using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

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

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

        string smetki = Console.ReadLine();

        if(smetki = "+")

        {

        Console.WriteLine(a + b);

        }

        else if(smetki = "-")

        {

        Console.WriteLine(a - b);

        }

        else if(smetki = "*")

        {

        Console.WriteLine(a * b);

        }

        else if(smetki = "/")

        {

        Console.WriteLine(a / b);

        }

    }

}