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Problems

88 problems

Has videoPremium onlyReset
DesignArray1,212Hash Table473String437Math331Greedy330Dynamic Programming327Sorting302Depth-First Search208Binary Search189Breadth-First Search166Matrix163Tree158Prefix Sum155Two Pointers150Database137All topics

Medium · 88 results

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TitleSolutionAcceptDifficultyTopics
1476. Subrectangle QueriesVideo
Solution86.3%Medium
Array, Design +1· 3 companies
1500. Design a File Sharing SystemVideoPremium
Solution41.7%Medium
Data Stream, Design +3· 1 company
1570. Dot Product of Two Sparse VectorsVideoPremium
Solution89.9%Medium
Array, Design +2· 12 companies
1586. Binary Search Tree Iterator IIVideoPremium
Solution63.4%Medium
Binary Search Tree, Binary Tree +4· 1 company
1600. Throne InheritanceVideo
Solution68.2%Medium
Depth-First Search, Design +2· 2 companies
1628. Design an Expression Tree With Evaluate FunctionVideoPremium
Solution82.4%Medium
Array, Binary Tree +4· 1 company
1670. Design Front Middle Back QueueVideo
Solution59.1%Medium
Array, Data Stream +3· 3 companies
1756. Design Most Recently Used QueueVideoPremium
Solution78.0%Medium
Array, Binary Indexed Tree +4· 2 companies
1797. Design Authentication ManagerVideo
Solution58.5%Medium
Design, Doubly-Linked List +2· 11 companies
1804. Implement Trie II (Prefix Tree)VideoPremium
Solution63.6%Medium
Design, Hash Table +2· 2 companies
1845. Seat Reservation ManagerVideo
Solution67.1%Medium
Design, Heap (Priority Queue)· 4 companies
1865. Finding Pairs With a Certain SumVideo
Solution61.6%Medium
Array, Design +1· 8 companies
1993. Operations on TreeVideo
Solution46.3%Medium
Array, Breadth-First Search +4· 3 companies
2013. Detect SquaresVideo
Solution53.0%Medium
Array, Counting +2· 4 companies
2034. Stock Price Fluctuation Video
Solution49.1%Medium
Data Stream, Design +3· 6 companies
2043. Simple Bank SystemVideo
Solution69.7%Medium
Array, Design +2· 20 companies
2069. Walking Robot Simulation IIVideo
Solution43.2%Medium
Design, Simulation· 2 companies
2080. Range Frequency QueriesVideo
Solution44.3%Medium
Array, Binary Search +3· 2 companies
2166. Design BitsetVideo
Solution32.7%Medium
Array, Design +2
2241. Design an ATM MachineVideo
Solution46.6%Medium
Array, Design +1· 2 companies
2336. Smallest Number in Infinite SetVideo
Solution70.6%Medium
Design, Hash Table +2· 6 companies
2349. Design a Number Container SystemVideo
Solution57.1%Medium
Design, Hash Table +2· 1 company
2353. Design a Food Rating SystemVideo
Solution52.9%Medium
Design, Hash Table +2· 4 companies
2408. Design SQLVideoPremium
Solution63.9%Medium
Array, Design +2· 2 companies
2424. Longest Uploaded PrefixVideo
Solution55.5%Medium
Binary Indexed Tree, Binary Search +5· 1 company
2502. Design Memory AllocatorVideo
Solution51.0%Medium
Array, Design +2· 18 companies
2526. Find Consecutive Integers from a Data StreamVideo
Solution51.5%Medium
Counting, Data Stream +3· 1 company
2590. Design a Todo ListVideoPremium
Solution59.8%Medium
Array, Design +3· 1 company
2671. Frequency TrackerVideo
Solution31.6%Medium
Design, Hash Table
3391. Design a 3D Binary Matrix with Efficient Layer TrackingVideoPremium
Solution66.1%Medium
Array, Design +4· 1 company
3408. Design Task ManagerVideo
Solution49.1%Medium
Design, Hash Table +2· 5 companies
3484. Design SpreadsheetVideo
Solution73.5%Medium
Array, Design +3· 7 companies
3508. Implement RouterVideo
Solution39.1%Medium
Array, Binary Search +4· 4 companies
3709. Design Exam Scores TrackerVideo
Solution44.0%Medium
Array, Binary Search +2· 1 company
3815. Design Auction SystemVideo
Solution41.9%Medium
Design, Hash Table +2· 1 company
3822. Design Order Management SystemVideoPremium
Solution79.0%Medium
Design, Hash Table· 1 company
3829. Design Ride Sharing SystemVideo
Solution62.6%Medium
Data Stream, Design +2· 1 company
3885. Design Event ManagerVideo
Solution50.3%Medium
Array, Design +3· 1 company
Showing 51–88 of 88