      "    * Print the node's value\n",
      "    \n",
      "Complexity:\n",
      "* Time: O(n)\n",
      "* Space: In-place"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
 
</s> remove     "* Space: In-place\n",
 </s> add     "* Space: O(1)\n", </s> remove     "* Space: In-place\n",
 </s> add     "* Space: O(1)\n", </s> remove     "* Space: In-place\n",
 </s> add     "* Space: O(1)\n", </s> remove     "* Space: O(1), a new node is added\n",
 </s> add     "* Space: O(1)\n", </s> remove     "* Space: O(1), a new node is added\n",
 </s> add     "* Space: O(1)\n",
    "* Space: O(1)"
      "    * Print the node's value\n",
      "    \n",
      "Complexity:\n",
      "* Time: O(n)\n",
    "* Space: O(1)"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
keep keep keep keep replace keep keep keep keep keep
 tweaked linked list challenge algorithm discussion. 
linked_lists/linked_list/linked_list_solution.ipynb