using System;

public class Program

{

    public delegate void MyDelegate (MyDelegate x, int y);

    public static void Foo(MyDelegate x, int y)

    {

        Console.WriteLine(y);

        if (y == 0)

            return;

        x(x, y - 1);

    }

    public static void Main()

    {

        Foo(Foo, 10);

    }

}