using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        string p;

        double x= (double)2/(double)3;

        double y = 2/3;

        double z = (double)2/3;

        double t = 2/(double)3;

        Console.WriteLine(x);

        Console.WriteLine(y);

        Console.WriteLine(z);

        Console.WriteLine(t);

        Console.WriteLine(Math.Ceiling(x));

        Console.WriteLine(Math.Ceiling(y));

        Console.WriteLine(Math.Ceiling(z));

        Console.WriteLine(Math.Ceiling(t));

        p = Console.ReadLine();

    }

}