PROBLEMS/BINARY SEARCH

Binary Search LeetCode Problems

150 hand-tagged Binary Search problems across 4 interview patterns (Standard Binary Search, Binary Search on Answer Space, Boundary Finding (Bisect Left/Right), Search in Rotated/Modified Array), ranked by importance (how often each pattern shows up in real coding interviews). Work top-down within each pattern.

Standard Binary Search

19 problems →

#	PROBLEM	DIFF	ELO	IMP	PATTERNS
1	Binary Search	Easy	878	93
2	Search a 2D Matrix	Easy	1257	87
3	Find Peak Element	Easy	1307	82
4	Median of Two Sorted Arrays	Hard	2078	82	Same-Direction (Fast/Slow on Arrays)
5	Single Element in a Sorted Array	Easy	1375	78

+ 14 more Standard Binary Search problems →

Binary Search on Answer Space

86 problems →

#	PROBLEM	DIFF	ELO	IMP	PATTERNS
1	Capacity To Ship Packages Within D Days	Medium	1725	90
2	Koko Eating Bananas	Medium	1766	88	Frequency Counting / Hash Map Lookup
3	Split Array Largest Sum	Hard	2064	88	Linear Recurrence DP · Reachability / Frontier Greedy
4	Minimum Number of Days to Make m Bouquets	Hard	1946	87
5	Find the Smallest Divisor Given a Threshold	Medium	1542	82

+ 81 more Binary Search on Answer Space problems →

Boundary Finding (Bisect Left/Right)

40 problems →

#	PROBLEM	DIFF	ELO	IMP	PATTERNS
1	Find First and Last Position of Element in Sorted Array	Easy	1337	88	Standard Binary Search
2	Time Based Key-Value Store	Medium	1575	88	Frequency Counting / Hash Map Lookup
3	Search Insert Position	Easy	1112	85	Standard Binary Search
4	First Bad Version	Easy	1108	82
5	Successful Pairs of Spells and Potions	Medium	1477	78	Sorting + Comparison

+ 35 more Boundary Finding (Bisect Left/Right) problems →

Search in Rotated/Modified Array

5 problems →

#	PROBLEM	DIFF	ELO	IMP	PATTERNS
1	Search in Rotated Sorted Array	Medium	1450	92	Standard Binary Search
2	Find Minimum in Rotated Sorted Array	Easy	1307	88
3	Search in Rotated Sorted Array II	Medium	1540	72
4	Find in Mountain Array	Hard	1827	72	Standard Binary Search
5	Find Minimum in Rotated Sorted Array II	Medium	1541	62

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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