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Problems

150 problems

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

Medium · 150 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
31. Next PermutationVideo
Solution46.1%Medium
Array, Two Pointers· 31 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
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
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
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
244. Shortest Word Distance IIVideoPremium
Solution62.8%Medium
Array, Design +3· 4 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
277. Find the CelebrityVideoPremium
Solution48.9%Medium
Graph, Interactive +1· 12 companies
287. Find the Duplicate NumberVideo
Solution64.7%Medium
Array, Binary Search +2· 22 companies
360. Sort Transformed ArrayVideoPremium
Solution58.0%Medium
Array, Math +2· 3 companies
443. String CompressionVideo
Solution60.9%Medium
String, Two Pointers· 41 companies
457. Circular Array LoopVideo
Solution38.3%Medium
Array, Hash Table +1· 4 companies
475. HeatersVideo
Solution42.3%Medium
Array, Binary Search +2· 12 companies
481. Magical StringVideo
Solution56.6%Medium
String, Two Pointers· 3 companies
522. Longest Uncommon Subsequence IIVideo
Solution45.8%Medium
Array, Hash Table +3· 1 company
524. Longest Word in Dictionary through DeletingVideo
Solution53.2%Medium
Array, Sorting +2· 2 companies
532. K-diff Pairs in an ArrayVideo
Solution46.3%Medium
Array, Binary Search +3· 8 companies
556. Next Greater Element IIIVideo
Solution35.2%Medium
Math, String +1· 11 companies
567. Permutation in StringVideo
Solution49.8%Medium
Hash Table, Sliding Window +2· 16 companies
581. Shortest Unsorted Continuous SubarrayVideo
Solution38.7%Medium
Array, Greedy +4· 9 companies
611. Valid Triangle NumberVideo
Solution56.8%Medium
Array, Binary Search +3· 9 companies
633. Sum of Square NumbersVideo
Solution37.0%Medium
Binary Search, Math +1· 6 companies
647. Palindromic SubstringsVideo
Solution73.2%Medium
Dynamic Programming, String +1· 25 companies
658. Find K Closest ElementsVideo
Solution50.1%Medium
Array, Binary Search +4· 18 companies
723. Candy CrushVideoPremium
Solution77.6%Medium
Array, Matrix +2· 11 companies
763. Partition LabelsVideo
Solution81.8%Medium
Greedy, Hash Table +2· 9 companies
777. Swap Adjacent in LR StringVideo
Solution38.5%Medium
String, Two Pointers· 3 companies
786. K-th Smallest Prime FractionVideo
Solution69.0%Medium
Array, Binary Search +3· 1 company
795. Number of Subarrays with Bounded MaximumVideo
Solution55.4%Medium
Array, Two Pointers· 4 companies
809. Expressive WordsVideo
Solution46.8%Medium
Array, String +1· 2 companies
825. Friends Of Appropriate AgesVideo
Solution49.9%Medium
Array, Binary Search +2· 3 companies
826. Most Profit Assigning WorkVideo
Solution56.4%Medium
Array, Binary Search +3· 5 companies
Showing 1–50 of 150