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Problems

257 problems

Has videoPremium onlyReset
Array2,237String877Hash Table797Math691Dynamic Programming673Sorting508Greedy485Binary Search357Depth-First Search338Database308Bit Manipulation286Matrix279Tree264Breadth-First Search257Prefix Sum252All topics

257 results

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TitleSolutionAcceptDifficultyTopics
514. Freedom TrailVideo
Solution59.4%Hard
Breadth-First Search, Depth-First Search +2· 3 companies
515. Find Largest Value in Each Tree RowVideo
Solution66.3%Medium
Binary Tree, Breadth-First Search +2· 8 companies
529. MinesweeperVideo
Solution68.7%Medium
Array, Breadth-First Search +2· 9 companies
530. Minimum Absolute Difference in BSTVideo
Solution59.3%Easy
Binary Search Tree, Binary Tree +3· 3 companies
542. 01 MatrixVideo
Solution54.7%Medium
Array, Breadth-First Search +2· 14 companies
547. Number of ProvincesVideo
Solution70.8%Medium
Breadth-First Search, Depth-First Search +2· 9 companies
559. Maximum Depth of N-ary TreeVideo
Solution73.5%Easy
Breadth-First Search, Depth-First Search +1· 2 companies
582. Kill ProcessVideoPremium
Solution70.4%Medium
Array, Breadth-First Search +3· 4 companies
617. Merge Two Binary TreesVideo
Solution79.2%Easy
Binary Tree, Breadth-First Search +2· 8 companies
623. Add One Row to TreeVideo
Solution64.1%Medium
Binary Tree, Breadth-First Search +2· 3 companies
637. Average of Levels in Binary TreeVideo
Solution74.8%Easy
Binary Tree, Breadth-First Search +2· 4 companies
653. Two Sum IV - Input is a BSTVideo
Solution63.7%Easy
Binary Search Tree, Binary Tree +5· 8 companies
655. Print Binary TreeVideo
Solution67.1%Medium
Binary Tree, Breadth-First Search +2· 5 companies
662. Maximum Width of Binary TreeVideo
Solution46.0%Medium
Binary Tree, Breadth-First Search +2· 8 companies
672. Bulb Switcher IIVideo
Solution51.2%Medium
Bit Manipulation, Breadth-First Search +2· 1 company
675. Cut Off Trees for Golf EventVideo
Solution36.8%Hard
Array, Breadth-First Search +2· 2 companies
684. Redundant ConnectionVideo
Solution68.0%Medium
Breadth-First Search, Depth-First Search +2· 8 companies
685. Redundant Connection IIVideo
Solution36.6%Hard
Breadth-First Search, Depth-First Search +2· 1 company
690. Employee ImportanceVideo
Solution69.4%Medium
Array, Breadth-First Search +3· 6 companies
694. Number of Distinct IslandsVideoPremium
Solution62.8%Medium
Breadth-First Search, Depth-First Search +3· 12 companies
695. Max Area of IslandVideo
Solution73.9%Medium
Array, Breadth-First Search +3· 20 companies
711. Number of Distinct Islands IIVideoPremium
Solution55.3%Hard
Breadth-First Search, Depth-First Search +3· 2 companies
721. Accounts MergeVideo
Solution62.2%Medium
Array, Breadth-First Search +5· 17 companies
733. Flood FillVideo
Solution68.6%Easy
Array, Breadth-First Search +2· 12 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
743. Network Delay TimeVideo
Solution61.7%Medium
Breadth-First Search, Depth-First Search +3· 9 companies
749. Contain VirusVideo
Solution56.5%Hard
Array, Breadth-First Search +3· 3 companies
752. Open the LockVideo
Solution61.2%Medium
Array, Breadth-First Search +2· 15 companies
756. Pyramid Transition MatrixVideo
Solution60.6%Medium
Bit Manipulation, Breadth-First Search +1· 3 companies
765. Couples Holding HandsVideo
Solution59.8%Hard
Breadth-First Search, Depth-First Search +3· 5 companies
773. Sliding PuzzleVideo
Solution74.3%Hard
Array, Backtracking +4· 7 companies
778. Swim in Rising WaterVideo
Solution68.3%Hard
Array, Binary Search +5· 8 companies
783. Minimum Distance Between BST NodesVideo
Solution61.8%Easy
Binary Search Tree, Binary Tree +3· 4 companies
785. Is Graph Bipartite?Video
Solution59.6%Medium
Breadth-First Search, Depth-First Search +2· 11 companies
787. Cheapest Flights Within K StopsVideo
Solution42.7%Medium
Breadth-First Search, Depth-First Search +4· 18 companies
797. All Paths From Source to TargetVideo
Solution83.6%Medium
Backtracking, Breadth-First Search +2· 5 companies
802. Find Eventual Safe StatesVideo
Solution71.6%Medium
Breadth-First Search, Depth-First Search +2· 7 companies
815. Bus RoutesVideo
Solution47.3%Hard
Array, Breadth-First Search +1· 18 companies
827. Making A Large IslandVideo
Solution57.0%Hard
Array, Breadth-First Search +3· 16 companies
839. Similar String GroupsVideo
Solution56.7%Hard
Array, Breadth-First Search +4· 5 companies
841. Keys and RoomsVideo
Solution76.2%Medium
Breadth-First Search, Depth-First Search +1· 10 companies
847. Shortest Path Visiting All NodesVideo
Solution66.5%Hard
Bit Manipulation, Bitmask +3· 4 companies
854. K-Similar StringsVideo
Solution41.3%Hard
Breadth-First Search, String· 2 companies
863. All Nodes Distance K in Binary TreeVideo
Solution68.1%Medium
Binary Tree, Breadth-First Search +3· 16 companies
864. Shortest Path to Get All KeysVideo
Solution55.0%Hard
Array, Bit Manipulation +2· 7 companies
865. Smallest Subtree with all the Deepest NodesVideo
Solution77.5%Medium
Binary Tree, Breadth-First Search +3· 4 companies
886. Possible BipartitionVideo
Solution53.0%Medium
Breadth-First Search, Depth-First Search +2· 11 companies
909. Snakes and LaddersVideo
Solution48.0%Medium
Array, Breadth-First Search +1· 12 companies
919. Complete Binary Tree InserterVideo
Solution65.0%Medium
Binary Tree, Breadth-First Search +2· 3 companies
Showing 51–100 of 257