using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("insert a number");

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

        double othernum = 0;

        double count = 0;

        while ((num - othernum) > 0)

        {

            count++;

            othernum=num;

            Console.WriteLine("insert a number");

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

        }

        if (num==0)

            Console.WriteLine("finish");

        else

            Console.WriteLine("not an ascending series");

    }

}