Package g0301_0400.s0332_reconstruct_itinerary

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    332 - Reconstruct Itinerary\.

    Hard

    You are given a list of airline tickets where <code>ticketsi = from<sub>i</sub>, to<sub>i</sub></code> represent the departure and the arrival airports of one flight. Reconstruct the itinerary in order and return it.

    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.

    • For example, the itinerary ["JFK", "LGA"] has a smaller lexical order than ["JFK", "LGB"].

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

    Example 1:

    Input: tickets = \[\["MUC","LHR"],"JFK","MUC","SFO","SJC","LHR","SFO"]

    Output: "JFK","MUC","LHR","SFO","SJC"

    Example 2:

    Input: tickets = \[\["JFK","SFO"],"JFK","ATL","SFO","ATL","ATL","JFK","ATL","SFO"]

    Output: "JFK","ATL","JFK","SFO","ATL","SFO"

    Explanation:

    Another possible reconstruction is
["JFK","SFO","ATL","JFK","ATL","SFO"] but it is larger in lexical order.

    Constraints:

    • 1 &lt;= tickets.length &lt;= 300

    • tickets[i].length == 2

    • <code>from<sub>i</sub>.length == 3</code>

    • <code>to<sub>i</sub>.length == 3</code>

    • <code>from<sub>i</sub></code> and <code>to<sub>i</sub></code> consist of uppercase English letters.

    • <code>from<sub>i</sub> != to<sub>i</sub></code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final List<String> findItinerary(List<List<String>> tickets)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait