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Problems

4,005 problems

Has videoPremium onlyReset
Array2,209String870Hash Table786Math682Dynamic Programming666Sorting504Greedy480Binary Search352Depth-First Search335Database303Bit Manipulation283Matrix278Tree261Breadth-First Search255Two Pointers249All topics

With video · 4,005 results

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TitleSolutionAcceptDifficultyTopics
649. Dota2 SenateVideo
Solution50.3%Medium
Greedy, Queue +1· 6 companies
650. 2 Keys KeyboardVideo
Solution59.6%Medium
Dynamic Programming, Math· 7 companies
651. 4 Keys KeyboardVideoPremium
Solution56.5%Medium
Dynamic Programming, Math· 2 companies
652. Find Duplicate SubtreesVideo
Solution60.6%Medium
Binary Tree, Depth-First Search +2· 8 companies
653. Two Sum IV - Input is a BSTVideo
Solution63.7%Easy
Binary Search Tree, Binary Tree +5· 8 companies
654. Maximum Binary TreeVideo
Solution86.3%Medium
Array, Binary Tree +4· 3 companies
655. Print Binary TreeVideo
Solution67.1%Medium
Binary Tree, Breadth-First Search +2· 5 companies
656. Coin PathVideoPremium
Solution34.2%Hard
Array, Dynamic Programming· 1 company
657. Robot Return to OriginVideo
Solution78.0%Easy
Simulation, String· 5 companies
658. Find K Closest ElementsVideo
Solution50.1%Medium
Array, Binary Search +4· 18 companies
659. Split Array into Consecutive SubsequencesVideo
Solution52.7%Medium
Array, Greedy +2· 2 companies
660. Remove 9VideoPremium
–57.3%Hard
Math· 1 company
661. Image SmootherVideo
Solution69.8%Easy
Array, Matrix· 6 companies
662. Maximum Width of Binary TreeVideo
Solution46.0%Medium
Binary Tree, Breadth-First Search +2· 8 companies
663. Equal Tree PartitionVideoPremium
Solution42.3%Medium
Binary Tree, Depth-First Search +1· 1 company
664. Strange PrinterVideo
Solution61.0%Hard
Dynamic Programming, String· 9 companies
665. Non-decreasing ArrayVideo
Solution25.5%Medium
Array· 6 companies
666. Path Sum IVVideoPremium
Solution62.5%Medium
Array, Binary Tree +3· 1 company
667. Beautiful Arrangement IIVideo
Solution61.1%Medium
Array, Math· 2 companies
668. Kth Smallest Number in Multiplication TableVideo
Solution55.1%Hard
Binary Search, Math· 5 companies
669. Trim a Binary Search TreeVideo
Solution66.9%Medium
Binary Search Tree, Binary Tree +2· 4 companies
670. Maximum SwapVideo
Solution51.6%Medium
Greedy, Math· 9 companies
671. Second Minimum Node In a Binary TreeVideo
Solution46.0%Easy
Binary Tree, Depth-First Search +1· 2 companies
672. Bulb Switcher IIVideo
Solution51.2%Medium
Bit Manipulation, Breadth-First Search +2· 1 company
673. Number of Longest Increasing SubsequenceVideo
Solution52.8%Medium
Array, Binary Indexed Tree +2· 6 companies
674. Longest Continuous Increasing SubsequenceVideo
Solution52.5%Easy
Array· 5 companies
675. Cut Off Trees for Golf EventVideo
Solution36.8%Hard
Array, Breadth-First Search +2· 2 companies
676. Implement Magic DictionaryVideo
Solution57.8%Medium
Depth-First Search, Design +3· 2 companies
677. Map Sum PairsVideo
Solution57.4%Medium
Design, Hash Table +2· 3 companies
678. Valid Parenthesis StringVideo
Solution42.8%Medium
Dynamic Programming, Greedy +2· 15 companies
679. 24 GameVideo
Solution59.4%Hard
Array, Backtracking +1· 7 companies
680. Valid Palindrome IIVideo
Solution44.7%Easy
Greedy, String +1· 16 companies
681. Next Closest TimeVideoPremium
Solution46.8%Medium
Backtracking, Enumeration +2· 1 company
682. Baseball GameVideo
Solution80.8%Easy
Array, Simulation +1· 6 companies
683. K Empty SlotsVideoPremium
Solution38.0%Hard
Array, Binary Indexed Tree +6· 1 company
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
686. Repeated String MatchVideo
Solution39.7%Medium
String, String Matching· 6 companies
687. Longest Univalue PathVideo
Solution44.3%Medium
Binary Tree, Depth-First Search +1· 7 companies
688. Knight Probability in ChessboardVideo
Solution57.0%Medium
Dynamic Programming· 6 companies
689. Maximum Sum of 3 Non-Overlapping SubarraysVideo
Solution59.8%Hard
Array, Dynamic Programming· 6 companies
690. Employee ImportanceVideo
Solution69.4%Medium
Array, Breadth-First Search +3· 6 companies
691. Stickers to Spell WordVideo
Solution51.3%Hard
Array, Backtracking +4· 4 companies
692. Top K Frequent WordsVideo
Solution60.6%Medium
Bucket Sort, Counting +5· 23 companies
693. Binary Number with Alternating BitsVideo
Solution69.8%Easy
Bit Manipulation· 5 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
696. Count Binary SubstringsVideo
Solution70.3%Easy
String, Two Pointers· 18 companies
697. Degree of an ArrayVideo
Solution58.8%Easy
Array, Hash Table· 12 companies
698. Partition to K Equal Sum SubsetsVideo
Solution38.6%Medium
Array, Backtracking +4· 8 companies
Showing 651–700 of 4,005