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Problems

2,093 problems

Has videoPremium onlyReset
Array1,196Hash Table465String434Greedy327Math327Dynamic Programming324Sorting300Depth-First Search208Binary Search187Breadth-First Search165Matrix163Tree157Prefix Sum153Two Pointers148Database135All topics

Medium · With video · 2,093 results

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TitleSolutionAcceptDifficultyTopics
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
355. Design TwitterVideo
Solution45.6%Medium
Design, Hash Table +2· 14 companies
356. Line ReflectionVideoPremium
Solution36.3%Medium
Array, Hash Table +1· 2 companies
357. Count Numbers with Unique DigitsVideo
Solution56.1%Medium
Backtracking, Dynamic Programming +1· 5 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
365. Water and Jug ProblemVideo
Solution46.4%Medium
Breadth-First Search, Depth-First Search +1· 8 companies
366. Find Leaves of Binary TreeVideoPremium
Solution81.4%Medium
Binary Tree, Depth-First Search +1· 6 companies
368. Largest Divisible SubsetVideo
Solution50.1%Medium
Array, Dynamic Programming +2· 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
371. Sum of Two IntegersVideo
Solution55.9%Medium
Bit Manipulation, Math· 8 companies
372. Super PowVideo
Solution37.3%Medium
Divide and Conquer, Math· 4 companies
373. Find K Pairs with Smallest SumsVideo
Solution42.3%Medium
Array, Heap (Priority Queue)· 10 companies
375. Guess Number Higher or Lower IIVideo
Solution53.8%Medium
Dynamic Programming, Game Theory +1· 3 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
382. Linked List Random NodeVideo
Solution65.3%Medium
Linked List, Math +2· 3 companies
384. Shuffle an ArrayVideo
Solution59.6%Medium
Array, Design +2· 8 companies
385. Mini ParserVideo
Solution44.0%Medium
Depth-First Search, Stack +1· 4 companies
386. Lexicographical NumbersVideo
Solution76.2%Medium
Depth-First Search, Trie· 6 companies
388. Longest Absolute File PathVideo
Solution49.9%Medium
Depth-First Search, Stack +1· 4 companies
390. Elimination GameVideo
Solution46.7%Medium
Math, Recursion· 6 companies
393. UTF-8 ValidationVideo
Solution46.7%Medium
Array, Bit Manipulation· 4 companies
394. Decode StringVideo
Solution63.0%Medium
Recursion, Stack +1· 40 companies
395. Longest Substring with At Least K Repeating CharactersVideo
Solution46.8%Medium
Divide and Conquer, Hash Table +2· 10 companies
396. Rotate FunctionVideo
Solution54.0%Medium
Array, Dynamic Programming +1· 6 companies
397. Integer ReplacementVideo
Solution37.9%Medium
Bit Manipulation, Dynamic Programming +2· 4 companies
398. Random Pick IndexVideo
Solution65.0%Medium
Hash Table, Math +2· 4 companies
399. Evaluate DivisionVideo
Solution64.7%Medium
Array, Breadth-First Search +5· 23 companies
400. Nth DigitVideo
Solution38.8%Medium
Binary Search, Math· 8 companies
402. Remove K DigitsVideo
Solution37.7%Medium
Greedy, Monotonic Stack +2· 21 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
423. Reconstruct Original Digits from EnglishVideo
Solution53.4%Medium
Hash Table, Math +1· 4 companies
424. Longest Repeating Character ReplacementVideo
Solution60.4%Medium
Hash Table, Sliding Window +1· 22 companies
426. Convert Binary Search Tree to Sorted Doubly Linked ListVideoPremium
Solution65.2%Medium
Binary Search Tree, Binary Tree +5· 4 companies
427. Construct Quad TreeVideo
Solution78.8%Medium
Array, Divide and Conquer +2· 8 companies
Showing 201–250 of 2,093