public static void Test()
        {
            Solution s    = new Solution();
            var      nums = new int[] { 4, 3, 10, 9, 8 };

            s.MinSubsequence(nums).PrintList();

            nums = new int[] { 4, 4, 7, 6, 7 };
            s.MinSubsequence(nums).PrintList();

            nums = new int[] { 6 };
            s.MinSubsequence(nums).PrintList();
        }