leetcode-problemset/leetcode-cn/originData/find-eventual-safe-states.json

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            "title": "Find Eventual Safe States",
            "titleSlug": "find-eventual-safe-states",
            "content": "<p>There is a directed graph of <code>n</code> nodes with each node labeled from <code>0</code> to <code>n - 1</code>. The graph is represented by a <strong>0-indexed</strong> 2D integer array <code>graph</code> where <code>graph[i]</code> is an integer array of nodes adjacent to node <code>i</code>, meaning there is an edge from node <code>i</code> to each node in <code>graph[i]</code>.</p>\n\n<p>A node is a <strong>terminal node</strong> if there are no outgoing edges. A node is a <strong>safe node</strong> if every possible path starting from that node leads to a <strong>terminal node</strong> (or another safe node).</p>\n\n<p>Return <em>an array containing all the <strong>safe nodes</strong> of the graph</em>. The answer should be sorted in <strong>ascending</strong> order.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img alt=\"Illustration of graph\" src=\"https://s3-lc-upload.s3.amazonaws.com/uploads/2018/03/17/picture1.png\" style=\"height: 171px; width: 600px;\" />\n<pre>\n<strong>Input:</strong> graph = [[1,2],[2,3],[5],[0],[5],[],[]]\n<strong>Output:</strong> [2,4,5,6]\n<strong>Explanation:</strong> The given graph is shown above.\nNodes 5 and 6 are terminal nodes as there are no outgoing edges from either of them.\nEvery path starting at nodes 2, 4, 5, and 6 all lead to either node 5 or 6.</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> graph = [[1,2,3,4],[1,2],[3,4],[0,4],[]]\n<strong>Output:</strong> [4]\n<strong>Explanation:</strong>\nOnly node 4 is a terminal node, and every path starting at node 4 leads to node 4.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>n == graph.length</code></li>\n\t<li><code>1 &lt;= n &lt;= 10<sup>4</sup></code></li>\n\t<li><code>0 &lt;= graph[i].length &lt;= n</code></li>\n\t<li><code>0 &lt;= graph[i][j] &lt;= n - 1</code></li>\n\t<li><code>graph[i]</code> is sorted in a strictly increasing order.</li>\n\t<li>The graph may contain self-loops.</li>\n\t<li>The number of edges in the graph will be in the range <code>[1, 4 * 10<sup>4</sup>]</code>.</li>\n</ul>\n",
            "translatedTitle": "找到最终的安全状态",
            "translatedContent": "<p>有一个有 <code>n</code> 个节点的有向图，节点按 <code>0</code> 到 <code>n - 1</code> 编号。图由一个 <strong>索引从 0 开始</strong> 的 2D 整数数组&nbsp;<code>graph</code>表示，&nbsp;<code>graph[i]</code>是与节点 <code>i</code> 相邻的节点的整数数组，这意味着从节点 <code>i</code> 到&nbsp;<code>graph[i]</code>中的每个节点都有一条边。</p>\n\n<p>如果一个节点没有连出的有向边，则该节点是 <strong>终端节点</strong> 。如果从该节点开始的所有可能路径都通向 <strong>终端节点</strong> ，则该节点为 <strong>安全节点</strong> 。</p>\n\n<p>返回一个由图中所有 <strong>安全节点</strong> 组成的数组作为答案。答案数组中的元素应当按 <strong>升序</strong> 排列。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<p><img alt=\"Illustration of graph\" src=\"https://s3-lc-upload.s3.amazonaws.com/uploads/2018/03/17/picture1.png\" /></p>\n\n<pre>\n<strong>输入：</strong>graph = [[1,2],[2,3],[5],[0],[5],[],[]]\n<strong>输出：</strong>[2,4,5,6]\n<strong>解释：</strong>示意图如上。\n节点 5 和节点 6 是终端节点，因为它们都没有出边。\n从节点 2、4、5 和 6 开始的所有路径都指向节点 5 或 6 。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>graph = [[1,2,3,4],[1,2],[3,4],[0,4],[]]\n<strong>输出：</strong>[4]\n<strong>解释:</strong>\n只有节点 4 是终端节点，从节点 4 开始的所有路径都通向节点 4 。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>n == graph.length</code></li>\n\t<li><code>1 &lt;= n &lt;= 10<sup>4</sup></code></li>\n\t<li><code>0 &lt;= graph[i].length &lt;= n</code></li>\n\t<li><code>0 &lt;= graph[i][j] &lt;= n - 1</code></li>\n\t<li><code>graph[i]</code> 按严格递增顺序排列。</li>\n\t<li>图中可能包含自环。</li>\n\t<li>图中边的数目在范围 <code>[1, 4 * 10<sup>4</sup>]</code> 内。</li>\n</ul>\n",
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