public int getImportance(List<Employee> employees, int id) {

        Map<Integer,Employee> map = new HashMap<>();

        for (int i = 0; i < employees.size(); i++) {

            Employee temp = employees.get(i);

            map.put(temp.id,temp);

        }

        return helper(map,id);

    }

    public int helper(Map<Integer,Employee> map, int id)

    {

        Employee cur = map.get(id);

        List<Integer> sub = cur.subordinates;

        int res = cur.importance;

        for (int i = 0; i < sub.size(); i++) {

            res += helper(map,sub.get(i));

        }

        return res;

    }