Package g0301_0400.s0332_reconstruct_itinerary

Class Solution

java.lang.Object
g0301_0400.s0332_reconstruct_itinerary.Solution
public class Solution extends java.lang.Object
332 - Reconstruct Itinerary.

Hard

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.

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 <= tickets.length <= 300
  • tickets[i].length == 2
  • fromi.length == 3
  • toi.length == 3
  • fromi and toi consist of uppercase English letters.
  • fromi != toi

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.util.List<java.lang.String>
    findItinerary(java.util.List<java.util.List<java.lang.String>> tickets)
     

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • findItinerary

      public java.util.List<java.lang.String> findItinerary(java.util.List<java.util.List<java.lang.String>> tickets)