Bit Manipulation - Maximum Product of Word Lengths
Suppose the problem changes: you want to find the maximum product of word lengths where words can be reused multiple times (unbounded). Which approach best handles this variant?
Suppose the problem changes: you want to find the maximum product of word lengths where words can be reused multiple times (unbounded). Which approach best handles this variant?
hard🎤 Interviewer Follow-up Q10 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand unbounded reuse impact
Allowing reuse means pairs can be repeated, so previous pairwise checks insufficient.Step 2: Identify suitable approach
Greedy selection of longest words without overlap can maximize product by repeated use, as DP over bitmasks becomes complex.Final Answer:
Option C -> Option CQuick Check:
Unbounded reuse favors greedy or specialized approaches over pairwise bitmask DP [OK]
Quick Trick: Unbounded reuse breaks pairwise DP, greedy may work better [OK]
Common Mistakes:
MISTAKES- Applying pairwise bitmask DP naively
- Ignoring reuse impact on approach
Trap Explanation:
PITFALL- Candidates often try to reuse pairwise DP approach, which fails with unbounded reuse.
Interviewer Note:
CONTEXT- Tests ability to adapt approach to problem variants with reuse
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