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   "source": [
    "https://leetcode.com/problems/linked-list-cycle-ii\n",
    "\n",
    "\n",
    "Runtime: 56 ms, faster than 8.10% of Go online submissions for Linked List Cycle II.\n",
    "Memory Usage: 4.8 MB, less than 28.35% of Go online submissions for Linked List Cycle II.\n",
    "\n",
    "\n",
    "```go\n",
    "func detectCycle(head *ListNode) *ListNode {\n",
    "\t//6:36\n",
    "\tok := false\n",
    "\tl := make([]*ListNode, 0)\n",
    "\tindex := 0\n",
    "\tnode := head\n",
    "\tfor node != nil {\n",
    "\t\tok = false\n",
    "\t\tfor _, n := range l {\n",
    "\t\t\tif n == node {\n",
    "\t\t\t\tok = true\n",
    "\t\t\t\tbreak\n",
    "\t\t\t}\n",
    "\t\t}\n",
    "\t\tl = append(l, node)\n",
    "\t\tif ok {\n",
    "\t\t\treturn l[index]\n",
    "\t\t}\n",
    "\t\tnode = node.Next\n",
    "\t\tindex += 1\n",
    "\t}\n",
    "\treturn nil\n",
    "\t//6:38\n",
    "}\n",
    "```"
   ]
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