DSA
Master the patterns
Search the bank, then filter by difficulty, pattern, data structure, or algorithm. Each problem includes approaches, solutions, and walkthroughs.
Active·2,723
Easy·667
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
12 of 12 matching · 2723 totalSort: id ↑
No.ProblemDifficulty
- 0139Word BreakMed
- 0196Implement Trie (Prefix Tree)Med
- 0200Word Search IIHard
- 0260Integer to English WordsHard
- 0653Falling SquaresHard
- 0923Pancake SortingMed
- 0953Available Captures for RookEasy
- 1658Count Nice Pairs in an ArrayMed
- 1700Rotating the BoxMed
- 1884Walking Robot Simulation IIMed
- 2093Design a Text EditorHard
- 2485Number of Black BlocksMed
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