using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("The balance =");

        double balance=Convert.ToInt32(Console.ReadLine());

         Console.WriteLine("The rate1 =");

        double rate1=Convert.ToDouble(Console.ReadLine());

         Console.WriteLine();

         Console.WriteLine("The rate2 =");

        double rate2=Convert.ToDouble(Console.ReadLine());

        double simple_benifie_periode;

        double composed_benifie_periode;

        //Simple bemifite=balance*rate2*years

        //to get the double the balance the benifite must be equivalent to the balance

        //this lead to:balance=balance*rate2*years

        //this lead to:

    simple_benifie_periode=1/rate2;

        Console.WriteLine("the simple_benifie_periode =" + simple_benifie_periode );

        //composed benifite=balance*((1+rate1)power(composed_benifie_periode)-1)

        composed_benifie_periode=Math.Log(2)/Math.Log(rate1+1);

        Console.WriteLine("the composed_benifie_periode =" + composed_benifie_periode );

        }

}

​