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"translatedContent": "<p>给你一份航线列表 <code>tickets</code> ,其中 <code>tickets[i] = [from<sub>i</sub>, to<sub>i</sub>]</code> 表示飞机出发和降落的机场地点。请你对该行程进行重新规划排序。</p>\n\n<p>所有这些机票都属于一个从 <code>JFK</code>(肯尼迪国际机场)出发的先生,所以该行程必须从 <code>JFK</code> 开始。如果存在多种有效的行程,请你按字典排序返回最小的行程组合。</p>\n\n<ul>\n\t<li>例如,行程 <code>[\"JFK\", \"LGA\"]</code> 与 <code>[\"JFK\", \"LGB\"]</code> 相比就更小,排序更靠前。</li>\n</ul>\n\n<p>假定所有机票至少存在一种合理的行程。且所有的机票 必须都用一次 且 只能用一次。</p>\n\n<p> </p>\n\n<p><strong>示例 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/03/14/itinerary1-graph.jpg\" style=\"width: 382px; height: 222px;\" />\n<pre>\n<strong>输入:</strong>tickets = [[\"MUC\",\"LHR\"],[\"JFK\",\"MUC\"],[\"SFO\",\"SJC\"],[\"LHR\",\"SFO\"]]\n<strong>输出:</strong>[\"JFK\",\"MUC\",\"LHR\",\"SFO\",\"SJC\"]\n</pre>\n\n<p><strong>示例 2:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/03/14/itinerary2-graph.jpg\" style=\"width: 222px; height: 230px;\" />\n<pre>\n<strong>输入:</strong>tickets = [[\"JFK\",\"SFO\"],[\"JFK\",\"ATL\"],[\"SFO\",\"ATL\"],[\"ATL\",\"JFK\"],[\"ATL\",\"SFO\"]]\n<strong>输出:</strong>[\"JFK\",\"ATL\",\"JFK\",\"SFO\",\"ATL\",\"SFO\"]\n<strong>解释:</strong>另一种有效的行程是 [\"JFK\",\"SFO\",\"ATL\",\"JFK\",\"ATL\",\"SFO\"] ,但是它字典排序更大更靠后。\n</pre>\n\n<p> </p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 <= tickets.length <= 300</code></li>\n\t<li><code>tickets[i].length == 2</code></li>\n\t<li><code>from<sub>i</sub>.length == 3</code></li>\n\t<li><code>to<sub>i</sub>.length == 3</code></li>\n\t<li><code>from<sub>i</sub></code> 和 <code>to<sub>i</sub></code> 由大写英文字母组成</li>\n\t<li><code>from<sub>i</sub> != to<sub>i</sub></code></li>\n</ul>\n",
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