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
20 of 185 matching · 2723 totalSort: id ↑
No.ProblemDifficulty
- 0197Minimum Size Subarray SumMed
- 0226Product of Array Except SelfMed
- 0290Range Sum Query - ImmutableEasy
- 0291Range Sum Query 2D - ImmutableMed
- 0350Max Sum of Rectangle No Larger Than KHard
- 0397Split Array Largest SumHard
- 0484Random Point in Non-overlapping RectanglesMed
- 0508Continuous Subarray SumMed
- 0510Contiguous ArrayMed
- 0513Random Pick with WeightMed
- 0543Subarray Sum Equals KMed
- 0643Maximum Sum of 3 Non-Overlapping SubarraysHard
- 0667Subarray Product Less Than KMed
- 0678Find Pivot IndexEasy
- 0685My Calendar IIMed
- 0686My Calendar IIIHard
- 0752Smallest Rotation with Highest ScoreHard
- 0767Largest Sum of AveragesMed
- 0802Shifting LettersMed
- 0816Shortest Subarray with Sum at Least KHard
Showing 20 of 185