Intervals - Remove Covered Intervals
You are given a list of intervals and need to count how many intervals remain after removing all intervals that are fully covered by another. Which algorithmic pattern best fits this problem?
You are given a list of intervals and need to count how many intervals remain after removing all intervals that are fully covered by another. Which algorithmic pattern best fits this problem?
easy🔍 Pattern Recognition Q1 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify problem requirements
The problem requires removing intervals covered by others, which means containment checks.Step 2: Recognize pattern
Sorting intervals by start ascending and end descending allows a single pass to detect coverage efficiently.Final Answer:
Option D -> Option DQuick Check:
Sorting + single pass is classic for coverage problems [OK]
Quick Trick: Sort by start asc, end desc to detect coverage [OK]
Common Mistakes:
MISTAKES- Confusing coverage with overlap
- Using graph traversal unnecessarily
Trap Explanation:
PITFALL- Many candidates confuse coverage with overlap and pick graph or DP approaches incorrectly.
Interviewer Note:
CONTEXT- Tests candidate's ability to recognize interval coverage pattern.
Master "Remove Covered Intervals" in Intervals
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Intervals Quizzes