diff --git a/graphs_trees/bst_validate/bst_validate_challenge.ipynb b/graphs_trees/bst_validate/bst_validate_challenge.ipynb
index 2e385cb..c2f46c7 100644
--- a/graphs_trees/bst_validate/bst_validate_challenge.ipynb
+++ b/graphs_trees/bst_validate/bst_validate_challenge.ipynb
@@ -91,50 +91,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# %load ../bst/bst.py\n",
-    "class Node(object):\n",
-    "\n",
-    "    def __init__(self, data):\n",
-    "        self.data = data\n",
-    "        self.left = None\n",
-    "        self.right = None\n",
-    "        self.parent = None\n",
-    "\n",
-    "    def __repr__(self):\n",
-    "        return str(self.data)\n",
-    "\n",
-    "\n",
-    "class Bst(object):\n",
-    "\n",
-    "    def __init__(self, root=None):\n",
-    "        self.root = root\n",
-    "\n",
-    "    def insert(self, data):\n",
-    "        if data is None:\n",
-    "            raise TypeError('data cannot be None')\n",
-    "        if self.root is None:\n",
-    "            self.root = Node(data)\n",
-    "            return self.root\n",
-    "        else:\n",
-    "            return self._insert(self.root, data)\n",
-    "\n",
-    "    def _insert(self, node, data):\n",
-    "        if node is None:\n",
-    "            return Node(data)\n",
-    "        if data <= node.data:\n",
-    "            if node.left is None:\n",
-    "                node.left = self._insert(node.left, data)\n",
-    "                node.left.parent = node\n",
-    "                return node.left\n",
-    "            else:\n",
-    "                return self._insert(node.left, data)\n",
-    "        else:\n",
-    "            if node.right is None:\n",
-    "                node.right = self._insert(node.right, data)\n",
-    "                node.right.parent = node\n",
-    "                return node.right\n",
-    "            else:\n",
-    "                return self._insert(node.right, data)\n"
+    "%run ../bst/bst.py\n",
+    "%load ../bst/bst.py"
    ]
   },
   {
diff --git a/graphs_trees/tree_dfs/dfs_challenge.ipynb b/graphs_trees/tree_dfs/dfs_challenge.ipynb
index 629de37..fec275a 100644
--- a/graphs_trees/tree_dfs/dfs_challenge.ipynb
+++ b/graphs_trees/tree_dfs/dfs_challenge.ipynb
@@ -85,50 +85,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# %load ../bst/bst.py\n",
-    "class Node(object):\n",
-    "\n",
-    "    def __init__(self, data):\n",
-    "        self.data = data\n",
-    "        self.left = None\n",
-    "        self.right = None\n",
-    "        self.parent = None\n",
-    "\n",
-    "    def __repr__(self):\n",
-    "        return str(self.data)\n",
-    "\n",
-    "\n",
-    "class Bst(object):\n",
-    "\n",
-    "    def __init__(self, root=None):\n",
-    "        self.root = root\n",
-    "\n",
-    "    def insert(self, data):\n",
-    "        if data is None:\n",
-    "            raise TypeError('data cannot be None')\n",
-    "        if self.root is None:\n",
-    "            self.root = Node(data)\n",
-    "            return self.root\n",
-    "        else:\n",
-    "            return self._insert(self.root, data)\n",
-    "\n",
-    "    def _insert(self, node, data):\n",
-    "        if node is None:\n",
-    "            return Node(data)\n",
-    "        if data <= node.data:\n",
-    "            if node.left is None:\n",
-    "                node.left = self._insert(node.left, data)\n",
-    "                node.left.parent = node\n",
-    "                return node.left\n",
-    "            else:\n",
-    "                return self._insert(node.left, data)\n",
-    "        else:\n",
-    "            if node.right is None:\n",
-    "                node.right = self._insert(node.right, data)\n",
-    "                node.right.parent = node\n",
-    "                return node.right\n",
-    "            else:\n",
-    "                return self._insert(node.right, data)\n"
+    "%run ../bst/bst.py\n",
+    "%load ../bst/bst.py"
    ]
   },
   {