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    "https://leetcode.com/problems/linked-list-components\n",
    "\n",
    "\n",
    "Runtime: 116 ms, faster than 43.10% of Python3 online submissions for Linked List Components.\n",
    "Memory Usage: 18.9 MB, less than 33.18% of Python3 online submissions for Linked List Components.\n",
    "\n",
    "\n",
    "```python\n",
    "class Solution:\n",
    "    def numComponents(self, head: ListNode, G: List[int]) -> int:\n",
    "        subSet = set(G)\n",
    "        components = [[]]\n",
    "        node = head\n",
    "        while node:\n",
    "            val = node.val\n",
    "            if val in subSet:\n",
    "                components[-1].append(val)\n",
    "            else:\n",
    "                components.append([])\n",
    "            node = node.next\n",
    "        counting = 0\n",
    "        for c in components:\n",
    "            if len(c) != 0:\n",
    "                counting += 1\n",
    "        return counting\n",
    "```"
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