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106 problems

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Array578 Dynamic Programming332 String191 Math187 Binary Search136 Hash Table134 Sorting106 Greedy104 Bit Manipulation103 Graph96 Depth-First Search91 Heap (Priority Queue)78 Prefix Sum77 Matrix75 Breadth-First Search71 All topics

Hard · 106 results

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TitleSolutionAcceptDifficultyTopics

220. Contains Duplicate IIIVideo

Solution25.2%Hard

Array, Bucket Sort +3· 8 companies

295. Find Median from Data StreamVideo

Solution54.9%Hard

Data Stream, Design +3· 40 companies

296. Best Meeting PointVideoPremium

Solution61.1%Hard

Array, Math +2· 9 companies

354. Russian Doll EnvelopesVideo

Solution37.8%Hard

Array, Binary Search +2· 13 companies

358. Rearrange String k Distance ApartVideoPremium

Solution39.9%Hard

Counting, Greedy +4· 4 companies

502. IPOVideo

Solution53.6%Hard

Array, Greedy +2· 9 companies

527. Word AbbreviationVideoPremium

Solution62.7%Hard

Array, Greedy +3· 4 companies

588. Design In-Memory File SystemVideoPremium

Solution48.0%Hard

Design, Hash Table +3· 16 companies

630. Course Schedule IIIVideo

Solution42.1%Hard

Array, Greedy +2· 4 companies

632. Smallest Range Covering Elements from K ListsVideo

Solution70.3%Hard

Array, Greedy +4· 10 companies

642. Design Search Autocomplete SystemVideoPremium

Solution49.9%Hard

Data Stream, Depth-First Search +5· 12 companies

710. Random Pick with BlacklistVideo

Solution35.4%Hard

Array, Binary Search +4· 3 companies

719. Find K-th Smallest Pair DistanceVideo

Solution46.4%Hard

Array, Binary Search +2· 5 companies

726. Number of AtomsVideo

Solution65.1%Hard

Hash Table, Sorting +2· 8 companies

757. Set Intersection Size At Least TwoVideo

Solution58.0%Hard

Array, Greedy +1· 6 companies

759. Employee Free TimeVideoPremium

Solution72.9%Hard

Array, Heap (Priority Queue) +1· 12 companies

768. Max Chunks To Make Sorted IIVideo

Solution54.7%Hard

Array, Greedy +3· 5 companies

857. Minimum Cost to Hire K WorkersVideo

Solution63.5%Hard

Array, Greedy +2· 3 companies

891. Sum of Subsequence WidthsVideo

Solution41.1%Hard

899. Orderly QueueVideo

Solution67.4%Hard

Math, Sorting +1· 2 companies

987. Vertical Order Traversal of a Binary TreeVideo

Solution54.6%Hard

Binary Tree, Breadth-First Search +4· 15 companies

1187. Make Array Strictly IncreasingVideo

Solution58.0%Hard

Array, Binary Search +2

1235. Maximum Profit in Job SchedulingVideo

Solution54.8%Hard

Array, Binary Search +2· 22 companies

1340. Jump Game VVideo

Solution75.7%Hard

Array, Dynamic Programming +1· 2 companies

1383. Maximum Performance of a TeamVideo

Solution48.2%Hard

Array, Greedy +2· 7 companies

1402. Reducing DishesVideo

Solution76.8%Hard

Array, Dynamic Programming +2· 3 companies

1478. Allocate MailboxesVideo

Solution57.1%Hard

Array, Dynamic Programming +2· 4 companies

1489. Find Critical and Pseudo-Critical Edges in Minimum Spanning TreeVideo

Solution66.4%Hard

Graph, Minimum Spanning Tree +3· 4 companies

1547. Minimum Cost to Cut a StickVideo

Solution63.5%Hard

Array, Dynamic Programming +1· 8 companies

1585. Check If String Is Transformable With Substring Sort OperationsVideo

Solution51.9%Hard

Greedy, Sorting +1· 1 company

1610. Maximum Number of Visible PointsVideo

Solution38.1%Hard

Array, Geometry +3· 6 companies

1632. Rank Transform of a MatrixVideo

Solution42.7%Hard

Array, Graph +4· 3 companies

1665. Minimum Initial Energy to Finish TasksVideo

Solution76.5%Hard

Array, Greedy +1· 5 companies

1691. Maximum Height by Stacking Cuboids Video

Solution62.4%Hard

Array, Dynamic Programming +1· 4 companies

1697. Checking Existence of Edge Length Limited PathsVideo

Solution63.8%Hard

Array, Graph +3· 3 companies

1751. Maximum Number of Events That Can Be Attended IIVideo

Solution63.6%Hard

Array, Binary Search +2· 8 companies

1782. Count Pairs Of NodesVideo

Solution43.3%Hard

Array, Binary Search +3· 1 company

1840. Maximum Building HeightVideo

Solution67.1%Hard

Array, Math +1· 6 companies

1847. Closest RoomVideo

Solution41.9%Hard

Array, Binary Search +2· 1 company

1851. Minimum Interval to Include Each QueryVideo

Solution55.4%Hard

Array, Binary Search +3· 3 companies

1889. Minimum Space Wasted From PackagingVideo

Solution33.6%Hard

Array, Binary Search +2· 3 companies

1998. GCD Sort of an ArrayVideo

Solution51.3%Hard

Array, Math +3· 1 company

2071. Maximum Number of Tasks You Can AssignVideo

Solution50.1%Hard

Array, Binary Search +4· 5 companies

2092. Find All People With SecretVideo

Solution48.4%Hard

Breadth-First Search, Depth-First Search +3· 3 companies

2122. Recover the Original ArrayVideo

Solution42.0%Hard

Array, Enumeration +3· 1 company

2136. Earliest Possible Day of Full BloomVideo

Solution71.4%Hard

Array, Greedy +1· 1 company

2141. Maximum Running Time of N ComputersVideo

Solution56.4%Hard

Array, Binary Search +2· 6 companies

2234. Maximum Total Beauty of the GardensVideo

Solution30.4%Hard

Array, Binary Search +3· 1 company

2242. Maximum Score of a Node SequenceVideo

Solution40.5%Hard

Array, Enumeration +2· 1 company

2251. Number of Flowers in Full BloomVideo

Solution57.8%Hard

Array, Binary Search +4· 7 companies

Showing 1–50 of 106