static void Main()
        {
            OurHashedSet <int> set = new OurHashedSet <int>(new int[] { 111, 1, 3, 5, 7, 12 });

            Console.WriteLine(set.Count);

            set.Add(122);


            Console.WriteLine(set.Find(122));
            Console.WriteLine(set.Count);
            set.Remove(122);
            Console.WriteLine(set.Count);

            foreach (var item in set)
            {
                Console.WriteLine(item);
            }

            OurHashedSet <int> newSet = new OurHashedSet <int>(new int[] { 1, 3, 5, 7, 12, 2222 });

            newSet.UnionWhith(set);
            foreach (var item in newSet)
            {
                Console.WriteLine(item);
            }
        }