using System;

public class Program

{

    public static void Main()

    {

            Console.Write("Enter row number: ");

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

            for(int i = 1;i<=ast;i++){

                for(int ii = 1;ii<=i;ii++){

                    Console.Write("* ");

                }

                Console.WriteLine("");

            }

    }

}