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What is the output of the insert function when called with intervals = [[1,1]] and newInterval = [0,0]?

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Intervals - Insert Interval
What is the output of the insert function when called with intervals = [[1,1]] and newInterval = [0,0]?
A[[0,1]]
B[[0,0],[1,1]]
C[[0,0],[1,1]]
D[[1,1],[0,0]]
Step-by-Step Solution
Solution:

  1. Step 1: Append and sort intervals

    Intervals become [[1,1],[0,0]] then sorted to [[0,0],[1,1]].

  2. Step 2: Merge overlapping intervals

    Since 1 > 0, and 1 > 0, intervals do not overlap (0,0) and (1,1) remain separate.

  3. Final Answer:

    Option C -> Option C

  4. Quick Check:

    Intervals remain separate because they do not overlap [OK]
Quick Trick: Intervals touching at boundaries do not merge if no overlap [OK]
Common Mistakes:
MISTAKES
  • Assuming intervals that just touch merge incorrectly
Trap Explanation:
PITFALL
  • Candidates often merge intervals that only touch at boundaries, but condition requires overlap.
Interviewer Note:
CONTEXT
  • Tests boundary condition handling and code tracing on edge cases.
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