using System;

using System.Collections.Generic;

public class Program

{

    public static decimal myFunction (decimal i)

    {

        return i==0?0: -20 + (10/(1+i)) + 2*(( (decimal)Math.Pow(Decimal.ToDouble(1+i),9))-1)/(i*( (decimal)Math.Pow(Decimal.ToDouble(1+i),9)))*(1/(1+i));

    }

    public static decimal iBulma()

    {

        decimal i=0;

        decimal sonuc = 0;

        decimal last_result = 0;

​

        for(i=0; i<=1 ; i=i+0.01M)

        {

            //i = Math.Round(i,2);

            sonuc = myFunction(i);

            //sonuc = Math.Round(sonuc,2);

             Console.WriteLine($"{sonuc.ToString()}-{i.ToString()}");

            if(sonuc==0){

            last_result=sonuc;

              Console.WriteLine(i.ToString());

            }

        }

        return last_result;

    }

    public static void Main()

    {

        var res = iBulma();

        Console.WriteLine("Hello World");

    }

}