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Problems

302 problems

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

Medium · 302 results

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TitleSolutionAcceptDifficultyTopics
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
49. Group AnagramsVideo
Solution73.0%Medium
Array, Hash Table +2· 87 companies
56. Merge IntervalsVideo
Solution52.6%Medium
Array, Sorting· 112 companies
75. Sort ColorsVideo
Solution69.9%Medium
Array, Sorting +1· 37 companies
147. Insertion Sort ListVideo
Solution60.5%Medium
Linked List, Sorting· 5 companies
148. Sort ListVideo
Solution65.2%Medium
Divide and Conquer, Linked List +3· 9 companies
164. Maximum GapVideo
Solution53.4%Medium
Array, Bucket Sort +2· 7 companies
179. Largest NumberVideo
Solution43.9%Medium
Array, Greedy +2· 23 companies
215. Kth Largest Element in an ArrayVideo
Solution69.4%Medium
Array, Divide and Conquer +3· 41 companies
229. Majority Element IIVideo
Solution56.5%Medium
Array, Counting +2· 9 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
274. H-IndexVideo
Solution41.8%Medium
Array, Counting Sort +1· 8 companies
280. Wiggle SortVideoPremium
Solution68.5%Medium
Array, Greedy +1· 4 companies
314. Binary Tree Vertical Order TraversalVideoPremium
Solution57.8%Medium
Binary Tree, Breadth-First Search +4· 9 companies
324. Wiggle Sort IIVideo
Solution38.4%Medium
Array, Divide and Conquer +3· 4 companies
347. Top K Frequent ElementsVideo
Solution67.3%Medium
Array, Bucket Sort +6· 53 companies
360. Sort Transformed ArrayVideoPremium
Solution58.0%Medium
Array, Math +2· 3 companies
368. Largest Divisible SubsetVideo
Solution50.1%Medium
Array, Dynamic Programming +2· 6 companies
378. Kth Smallest Element in a Sorted MatrixVideo
Solution65.1%Medium
Array, Binary Search +3· 10 companies
406. Queue Reconstruction by HeightVideo
Solution74.6%Medium
Array, Binary Indexed Tree +2· 5 companies
435. Non-overlapping IntervalsVideo
Solution57.5%Medium
Array, Dynamic Programming +2· 18 companies
436. Find Right IntervalVideo
Solution56.7%Medium
Array, Binary Search +1· 4 companies
451. Sort Characters By FrequencyVideo
Solution75.8%Medium
Bucket Sort, Counting +4· 16 companies
452. Minimum Number of Arrows to Burst BalloonsVideo
Solution61.9%Medium
Array, Greedy +1· 8 companies
462. Minimum Moves to Equal Array Elements IIVideo
Solution62.2%Medium
Array, Math +1· 5 companies
475. HeatersVideo
Solution42.3%Medium
Array, Binary Search +2· 12 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
539. Minimum Time DifferenceVideo
Solution62.7%Medium
Array, Math +2· 9 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
621. Task SchedulerVideo
Solution64.0%Medium
Array, Counting +4· 24 companies
646. Maximum Length of Pair ChainVideo
Solution62.2%Medium
Array, Dynamic Programming +2· 2 companies
658. Find K Closest ElementsVideo
Solution50.1%Medium
Array, Binary Search +4· 18 companies
692. Top K Frequent WordsVideo
Solution60.6%Medium
Bucket Sort, Counting +5· 23 companies
720. Longest Word in DictionaryVideo
Solution55.2%Medium
Array, Hash Table +3· 3 companies
721. Accounts MergeVideo
Solution62.2%Medium
Array, Breadth-First Search +5· 17 companies
767. Reorganize StringVideo
Solution57.5%Medium
Counting, Greedy +4· 20 companies
769. Max Chunks To Make SortedVideo
Solution64.1%Medium
Array, Greedy +3· 7 companies
786. K-th Smallest Prime FractionVideo
Solution69.0%Medium
Array, Binary Search +3· 1 company
791. Custom Sort StringVideo
Solution72.3%Medium
Hash Table, Sorting +1· 5 companies
792. Number of Matching SubsequencesVideo
Solution50.8%Medium
Array, Binary Search +5· 9 companies
823. Binary Trees With FactorsVideo
Solution52.9%Medium
Array, Dynamic Programming +2· 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
833. Find And Replace in StringVideo
Solution50.9%Medium
Array, Hash Table +2· 2 companies
Showing 1–50 of 302