Greedy Algorithms - Minimum Domino Rotations
What is the space complexity of the optimal single-pass greedy solution for the Minimum Domino Rotations problem?
What is the space complexity of the optimal single-pass greedy solution for the Minimum Domino Rotations problem?
medium🪤 Complexity Trap Q6 of Q15
Step-by-Step Solution
Solution:
Step 1: Analyze data structures used
Only counters for rotations are maintained, no extra arrays.Step 2: Confirm no recursion or auxiliary storage
Algorithm is iterative with constant variables, no recursion stack.Step 3: Determine space complexity
Only constant counters -> O(1) space.Final Answer:
Option D -> Option DQuick Check:
Only constant counters -> O(1) space [OK]
Quick Trick: No recursion or extra arrays used [OK]
Common Mistakes:
MISTAKES- Assuming recursion or auxiliary arrays increase space
Trap Explanation:
PITFALL- Candidates confuse iterative counting with recursive or DP space.
Interviewer Note:
CONTEXT- Tests space complexity understanding and iterative vs recursive distinction.
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