public class Tsp {
    int numCities = 0;
    Database db = new Database();
    Vector<String> cityNames = new Vector<String>;
    
    int readCity(Scanner sc) {
	String word = sc.next();
	Integer city = db.find(word);
	if(city == null) {
	    db.add(word,numCities);
	    cityNames.add(city);
	    return numCities++;
	}
	else 
	    return city.intValue();
    }
}