PROBLEMS/INTERVALS

Intervals LeetCode Problems

49 hand-tagged Intervals problems across 2 interview patterns (Interval Merging, Sweep Line / Meeting Rooms), ranked by importance (how often each pattern shows up in real coding interviews). Work top-down within each pattern.

Interval Merging

34 problems →

#	PROBLEM	DIFF	ELO	IMP	PATTERNS
1	Merge Intervals	Easy	1302	93	Sorting + Comparison
2	Non-overlapping Intervals	Medium	1416	88	Sorting + Comparison · Sorting-Based Greedy
3	Partition Labels	Medium	1443	85	Frequency Counting / Hash Map Lookup · Same-Direction (Fast/Slow on Arrays)
4	Insert Interval	Medium	1420	83	Boundary Finding (Bisect Left/Right)
5	Minimum Number of Arrows to Burst Balloons	Easy	1370	82	Sorting + Comparison · Sorting-Based Greedy

+ 29 more Interval Merging problems →

Sweep Line / Meeting Rooms

15 problems →

#	PROBLEM	DIFF	ELO	IMP	PATTERNS
1	Meeting Rooms IIPREMIUM	Medium	1437	91	Heap Simulation · Sorting + Comparison
2	Minimum Interval to Include Each Query	Hard	2286	88	Sorting + Comparison · Heap Simulation
3	Meeting RoomsPREMIUM	Easy	1124	82	Sorting + Comparison
4	Meeting Rooms III	Hard	2093	82	Sorting + Comparison · Heap Simulation
5	Divide Intervals Into Minimum Number of Groups	Medium	1713	79	Sorting + Comparison · Heap Simulation

+ 10 more Sweep Line / Meeting Rooms problems →

EVERY PATTERN

Arrays & Hashing Two Pointers Stack Binary Search Sliding Window Linked List Trees Tries Backtracking Heap / Priority Queue Graphs Core DP Intervals Greedy Advanced Graphs Advanced DP Bit Manipulation Math & Geometry

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