using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        double a = 0;

        Console.WriteLine(Math.Log(a));

        Console.WriteLine(Math.Cbrt(125));

        Console.WriteLine(Math.Truncate(200000.999999));

        double e = 1000000000000000;

        int b = 052;

        double c = -55555;

        Console.WriteLine(Math.Sign(e));

    }

}