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Problems

331 problems

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

Medium · 331 results

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TitleSolutionAcceptDifficultyTopics
2. Add Two NumbersVideo
Solution49.3%Medium
Linked List, Math +1· 37 companies
7. Reverse IntegerVideo
Solution32.2%Medium
Math· 22 companies
12. Integer to RomanVideo
Solution71.8%Medium
Hash Table, Math +1· 31 companies
29. Divide Two IntegersVideo
Solution20.1%Medium
Bit Manipulation, Math· 8 companies
43. Multiply StringsVideo
Solution44.4%Medium
Math, Simulation +1· 17 companies
48. Rotate ImageVideo
Solution80.7%Medium
Array, Math +1· 36 companies
50. Pow(x, n)Video
Solution39.0%Medium
Math, Recursion· 22 companies
62. Unique PathsVideo
Solution67.3%Medium
Combinatorics, Dynamic Programming +1· 21 companies
89. Gray CodeVideo
Solution66.2%Medium
Backtracking, Bit Manipulation +1· 5 companies
96. Unique Binary Search TreesVideo
Solution64.0%Medium
Binary Search Tree, Binary Tree +3· 10 companies
150. Evaluate Reverse Polish NotationVideo
Solution58.5%Medium
Array, Math +1· 18 companies
166. Fraction to Recurring DecimalVideo
Solution31.3%Medium
Hash Table, Math +1· 10 companies
172. Factorial Trailing ZeroesVideo
Solution47.5%Medium
Math· 5 companies
189. Rotate ArrayVideo
Solution45.3%Medium
Array, Math +1· 27 companies
204. Count PrimesVideo
Solution35.8%Medium
Array, Enumeration +2· 17 companies
223. Rectangle AreaVideo
Solution50.3%Medium
Geometry, Math· 7 companies
227. Basic Calculator IIVideo
Solution47.3%Medium
Math, Stack +1· 32 companies
241. Different Ways to Add ParenthesesVideo
Solution73.7%Medium
Dynamic Programming, Math +3· 6 companies
264. Ugly Number IIVideo
Solution49.7%Medium
Dynamic Programming, Hash Table +2· 9 companies
279. Perfect SquaresVideo
Solution57.0%Medium
Breadth-First Search, Dynamic Programming +1· 12 companies
294. Flip Game IIVideoPremium
Solution52.2%Medium
Backtracking, Dynamic Programming +3· 2 companies
313. Super Ugly NumberVideo
Solution46.6%Medium
Array, Dynamic Programming +1· 5 companies
319. Bulb SwitcherVideo
Solution56.2%Medium
Brainteaser, Math· 9 companies
343. Integer BreakVideo
Solution62.6%Medium
Dynamic Programming, Math· 6 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
365. Water and Jug ProblemVideo
Solution46.4%Medium
Breadth-First Search, Depth-First Search +1· 8 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
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
375. Guess Number Higher or Lower IIVideo
Solution53.8%Medium
Dynamic Programming, Game Theory +1· 3 companies
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
390. Elimination GameVideo
Solution46.7%Medium
Math, Recursion· 6 companies
396. Rotate FunctionVideo
Solution54.0%Medium
Array, Dynamic Programming +1· 6 companies
398. Random Pick IndexVideo
Solution65.0%Medium
Hash Table, Math +2· 4 companies
400. Nth DigitVideo
Solution38.8%Medium
Binary Search, Math· 8 companies
423. Reconstruct Original Digits from EnglishVideo
Solution53.4%Medium
Hash Table, Math +1· 4 companies
445. Add Two Numbers IIVideo
Solution63.1%Medium
Linked List, Math +1· 9 companies
447. Number of BoomerangsVideo
Solution58.0%Medium
Array, Hash Table +1· 2 companies
453. Minimum Moves to Equal Array ElementsVideo
Solution59.2%Medium
Array, Math· 8 companies
462. Minimum Moves to Equal Array Elements IIVideo
Solution62.2%Medium
Array, Math +1· 5 companies
464. Can I WinVideo
Solution31.7%Medium
Bit Manipulation, Bitmask +4· 4 companies
469. Convex PolygonVideoPremium
Solution40.3%Medium
Array, Geometry +1· 1 company
470. Implement Rand10() Using Rand7()Video
Solution47.0%Medium
Math, Probability and Statistics +2· 6 companies
477. Total Hamming DistanceVideo
Solution55.3%Medium
Array, Bit Manipulation +1· 3 companies
478. Generate Random Point in a CircleVideo
Solution43.8%Medium
Geometry, Math +2· 2 companies
Showing 1–50 of 331