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        "question": {
            "questionId": "1079",
            "questionFrontendId": "1022",
            "categoryTitle": "Algorithms",
            "boundTopicId": 3365,
            "title": "Sum of Root To Leaf Binary Numbers",
            "titleSlug": "sum-of-root-to-leaf-binary-numbers",
            "content": "<p>You are given the <code>root</code> of a binary tree where each node has a value <code>0</code> or <code>1</code>. Each root-to-leaf path represents a binary number starting with the most significant bit.</p>\n\n<ul>\n\t<li>For example, if the path is <code>0 -&gt; 1 -&gt; 1 -&gt; 0 -&gt; 1</code>, then this could represent <code>01101</code> in binary, which is <code>13</code>.</li>\n</ul>\n\n<p>For all leaves in the tree, consider the numbers represented by the path from the root to that leaf. Return <em>the sum of these numbers</em>.</p>\n\n<p>The test cases are generated so that the answer fits in a <strong>32-bits</strong> integer.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2019/04/04/sum-of-root-to-leaf-binary-numbers.png\" style=\"width: 400px; height: 263px;\" />\n<pre>\n<strong>Input:</strong> root = [1,0,1,0,1,0,1]\n<strong>Output:</strong> 22\n<strong>Explanation: </strong>(100) + (101) + (110) + (111) = 4 + 5 + 6 + 7 = 22\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> root = [0]\n<strong>Output:</strong> 0\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li>The number of nodes in the tree is in the range <code>[1, 1000]</code>.</li>\n\t<li><code>Node.val</code> is <code>0</code> or <code>1</code>.</li>\n</ul>\n",
            "translatedTitle": "从根到叶的二进制数之和",
            "translatedContent": "<p>给出一棵二叉树，其上每个结点的值都是&nbsp;<code>0</code>&nbsp;或&nbsp;<code>1</code>&nbsp;。每一条从根到叶的路径都代表一个从最高有效位开始的二进制数。</p>\n\n<ul>\n\t<li>例如，如果路径为&nbsp;<code>0 -&gt; 1 -&gt; 1 -&gt; 0 -&gt; 1</code>，那么它表示二进制数&nbsp;<code>01101</code>，也就是&nbsp;<code>13</code>&nbsp;。</li>\n</ul>\n\n<p>对树上的每一片叶子，我们都要找出从根到该叶子的路径所表示的数字。</p>\n\n<p>返回这些数字之和。题目数据保证答案是一个 <strong>32 位 </strong>整数。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2019/04/04/sum-of-root-to-leaf-binary-numbers.png\" />\n<pre>\n<strong>输入：</strong>root = [1,0,1,0,1,0,1]\n<strong>输出：</strong>22\n<strong>解释：</strong>(100) + (101) + (110) + (111) = 4 + 5 + 6 + 7 = 22\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>root = [0]\n<strong>输出：</strong>0\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li>树中的节点数在&nbsp;<code>[1, 1000]</code>&nbsp;范围内</li>\n\t<li><code>Node.val</code>&nbsp;仅为 <code>0</code> 或 <code>1</code>&nbsp;</li>\n</ul>\n",
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                    "code": "/**\n * Definition for a binary tree node.\n * struct TreeNode {\n *     int val;\n *     TreeNode *left;\n *     TreeNode *right;\n *     TreeNode() : val(0), left(nullptr), right(nullptr) {}\n *     TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}\n *     TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}\n * };\n */\nclass Solution {\npublic:\n    int sumRootToLeaf(TreeNode* root) {\n        \n    }\n};",
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                    "code": "/**\n * Definition for a binary tree node.\n * public class TreeNode {\n *     int val;\n *     TreeNode left;\n *     TreeNode right;\n *     TreeNode() {}\n *     TreeNode(int val) { this.val = val; }\n *     TreeNode(int val, TreeNode left, TreeNode right) {\n *         this.val = val;\n *         this.left = left;\n *         this.right = right;\n *     }\n * }\n */\nclass Solution {\n    public int sumRootToLeaf(TreeNode root) {\n        \n    }\n}",
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                {
                    "lang": "Python",
                    "langSlug": "python",
                    "code": "# Definition for a binary tree node.\n# class TreeNode(object):\n#     def __init__(self, val=0, left=None, right=None):\n#         self.val = val\n#         self.left = left\n#         self.right = right\nclass Solution(object):\n    def sumRootToLeaf(self, root):\n        \"\"\"\n        :type root: Optional[TreeNode]\n        :rtype: int\n        \"\"\"\n        ",
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                {
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                    "code": "# Definition for a binary tree node.\n# class TreeNode:\n#     def __init__(self, val=0, left=None, right=None):\n#         self.val = val\n#         self.left = left\n#         self.right = right\nclass Solution:\n    def sumRootToLeaf(self, root: Optional[TreeNode]) -> int:\n        ",
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                    "lang": "C",
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                    "code": "/**\n * Definition for a binary tree node.\n * struct TreeNode {\n *     int val;\n *     struct TreeNode *left;\n *     struct TreeNode *right;\n * };\n */\nint sumRootToLeaf(struct TreeNode* root) {\n    \n}",
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                    "code": "/**\n * Definition for a binary tree node.\n * public class TreeNode {\n *     public int val;\n *     public TreeNode left;\n *     public TreeNode right;\n *     public TreeNode(int val=0, TreeNode left=null, TreeNode right=null) {\n *         this.val = val;\n *         this.left = left;\n *         this.right = right;\n *     }\n * }\n */\npublic class Solution {\n    public int SumRootToLeaf(TreeNode root) {\n        \n    }\n}",
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                    "lang": "JavaScript",
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                    "code": "/**\n * Definition for a binary tree node.\n * function TreeNode(val, left, right) {\n *     this.val = (val===undefined ? 0 : val)\n *     this.left = (left===undefined ? null : left)\n *     this.right = (right===undefined ? null : right)\n * }\n */\n/**\n * @param {TreeNode} root\n * @return {number}\n */\nvar sumRootToLeaf = function(root) {\n    \n};",
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                    "lang": "TypeScript",
                    "langSlug": "typescript",
                    "code": "/**\n * Definition for a binary tree node.\n * class TreeNode {\n *     val: number\n *     left: TreeNode | null\n *     right: TreeNode | null\n *     constructor(val?: number, left?: TreeNode | null, right?: TreeNode | null) {\n *         this.val = (val===undefined ? 0 : val)\n *         this.left = (left===undefined ? null : left)\n *         this.right = (right===undefined ? null : right)\n *     }\n * }\n */\n\nfunction sumRootToLeaf(root: TreeNode | null): number {\n    \n};",
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                    "code": "/**\n * Definition for a binary tree node.\n * class TreeNode {\n *     public $val = null;\n *     public $left = null;\n *     public $right = null;\n *     function __construct($val = 0, $left = null, $right = null) {\n *         $this->val = $val;\n *         $this->left = $left;\n *         $this->right = $right;\n *     }\n * }\n */\nclass Solution {\n\n    /**\n     * @param TreeNode $root\n     * @return Integer\n     */\n    function sumRootToLeaf($root) {\n        \n    }\n}",
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                    "code": "/**\n * Definition for a binary tree node.\n * public class TreeNode {\n *     public var val: Int\n *     public var left: TreeNode?\n *     public var right: TreeNode?\n *     public init() { self.val = 0; self.left = nil; self.right = nil; }\n *     public init(_ val: Int) { self.val = val; self.left = nil; self.right = nil; }\n *     public init(_ val: Int, _ left: TreeNode?, _ right: TreeNode?) {\n *         self.val = val\n *         self.left = left\n *         self.right = right\n *     }\n * }\n */\nclass Solution {\n    func sumRootToLeaf(_ root: TreeNode?) -> Int {\n        \n    }\n}",
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                    "lang": "Kotlin",
                    "langSlug": "kotlin",
                    "code": "/**\n * Example:\n * var ti = TreeNode(5)\n * var v = ti.`val`\n * Definition for a binary tree node.\n * class TreeNode(var `val`: Int) {\n *     var left: TreeNode? = null\n *     var right: TreeNode? = null\n * }\n */\nclass Solution {\n    fun sumRootToLeaf(root: TreeNode?): Int {\n        \n    }\n}",
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                    "langSlug": "dart",
                    "code": "/**\n * Definition for a binary tree node.\n * class TreeNode {\n *   int val;\n *   TreeNode? left;\n *   TreeNode? right;\n *   TreeNode([this.val = 0, this.left, this.right]);\n * }\n */\nclass Solution {\n  int sumRootToLeaf(TreeNode? root) {\n    \n  }\n}",
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                    "code": "/**\n * Definition for a binary tree node.\n * type TreeNode struct {\n *     Val int\n *     Left *TreeNode\n *     Right *TreeNode\n * }\n */\nfunc sumRootToLeaf(root *TreeNode) int {\n    \n}",
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                    "code": "# Definition for a binary tree node.\n# class TreeNode\n#     attr_accessor :val, :left, :right\n#     def initialize(val = 0, left = nil, right = nil)\n#         @val = val\n#         @left = left\n#         @right = right\n#     end\n# end\n# @param {TreeNode} root\n# @return {Integer}\ndef sum_root_to_leaf(root)\n    \nend",
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                    "code": "/**\n * Definition for a binary tree node.\n * class TreeNode(_value: Int = 0, _left: TreeNode = null, _right: TreeNode = null) {\n *   var value: Int = _value\n *   var left: TreeNode = _left\n *   var right: TreeNode = _right\n * }\n */\nobject Solution {\n    def sumRootToLeaf(root: TreeNode): Int = {\n        \n    }\n}",
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                    "code": "// Definition for a binary tree node.\n// #[derive(Debug, PartialEq, Eq)]\n// pub struct TreeNode {\n//   pub val: i32,\n//   pub left: Option<Rc<RefCell<TreeNode>>>,\n//   pub right: Option<Rc<RefCell<TreeNode>>>,\n// }\n// \n// impl TreeNode {\n//   #[inline]\n//   pub fn new(val: i32) -> Self {\n//     TreeNode {\n//       val,\n//       left: None,\n//       right: None\n//     }\n//   }\n// }\nuse std::rc::Rc;\nuse std::cell::RefCell;\nimpl Solution {\n    pub fn sum_root_to_leaf(root: Option<Rc<RefCell<TreeNode>>>) -> i32 {\n        \n    }\n}",
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                    "code": "; Definition for a binary tree node.\n#|\n\n; val : integer?\n; left : (or/c tree-node? #f)\n; right : (or/c tree-node? #f)\n(struct tree-node\n  (val left right) #:mutable #:transparent)\n\n; constructor\n(define (make-tree-node [val 0])\n  (tree-node val #f #f))\n\n|#\n\n(define/contract (sum-root-to-leaf root)\n  (-> (or/c tree-node? #f) exact-integer?)\n  )",
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                    "code": "%% Definition for a binary tree node.\n%%\n%% -record(tree_node, {val = 0 :: integer(),\n%%                     left = null  :: 'null' | #tree_node{},\n%%                     right = null :: 'null' | #tree_node{}}).\n\n-spec sum_root_to_leaf(Root :: #tree_node{} | null) -> integer().\nsum_root_to_leaf(Root) ->\n  .",
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                    "code": "# Definition for a binary tree node.\n#\n# defmodule TreeNode do\n#   @type t :: %__MODULE__{\n#           val: integer,\n#           left: TreeNode.t() | nil,\n#           right: TreeNode.t() | nil\n#         }\n#   defstruct val: 0, left: nil, right: nil\n# end\n\ndefmodule Solution do\n  @spec sum_root_to_leaf(root :: TreeNode.t | nil) :: integer\n  def sum_root_to_leaf(root) do\n    \n  end\nend",
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                    "code": "/**\n * Definition for a binary tree node.\n * public class BinaryTreeNode {\n *     public var val: Int64\n *     public var left: ?BinaryTreeNode\n *     public var right: ?BinaryTreeNode\n *     public init() {\n *         val = 0\n *         left = None\n *         right = None\n *     }\n *     public init(val: Int64) {\n *         this()\n *         this.val = val\n *     }\n * }\n */\n\nclass Solution {\n    func sumRootToLeaf(root: ?BinaryTreeNode): Int64 {\n\n    }\n}",
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