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Array566 Dynamic Programming328 String188 Math182 Binary Search133 Hash Table132 Sorting104 Greedy102 Bit Manipulation101 Graph92 Depth-First Search88 Heap (Priority Queue)77 Prefix Sum75 Matrix74 Breadth-First Search70 All topics

Hard · With video · 566 results

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TitleSolutionAcceptDifficultyTopics

4. Median of Two Sorted ArraysVideo

Solution47.9%Hard

Array, Binary Search +1· 45 companies

37. Sudoku SolverVideo

Solution65.4%Hard

Array, Backtracking +2· 17 companies

41. First Missing PositiveVideo

Solution43.8%Hard

Array, Hash Table· 33 companies

42. Trapping Rain WaterVideo

Solution68.2%Hard

Array, Dynamic Programming +3· 73 companies

51. N-QueensVideo

Solution76.3%Hard

Array, Backtracking· 16 companies

68. Text JustificationVideo

Solution52.4%Hard

Array, Simulation +1· 44 companies

84. Largest Rectangle in HistogramVideo

Solution50.7%Hard

Array, Monotonic Stack +1· 30 companies

85. Maximal RectangleVideo

Solution60.1%Hard

Array, Dynamic Programming +3· 15 companies

123. Best Time to Buy and Sell Stock IIIVideo

Solution54.5%Hard

Array, Dynamic Programming· 13 companies

135. CandyVideo

Solution49.3%Hard

Array, Greedy· 24 companies

140. Word Break IIVideo

Solution56.4%Hard

Array, Backtracking +5· 16 companies

149. Max Points on a LineVideo

Solution31.6%Hard

Array, Geometry +2· 16 companies

154. Find Minimum in Rotated Sorted Array IIVideo

Solution47.2%Hard

Array, Binary Search· 5 companies

158. Read N Characters Given read4 II - Call Multiple TimesVideoPremium

Solution43.2%Hard

Array, Interactive +1· 5 companies

174. Dungeon GameVideo

Solution42.2%Hard

Array, Dynamic Programming +1· 8 companies

188. Best Time to Buy and Sell Stock IVVideo

Solution51.5%Hard

Array, Dynamic Programming· 11 companies

212. Word Search IIVideo

Solution38.8%Hard

Array, Backtracking +3· 21 companies

218. The Skyline ProblemVideo

Solution45.7%Hard

Array, Binary Indexed Tree +5· 13 companies

220. Contains Duplicate IIIVideo

Solution25.2%Hard

Array, Bucket Sort +3· 8 companies

239. Sliding Window MaximumVideo

Solution49.1%Hard

Array, Heap (Priority Queue) +3· 48 companies

248. Strobogrammatic Number IIIVideoPremium

Solution42.3%Hard

Array, Recursion +1

265. Paint House IIVideoPremium

Solution57.0%Hard

Array, Dynamic Programming· 2 companies

269. Alien DictionaryVideoPremium

Solution37.1%Hard

Array, Breadth-First Search +4· 18 companies

296. Best Meeting PointVideoPremium

Solution61.1%Hard

Array, Math +2· 9 companies

302. Smallest Rectangle Enclosing Black PixelsVideoPremium

Solution60.9%Hard

Array, Binary Search +3· 1 company

305. Number of Islands IIVideoPremium

Solution40.5%Hard

Array, Hash Table +1· 10 companies

312. Burst BalloonsVideo

Solution64.3%Hard

Array, Dynamic Programming· 15 companies

315. Count of Smaller Numbers After SelfVideo

Solution44.0%Hard

Array, Binary Indexed Tree +5· 6 companies

317. Shortest Distance from All BuildingsVideoPremium

Solution44.9%Hard

Array, Breadth-First Search +1· 15 companies

321. Create Maximum NumberVideo

Solution37.3%Hard

Array, Greedy +3· 7 companies

327. Count of Range SumVideo

Solution40.3%Hard

Array, Binary Indexed Tree +5· 5 companies

329. Longest Increasing Path in a MatrixVideo

Solution57.0%Hard

Array, Breadth-First Search +6· 16 companies

330. Patching ArrayVideo

Solution54.7%Hard

Array, Greedy· 4 companies

335. Self CrossingVideo

Solution36.9%Hard

Array, Geometry +1· 1 company

336. Palindrome PairsVideo

Solution37.7%Hard

Array, Hash Table +2· 8 companies

354. Russian Doll EnvelopesVideo

Solution37.8%Hard

Array, Binary Search +2· 13 companies

363. Max Sum of Rectangle No Larger Than KVideo

Solution46.0%Hard

Array, Binary Search +3· 3 companies

381. Insert Delete GetRandom O(1) - Duplicates allowedVideo

Solution37.1%Hard

Array, Design +3· 11 companies

391. Perfect RectangleVideo

Solution39.4%Hard

Array, Line Sweep· 3 companies

403. Frog JumpVideo

Solution47.8%Hard

Array, Dynamic Programming· 11 companies

407. Trapping Rain Water IIVideo

Solution64.0%Hard

Array, Breadth-First Search +2· 14 companies

410. Split Array Largest SumVideo

Solution61.2%Hard

Array, Binary Search +3· 20 companies

411. Minimum Unique Word AbbreviationVideoPremium

–40.5%Hard

Array, Backtracking +2· 2 companies

425. Word SquaresVideoPremium

Solution54.7%Hard

Array, Backtracking +2· 1 company

446. Arithmetic Slices II - SubsequenceVideo

Solution55.1%Hard

Array, Dynamic Programming· 4 companies

465. Optimal Account BalancingVideoPremium

Solution50.9%Hard

Array, Backtracking +3· 12 companies

472. Concatenated WordsVideo

Solution49.9%Hard

Array, Depth-First Search +3· 3 companies

480. Sliding Window MedianVideo

Solution38.7%Hard

Array, Hash Table +2· 11 companies

493. Reverse PairsVideo

Solution35.1%Hard

Array, Binary Indexed Tree +5· 9 companies

499. The Maze IIIVideoPremium

Solution52.3%Hard

Array, Breadth-First Search +6· 1 company

Showing 1–50 of 566