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 21 matching · 2723 totalSort: id ↑
No.ProblemDifficulty
- 0011Container With Most WaterMed
- 00153SumMed
- 0031Next PermutationMed
- 0042Trapping Rain WaterHard
- 0045Jump Game IIMed
- 0049Group AnagramsMed
- 0053Maximum SubarrayMed
- 0055Jump GameMed
- 0072Edit DistanceMed
- 0121Best Time to Buy and Sell StockEasy
- 0152Maximum Product SubarrayMed
- 0188Number of IslandsMed
- 0193Isomorphic StringsEasy
- 0511Beautiful ArrangementMed
- 0764Chalkboard XOR GameHard
- 0829Koko Eating BananasMed
- 2232Minimum Cost to Make Array EqualHard
- 2374Minimum Time to Repair CarsMed
- 2667Count the Number of Powerful IntegersHard
- 2680Minimize Length of Array Using OperationsMed
Showing 20 of 21