import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.*;
public class Main {

	 public static void main(String[] args) {
	      BufferedReader stdReader =new BufferedReader(new InputStreamReader(System.in));
	      try {
	    	  String line = stdReader.readLine();
	    	  if(line.charAt(0)=='+'){
	    		  line = line.substring(1,line.length());
	    	  }
	    	  Pattern pattern = Pattern.compile("\\+");
	    	  Matcher matcher = pattern.matcher(line);
	    	  if(matcher.find()){
	    		  String[] temps = line.split("\\+");
	    		  System.out.println(Integer.parseInt(temps[0])-Integer.parseInt(temps[1]));
	    	  }else{
	    		  String[] temps = line.split("\\-");
	    		  System.out.println(Integer.parseInt(temps[0])+Integer.parseInt(temps[1]));
	    	  }
	      } catch (IOException e) {
			e.printStackTrace();
	      }
	}
}