using System;

using System.Collections;

public class Program

{

    public static void Main()

    {

        ArrayList inputNumbers = new ArrayList(); 

        while (true) 

        {

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

            if(inputNumber > 0) 

            {

                inputNumbers.Add(inputNumber);

            } 

            else 

            {

                break;

            }

        }

        Console.WriteLine("Aritmetic average: " + AritmeticAverage(inputNumbers));

        Console.WriteLine("Geometric average: " + GeometricAverage(inputNumbers));

    }

    public static double AritmeticAverage(ArrayList numbers)

    {

        double sum = 0.0;

        foreach (double number in numbers)

        {

            sum += number;

        }

        return sum / numbers.Count;

    }

    public static double GeometricAverage(ArrayList numbers)

    {

        double part = 1.0;

        foreach (double number in numbers)

        {

            part *= number;

        }

        return Math.Pow(part, 1.0 / numbers.Count);

    }

}