DSA
Master the patterns
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Medium·1,394
Hard·662
Patterns
Recognize the move
Filter the bank by pattern — each card links into the problem index.
Problem index
Browse problems
Search by title, then refine with facets. Sorted by problem ID.
Difficulty
Facets
11 of 11 matching · 2723 totalSort: id ↑
No.ProblemDifficulty
- 0003Longest Substring Without Repeating CharactersMed
- 0073Set Matrix ZeroesMed
- 0127Word LadderHard
- 0227Sliding Window MaximumHard
- 1696Largest Color Value in a Directed GraphHard
- 1815Operations on TreeMed
- 2148Find Closest Node to Given Two NodesMed
- 2149Longest Cycle in a GraphHard
- 2161Node With Highest Edge ScoreMed
- 3029Longest Subsequence With Decreasing Adjacent DifferenceMed
- 3127Shortest Path in a Weighted TreeHard
All 11 matching problems loaded