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Which of the following problems CANNOT be solved using the minimum number of platforms (maximum overlap) pattern?

easy🔍 Pattern Recognition Q2 of Q15
Intervals - Minimum Number of Platforms Required
Which of the following problems CANNOT be solved using the minimum number of platforms (maximum overlap) pattern?
ACalculating the minimum number of platforms so no train waits
BMerging overlapping intervals into consolidated time blocks
CDetermining the maximum number of trains at the station simultaneously
DFinding the minimum number of meeting rooms required for scheduled meetings
Step-by-Step Solution
Solution:

  1. Step 1: Analyze each problem

    Options A, B, and D involve interval overlaps or concurrency.

  2. Step 2: Identify anti-pattern

    Merging overlapping intervals into consolidated time blocks (merging intervals) is not solved by counting overlaps but by merging intervals, so it cannot be solved by minimum platforms pattern.

  3. Final Answer:

    Option B -> Option B

  4. Quick Check:

    Merging intervals ≠ max concurrency counting [OK]
Quick Trick: Merging intervals ≠ max concurrency [OK]
Common Mistakes:
MISTAKES
  • Confusing merging intervals with counting overlaps
Trap Explanation:
PITFALL
  • Candidates often think all interval problems use max overlap pattern, but merging is different.
Interviewer Note:
CONTEXT
  • Tests anti-pattern recognition and understanding of interval problem types.
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