import java.util.HashMap;

public class LockerManager {

    private HashMap<String, Integer> lockers;

    public LockerManager(){
        lockers = new HashMap<>();
    }

    public boolean assignLocker(String id, int lockerNum){

        //determine if the student already has a locker
        if(lockers.containsKey(id)){
            return false;
        }else if(lockers.containsValue(lockerNum)){
            return false;
        }else{
            lockers.put(id, lockerNum);
            return true;
        }
    }

    public HashMap<String, Integer> getLockers(){
        return lockers;
    }



}