using System.Numerics;

public class Program
{
    public static void Main()
    {

        //BigInteger num = BigInteger.Parse(Console.ReadLine() ?? string.Empty);
        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        //string[] moji = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        string moji = Console.ReadLine() ?? string.Empty;


        int a = 0;
        int b = 0; 
        char g = 'a';
        for(int i = 0; i < moji.Length; i++)
        {
            if(moji[i] == '+' || moji[i] == '-')
            {
                g = moji[i];
                a=int.Parse(moji.Substring(0,i));
                b = int.Parse(moji.Substring(i+1));
            }

        }

        if(g == '+')
        {
            Console.WriteLine(a-b);
        }
        else
        {
            Console.WriteLine(a+b);
        }
    }
}