using System;

using System.Collections.Generic;


using System.Text;



namespace param_parameter
{
delegate int delegate1(int x, int y);
class Program
{

static int F1(int a, int b)
{
return (a + b);
}
static int F2(int a, int b)
{
return (a - b);
}
static void Main(string[] args)
{
delegate1 d = new delegate1(Program.F1);
int r = d(100, 200);
Console.WriteLine(r.ToString());
Console.ReadLine();

}

}

}