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18 problems

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Array70 Database51 Dynamic Programming26 String25 Math22 Depth-First Search18 Hash Table16 Graph15 Binary Search14 Breadth-First Search12 Heap (Priority Queue)12 Sorting12 Tree12 Greedy10 Matrix10 All topics

Hard · Premium · 18 results

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TitleSolutionAcceptDifficultyTopics

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

302. Smallest Rectangle Enclosing Black PixelsVideoPremium

Solution60.9%Hard

Array, Binary Search +3· 1 company

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

499. The Maze IIIVideoPremium

Solution52.3%Hard

Array, Breadth-First Search +6· 1 company

642. Design Search Autocomplete SystemVideoPremium

Solution49.9%Hard

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

711. Number of Distinct Islands IIVideoPremium

Solution55.3%Hard

Breadth-First Search, Depth-First Search +3· 2 companies

1516. Move Sub-Tree of N-Ary TreeVideoPremium

–59.7%Hard

Depth-First Search, Tree· 1 company

2204. Distance to a Cycle in Undirected GraphVideoPremium

Solution73.4%Hard

Breadth-First Search, Depth-First Search +2· 2 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

2479. Maximum XOR of Two Non-Overlapping SubtreesPremium

Solution51.3%Hard

Depth-First Search, Graph +2· 2 companies

2792. Count Nodes That Are Great EnoughVideoPremium

Solution57.1%Hard

Binary Tree, Depth-First Search +2

3313. Find the Last Marked Nodes in TreeVideoPremium

Solution57.1%Hard

Depth-First Search, Tree· 1 company

3383. Minimum Runes to Add to Cast SpellPremium

Solution45.2%Hard

Array, Breadth-First Search +4· 1 company

3385. Minimum Time to Break Locks IIPremium

Solution45.7%Hard

Array, Depth-First Search +1· 1 company

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