using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Аритметични операции");

        int a = 5;

        int b = 10;

        int sum= a + b;

        Console.WriteLine(sum);

        Console.WriteLine("..............");

        Console.Write("c=");

        int c = int.Parse(Console.ReadLine());

        Console.Write("d=");

        int d = int.Parse(Console.ReadLine());

        int pr = c * d;

        Console.WriteLine("Pr="+pr);

    }

}