leetcode-problemset/leetcode-cn/originData/keys-and-rooms.json

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            "title": "Keys and Rooms",
            "titleSlug": "keys-and-rooms",
            "content": "<p>There are <code>n</code> rooms labeled from <code>0</code> to <code>n - 1</code>&nbsp;and all the rooms are locked except for room <code>0</code>. Your goal is to visit all the rooms. However, you cannot enter a locked room without having its key.</p>\n\n<p>When you visit a room, you may find a set of <strong>distinct keys</strong> in it. Each key has a number on it, denoting which room it unlocks, and you can take all of them with you to unlock the other rooms.</p>\n\n<p>Given an array <code>rooms</code> where <code>rooms[i]</code> is the set of keys that you can obtain if you visited room <code>i</code>, return <code>true</code> <em>if you can visit <strong>all</strong> the rooms, or</em> <code>false</code> <em>otherwise</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> rooms = [[1],[2],[3],[]]\n<strong>Output:</strong> true\n<strong>Explanation:</strong> \nWe visit room 0 and pick up key 1.\nWe then visit room 1 and pick up key 2.\nWe then visit room 2 and pick up key 3.\nWe then visit room 3.\nSince we were able to visit every room, we return true.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> rooms = [[1,3],[3,0,1],[2],[0]]\n<strong>Output:</strong> false\n<strong>Explanation:</strong> We can not enter room number 2 since the only key that unlocks it is in that room.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>n == rooms.length</code></li>\n\t<li><code>2 &lt;= n &lt;= 1000</code></li>\n\t<li><code>0 &lt;= rooms[i].length &lt;= 1000</code></li>\n\t<li><code>1 &lt;= sum(rooms[i].length) &lt;= 3000</code></li>\n\t<li><code>0 &lt;= rooms[i][j] &lt; n</code></li>\n\t<li>All the values of <code>rooms[i]</code> are <strong>unique</strong>.</li>\n</ul>\n",
            "translatedTitle": "钥匙和房间",
            "translatedContent": "<p>有 <code>n</code> 个房间，房间按从 <code>0</code> 到 <code>n - 1</code> 编号。最初，除 <code>0</code> 号房间外的其余所有房间都被锁住。你的目标是进入所有的房间。然而，你不能在没有获得钥匙的时候进入锁住的房间。</p>\n\n<p>当你进入一个房间，你可能会在里面找到一套不同的钥匙，每把钥匙上都有对应的房间号，即表示钥匙可以打开的房间。你可以拿上所有钥匙去解锁其他房间。</p>\n\n<p>给你一个数组 <code>rooms</code> 其中 <code>rooms[i]</code> 是你进入 <code>i</code> 号房间可以获得的钥匙集合。如果能进入 <strong>所有</strong> 房间返回 <code>true</code>，否则返回 <code>false</code>。</p>\n\n<p>&nbsp;</p>\n\n<ol>\n</ol>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>rooms = [[1],[2],[3],[]]\n<strong>输出：</strong>true\n<strong>解释：</strong>\n我们从 0 号房间开始，拿到钥匙 1。\n之后我们去 1 号房间，拿到钥匙 2。\n然后我们去 2 号房间，拿到钥匙 3。\n最后我们去了 3 号房间。\n由于我们能够进入每个房间，我们返回 true。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>rooms = [[1,3],[3,0,1],[2],[0]]\n<strong>输出：</strong>false\n<strong>解释：</strong>我们不能进入 2 号房间。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>n == rooms.length</code></li>\n\t<li><code>2 &lt;= n &lt;= 1000</code></li>\n\t<li><code>0 &lt;= rooms[i].length &lt;= 1000</code></li>\n\t<li><code>1 &lt;= sum(rooms[i].length) &lt;= 3000</code></li>\n\t<li><code>0 &lt;= rooms[i][j] &lt; n</code></li>\n\t<li>所有 <code>rooms[i]</code> 的值 <strong>互不相同</strong></li>\n</ul>\n",
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