Greedy Algorithms - Minimum Domino Rotations
What is the output of minDominoRotations when given the edge case input A = [1], B = [2]?
What is the output of minDominoRotations when given the edge case input A = [1], B = [2]?
medium🧾 Code Trace Q4 of Q15
Step-by-Step Solution
Solution:
Step 1: Check candidate A[0] = 1
Top is already 1, no rotations needed.Step 2: Confirm no rotations needed
Since A[0] == 1, rotations = 0, so return 0.Final Answer:
Option A -> Option AQuick Check:
Single domino already uniform, zero rotations needed [OK]
Quick Trick: Single element equal means zero rotations [OK]
Common Mistakes:
MISTAKES- Returning -1 or 1 incorrectly for single element
Trap Explanation:
PITFALL- Candidates confuse rotations needed when element already matches candidate.
Interviewer Note:
CONTEXT- Tests edge case handling and boundary conditions.
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