Intervals - Non-overlapping Intervals (Max Non-Overlap)
What does the function return for intervals = [[0,0]]?
What does the function return for intervals = [[0,0]]?
medium🧾 Code Trace Q4 of Q15
Step-by-Step Solution
Solution:
Step 1: Sort intervals by end time
Only one interval [0,0], so sorting does not change order.Step 2: Greedy selection
Start=0 >= last_end=-inf, select interval, count=1, last_end=0.Final Answer:
Option C -> Option CQuick Check:
Single interval always selected [OK]
Quick Trick: Single interval -> count=1 [OK]
Common Mistakes:
MISTAKES- Assuming zero-length intervals are invalid
- Off-by-one in comparisons
- Returning zero for single interval
Trap Explanation:
PITFALL- Candidates may think zero-length intervals cannot be selected or cause errors.
Interviewer Note:
CONTEXT- Tests handling of edge cases with zero-length intervals.
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