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"translatedContent": "<p>给你二叉树的根节点 <code>root</code> 和一个表示目标和的整数 <code>targetSum</code> 。判断该树中是否存在 <strong>根节点到叶子节点</strong> 的路径,这条路径上所有节点值相加等于目标和 <code>targetSum</code> 。如果存在,返回 <code>true</code> ;否则,返回 <code>false</code> 。</p>\n\n<p><strong>叶子节点</strong> 是指没有子节点的节点。</p>\n\n<p> </p>\n\n<p><strong>示例 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/01/18/pathsum1.jpg\" style=\"width: 500px; height: 356px;\" />\n<pre>\n<strong>输入:</strong>root = [5,4,8,11,null,13,4,7,2,null,null,null,1], targetSum = 22\n<strong>输出:</strong>true\n<strong>解释:</strong>等于目标和的根节点到叶节点路径如上图所示。\n</pre>\n\n<p><strong>示例 2:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/01/18/pathsum2.jpg\" />\n<pre>\n<strong>输入:</strong>root = [1,2,3], targetSum = 5\n<strong>输出:</strong>false\n<strong>解释:</strong>树中存在两条根节点到叶子节点的路径:\n(1 --> 2): 和为 3\n(1 --> 3): 和为 4\n不存在 sum = 5 的根节点到叶子节点的路径。</pre>\n\n<p><strong>示例 3:</strong></p>\n\n<pre>\n<strong>输入:</strong>root = [], targetSum = 0\n<strong>输出:</strong>false\n<strong>解释:</strong>由于树是空的,所以不存在根节点到叶子节点的路径。\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>[0, 5000]</code> 内</li>\n\t<li><code>-1000 <= Node.val <= 1000</code></li>\n\t<li><code>-1000 <= targetSum <= 1000</code></li>\n</ul>\n",
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