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"translatedContent": "<p>给定一棵二叉树,其中每个节点都含有一个整数数值(该值或正或负)。设计一个算法,打印节点数值总和等于某个给定值的所有路径的数量。注意,路径不一定非得从二叉树的根节点或叶节点开始或结束,但是其方向必须向下(只能从父节点指向子节点方向)。</p>\n\n<p><strong>示例:</strong><br>\n给定如下二叉树,以及目标和 <code>sum = 22</code>,</p>\n\n<pre> 5\n / \\\n 4 8\n / / \\\n 11 13 4\n / \\ / \\\n 7 2 5 1\n</pre>\n\n<p>返回:</p>\n\n<pre>3\n<strong>解释:</strong>和为 22 的路径有:[5,4,11,2], [5,8,4,5], [4,11,7]</pre>\n\n<p>提示:</p>\n\n<ul>\n\t<li><code>节点总数 <= 10000</code></li>\n</ul>\n",
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"difficulty": "Medium",
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@@ -149,7 +149,7 @@
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"hints": [
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"尝试简化问题。如果路径必须从根开始会如何?",
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"不要忘记路径可能会重叠。例如,如果你正在寻找总和6,那么路径1 -> 3 -> 2和1 -> 3 -> 2 -> 4 -> 6 -> 2都是有效的。",
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