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Problems

877 problems

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

877 results

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TitleSolutionAcceptDifficultyTopics
591. Tag ValidatorVideo
Solution41.7%Hard
Stack, String· 2 companies
592. Fraction Addition and SubtractionVideo
Solution66.6%Medium
Math, Simulation +1· 5 companies
599. Minimum Index Sum of Two ListsVideo
Solution60.8%Easy
Array, Hash Table +1· 4 companies
604. Design Compressed String IteratorVideoPremium
Solution40.5%Easy
Array, Design +2· 1 company
606. Construct String from Binary TreeVideo
Solution70.6%Medium
Binary Tree, Depth-First Search +2· 3 companies
609. Find Duplicate File in SystemVideo
Solution67.6%Medium
Array, Hash Table +1· 7 companies
616. Add Bold Tag in StringVideoPremium
Solution51.4%Medium
Array, Hash Table +3· 4 companies
635. Design Log Storage SystemVideoPremium
Solution59.8%Medium
Design, Hash Table +2· 4 companies
639. Decode Ways IIVideo
Solution32.4%Hard
Dynamic Programming, String· 3 companies
640. Solve the EquationVideo
Solution46.7%Medium
Math, Simulation +1· 2 companies
642. Design Search Autocomplete SystemVideoPremium
Solution49.9%Hard
Data Stream, Depth-First Search +5· 12 companies
647. Palindromic SubstringsVideo
Solution73.2%Medium
Dynamic Programming, String +1· 25 companies
648. Replace WordsVideo
Solution68.7%Medium
Array, Hash Table +2· 4 companies
649. Dota2 SenateVideo
Solution50.3%Medium
Greedy, Queue +1· 6 companies
657. Robot Return to OriginVideo
Solution78.0%Easy
Simulation, String· 5 companies
664. Strange PrinterVideo
Solution61.0%Hard
Dynamic Programming, String· 9 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
680. Valid Palindrome IIVideo
Solution44.7%Easy
Greedy, String +1· 16 companies
681. Next Closest TimeVideoPremium
Solution46.8%Medium
Backtracking, Enumeration +2· 1 company
686. Repeated String MatchVideo
Solution39.7%Medium
String, String Matching· 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
696. Count Binary SubstringsVideo
Solution70.3%Easy
String, Two Pointers· 18 companies
709. To Lower CaseVideo
Solution84.8%Easy
String· 3 companies
712. Minimum ASCII Delete Sum for Two StringsVideo
Solution70.9%Medium
Dynamic Programming, String· 4 companies
720. Longest Word in DictionaryVideo
Solution55.2%Medium
Array, Hash Table +3· 3 companies
721. Accounts MergeVideo
Solution62.2%Medium
Array, Breadth-First Search +5· 17 companies
722. Remove CommentsVideo
Solution40.1%Medium
Array, String· 4 companies
726. Number of AtomsVideo
Solution65.1%Hard
Hash Table, Sorting +2· 8 companies
727. Minimum Window SubsequenceVideoPremium
Solution43.5%Hard
Dynamic Programming, Sliding Window +1· 5 companies
730. Count Different Palindromic SubsequencesVideo
Solution48.2%Hard
Dynamic Programming, String· 4 companies
734. Sentence SimilarityVideoPremium
Solution44.5%Easy
Array, Hash Table +1· 1 company
736. Parse Lisp ExpressionVideo
Solution54.1%Hard
Hash Table, Recursion +2· 4 companies
737. Sentence Similarity IIVideoPremium
Solution51.2%Medium
Array, Breadth-First Search +4· 4 companies
745. Prefix and Suffix SearchVideo
Solution41.2%Hard
Array, Design +3· 3 companies
748. Shortest Completing WordVideo
Solution63.5%Easy
Array, Hash Table +1· 1 company
751. IP to CIDRVideoPremium
–53.7%Medium
Bit Manipulation, String· 4 companies
752. Open the LockVideo
Solution61.2%Medium
Array, Breadth-First Search +2· 15 companies
758. Bold Words in StringVideoPremium
Solution53.2%Medium
Array, Hash Table +3· 1 company
761. Special Binary StringVideo
Solution79.4%Hard
Recursion, String· 12 companies
763. Partition LabelsVideo
Solution81.8%Medium
Greedy, Hash Table +2· 9 companies
767. Reorganize StringVideo
Solution57.5%Medium
Counting, Greedy +4· 20 companies
770. Basic Calculator IVVideo
Solution49.8%Hard
Hash Table, Math +3· 3 companies
771. Jewels and StonesVideo
Solution89.5%Easy
Hash Table, String· 6 companies
772. Basic Calculator IIIVideoPremium
Solution53.2%Hard
Math, Recursion +2· 16 companies
777. Swap Adjacent in LR StringVideo
Solution38.5%Medium
String, Two Pointers· 3 companies
784. Letter Case PermutationVideo
Solution75.7%Medium
Backtracking, Bit Manipulation +1· 7 companies
791. Custom Sort StringVideo
Solution72.3%Medium
Hash Table, Sorting +1· 5 companies
Showing 151–200 of 877