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464 problems

Has videoPremium onlyReset
Array194Database104Hash Table83String71Depth-First Search57Dynamic Programming49Tree48Math45Sorting43Breadth-First Search40Greedy40Binary Tree38Binary Search31Two Pointers29Matrix28All topics

Medium · Premium · 464 results

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TitleSolutionAcceptDifficultyTopics
426. Convert Binary Search Tree to Sorted Doubly Linked ListVideoPremium
Solution65.2%Medium
Binary Search Tree, Binary Tree +5· 4 companies
439. Ternary Expression ParserVideoPremium
Solution62.6%Medium
Recursion, Stack +1· 1 company
444. Sequence ReconstructionVideoPremium
Solution31.2%Medium
Array, Graph +1· 2 companies
469. Convex PolygonVideoPremium
Solution40.3%Medium
Array, Geometry +1· 1 company
484. Find PermutationVideoPremium
Solution67.0%Medium
Array, Greedy +2· 1 company
487. Max Consecutive Ones IIVideoPremium
Solution52.0%Medium
Array, Dynamic Programming +1· 4 companies
490. The MazeVideoPremium
Solution60.4%Medium
Array, Breadth-First Search +2· 13 companies
505. The Maze IIVideoPremium
Solution55.0%Medium
Array, Breadth-First Search +5· 5 companies
510. Inorder Successor in BST IIVideoPremium
Solution60.9%Medium
Binary Search Tree, Binary Tree +1· 3 companies
531. Lonely Pixel IVideoPremium
Solution62.3%Medium
Array, Hash Table +1· 1 company
533. Lonely Pixel IIVideoPremium
Solution48.7%Medium
Array, Hash Table +1· 1 company
534. Game Play Analysis IIIVideoPremium
Solution81.0%Medium
Database· 1 company
536. Construct Binary Tree from StringVideoPremium
Solution58.7%Medium
Binary Tree, Depth-First Search +3· 3 companies
544. Output Contest MatchesVideoPremium
Solution77.3%Medium
Recursion, Simulation +1· 1 company
545. Boundary of Binary TreeVideoPremium
Solution48.0%Medium
Binary Tree, Depth-First Search +1· 10 companies
549. Binary Tree Longest Consecutive Sequence IIVideoPremium
Solution50.1%Medium
Binary Tree, Depth-First Search +1· 3 companies
555. Split Concatenated StringsVideoPremium
Solution43.4%Medium
Array, Greedy +1· 1 company
562. Longest Line of Consecutive One in MatrixVideoPremium
Solution50.5%Medium
Array, Dynamic Programming +1· 1 company
573. Squirrel SimulationVideoPremium
Solution57.1%Medium
Array, Math· 1 company
574. Winning CandidateVideoPremium
Solution62.8%Medium
Database
578. Get Highest Answer Rate QuestionVideoPremium
Solution40.2%Medium
Database· 1 company
580. Count Student Number in DepartmentsVideoPremium
Solution60.1%Medium
Database· 1 company
582. Kill ProcessVideoPremium
Solution70.4%Medium
Array, Breadth-First Search +3· 4 companies
612. Shortest Distance in a PlaneVideoPremium
Solution61.3%Medium
Database· 1 company
614. Second Degree FollowerVideoPremium
Solution41.0%Medium
Database
616. Add Bold Tag in StringVideoPremium
Solution51.4%Medium
Array, Hash Table +3· 4 companies
625. Minimum FactorizationVideoPremium
Solution34.2%Medium
Greedy, Math· 1 company
634. Find the Derangement of An ArrayVideoPremium
Solution41.9%Medium
Dynamic Programming, Math· 1 company
635. Design Log Storage SystemVideoPremium
Solution59.8%Medium
Design, Hash Table +2· 4 companies
651. 4 Keys KeyboardVideoPremium
Solution56.5%Medium
Dynamic Programming, Math· 2 companies
663. Equal Tree PartitionVideoPremium
Solution42.3%Medium
Binary Tree, Depth-First Search +1· 1 company
666. Path Sum IVVideoPremium
Solution62.5%Medium
Array, Binary Tree +3· 1 company
681. Next Closest TimeVideoPremium
Solution46.8%Medium
Backtracking, Enumeration +2· 1 company
694. Number of Distinct IslandsVideoPremium
Solution62.8%Medium
Breadth-First Search, Depth-First Search +3· 12 companies
702. Search in a Sorted Array of Unknown SizeVideoPremium
Solution73.1%Medium
Array, Binary Search +1· 1 company
708. Insert into a Sorted Circular Linked ListVideoPremium
Solution38.5%Medium
Linked List· 4 companies
723. Candy CrushVideoPremium
Solution77.6%Medium
Array, Matrix +2· 11 companies
737. Sentence Similarity IIVideoPremium
Solution51.2%Medium
Array, Breadth-First Search +4· 4 companies
742. Closest Leaf in a Binary TreeVideoPremium
Solution47.4%Medium
Binary Tree, Breadth-First Search +2· 3 companies
750. Number Of Corner RectanglesVideoPremium
Solution67.8%Medium
Array, Dynamic Programming +2· 1 company
751. IP to CIDRVideoPremium
–53.7%Medium
Bit Manipulation, String· 4 companies
755. Pour WaterVideoPremium
Solution49.1%Medium
Array, Simulation· 2 companies
758. Bold Words in StringVideoPremium
Solution53.2%Medium
Array, Hash Table +3· 1 company
776. Split BSTVideoPremium
Solution82.5%Medium
Binary Search Tree, Binary Tree +2· 2 companies
1055. Shortest Way to Form StringVideoPremium
Solution61.6%Medium
Binary Search, Greedy +2· 3 companies
1057. Campus BikesVideoPremium
Solution58.8%Medium
Array, Greedy +1· 3 companies
1058. Minimize Rounding Error to Meet TargetVideoPremium
Solution45.9%Medium
Array, Greedy +3· 1 company
1059. All Paths from Source Lead to DestinationVideoPremium
Solution37.2%Medium
Graph, Topological Sort· 1 company
1060. Missing Element in Sorted ArrayVideoPremium
Solution59.7%Medium
Array, Binary Search· 4 companies
1062. Longest Repeating SubstringVideoPremium
Solution63.4%Medium
Binary Search, Dynamic Programming +4· 4 companies
Showing 51–100 of 464