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Problems

942 problems

Has videoPremium onlyReset
Array566Dynamic Programming328String188Math182Binary Search133Hash Table132Sorting104Greedy102Bit Manipulation101Graph92Depth-First Search88Heap (Priority Queue)77Prefix Sum75Matrix74Breadth-First Search70All topics

Hard · With video · 942 results

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TitleSolutionAcceptDifficultyTopics
301. Remove Invalid ParenthesesVideo
Solution52.4%Hard
Backtracking, Breadth-First Search +1· 10 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
332. Reconstruct ItineraryVideo
Solution45.0%Hard
Depth-First Search, Eulerian Circuit +1· 23 companies
335. Self CrossingVideo
Solution36.9%Hard
Array, Geometry +1· 1 company
336. Palindrome PairsVideo
Solution37.7%Hard
Array, Hash Table +2· 8 companies
352. Data Stream as Disjoint IntervalsVideo
Solution60.8%Hard
Binary Search, Design +1· 2 companies
354. Russian Doll EnvelopesVideo
Solution37.8%Hard
Array, Binary Search +2· 13 companies
358. Rearrange String k Distance ApartVideoPremium
Solution39.9%Hard
Counting, Greedy +4· 4 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
420. Strong Password CheckerVideo
Solution16.7%Hard
Greedy, Heap (Priority Queue) +1· 7 companies
425. Word SquaresVideoPremium
Solution54.7%Hard
Array, Backtracking +2· 1 company
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
432. All O`one Data StructureVideo
Solution44.2%Hard
Design, Doubly-Linked List +2· 13 companies
440. K-th Smallest in Lexicographical OrderVideo
Solution46.2%Hard
Trie· 7 companies
446. Arithmetic Slices II - SubsequenceVideo
Solution55.1%Hard
Array, Dynamic Programming· 4 companies
458. Poor PigsVideo
Solution59.4%Hard
Combinatorics, Dynamic Programming +1· 1 company
460. LFU CacheVideo
Solution50.0%Hard
Design, Doubly-Linked List +2· 32 companies
465. Optimal Account BalancingVideoPremium
Solution50.9%Hard
Array, Backtracking +3· 12 companies
466. Count The RepetitionsVideo
Solution36.0%Hard
Dynamic Programming, String· 1 company
471. Encode String with Shortest LengthVideoPremium
Solution50.5%Hard
Dynamic Programming, String· 1 company
472. Concatenated WordsVideo
Solution49.9%Hard
Array, Depth-First Search +3· 3 companies
479. Largest Palindrome ProductVideo
Solution40.2%Hard
Enumeration, Math· 1 company
480. Sliding Window MedianVideo
Solution38.7%Hard
Array, Hash Table +2· 11 companies
483. Smallest Good BaseVideo
Solution47.6%Hard
Binary Search, Math· 3 companies
488. Zuma GameVideo
Solution29.4%Hard
Breadth-First Search, Dynamic Programming +3· 7 companies
489. Robot Room CleanerVideoPremium
Solution77.9%Hard
Backtracking, Interactive· 7 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
502. IPOVideo
Solution53.6%Hard
Array, Greedy +2· 9 companies
514. Freedom TrailVideo
Solution59.4%Hard
Breadth-First Search, Depth-First Search +2· 3 companies
517. Super Washing MachinesVideo
Solution45.3%Hard
Array, Greedy· 2 companies
527. Word AbbreviationVideoPremium
Solution62.7%Hard
Array, Greedy +3· 4 companies
546. Remove BoxesVideo
Solution49.4%Hard
Array, Dynamic Programming +1· 12 companies
548. Split Array with Equal SumVideoPremium
Solution50.1%Hard
Array, Hash Table +1· 1 company
552. Student Attendance Record IIVideo
Solution57.1%Hard
Dynamic Programming· 3 companies
Showing 51–100 of 942