using System;

public class Program

{

    private static void PrintLineLeft(string value, int screenWidth) {

        Console.WriteLine(value);

    }

​

    private static void PrintLineRight(string value, int screenWidth) {

        if (value.Length >= screenWidth)

            Console.WriteLine(value);

        else

            Console.WriteLine($"{new string(' ', screenWidth - value.Length)}{value}");

    }

​

    private static void PrintLineCenter(string value, int screenWidth) {

        if (value.Length >= screenWidth)

            Console.WriteLine(value);

        else

            Console.WriteLine($"{new string(' ', (screenWidth - value.Length) / 2)}{value}");

    }

    public static void Main()

    {

        int n = 5;

        for (var i = 1; i <= n; i += 2)

            PrintLineCenter(new string('*', i), n);

        for (var i = n - 2; i >= 1; i -= 2)

            PrintLineCenter(new string('*', i), n);

    }

}