using System;

public class Program

{

    public static void Main()

    {

        int a , b ;

        Console.WriteLine("adad aval = ");

        a=Convert.ToInt32(System.Console.ReadLine());

        Console.WriteLine("adad dovom = ");

        b=Convert.ToInt32(System.Console.ReadLine());

        int c = a + b;

        int d = a - b;

        int e = a / b;

        int f = a * b;

        char g;

        Console.WriteLine("lotfan amaliat ra vared kon ");

        g = Convert.ToChar(Console.ReadLine());

        if( g == '+')

        {

         Console.WriteLine(c);              

        }

        else if( g == '-')

        {

         Console.WriteLine(d);              

        }

        else if( g == '*')

        {

         Console.WriteLine(f);              

        }

        else if( g == '/')

        {

         Console.WriteLine(e);              

        }

    }

}