namespace ConsoleApplication3
{
    using System;
    class Calculator
    {
        static void Main(string[] args)
        {
            int x = int.Parse(Console.ReadLine());
            char function = Console.ReadKey().KeyChar;

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

            switch(function)
            {
                case '+': Console.WriteLine(x + y);
                    break;
                case '-': Console.WriteLine(x - y);
                    break;
                case '*': Console.WriteLine(x * y);
                    break;
                case '/': Console.WriteLine(x / y);
                    break;


                default: Console.WriteLine("Invalid");
                    break;
            }

        }
    }
}