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Problems

1,212 problems

Has videoPremium onlyReset
Array1,212Hash Table473String437Math331Greedy330Dynamic Programming327Sorting302Depth-First Search208Binary Search189Breadth-First Search166Matrix163Tree158Prefix Sum155Two Pointers150Database137All topics

Medium · 1,212 results

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TitleSolutionAcceptDifficultyTopics
373. Find K Pairs with Smallest SumsVideo
Solution42.3%Medium
Array, Heap (Priority Queue)· 10 companies
376. Wiggle SubsequenceVideo
Solution49.9%Medium
Array, Dynamic Programming +1· 1 company
377. Combination Sum IVVideo
Solution55.0%Medium
Array, Dynamic Programming· 7 companies
378. Kth Smallest Element in a Sorted MatrixVideo
Solution65.1%Medium
Array, Binary Search +3· 10 companies
379. Design Phone DirectoryVideoPremium
Solution53.3%Medium
Array, Design +3· 1 company
380. Insert Delete GetRandom O(1)Video
Solution55.3%Medium
Array, Design +3· 38 companies
384. Shuffle an ArrayVideo
Solution59.6%Medium
Array, Design +2· 8 companies
393. UTF-8 ValidationVideo
Solution46.7%Medium
Array, Bit Manipulation· 4 companies
396. Rotate FunctionVideo
Solution54.0%Medium
Array, Dynamic Programming +1· 6 companies
399. Evaluate DivisionVideo
Solution64.7%Medium
Array, Breadth-First Search +5· 23 companies
406. Queue Reconstruction by HeightVideo
Solution74.6%Medium
Array, Binary Indexed Tree +2· 5 companies
413. Arithmetic SlicesVideo
Solution65.0%Medium
Array, Dynamic Programming +1· 7 companies
416. Partition Equal Subset SumVideo
Solution49.9%Medium
Array, Dynamic Programming· 16 companies
417. Pacific Atlantic Water FlowVideo
Solution61.3%Medium
Array, Breadth-First Search +2· 11 companies
418. Sentence Screen FittingVideoPremium
Solution36.3%Medium
Array, Dynamic Programming +1· 1 company
419. Battleships in a BoardVideo
Solution77.4%Medium
Array, Depth-First Search +1· 8 companies
421. Maximum XOR of Two Numbers in an ArrayVideo
Solution53.8%Medium
Array, Bit Manipulation +2· 5 companies
427. Construct Quad TreeVideo
Solution78.8%Medium
Array, Divide and Conquer +2· 8 companies
435. Non-overlapping IntervalsVideo
Solution57.5%Medium
Array, Dynamic Programming +2· 18 companies
436. Find Right IntervalVideo
Solution56.7%Medium
Array, Binary Search +1· 4 companies
442. Find All Duplicates in an ArrayVideo
Solution76.8%Medium
Array, Hash Table· 11 companies
444. Sequence ReconstructionVideoPremium
Solution31.2%Medium
Array, Graph +1· 2 companies
447. Number of BoomerangsVideo
Solution58.0%Medium
Array, Hash Table +1· 2 companies
452. Minimum Number of Arrows to Burst BalloonsVideo
Solution61.9%Medium
Array, Greedy +1· 8 companies
453. Minimum Moves to Equal Array ElementsVideo
Solution59.2%Medium
Array, Math· 8 companies
454. 4Sum IIVideo
Solution57.9%Medium
Array, Hash Table· 4 companies
456. 132 PatternVideo
Solution35.2%Medium
Array, Binary Search +3· 8 companies
457. Circular Array LoopVideo
Solution38.3%Medium
Array, Hash Table +1· 4 companies
462. Minimum Moves to Equal Array Elements IIVideo
Solution62.2%Medium
Array, Math +1· 5 companies
469. Convex PolygonVideoPremium
Solution40.3%Medium
Array, Geometry +1· 1 company
473. Matchsticks to SquareVideo
Solution42.3%Medium
Array, Backtracking +3· 9 companies
474. Ones and ZeroesVideo
Solution53.7%Medium
Array, Dynamic Programming +1· 5 companies
475. HeatersVideo
Solution42.3%Medium
Array, Binary Search +2· 12 companies
477. Total Hamming DistanceVideo
Solution55.3%Medium
Array, Bit Manipulation +1· 3 companies
484. Find PermutationVideoPremium
Solution67.0%Medium
Array, Greedy +2· 1 company
486. Predict the WinnerVideo
Solution59.7%Medium
Array, Dynamic Programming +3· 6 companies
487. Max Consecutive Ones IIVideoPremium
Solution52.0%Medium
Array, Dynamic Programming +1· 4 companies
490. The MazeVideoPremium
Solution60.4%Medium
Array, Breadth-First Search +2· 13 companies
491. Non-decreasing SubsequencesVideo
Solution63.1%Medium
Array, Backtracking +2· 3 companies
494. Target SumVideo
Solution52.6%Medium
Array, Backtracking +1· 10 companies
497. Random Point in Non-overlapping RectanglesVideo
Solution40.8%Medium
Array, Binary Search +5· 2 companies
498. Diagonal TraverseVideo
Solution67.1%Medium
Array, Matrix +1· 12 companies
503. Next Greater Element IIVideo
Solution69.3%Medium
Array, Monotonic Stack +1· 16 companies
505. The Maze IIVideoPremium
Solution55.0%Medium
Array, Breadth-First Search +5· 5 companies
518. Coin Change IIVideo
Solution59.1%Medium
Array, Dynamic Programming· 11 companies
522. Longest Uncommon Subsequence IIVideo
Solution45.8%Medium
Array, Hash Table +3· 1 company
523. Continuous Subarray SumVideo
Solution31.3%Medium
Array, Hash Table +2· 9 companies
524. Longest Word in Dictionary through DeletingVideo
Solution53.2%Medium
Array, Sorting +2· 2 companies
525. Contiguous ArrayVideo
Solution52.2%Medium
Array, Hash Table +1· 16 companies
526. Beautiful ArrangementVideo
Solution64.9%Medium
Array, Backtracking +3· 6 companies
Showing 101–150 of 1,212