Round 1
Questions: Specific question not provided.
Follow-up Question
- Example test case that fails (the order is reported as "", but the correct one is "acbz"):
vector<string> words2 = {"ac","ab","zc","zb"}; string res2 = alienOrder(words2); cout << "Alien Order: " << res2 << endl;
Candidate's Approach
The candidate implemented a BFS solution for the Alien Dictionary problem. The approach involves:
- Building a graph from the given words, where each character is a node and directed edges represent the order of characters.
- Using an indegree array to track the number of incoming edges for each character.
- Performing a BFS to determine the order of characters, starting from nodes with zero indegree.
- The candidate noted that the solution fails for certain test cases, specifically returning an empty string instead of the expected order.
Interviewer's Feedback
No feedback provided.