import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

public class AddServlet extends HttpServlet {

    protected void doGet(
        HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException
    {
        response.setContentType("text/xml");
        PrintWriter out = response.getWriter();
        String path = request.getPathInfo();
        path = path.substring(1);
        String[] args = path.split("/");
        int sum = 0;
        for( int i = 0 ; i < args.length; i++ ) {
            sum += Integer.parseInt( args[i] );
        }
        out.println( "<?xml version='1.0'?>" );
        out.println( "<add-result>" + sum + "</add-result>" );
    }
}