// Complete the freqQuery function below.
    static List<Integer> freqQuery(List<List<Integer>> queries) {
        List<Integer> result = new ArrayList<>();
        List<Integer> data = new ArrayList<>();
        HashMap<Integer, Function<Integer, Boolean>> mapa = new HashMap<>();
        mapa.put(1, o -> data.add(o));
        mapa.put(2, o -> data.remove(o));
        mapa.put(3, o -> {
        Map<Integer, Long> counts = data.stream().collect(Collectors.groupingBy(e -> e, Collectors.counting()));
return result.add(counts.containsValue(new Long(o))? 1:0);
        });
        queries.forEach(integers -> {
            mapa.get(integers.get(0)).apply(integers.get(1));
        });
        return  result;
    }