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Problems

88 problems

Has videoPremium onlyReset
Array566Dynamic Programming328String188Math182Binary Search133Hash Table132Sorting104Greedy102Bit Manipulation101Graph92Depth-First Search88Heap (Priority Queue)77Prefix Sum75Matrix74Breadth-First Search70All topics

Hard · With video · 88 results

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TitleSolutionAcceptDifficultyTopics
124. Binary Tree Maximum Path SumVideo
Solution42.7%Hard
Binary Tree, Depth-First Search +2· 25 companies
269. Alien DictionaryVideoPremium
Solution37.1%Hard
Array, Breadth-First Search +4· 18 companies
272. Closest Binary Search Tree Value IIVideoPremium
Solution61.1%Hard
Binary Search Tree, Binary Tree +5· 3 companies
297. Serialize and Deserialize Binary TreeVideo
Solution61.1%Hard
Binary Tree, Breadth-First Search +4· 23 companies
302. Smallest Rectangle Enclosing Black PixelsVideoPremium
Solution60.9%Hard
Array, Binary Search +3· 1 company
329. Longest Increasing Path in a MatrixVideo
Solution57.0%Hard
Array, Breadth-First Search +6· 16 companies
332. Reconstruct ItineraryVideo
Solution45.0%Hard
Depth-First Search, Eulerian Circuit +1· 23 companies
428. Serialize and Deserialize N-ary TreeVideoPremium
Solution68.7%Hard
Breadth-First Search, Depth-First Search +2· 7 companies
431. Encode N-ary Tree to Binary TreeVideoPremium
Solution80.6%Hard
Binary Tree, Breadth-First Search +3
472. Concatenated WordsVideo
Solution49.9%Hard
Array, Depth-First Search +3· 3 companies
499. The Maze IIIVideoPremium
Solution52.3%Hard
Array, Breadth-First Search +6· 1 company
514. Freedom TrailVideo
Solution59.4%Hard
Breadth-First Search, Depth-First Search +2· 3 companies
642. Design Search Autocomplete SystemVideoPremium
Solution49.9%Hard
Data Stream, Depth-First Search +5· 12 companies
685. Redundant Connection IIVideo
Solution36.6%Hard
Breadth-First Search, Depth-First Search +2· 1 company
711. Number of Distinct Islands IIVideoPremium
Solution55.3%Hard
Breadth-First Search, Depth-First Search +3· 2 companies
749. Contain VirusVideo
Solution56.5%Hard
Array, Breadth-First Search +3· 3 companies
753. Cracking the SafeVideo
Solution58.5%Hard
Depth-First Search, Eulerian Circuit +1· 1 company
765. Couples Holding HandsVideo
Solution59.8%Hard
Breadth-First Search, Depth-First Search +3· 5 companies
778. Swim in Rising WaterVideo
Solution68.3%Hard
Array, Binary Search +5· 8 companies
827. Making A Large IslandVideo
Solution57.0%Hard
Array, Breadth-First Search +3· 16 companies
834. Sum of Distances in TreeVideo
Solution65.8%Hard
Depth-First Search, Dynamic Programming +2· 5 companies
839. Similar String GroupsVideo
Solution56.7%Hard
Array, Breadth-First Search +4· 5 companies
924. Minimize Malware SpreadVideo
Solution43.6%Hard
Array, Breadth-First Search +4· 10 companies
928. Minimize Malware Spread IIVideo
Solution46.2%Hard
Array, Breadth-First Search +4· 2 companies
968. Binary Tree CamerasVideo
Solution48.3%Hard
Binary Tree, Depth-First Search +2· 14 companies
987. Vertical Order Traversal of a Binary TreeVideo
Solution54.6%Hard
Binary Tree, Breadth-First Search +4· 15 companies
1028. Recover a Tree From Preorder TraversalVideo
Solution83.2%Hard
Binary Tree, Depth-First Search +2· 6 companies
1036. Escape a Large MazeVideo
Solution37.0%Hard
Array, Breadth-First Search +2· 4 companies
1192. Critical Connections in a NetworkVideo
Solution60.6%Hard
Biconnected Component, Depth-First Search +1· 8 companies
1203. Sort Items by Groups Respecting DependenciesVideo
Solution66.0%Hard
Breadth-First Search, Depth-First Search +2· 5 companies
1373. Maximum Sum BST in Binary TreeVideo
Solution48.9%Hard
Binary Search Tree, Binary Tree +3· 5 companies
1377. Frog Position After T SecondsVideo
Solution38.8%Hard
Breadth-First Search, Depth-First Search +2· 2 companies
1483. Kth Ancestor of a Tree NodeVideo
Solution39.7%Hard
Binary Search, Breadth-First Search +4· 3 companies
1516. Move Sub-Tree of N-Ary TreeVideoPremium
–59.7%Hard
Depth-First Search, Tree· 1 company
1568. Minimum Number of Days to Disconnect IslandVideo
Solution58.8%Hard
Array, Breadth-First Search +3· 4 companies
1766. Tree of CoprimesVideo
Solution45.1%Hard
Array, Depth-First Search +3· 1 company
1932. Merge BSTs to Create Single BSTVideo
Solution40.3%Hard
Binary Search, Binary Tree +3· 3 companies
1938. Maximum Genetic Difference QueryVideo
Solution48.6%Hard
Array, Bit Manipulation +3· 1 company
1970. Last Day Where You Can Still CrossVideo
Solution68.7%Hard
Array, Binary Search +4· 4 companies
2003. Smallest Missing Genetic Value in Each SubtreeVideo
Solution48.4%Hard
Depth-First Search, Dynamic Programming +2
2092. Find All People With SecretVideo
Solution48.4%Hard
Breadth-First Search, Depth-First Search +3· 3 companies
2097. Valid Arrangement of PairsVideo
–66.5%Hard
Depth-First Search, Eulerian Circuit +1· 3 companies
2127. Maximum Employees to Be Invited to a MeetingVideo
Solution61.8%Hard
Depth-First Search, Graph +1· 5 companies
2204. Distance to a Cycle in Undirected GraphVideoPremium
Solution73.4%Hard
Breadth-First Search, Depth-First Search +2· 2 companies
2246. Longest Path With Different Adjacent CharactersVideo
Solution54.2%Hard
Array, Depth-First Search +4· 5 companies
2277. Closest Node to Path in TreeVideoPremium
–62.1%Hard
Array, Breadth-First Search +2· 1 company
2307. Check for Contradictions in EquationsVideoPremium
Solution43.8%Hard
Array, Depth-First Search +2· 2 companies
2313. Minimum Flips in Binary Tree to Get ResultVideoPremium
Solution56.9%Hard
Binary Tree, Depth-First Search +2· 1 company
2322. Minimum Score After Removals on a TreeVideo
Solution76.2%Hard
Array, Bit Manipulation +2· 4 companies
2328. Number of Increasing Paths in a GridVideo
Solution57.4%Hard
Array, Breadth-First Search +6· 2 companies
Showing 1–50 of 88