      "collapsed": false
     },
     "outputs": [],
     "source": [
      "%run ../utils/captured_output.py"
     ]
    },
    {
     "cell_type": "code",
     "execution_count": 4,
 
</s> remove     "collapsed": false
 </s> add     "collapsed": true </s> remove     "%run ../utils/captured_output.py"
 </s> add     "%run ../utils/results.py" </s> remove     "from __future__ import print_function\n",
 </s> add  </s> remove     "    # TODO: Implement me"
 </s> add     "    # TODO: Implement me\n",
    "    pass"
    "%run ../utils/results.py"
      "collapsed": false
     },
     "outputs": [],
     "source": [
    "%run ../utils/results.py"
     ]
    },
    {
     "cell_type": "code",
     "execution_count": 4,
keep keep keep keep replace keep keep keep keep keep
 Reworked tree dfs unit tests. 
graphs_trees/tree_dfs/dfs_solution.ipynb