import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;

class Main {
	static PrintWriter out = new PrintWriter(System.out);
	static String str;

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str = br.readLine();
		br.close();

		int index = str.indexOf("+");
		if (index > 0) {
			System.out.println(Integer.parseInt(str.substring(0, index)) - Integer.parseInt(str.substring(index + 1)));
		}else{
			index=str.indexOf("-");
			System.out.println(Integer.parseInt(str.substring(0, index)) + Integer.parseInt(str.substring(index + 1)));
		}
	}
}