using System;

namespace No222{
    public class Program{
        public static void Main(string[] args){
            var input = Console.ReadLine();

            var split = 0;
            for(var i = 1; i < input.Length; i++){
                if(!char.IsDigit(input[i])){
                    split = i;
                    break;
                }
            }

            var x = int.Parse(input.Substring(0, split));
            var op = input[split];
            var y = int.Parse(input.Substring(split + 1));

            if(op == '+') Console.WriteLine(x - y);
            if(op == '-') Console.WriteLine(x + y);
        }
    }
}