Bit Manipulation - UTF-8 Validation
What is the space complexity of the optimal UTF-8 validation algorithm that uses a single pass with a continuation byte counter?
What is the space complexity of the optimal UTF-8 validation algorithm that uses a single pass with a continuation byte counter?
medium🪤 Complexity Trap Q6 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify auxiliary data structures
The algorithm uses only a few integer variables (e.g., remaining counter).Step 2: Confirm no recursion or extra arrays
No recursion or extra arrays means constant space usage.Final Answer:
Option B -> Option BQuick Check:
Only counters used -> O(1) space [OK]
Quick Trick: No recursion or arrays means O(1) space [OK]
Common Mistakes:
MISTAKES- Assuming recursion stack space
- Counting input array as extra space
Trap Explanation:
PITFALL- Candidates confuse input size with auxiliary space or forget recursion stack space.
Interviewer Note:
CONTEXT- Tests understanding of space usage in iterative bitmask algorithms.
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