{ "data": { "question": { "questionId": "332", "questionFrontendId": "332", "categoryTitle": "Algorithms", "boundTopicId": 1873, "title": "Reconstruct Itinerary", "titleSlug": "reconstruct-itinerary", "content": "

You are given a list of airline tickets where tickets[i] = [fromi, toi] represent the departure and the arrival airports of one flight. Reconstruct the itinerary in order and return it.

\n\n

All of the tickets belong to a man who departs from "JFK", thus, the itinerary must begin with "JFK". If there are multiple valid itineraries, you should return the itinerary that has the smallest lexical order when read as a single string.

\n\n\n\n

You may assume all tickets form at least one valid itinerary. You must use all the tickets once and only once.

\n\n

 

\n

Example 1:

\n\"\"\n
\nInput: tickets = [["MUC","LHR"],["JFK","MUC"],["SFO","SJC"],["LHR","SFO"]]\nOutput: ["JFK","MUC","LHR","SFO","SJC"]\n
\n\n

Example 2:

\n\"\"\n
\nInput: tickets = [["JFK","SFO"],["JFK","ATL"],["SFO","ATL"],["ATL","JFK"],["ATL","SFO"]]\nOutput: ["JFK","ATL","JFK","SFO","ATL","SFO"]\nExplanation: Another possible reconstruction is ["JFK","SFO","ATL","JFK","ATL","SFO"] but it is larger in lexical order.\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "重新安排行程", "translatedContent": "

给你一份航线列表 tickets ，其中 tickets[i] = [fromi, toi] 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。

\n\n

所有这些机票都属于一个从 JFK（肯尼迪国际机场）出发的先生，所以该行程必须从 JFK 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。

\n\n\n\n

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。

\n\n

 

\n\n

示例 1：

\n\"\"\n
\n输入：tickets = [[\"MUC\",\"LHR\"],[\"JFK\",\"MUC\"],[\"SFO\",\"SJC\"],[\"LHR\",\"SFO\"]]\n输出：[\"JFK\",\"MUC\",\"LHR\",\"SFO\",\"SJC\"]\n
\n\n

示例 2：

\n\"\"\n
\n输入：tickets = [[\"JFK\",\"SFO\"],[\"JFK\",\"ATL\"],[\"SFO\",\"ATL\"],[\"ATL\",\"JFK\"],[\"ATL\",\"SFO\"]]\n输出：[\"JFK\",\"ATL\",\"JFK\",\"SFO\",\"ATL\",\"SFO\"]\n解释：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
\n\n

 

\n\n

提示：

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