DSA
Master the patterns
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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
13 of 13 matching · 2723 totalSort: id ↑
No.ProblemDifficulty
- 0068Text JustificationHard
- 0121Best Time to Buy and Sell StockEasy
- 0334Top K Frequent ElementsMed
- 0514MinesweeperMed
- 0644Employee ImportanceMed
- 0646Top K Frequent WordsMed
- 1048Defanging an IP AddressEasy
- 1289Check if There is a Valid Path in a GridMed
- 1544Count the Number of Consistent StringsEasy
- 1568Count Good MealsMed
- 1569Ways to Split Array Into Three SubarraysMed
- 1596Restore the Array From Adjacent PairsMed
- 1647Number of Orders in the BacklogMed
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