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    "https://leetcode.com/problems/minimum-distance-between-bst-nodes\n",
    "\n",
    "\n",
    "Runtime: 12 ms, faster than 53.07% of C++ online submissions for Minimum Distance Between BST Nodes.\n",
    "Memory Usage: 15.1 MB, less than 5.04% of C++ online submissions for Minimum Distance Between BST Nodes.\n",
    "\n",
    "\n",
    "```c++\n",
    "class Solution {\n",
    "public:\n",
    "    vector<int> values;\n",
    "    int min_distance;\n",
    "    void travel(TreeNode* node) {\n",
    "        if (node != nullptr) {\n",
    "            int value = node->val;\n",
    "            if (values.size()) {\n",
    "                vector<int> temp_list;\n",
    "                for (auto x : values) {\n",
    "                    temp_list.push_back(abs(x-value));\n",
    "                }\n",
    "                int new_distance = *min_element(temp_list.begin(), temp_list.end());\n",
    "                if (new_distance < min_distance) {\n",
    "                    min_distance = new_distance;\n",
    "                }\n",
    "            }\n",
    "            values.push_back(value);\n",
    "            travel(node->right);\n",
    "            travel(node->left);\n",
    "        }\n",
    "    }\n",
    "    int minDiffInBST(TreeNode* root) {\n",
    "        //8:05\n",
    "        values.clear();\n",
    "        min_distance = INT8_MAX;\n",
    "        travel(root);\n",
    "        return min_distance;\n",
    "        //8:11\n",
    "    }\n",
    "};\n",
    "```"
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