Greedy Algorithms - Reorganize String (No Two Adjacent Same)
What is the auxiliary space complexity of the max heap approach to reorganize a string with k unique characters?
What is the auxiliary space complexity of the max heap approach to reorganize a string with k unique characters?
medium🪤 Complexity Trap Q6 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify space usage
Heap stores k elements, result array stores n characters, plus frequency map of size k.Step 2: Sum auxiliary space
Total auxiliary space is O(k) for heap and freq map plus O(n) for result, combined O(k + n).Final Answer:
Option B -> Option BQuick Check:
Space includes both heap and output array [OK]
Quick Trick: Space includes heap (k) plus output (n) [OK]
Common Mistakes:
MISTAKES- Ignoring output array space
- Confusing input and auxiliary space
- Assuming only heap space matters
Trap Explanation:
PITFALL- Candidates often forget output string space or frequency map space in total auxiliary space.
Interviewer Note:
CONTEXT- Tests understanding of space complexity including auxiliary data structures.
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