/*using System;

​

class kimcuong

{

    static void Main()

    {

        Console.Write("Nhap so dong (1/2 chieu cao kim cuong): ");

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

​

        // Phần trên của kim cương

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

        {

            Console.Write(new string(' ', n - i));

            Console.WriteLine(new string('*', 2 * i - 1));//

        }

​

        // Phần dưới của kim cương

        for (int i = n - 1; i > 0; i--)

        {

            Console.Write(new string(' ', n - i));

            Console.WriteLine(new string('*', 2 * i - 1));

        }

    }

}

*/

​

/*

using System;

class Program

{

    static void Main()

    {

        Console.Write("Nhap so dong (1/2 chieu cao mui ten): ");

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

​

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

        {

            Console.WriteLine(string.Join(" ", new string('*', i)));

        }

        for (int i = n - 1; i > 0; i--)

        {

            Console.WriteLine(string.Join(" ", new string('*', i)));

        }

    }

}

*/

​

/*

using System;

​

class Program

{

    static void InNo(int n)

    {

        for (int i = 0; i < n; i++)

        {

            Console.Write(new string('*', i + 1) + new string(' ', (n - i - 1) * 2) + new string('*', i + 1));

            Console.WriteLine();

        }

​

        for (int i = n - 2; i >= 0; i--)

        {

            Console.Write(new string('*', i + 1) + new string(' ', (n - i - 1) * 2) + new string('*', i + 1));

            Console.WriteLine();

        }

    }

​

    static void Main()

    {

        Console.Write("Nhap so dong (1/2 chieu cao no): ");

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

        InNo(n);

    }

}

*/

/*

using System;

​

class Program

{

    static void InNo(int n)

    {

        for (int i = 0; i < n; i++)

        {

            for (int j = 0; j <= i; j++) 

                Console.Write('*');  

            for (int j = 0; j < (n - i - 1) * 2; j++) 

                Console.Write(' ');  

            for (int j = 0; j <= i; j++) 

                Console.Write('*');  

            Console.WriteLine();

        }

​

        for (int i = n - 2; i >= 0; i--)

        {

            for (int j = 0; j <= i; j++)

                Console.Write('*');  

            for (int j = 0; j < (n - i - 1) * 2; j++)

                Console.Write(' ');  

            for (int j = 0; j <= i; j++)

                Console.Write('*');  

            Console.WriteLine();

        }

    }

​

    static void Main()

    {

        Console.Write("Nhap so dong (1/2 chieu cao no): ");

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

        InNo(n);

    }

}

*/

​

​

/*

using System;

​

class kimtuthapfull

{

     static void Main()

    {

        Console.Write("nhap so tang");

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

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

         {

             Console.WriteLine(new string(' ', n- i));

             Console.WriteLine(new string('*', i));

         }

         for (int i = n-1; i < n; i--)

         { 

             Console.WriteLine(new string(' ', n- i));

             Console.WriteLine(new string('*', i));

         }

     }

}

​

*/

​

/*

using System;

​

class Program

{

    static void InNo(int n)

    {

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

        {

            Console.WriteLine(new string('*', i ) + new string(' ', (n - i ) * 2) + new string('*', i ));

        }

​

        for (int i = n - 1; i >= 0; i--)

        {

            Console.WriteLine(new string('*', i ) + new string(' ', (n - i ) * 2) + new string('*', i ));

        }

    }

​

    static void Main()

    {

        Console.Write("Nhap so dong (1/2 chieu cao no): ");

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

        InNo(n); 

    }

}

*/

​

using System;

​

class Program

{

    static void InHinh(int n)

    {

        for (int i = 0; i < n; i++)

        {

            Console.Write(new string(' ', n - i - 1) + new string('*', 2 * i + 1) + new string(' ', n - i - 1) + "  ");

            Console.Write(new string(' ', i) + new string('*', n - i) + new string(' ', i) + "  ");

            Console.WriteLine(new string('*', i + 1) + new string(' ', 2 * (n - i - 1)) + new string('*', i + 1));

        }

​

        for (int i = n - 2; i >= 0; i--)

        {

            Console.Write(new string(' ', n - i - 1) + new string('*', 2 * i + 1) + new string(' ', n - i - 1) + "  ");

            Console.Write(new string(' ', i) + new string('*', n - i) + new string(' ', i) + "  ");

            Console.WriteLine(new string('*', i + 1) + new string(' ', 2 * (n - i - 1)) + new string('*', i + 1));

        }

    }

​

    static void Main()

    {

        Console.Write("Nhập số dòng (1/2 chiều cao): ");

        if (int.TryParse(Console.ReadLine(), out int n) && n > 0)

            InHinh(n);

        else

            Console.WriteLine("Vui lòng nhập số nguyên dương hợp lệ.");

    }

}

​