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Array447 String248 Hash Table189 Math173 Database113 Sorting100 Simulation93 Two Pointers70 Counting69 Bit Manipulation54 Greedy51 Matrix41 Tree40 Depth-First Search39 Binary Tree37 All topics

Easy · With video · 970 results

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TitleSolutionAcceptDifficultyTopics

415. Add StringsVideo

Solution52.1%Easy

Math, Simulation +1· 14 companies

422. Valid Word SquareVideoPremium

Solution42.9%Easy

Array, Matrix· 1 company

434. Number of Segments in a StringVideo

Solution37.6%Easy

String· 3 companies

441. Arranging CoinsVideo

Solution48.7%Easy

Binary Search, Math· 6 companies

448. Find All Numbers Disappeared in an ArrayVideo

Solution64.4%Easy

Array, Hash Table· 7 companies

455. Assign CookiesVideo

Solution55.4%Easy

Array, Greedy +2· 9 companies

459. Repeated Substring PatternVideo

Solution48.6%Easy

String, String Matching· 9 companies

461. Hamming DistanceVideo

Solution76.7%Easy

Bit Manipulation· 4 companies

463. Island PerimeterVideo

Solution74.3%Easy

Array, Breadth-First Search +2· 9 companies

476. Number ComplementVideo

Solution70.3%Easy

Bit Manipulation· 5 companies

482. License Key FormattingVideo

Solution46.4%Easy

String· 1 company

485. Max Consecutive OnesVideo

Solution66.0%Easy

Array· 14 companies

492. Construct the RectangleVideo

Solution65.2%Easy

Math· 2 companies

495. Teemo AttackingVideo

Solution58.2%Easy

Array, Simulation· 5 companies

496. Next Greater Element IVideo

Solution76.5%Easy

Array, Hash Table +2· 17 companies

500. Keyboard RowVideo

Solution74.3%Easy

Array, Hash Table +1· 4 companies

501. Find Mode in Binary Search TreeVideo

Solution59.2%Easy

Binary Search Tree, Binary Tree +2· 4 companies

504. Base 7Video

Solution55.3%Easy

Math· 4 companies

506. Relative RanksVideo

Solution75.1%Easy

Array, Heap (Priority Queue) +1· 4 companies

507. Perfect NumberVideo

Solution50.6%Easy

Math· 8 companies

509. Fibonacci NumberVideo

Solution74.6%Easy

Dynamic Programming, Math +2· 16 companies

511. Game Play Analysis IVideo

Solution76.8%Easy

Database· 6 companies

512. Game Play Analysis IIVideoPremium

Solution54.9%Easy

Database· 2 companies

520. Detect CapitalVideo

Solution56.8%Easy

String· 4 companies

521. Longest Uncommon Subsequence IVideo

Solution62.7%Easy

String· 2 companies

530. Minimum Absolute Difference in BSTVideo

Solution59.3%Easy

Binary Search Tree, Binary Tree +3· 3 companies

541. Reverse String IIVideo

Solution54.7%Easy

String, Two Pointers· 7 companies

543. Diameter of Binary TreeVideo

Solution66.4%Easy

Binary Tree, Depth-First Search +1· 20 companies

551. Student Attendance Record IVideo

Solution50.1%Easy

String· 3 companies

557. Reverse Words in a String IIIVideo

Solution84.0%Easy

String, Two Pointers· 7 companies

559. Maximum Depth of N-ary TreeVideo

Solution73.5%Easy

Breadth-First Search, Depth-First Search +1· 2 companies

561. Array PartitionVideo

Solution82.2%Easy

Array, Counting Sort +2· 5 companies

563. Binary Tree TiltVideo

Solution66.2%Easy

Binary Tree, Depth-First Search +1· 3 companies

566. Reshape the MatrixVideo

Solution65.4%Easy

Array, Matrix +1· 5 companies

572. Subtree of Another TreeVideo

Solution52.0%Easy

Binary Tree, Depth-First Search +3· 8 companies

575. Distribute CandiesVideo

Solution71.5%Easy

Array, Hash Table· 3 companies

577. Employee BonusVideo

Solution78.3%Easy

Database· 7 companies

584. Find Customer RefereeVideo

Solution73.7%Easy

Database· 7 companies

586. Customer Placing the Largest Number of OrdersVideo

Solution64.6%Easy

Database· 4 companies

589. N-ary Tree Preorder TraversalVideo

Solution76.7%Easy

Depth-First Search, Stack +1· 2 companies

590. N-ary Tree Postorder TraversalVideo

Solution81.0%Easy

Depth-First Search, Stack +1· 3 companies

594. Longest Harmonious SubsequenceVideo

Solution65.1%Easy

Array, Counting +3· 7 companies

595. Big CountriesVideo

Solution69.0%Easy

Database· 5 companies

596. Classes More Than 5 StudentsVideo

Solution58.4%Easy

596. Classes With at Least 5 StudentsVideo

Solution65.2%Easy

Database· 3 companies

597. Friend Requests I: Overall Acceptance RateVideoPremium

Solution41.0%Easy

Database· 1 company

598. Range Addition IIVideo

Solution59.1%Easy

Array, Math· 3 companies

599. Minimum Index Sum of Two ListsVideo

Solution60.8%Easy

Array, Hash Table +1· 4 companies

603. Consecutive Available SeatsVideoPremium

Solution64.9%Easy

604. Design Compressed String IteratorVideoPremium

Solution40.5%Easy

Array, Design +2· 1 company

Showing 101–150 of 970