Graphs · Eulerian Path · Hierholzer's Algorithm
LC-332. Reconstruct Itinerary
LC-332. Reconstruct Itinerary on FaangDeck — Eulerian Path · Hierholzer's Algorithm pattern lesson. Signals, template, trap, Python solution, complexity…
What's inside this lesson
- Hook & First Instinct — frame the problem like an interviewer expects
- Brute force → Insight — what's redundant, what to exploit
- Recognition signals — three cues in the problem that point to this pattern
- Canonical template + adapted solution — clean Python, line-commented
- The trap — the near-correct bug everyone hits first time
- Trace + complexity — step-by-step walkthrough + time/space
- Interview Playbook — what to actually say in the room
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