RhombusStars

using System;

 class Program
 {
     static void Main(string[] args)
     {
        int n = int.Parse(Console.ReadLine());

        for (int row = 1; row <= n; row++)
        {
            for (int col = 1; col <= n - row; col++)
            {
                Console.Write(" ");
            }
            Console.Write("*");
            for (int col = 1; col <  row; col++)
            {
                Console.Write(" *");
            }
            Console.WriteLine();
        }
        for (int row = n - 2; row >= 0; row--)
        {
            for (int col = 1; col < n - row; col++)
            {
                Console.Write(" ");
            }
            Console.Write("*");
            for (int col = 1; col <= row; col++)
            {
                Console.Write(" *");
            }
            Console.WriteLine();
        }
    }
 }