Hard

Maximal Unique-Character Word Set AI-Assisted Coding Interview

Choose words whose concatenation contains no repeated character while maximizing the total number of distinct characters.

Mock Interview with AI

1. Problem Statement

Implement a function that selects compatible words to maximize the number of unique characters. State your search strategy before using the AI assistant.

2. Live Coding Format

Work in the provided coding workspace while explaining your decisions to the live interviewer. Validation may use inline tests, examples, comments, or a verbal walkthrough.

3. Key Focus Areas

1
Algorithm selection
2
State representation
3
Pruning correctness
4
Prompt granularity
5
Tradeoff communication

4. What Strong Candidates Should Demonstrate

✓Choose and justify a search representation before prompting an assistant.
✓Review generated pruning logic for correctness.
✓Reconsider an approach when the input distribution changes.

Want interactive feedback?

Practice this problem in the live coding workspace while the interviewer probes your clarification, implementation, trade-offs, and validation.

Start Interview

Core Concepts

BacktrackingBitmasksSearch PruningAlgorithm Tradeoffs