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Introduction to Intervals
Last Updated: May 30, 2026
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12 min read
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What Is an Interval?
Core Concepts
Canonical Problem: Merge Intervals (LC 56)
Canonical Problem: Insert Interval (LC 57)
Canonical Problem: Meeting Rooms (LC 252, LC 253)...
Sweep Line Technique
Canonical Problem: Non-overlapping Intervals (LC 4...
Problem Variants
When to Use Interval Techniques
Example Walkthrough 1: Meeting Rooms I (LeetCode 2...
Example Walkthrough 2: Interval List Intersections...
Common Mistakes
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Summary Ranges