#1581Hard#42 in Citadel's list· asked at 11 companies
Reconstruct Itinerary
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What we know
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"]
Constraints
- •
1 <= tickets.length <= 300 - •
tickets[i].length == 2 - •
from_i != to_i - •
Both are uppercase 3-letter codes.