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Problems

83 problems

Has videoPremium onlyReset
Array194Database104Hash Table83String71Depth-First Search57Dynamic Programming49Tree48Math45Sorting43Breadth-First Search40Greedy40Binary Tree38Binary Search31Two Pointers29Matrix28All topics

Medium · Premium · 83 results

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TitleSolutionAcceptDifficultyTopics
159. Longest Substring with At Most Two Distinct CharactersVideoPremium
Solution57.0%Medium
Hash Table, Sliding Window +1· 5 companies
244. Shortest Word Distance IIVideoPremium
Solution62.8%Medium
Array, Design +3· 4 companies
249. Group Shifted StringsVideoPremium
Solution67.8%Medium
Array, Hash Table +1· 4 companies
267. Palindrome Permutation IIVideoPremium
Solution41.9%Medium
Backtracking, Hash Table +1
288. Unique Word AbbreviationVideoPremium
Solution28.1%Medium
Array, Design +2· 1 company
291. Word Pattern IIVideoPremium
Solution49.1%Medium
Backtracking, Hash Table +1· 6 companies
311. Sparse Matrix MultiplicationVideoPremium
Solution69.3%Medium
Array, Hash Table +1· 9 companies
314. Binary Tree Vertical Order TraversalVideoPremium
Solution57.8%Medium
Binary Tree, Breadth-First Search +4· 9 companies
325. Maximum Size Subarray Sum Equals kVideoPremium
Solution50.8%Medium
Array, Hash Table +1· 8 companies
340. Longest Substring with At Most K Distinct CharactersVideoPremium
Solution49.9%Medium
Hash Table, Sliding Window +1· 12 companies
348. Design Tic-Tac-ToeVideoPremium
Solution58.8%Medium
Array, Design +3· 13 companies
353. Design Snake GameVideoPremium
Solution40.0%Medium
Array, Design +3· 10 companies
356. Line ReflectionVideoPremium
Solution36.3%Medium
Array, Hash Table +1· 2 companies
379. Design Phone DirectoryVideoPremium
Solution53.3%Medium
Array, Design +3· 1 company
531. Lonely Pixel IVideoPremium
Solution62.3%Medium
Array, Hash Table +1· 1 company
533. Lonely Pixel IIVideoPremium
Solution48.7%Medium
Array, Hash Table +1· 1 company
582. Kill ProcessVideoPremium
Solution70.4%Medium
Array, Breadth-First Search +3· 4 companies
616. Add Bold Tag in StringVideoPremium
Solution51.4%Medium
Array, Hash Table +3· 4 companies
635. Design Log Storage SystemVideoPremium
Solution59.8%Medium
Design, Hash Table +2· 4 companies
666. Path Sum IVVideoPremium
Solution62.5%Medium
Array, Binary Tree +3· 1 company
681. Next Closest TimeVideoPremium
Solution46.8%Medium
Backtracking, Enumeration +2· 1 company
694. Number of Distinct IslandsVideoPremium
Solution62.8%Medium
Breadth-First Search, Depth-First Search +3· 12 companies
737. Sentence Similarity IIVideoPremium
Solution51.2%Medium
Array, Breadth-First Search +4· 4 companies
758. Bold Words in StringVideoPremium
Solution53.2%Medium
Array, Hash Table +3· 1 company
1100. Find K-Length Substrings With No Repeated CharactersVideoPremium
Solution76.5%Medium
Hash Table, Sliding Window +1· 1 company
1152. Analyze User Website Visit PatternVideoPremium
Solution44.3%Medium
Array, Hash Table +1· 5 companies
1166. Design File SystemVideoPremium
Solution65.1%Medium
Design, Hash Table +2· 12 companies
1181. Before and After PuzzleVideoPremium
Solution51.8%Medium
Array, Hash Table +2· 1 company
1198. Find Smallest Common Element in All RowsVideoPremium
Solution76.5%Medium
Array, Binary Search +3· 2 companies
1244. Design A LeaderboardVideoPremium
Solution67.9%Medium
Design, Hash Table +1· 9 companies
1257. Smallest Common RegionVideoPremium
Solution68.6%Medium
Array, Breadth-First Search +4· 1 company
1258. Synonymous SentencesVideoPremium
Solution57.2%Medium
Array, Backtracking +3· 3 companies
1429. First Unique NumberVideoPremium
Solution57.8%Medium
Array, Data Stream +3· 5 companies
1485. Clone Binary Tree With Random PointerVideoPremium
Solution81.2%Medium
Binary Tree, Breadth-First Search +3· 2 companies
1490. Clone N-ary TreeVideoPremium
Solution83.2%Medium
Breadth-First Search, Depth-First Search +2· 1 company
1500. Design a File Sharing SystemVideoPremium
Solution41.7%Medium
Data Stream, Design +3· 1 company
1506. Find Root of N-Ary TreeVideoPremium
Solution78.4%Medium
Bit Manipulation, Depth-First Search +2· 3 companies
1554. Strings Differ by One CharacterVideoPremium
Solution39.4%Medium
Hash Function, Hash Table +2· 1 company
1570. Dot Product of Two Sparse VectorsVideoPremium
Solution89.9%Medium
Array, Design +2· 12 companies
1612. Check If Two Expression Trees are EquivalentVideoPremium
Solution71.8%Medium
Binary Tree, Counting +3· 1 company
1650. Lowest Common Ancestor of a Binary Tree IIIVideoPremium
Solution83.0%Medium
Binary Tree, Hash Table +2· 10 companies
1660. Correct a Binary TreeVideoPremium
Solution74.3%Medium
Binary Tree, Breadth-First Search +3· 1 company
1676. Lowest Common Ancestor of a Binary Tree IVVideoPremium
Solution79.6%Medium
Binary Tree, Depth-First Search +2· 4 companies
1740. Find Distance in a Binary TreeVideoPremium
Solution74.3%Medium
Binary Tree, Breadth-First Search +3· 2 companies
1756. Design Most Recently Used QueueVideoPremium
Solution78.0%Medium
Array, Binary Indexed Tree +4· 2 companies
1772. Sort Features by PopularityVideoPremium
Solution66.4%Medium
Array, Hash Table +2· 1 company
1794. Count Pairs of Equal Substrings With Minimum DifferenceVideoPremium
Solution62.7%Medium
Greedy, Hash Table +1· 1 company
1804. Implement Trie II (Prefix Tree)VideoPremium
Solution63.6%Medium
Design, Hash Table +2· 2 companies
1836. Remove Duplicates From an Unsorted Linked ListVideoPremium
Solution75.6%Medium
Hash Table, Linked List· 2 companies
1852. Distinct Numbers in Each SubarrayVideoPremium
Solution77.3%Medium
Array, Hash Table +1· 1 company
Showing 1–50 of 83