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Problems

249 problems

Has videoPremium onlyReset
Array2,209String870Hash Table786Math682Dynamic Programming666Sorting504Greedy480Binary Search352Depth-First Search335Database303Bit Manipulation283Matrix278Tree261Breadth-First Search255Two Pointers249All topics

With video · 249 results

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TitleSolutionAcceptDifficultyTopics
5. Longest Palindromic SubstringVideo
Solution38.7%Medium
Dynamic Programming, String +1· 81 companies
11. Container With Most WaterVideo
Solution60.9%Medium
Array, Greedy +1· 57 companies
15. 3SumVideo
Solution40.1%Medium
Array, Sorting +1· 57 companies
16. 3Sum ClosestVideo
Solution47.4%Medium
Array, Sorting +1· 11 companies
18. 4SumVideo
Solution42.0%Medium
Array, Sorting +1· 20 companies
19. Remove Nth Node From End of ListVideo
Solution52.4%Medium
Linked List, Two Pointers· 18 companies
26. Remove Duplicates from Sorted ArrayVideo
Solution63.7%Easy
Array, Two Pointers· 26 companies
27. Remove ElementVideo
Solution62.2%Easy
Array, Two Pointers· 10 companies
28. Find the Index of the First Occurrence in a StringVideo
Solution47.0%Easy
String, String Matching +1· 16 companies
31. Next PermutationVideo
Solution46.1%Medium
Array, Two Pointers· 31 companies
42. Trapping Rain WaterVideo
Solution68.2%Hard
Array, Dynamic Programming +3· 73 companies
61. Rotate ListVideo
Solution43.1%Medium
Linked List, Two Pointers· 9 companies
75. Sort ColorsVideo
Solution69.9%Medium
Array, Sorting +1· 37 companies
80. Remove Duplicates from Sorted Array IIVideo
Solution65.0%Medium
Array, Two Pointers· 9 companies
82. Remove Duplicates from Sorted List IIVideo
Solution52.8%Medium
Linked List, Two Pointers· 11 companies
86. Partition ListVideo
Solution62.0%Medium
Linked List, Two Pointers· 5 companies
88. Merge Sorted ArrayVideo
Solution55.7%Easy
Array, Sorting +1· 37 companies
125. Valid PalindromeVideo
Solution54.2%Easy
String, Two Pointers· 39 companies
141. Linked List CycleVideo
Solution55.2%Easy
Hash Table, Linked List +1· 24 companies
142. Linked List Cycle IIVideo
Solution59.3%Medium
Hash Table, Linked List +1· 13 companies
143. Reorder ListVideo
Solution66.0%Medium
Linked List, Recursion +2· 15 companies
148. Sort ListVideo
Solution65.2%Medium
Divide and Conquer, Linked List +3· 9 companies
151. Reverse Words in a StringVideo
Solution57.8%Medium
String, Two Pointers· 30 companies
160. Intersection of Two Linked ListsVideo
Solution64.6%Easy
Hash Table, Linked List +1· 13 companies
161. One Edit DistanceVideoPremium
Solution34.4%Medium
String, Two Pointers· 8 companies
165. Compare Version NumbersVideo
Solution46.8%Medium
String, Two Pointers· 11 companies
167. Two Sum II - Input Array Is SortedVideo
Solution65.5%Medium
Array, Binary Search +1· 16 companies
170. Two Sum III - Data structure designVideoPremium
Solution39.1%Easy
Array, Data Stream +3· 2 companies
186. Reverse Words in a String IIVideoPremium
Solution56.6%Medium
String, Two Pointers· 4 companies
189. Rotate ArrayVideo
Solution45.3%Medium
Array, Math +1· 27 companies
202. Happy NumberVideo
Solution60.0%Easy
Hash Table, Math +1· 27 companies
234. Palindrome Linked ListVideo
Solution58.8%Easy
Linked List, Recursion +2· 17 companies
244. Shortest Word Distance IIVideoPremium
Solution62.8%Medium
Array, Design +3· 4 companies
246. Strobogrammatic NumberVideoPremium
Solution47.6%Easy
Hash Table, String +1· 2 companies
251. Flatten 2D VectorVideoPremium
Solution50.5%Medium
Array, Design +2· 4 companies
253. Meeting Rooms IIVideoPremium
Solution52.6%Medium
Array, Greedy +4· 42 companies
259. 3Sum SmallerVideoPremium
Solution51.4%Medium
Array, Binary Search +2· 7 companies
272. Closest Binary Search Tree Value IIVideoPremium
Solution61.1%Hard
Binary Search Tree, Binary Tree +5· 3 companies
277. Find the CelebrityVideoPremium
Solution48.9%Medium
Graph, Interactive +1· 12 companies
283. Move ZeroesVideo
Solution64.3%Easy
Array, Two Pointers· 46 companies
287. Find the Duplicate NumberVideo
Solution64.7%Medium
Array, Binary Search +2· 22 companies
295. Find Median from Data StreamVideo
Solution54.9%Hard
Data Stream, Design +3· 40 companies
321. Create Maximum NumberVideo
Solution37.3%Hard
Array, Greedy +3· 7 companies
344. Reverse StringVideo
Solution81.2%Easy
String, Two Pointers· 16 companies
345. Reverse Vowels of a StringVideo
Solution62.1%Easy
String, Two Pointers· 13 companies
349. Intersection of Two ArraysVideo
Solution78.2%Easy
Array, Binary Search +3· 16 companies
350. Intersection of Two Arrays IIVideo
Solution60.4%Easy
Array, Binary Search +3· 9 companies
360. Sort Transformed ArrayVideoPremium
Solution58.0%Medium
Array, Math +2· 3 companies
392. Is SubsequenceVideo
Solution49.5%Easy
Dynamic Programming, String +1· 16 companies
408. Valid Word AbbreviationVideoPremium
Solution37.0%Easy
String, Two Pointers· 7 companies
Showing 1–50 of 249