diff --git a/linked_lists/find_loop_start/find_loop_start_solution.ipynb b/linked_lists/find_loop_start/find_loop_start_solution.ipynb
index b687bb7..102d927 100644
--- a/linked_lists/find_loop_start/find_loop_start_solution.ipynb
+++ b/linked_lists/find_loop_start/find_loop_start_solution.ipynb
@@ -60,12 +60,12 @@
    "source": [
     "## Algorithm\n",
     "\n",
-    "* Use two pointers i, j, initialized to the head\n",
-    "* Increment i and j until they meet\n",
-    "    * j is incremented twice as fast as i\n",
-    "        * If j's next is None, we do not have a circular list\n",
-    "* When i and j meet, move j to the head\n",
-    "* Increment i and j one node at a time until they meet\n",
+    "* Use two references `slow`, `fast`, initialized to the `head`\n",
+    "* Increment `slow` and `fast` until they meet\n",
+    "    * `fast` is incremented twice as fast as `slow`\n",
+    "        * If `fast.next` is `None`, we do not have a circular list\n",
+    "* When `slow` and `fast` meet, move `slow` to the `head`\n",
+    "* Increment `slow` and `fast` one node at a time until they meet\n",
     "* Where they meet is the start of the loop\n",
     "\n",
     "Complexity:\n",
@@ -103,29 +103,23 @@
     "\n",
     "    def find_loop_start(self):\n",
     "        if self.head is None or self.head.next is None:\n",
-    "            return\n",
-    "        i = self.head\n",
-    "        j = self.head\n",
-    "        i = i.next\n",
-    "        j = j.next.next\n",
-    "\n",
-    "        # Increment i and j until they meet\n",
-    "        # j is incremented twice as fast as i\n",
-    "        while j != i:\n",
-    "            i = i.next\n",
-    "            if j is None or j.next is None:\n",
-    "                return\n",
-    "            j = j.next.next\n",
-    "\n",
-    "        # When i and j meet, move j to the head\n",
-    "        j = self.head\n",
-    "\n",
-    "        # Increment i and j one node at a time until\n",
-    "        # they meet, which is the start of the loop\n",
-    "        while j != i:\n",
-    "            i = i.next\n",
-    "            j = j.next\n",
-    "        return i.data"
+    "            return None\n",
+    "        slow = self.head\n",
+    "        fast = self.head\n",
+    "        while fast.next is not None:\n",
+    "            slow = slow.next\n",
+    "            fast = fast.next.next\n",
+    "            if fast is None:\n",
+    "                return None\n",
+    "            if slow.data == fast.data:\n",
+    "                break\n",
+    "        slow = self.head\n",
+    "        while slow.data != fast.data:\n",
+    "            slow = slow.next\n",
+    "            fast = fast.next\n",
+    "            if fast is None:\n",
+    "                return None\n",
+    "        return slow.data"
    ]
   },
   {
@@ -230,21 +224,21 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "pygments_lexer": "ipython3",
+   "version": "3.4.3"
   }
  },
  "nbformat": 4,