using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Insert a number");

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

        int count = 1;

        while (num >= 1) //X num times

        {

            count = 1;

            while (count <= num)

            {

                Console.Write("*");

                count++;

            }

​

            num--;

            Console.WriteLine();

        }

    }

}