     "source": [
      "## Unit Test"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "*It is important to identify and run through general and edge cases from the [Test Cases](#Test-Cases) section by hand.  You generally will not be asked to write a unit test like what is shown below.*"
     ]
    },
    {
     "cell_type": "code",
     "execution_count": 3,
     "metadata": {
      "collapsed": false
 
</s> remove     "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://bit.ly/code-notes).</i></small>"
 </s> add     "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/coding-challenges).</i></small>"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Solution Notebook" </s> remove     "collapsed": true
 </s> add     "collapsed": false </s> remove     "*Problem statements are often intentionally ambiguous.  Identifying constraints and stating assumptions can help to ensure you code the intended solution.*\n",
 </s> add     "*Problem statements are sometimes ambiguous.  Identifying constraints and stating assumptions can help to ensure you code the intended solution.*\n", </s> remove     "%run linked_list.py"
 </s> add     "%run ../linked_list/linked_list.py" </s> remove     "* Empty list\n",
    "* k is not an integer\n",
    "* k is >= the length of the linked list\n",
    "* One element, k = 0\n",
 </s> add     "* Empty list -> None\n",
    "* k is >= the length of the linked list -> None\n",
    "* One element, k = 0 -> element\n",
     "source": [
      "## Unit Test"
     ]
    },







    {
     "cell_type": "code",
     "execution_count": 3,
     "metadata": {
      "collapsed": false
keep keep keep keep replace replace replace replace replace replace replace keep keep keep keep keep
 Added kth to last element challenge. 
linked_lists/kth_to_last_elem/kth_to_last_elem_solution.ipynb