diff --git a/bit_manipulation/flip_bit/flip_bit_solution.ipynb b/bit_manipulation/flip_bit/flip_bit_solution.ipynb
index 6b7889f..aad317f 100644
--- a/bit_manipulation/flip_bit/flip_bit_solution.ipynb
+++ b/bit_manipulation/flip_bit/flip_bit_solution.ipynb
@@ -118,62 +118,28 @@
    "outputs": [],
    "source": [
     "class Bits(object):\n",
-    "\n",
     "    MAX_BITS = 32\n",
     "    \n",
-    "    def _build_seen_list(self, num):\n",
-    "        seen = []\n",
-    "        looking_for = 0\n",
-    "        count = 0\n",
-    "        for _ in range(self.MAX_BITS):\n",
-    "            if num & 1 != looking_for:\n",
-    "                seen.append(count)\n",
-    "                looking_for = not looking_for\n",
-    "                count = 0\n",
-    "            count += 1\n",
-    "            num >>= 1\n",
-    "        seen.append(count)\n",
-    "        return seen\n",
-    "    \n",
     "    def flip_bit(self, num):\n",
     "        if num is None:\n",
-    "            raise TypeError('num cannot be None')\n",
-    "        if num == -1:\n",
-    "            return self.MAX_BITS\n",
-    "        if num == 0:\n",
-    "            return 1\n",
-    "        seen = self._build_seen_list(num)\n",
-    "        max_result = 0\n",
-    "        looking_for = 0\n",
-    "        for index, count in enumerate(seen):\n",
-    "            result = 0\n",
-    "            # Only look for zeroes\n",
-    "            if looking_for == 1:\n",
-    "                looking_for = not looking_for\n",
-    "                continue\n",
-    "            # First iteration, take trailing zeroes\n",
-    "            # or trailing ones into account\n",
-    "            if index == 0:\n",
-    "                if count != 0:\n",
-    "                    # Trailing zeroes\n",
-    "                    try:\n",
-    "                        result = seen[index + 1] + 1\n",
-    "                    except IndexError:\n",
-    "                        result = 1\n",
-    "            # Last iteration\n",
-    "            elif index == len(seen) - 1:\n",
-    "                result = 1 + seen[index - 1]\n",
+    "            raise TypeError\n",
+    "        run1 = 0\n",
+    "        run2 = 0\n",
+    "        best = 0\n",
+    "        \n",
+    "        as_bin = format(num if num >= 0 else (1 << 32) + num, '032b')\n",
+    "            \n",
+    "        for c in as_bin:\n",
+    "            if c == '1':\n",
+    "                run1 += 1\n",
+    "                run2 += 1\n",
     "            else:\n",
-    "                # One zero\n",
-    "                if count == 1:\n",
-    "                    result = seen[index + 1] + seen[index - 1] + 1\n",
-    "                # Multiple zeroes\n",
-    "                else:\n",
-    "                    result = max(seen[index + 1], seen[index - 1]) + 1\n",
-    "            if result > max_result:\n",
-    "                max_result = result\n",
-    "            looking_for = not looking_for\n",
-    "        return max_result"
+    "                if run2 > best:\n",
+    "                    best = run2\n",
+    "                run2 = run1 + 1\n",
+    "                run1 = 0\n",
+    "        return max(run2, best)\n",
+    "    "
    ]
   },
   {