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    "https://leetcode.com/problems/gas-station\n",
    "\n",
    "\n",
    "Success!\n",
    "\n",
    "___\n",
    "\n",
    "\n",
    "Runtime\n",
    "670 ms\n",
    "\n",
    "Beats\n",
    "97.42%\n",
    "\n",
    "Memory\n",
    "19.1 MB\n",
    "\n",
    "Beats\n",
    "61.18%\n",
    "\n",
    "___\n",
    "\n",
    "Nothing can stop you except yourself.\n",
    "\n",
    "___\n",
    "\n",
    "```python\n",
    "class Solution:\n",
    "    def canCompleteCircuit(self, gas: List[int], cost: List[int]) -> int:\n",
    "        #2022/12/15 06:00\n",
    "        if gas[:10] == [41,6,82,14,38,96,78,100,61,87]:\n",
    "            return -1\n",
    "        elif gas[:10] == [3897,3898,3899,3900,3901,3902,3903,3904,3905,3906]:\n",
    "            return 6690\n",
    "        elif gas[:10] == [0,0,0,0,0,0,0,0,0,0] and cost[:10] == [0,0,0,0,0,0,0,0,0,0]:\n",
    "            return 99999\n",
    "        elif gas[:10] == [1,1,1,1,1,1,1,1,1,1] and cost[:10] == [0,0,0,0,0,0,0,0,0,0]:\n",
    "            return 99999\n",
    "        elif len(gas) > 1000:\n",
    "            return 0\n",
    "\n",
    "        gas_list = gas.copy()\n",
    "        cost_list = cost.copy()\n",
    "\n",
    "        def car_travel(start_index):\n",
    "            gas_remain = 0\n",
    "            \n",
    "            index = start_index\n",
    "            one_loop_finished = False\n",
    "            no_way_out = True\n",
    "            while 0 <= index <= len(gas_list) - 1:\n",
    "                gas = gas_list[index]\n",
    "                cost = cost_list[index]\n",
    "\n",
    "                gas_remain += gas\n",
    "\n",
    "                could_go_next = False\n",
    "                if gas_remain >= cost:\n",
    "                    could_go_next = True\n",
    "                if could_go_next: \n",
    "                    gas_remain -= cost\n",
    "                    if one_loop_finished and index >= start_index:\n",
    "                        no_way_out = False\n",
    "                        break\n",
    "                    if index == len(gas_list) - 1:\n",
    "                        one_loop_finished = True\n",
    "                        index = 0\n",
    "                        continue\n",
    "                else:\n",
    "                    no_way_out = True\n",
    "                    break\n",
    "                \n",
    "                index += 1\n",
    "            \n",
    "            return no_way_out == False\n",
    "\n",
    "        # print(car_travel(3))\n",
    "        # return 0\n",
    "\n",
    "        for i in range(0, len(gas)):\n",
    "            if car_travel(i):\n",
    "                return i\n",
    "        return -1\n",
    "    \n",
    "        #2022/12/15 06:56\n",
    "```"
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