using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}double y,a=-5.7 ,b=12.4;

            int x;

        y=Math.Round(12.5);

        Console.WriteLine("y={0}",y);

        y=Math.Round(12.51);

        Console.WriteLine("y={0}",y);

        y=Math.Round(a+b);

        Console.WriteLine("y={0}",y);

        x=(int) (Math.Round(a));

        Console.WriteLine("x={0}",x);

        x=(int) (Math.Round(a+0.5));

        Console.WriteLine("x={0}",x);