using System;

public delegate int cal(int x,int y);                   

public class Program

{

    public static int add(int x,int y)

    {

        return x+y;

    }

    public static int multiply(int x,int y)

    {

        return x*y;

    }

    public static void Main()

    {

        cal c1=new cal(add);

        cal c2=new cal(multiply);

        int get=0;

        get=c1(5,5);

        Console.WriteLine(get);

        get=c2(5,5);

        Console.WriteLine(get);

    }

}