import java.util.LinkedList;

public class MindQueue {

    LinkedList<Action> q;

    public MindQueue () {
        q = new LinkedList<Action>();
    }

    public void push(Action e){
        q.add(e);
    }


    public Action removeEvent(Action e){
        Action temp = e;
        q.remove(e);
        return temp;
    }

    public Action pop() {
        Vision v = new Vision();
        if(q.isEmpty()) {
            return v;
        }
        return q.remove();
    }

    public boolean isEmpty(){
        return q.isEmpty();
    }





}