Intervals - Meeting Rooms I
Given the following code snippet, what is the output when calling can_attend_meetings([[0,30],[5,10],[15,20]])?
Given the following code snippet, what is the output when calling can_attend_meetings([[0,30],[5,10],[15,20]])?
easy🧾 Code Trace Q3 of Q15
Step-by-Step Solution
Solution:
Step 1: Sort intervals by start time
Sorted intervals: [[0,30],[5,10],[15,20]] (already sorted)Step 2: Check overlaps in order
First interval end = -inf -> 30; second interval start=5 < 30 -> overlap detected, return FalseFinal Answer:
Option C -> Option CQuick Check:
Overlap detected between first and second intervals [OK]
Quick Trick: Overlap if current start < previous end [OK]
Common Mistakes:
MISTAKES- Ignoring sorting step
- Using <= instead of < causing false positives
Trap Explanation:
PITFALL- Candidates may miss that 5 < 30 means overlap, returning True incorrectly.
Interviewer Note:
CONTEXT- Tests ability to trace code logic on typical input.
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