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    "l = [1,2,3]"
   ]
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   ]
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   "source": [
    "https://leetcode.com/problems/min-stack\n",
    "\n",
    "\n",
    "\n",
    "Runtime: 616 ms, faster than 17.40% of Python3 online submissions for Min Stack.\n",
    "Memory Usage: 18.1 MB, less than 39.35% of Python3 online submissions for Min Stack.\n",
    "\n",
    "\n",
    "\n",
    "```python\n",
    "class MinStack:\n",
    "\n",
    "    def __init__(self):\n",
    "        \"\"\"\n",
    "        initialize your data structure here.\n",
    "        \"\"\"\n",
    "        self.stack = []\n",
    "        \n",
    "\n",
    "    def push(self, x: int) -> None:\n",
    "        self.stack.append(x)\n",
    "\n",
    "    def pop(self) -> None:\n",
    "        r = self.stack[-1]\n",
    "        self.stack = self.stack[:-1]\n",
    "        return r\n",
    "        \n",
    "    def top(self) -> int:\n",
    "        return self.stack[-1]\n",
    "        \n",
    "\n",
    "    def getMin(self) -> int:\n",
    "        return min(self.stack)\n",
    "```\n",
    "\n",
    "\n",
    "spent 6 minutes\n",
    "\n",
    "one shoot"
   ]
  },
  {
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   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
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