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Problems

703 problems

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Array274Database207String109Hash Table105Depth-First Search75Math70Dynamic Programming69Sorting61Tree60Breadth-First Search51Binary Tree47Greedy47Binary Search46Matrix38Two Pointers37All topics

With video · Premium · 703 results

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TitleSolutionAcceptDifficultyTopics
323. Number of Connected Components in an Undirected GraphVideoPremium
Solution64.9%Medium
Breadth-First Search, Depth-First Search +2· 7 companies
325. Maximum Size Subarray Sum Equals kVideoPremium
Solution50.8%Medium
Array, Hash Table +1· 8 companies
333. Largest BST SubtreeVideoPremium
Solution45.8%Medium
Binary Search Tree, Binary Tree +3· 2 companies
339. Nested List Weight SumVideoPremium
Solution85.9%Medium
Breadth-First Search, Depth-First Search· 6 companies
340. Longest Substring with At Most K Distinct CharactersVideoPremium
Solution49.9%Medium
Hash Table, Sliding Window +1· 12 companies
346. Moving Average from Data StreamVideoPremium
Solution80.2%Easy
Array, Data Stream +2· 11 companies
348. Design Tic-Tac-ToeVideoPremium
Solution58.8%Medium
Array, Design +3· 13 companies
351. Android Unlock PatternsVideoPremium
Solution53.8%Medium
Backtracking, Bit Manipulation +2· 1 company
353. Design Snake GameVideoPremium
Solution40.0%Medium
Array, Design +3· 10 companies
356. Line ReflectionVideoPremium
Solution36.3%Medium
Array, Hash Table +1· 2 companies
358. Rearrange String k Distance ApartVideoPremium
Solution39.9%Hard
Counting, Greedy +4· 4 companies
359. Logger Rate LimiterVideoPremium
Solution76.8%Easy
Data Stream, Design +1· 21 companies
360. Sort Transformed ArrayVideoPremium
Solution58.0%Medium
Array, Math +2· 3 companies
361. Bomb EnemyVideoPremium
Solution52.8%Medium
Array, Dynamic Programming +1· 2 companies
362. Design Hit CounterVideoPremium
Solution69.6%Medium
Array, Binary Search +3· 25 companies
364. Nested List Weight Sum IIVideoPremium
Solution66.8%Medium
Breadth-First Search, Depth-First Search +1· 3 companies
366. Find Leaves of Binary TreeVideoPremium
Solution81.4%Medium
Binary Tree, Depth-First Search +1· 6 companies
369. Plus One Linked ListVideoPremium
Solution61.1%Medium
Linked List, Math· 2 companies
370. Range AdditionVideoPremium
Solution73.0%Medium
Array, Prefix Sum· 2 companies
379. Design Phone DirectoryVideoPremium
Solution53.3%Medium
Array, Design +3· 1 company
408. Valid Word AbbreviationVideoPremium
Solution37.0%Easy
String, Two Pointers· 7 companies
411. Minimum Unique Word AbbreviationVideoPremium
–40.5%Hard
Array, Backtracking +2· 2 companies
418. Sentence Screen FittingVideoPremium
Solution36.3%Medium
Array, Dynamic Programming +1· 1 company
422. Valid Word SquareVideoPremium
Solution42.9%Easy
Array, Matrix· 1 company
425. Word SquaresVideoPremium
Solution54.7%Hard
Array, Backtracking +2· 1 company
426. Convert Binary Search Tree to Sorted Doubly Linked ListVideoPremium
Solution65.2%Medium
Binary Search Tree, Binary Tree +5· 4 companies
428. Serialize and Deserialize N-ary TreeVideoPremium
Solution68.7%Hard
Breadth-First Search, Depth-First Search +2· 7 companies
431. Encode N-ary Tree to Binary TreeVideoPremium
Solution80.6%Hard
Binary Tree, Breadth-First Search +3
439. Ternary Expression ParserVideoPremium
Solution62.6%Medium
Recursion, Stack +1· 1 company
444. Sequence ReconstructionVideoPremium
Solution31.2%Medium
Array, Graph +1· 2 companies
465. Optimal Account BalancingVideoPremium
Solution50.9%Hard
Array, Backtracking +3· 12 companies
469. Convex PolygonVideoPremium
Solution40.3%Medium
Array, Geometry +1· 1 company
471. Encode String with Shortest LengthVideoPremium
Solution50.5%Hard
Dynamic Programming, String· 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
489. Robot Room CleanerVideoPremium
Solution77.9%Hard
Backtracking, Interactive· 7 companies
490. The MazeVideoPremium
Solution60.4%Medium
Array, Breadth-First Search +2· 13 companies
499. The Maze IIIVideoPremium
Solution52.3%Hard
Array, Breadth-First Search +6· 1 company
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
512. Game Play Analysis IIVideoPremium
Solution54.9%Easy
Database· 2 companies
527. Word AbbreviationVideoPremium
Solution62.7%Hard
Array, Greedy +3· 4 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
548. Split Array with Equal SumVideoPremium
Solution50.1%Hard
Array, Hash Table +1· 1 company
549. Binary Tree Longest Consecutive Sequence IIVideoPremium
Solution50.1%Medium
Binary Tree, Depth-First Search +1· 3 companies
Showing 51–100 of 703