     ]
    },
    {
     "cell_type": "code",
     "execution_count": null,
     "metadata": {
      "collapsed": false
     },
     "outputs": [],
     "source": [
 
</s> remove    "execution_count": null,
 </s> add    "execution_count": 2, </s> remove    "execution_count": null,
 </s> add    "execution_count": 1, </s> remove    "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
 </s> add    "cell_type": "markdown",
   "metadata": {}, </s> remove    "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
 </s> add    "cell_type": "markdown",
   "metadata": {}, </s> remove    "outputs": [],
 </s> add    "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Overwriting linked_list.py\n"
     ]
    }
   ],
   "execution_count": 3,
     ]
    },
    {
     "cell_type": "code",
   "execution_count": 3,
     "metadata": {
      "collapsed": false
     },
     "outputs": [],
     "source": [
keep keep keep keep replace keep keep keep keep keep
 Reworked notebook: Added more detail to constraints and test cases.  Reworked algorithm discussion, code, and unit test. 
linked-lists/linked-list.ipynb