using System;

public class Program

{

    public static void Main()

    {

            Console.WriteLine("Enter number of rows: ");

            int x = Int32.Parse(Console.ReadLine());

            int counter = 1;

            while (counter <= x)

            {   

                int stars = 0;

                while (stars < counter)

                {

                Console.Write("*");

                stars++;

                }

                counter++;

                Console.WriteLine("");

            }

    }

}