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"translatedContent": "<p>给你二叉树的根结点 <code>root</code> ,此外树的每个结点的值要么是 <code>0</code> ,要么是 <code>1</code> 。</p>\n\n<p>返回移除了所有不包含 <code>1</code> 的子树的原二叉树。</p>\n\n<p>节点 <code>node</code> 的子树为 <code>node</code> 本身加上所有 <code>node</code> 的后代。</p>\n\n<p> </p>\n\n<p><strong>示例 1:</strong></p>\n<img alt=\"\" src=\"https://s3-lc-upload.s3.amazonaws.com/uploads/2018/04/06/1028_2.png\" style=\"width: 500px; height: 140px;\" />\n<pre>\n<strong>输入:</strong>root = [1,null,0,0,1]\n<strong>输出:</strong>[1,null,0,null,1]\n<strong>解释:</strong>\n只有红色节点满足条件“所有不包含 1 的子树”。 右图为返回的答案。\n</pre>\n\n<p><strong>示例 2:</strong></p>\n<img alt=\"\" src=\"https://s3-lc-upload.s3.amazonaws.com/uploads/2018/04/06/1028_1.png\" style=\"width: 500px; height: 115px;\" />\n<pre>\n<strong>输入:</strong>root = [1,0,1,0,0,0,1]\n<strong>输出:</strong>[1,null,1,null,1]\n</pre>\n\n<p><strong>示例 3:</strong></p>\n<img alt=\"\" src=\"https://s3-lc-upload.s3.amazonaws.com/uploads/2018/04/05/1028.png\" style=\"width: 500px; height: 134px;\" />\n<pre>\n<strong>输入:</strong>root = [1,1,0,1,1,0,1,0]\n<strong>输出:</strong>[1,1,0,1,1,null,1]\n</pre>\n\n<p> </p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li>树中节点的数目在范围 <code>[1, 200]</code> 内</li>\n\t<li><code>Node.val</code> 为 <code>0</code> 或 <code>1</code></li>\n</ul>\n",
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