using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("input number");

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

        for(int row=0;row<=num;row++)

            {

            for(int column=0;column<row;column++)

                {

                Console.Write("*");

                Console.WriteLine();

                }

            }

    }

}