Exit");

        Console.WriteLine();

        Console.WriteLine("Menu :");

        int menu = Convert.ToInt32(Console.ReadLine());

        while(menu != 5)

        {   

            if (menu == 1)

            {

                Console.WriteLine();

                Console.WriteLine("Input Size :");

                int size = Convert.ToInt32(Console.ReadLine());

                while(size <2)

                {

                    if (size < 2)

                    {

                        Console.WriteLine("Invalid Size");

                        Console.WriteLine("Input Size :");

                        int size2 = Convert.ToInt32(Console.ReadLine());

                        if (size2 >1)

                        {

                            Console.WriteLine("Main Menu \n1. Set Size \n2. Draw Square \n3. Draw Triangle \n4. Draw Rhombus \n5. Exit");

                            Console.WriteLine("Menu :");

                            int menu1 = Convert.ToInt32(Console.ReadLine());

                        }

                    }

                }   

                while (size > 1)

                {

                    if (size > 1)

                    {

                        Console.WriteLine();

                        Console.WriteLine("Main Menu \n1. Set Size \n2. Draw Square \n3. Draw Triangle \n4. Draw Rhombus \n5. Exit");

                        Console.WriteLine();

                        Console.WriteLine("Menu :");

                        int menu2 = Convert.ToInt32(Console.ReadLine());

                        Console.WriteLine();

                        if (menu2 == 2)

                        {

                            for(int i = 1; i <= size; i++)

                            {

                                for(int j = 1; j <= size; j++)

                                {

                                    Console.Write(" ");

                                    if (i == 1 || i == size || j == 1 || j == size )

                                    {

                                        Console.Write("*");

                                    }

                                    else

                                    {

                                        Console.Write(" ");

                                    }

                                }

                                    Console.WriteLine();

                            }   

                        }

                    }

                }   

            }

            if (menu == 2)

            {

                for(int i = 1; i <= size; i++)

                {

                    for(int j = 1; j <= size; j++)

                    {

                        Console.Write(" ");

                        if (i == 1 || i == size || j == 1 || j == size )

                        {

                            Console.Write("*");

                        }

                        else

                        {

                            Console.Write(" ");

                        }

                    }

                    Console.WriteLine();

                }   

            }

            if (menu == 5)

            {

                Console.WriteLine();

            }   

        }   

    }

}