Intervals - Merge Intervals
You are given a list of intervals representing booked meeting times. Which algorithmic pattern is best suited to combine all overlapping intervals into a list of non-overlapping intervals?
You are given a list of intervals representing booked meeting times. Which algorithmic pattern is best suited to combine all overlapping intervals into a list of non-overlapping intervals?
easy🔍 Pattern Recognition Q1 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify the problem goal
The problem requires merging overlapping intervals into non-overlapping ones, which suggests combining intervals based on their start and end times.Step 2: Recognize the suitable pattern
Sorting intervals by their start time allows a linear scan to merge overlapping intervals efficiently, which is the hallmark of the sorting + one pass merge pattern.Final Answer:
Option A -> Option AQuick Check:
Sorting + one pass merge is the canonical approach for merging intervals [OK]
Quick Trick: Sort intervals by start, then merge in one pass [OK]
Common Mistakes:
MISTAKES- Confusing with interval scheduling pattern
- Trying DP unnecessarily
Trap Explanation:
PITFALL- Candidates often confuse merging intervals with interval scheduling, which selects max non-overlapping intervals rather than merging.
Interviewer Note:
CONTEXT- Tests candidate's ability to recognize the correct pattern from problem description.
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