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"content": "<p>Given two binary trees <code>original</code> and <code>cloned</code> and given a reference to a node <code>target</code> in the original tree.</p>\n\n<p>The <code>cloned</code> tree is a <strong>copy of</strong> the <code>original</code> tree.</p>\n\n<p>Return <em>a reference to the same node</em> in the <code>cloned</code> tree.</p>\n\n<p><strong>Note</strong> that you are <strong>not allowed</strong> to change any of the two trees or the <code>target</code> node and the answer <strong>must be</strong> a reference to a node in the <code>cloned</code> tree.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/02/21/e1.png\" style=\"width: 544px; height: 426px;\" />\n<pre>\n<strong>Input:</strong> tree = [7,4,3,null,null,6,19], target = 3\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> In all examples the original and cloned trees are shown. The target node is a green node from the original tree. The answer is the yellow node from the cloned tree.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/02/21/e2.png\" style=\"width: 221px; height: 159px;\" />\n<pre>\n<strong>Input:</strong> tree = [7], target = 7\n<strong>Output:</strong> 7\n</pre>\n\n<p><strong>Example 3:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/02/21/e3.png\" style=\"width: 459px; height: 486px;\" />\n<pre>\n<strong>Input:</strong> tree = [8,null,6,null,5,null,4,null,3,null,2,null,1], target = 4\n<strong>Output:</strong> 4\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li>The number of nodes in the <code>tree</code> is in the range <code>[1, 10<sup>4</sup>]</code>.</li>\n\t<li>The values of the nodes of the <code>tree</code> are unique.</li>\n\t<li><code>target</code> node is a node from the <code>original</code> tree and is not <code>null</code>.</li>\n</ul>\n\n<p> </p>\n<p><strong>Follow up:</strong> Could you solve the problem if repeated values on the tree are allowed?</p>\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(int x) : val(x), left(NULL), right(NULL) {}\n * };\n */\n\nclass Solution {\npublic:\n TreeNode* getTargetCopy(TreeNode* original, TreeNode* cloned, TreeNode* target) {\n \n }\n};",
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