using System;

public class Program

{

    private static bool DrawTriangle(int n) {

        if (n <= 0)

             return false;

​

        long m = (long)((-1.0 + Math.Sqrt(1.0 + 8.0 * n)) / 2.0);

        long residue = n - m * (m + 1) / 2;

​

        for (int i = 1; i <= m; ++i)

            Console.WriteLine(new string('*', i));

        if (residue > 0)

            Console.WriteLine(new string('*', (int)residue));

​

        return true;

    }

    public static void Main()

    {

        int p = 8;

        if (!DrawTriangle(p))

           Console.WriteLine("Not a positive number");

    }

}