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Problems

132 problems

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

Hard · With video · 132 results

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TitleSolutionAcceptDifficultyTopics
30. Substring with Concatenation of All WordsVideo
Solution35.4%Hard
Hash Table, Sliding Window +1· 10 companies
37. Sudoku SolverVideo
Solution65.4%Hard
Array, Backtracking +2· 17 companies
41. First Missing PositiveVideo
Solution43.8%Hard
Array, Hash Table· 33 companies
76. Minimum Window SubstringVideo
Solution48.3%Hard
Hash Table, Sliding Window +1· 35 companies
126. Word Ladder IIVideo
Solution27.7%Hard
Backtracking, Breadth-First Search +2· 15 companies
127. Word LadderVideo
Solution46.3%Hard
Breadth-First Search, Hash Table +1· 41 companies
140. Word Break IIVideo
Solution56.4%Hard
Array, Backtracking +5· 16 companies
149. Max Points on a LineVideo
Solution31.6%Hard
Array, Geometry +2· 16 companies
305. Number of Islands IIVideoPremium
Solution40.5%Hard
Array, Hash Table +1· 10 companies
336. Palindrome PairsVideo
Solution37.7%Hard
Array, Hash Table +2· 8 companies
358. Rearrange String k Distance ApartVideoPremium
Solution39.9%Hard
Counting, Greedy +4· 4 companies
381. Insert Delete GetRandom O(1) - Duplicates allowedVideo
Solution37.1%Hard
Array, Design +3· 11 companies
432. All O`one Data StructureVideo
Solution44.2%Hard
Design, Doubly-Linked List +2· 13 companies
460. LFU CacheVideo
Solution50.0%Hard
Design, Doubly-Linked List +2· 32 companies
480. Sliding Window MedianVideo
Solution38.7%Hard
Array, Hash Table +2· 11 companies
548. Split Array with Equal SumVideoPremium
Solution50.1%Hard
Array, Hash Table +1· 1 company
588. Design In-Memory File SystemVideoPremium
Solution48.0%Hard
Design, Hash Table +3· 16 companies
632. Smallest Range Covering Elements from K ListsVideo
Solution70.3%Hard
Array, Greedy +4· 10 companies
710. Random Pick with BlacklistVideo
Solution35.4%Hard
Array, Binary Search +4· 3 companies
711. Number of Distinct Islands IIVideoPremium
Solution55.3%Hard
Breadth-First Search, Depth-First Search +3· 2 companies
726. Number of AtomsVideo
Solution65.1%Hard
Hash Table, Sorting +2· 8 companies
736. Parse Lisp ExpressionVideo
Solution54.1%Hard
Hash Table, Recursion +2· 4 companies
745. Prefix and Suffix SearchVideo
Solution41.2%Hard
Array, Design +3· 3 companies
770. Basic Calculator IVVideo
Solution49.8%Hard
Hash Table, Math +3· 3 companies
815. Bus RoutesVideo
Solution47.3%Hard
Array, Breadth-First Search +1· 18 companies
828. Count Unique Characters of All Substrings of a Given StringVideo
Solution54.1%Hard
Dynamic Programming, Hash Table +1· 3 companies
839. Similar String GroupsVideo
Solution56.7%Hard
Array, Breadth-First Search +4· 5 companies
895. Maximum Frequency StackVideo
Solution67.1%Hard
Design, Hash Table +2· 12 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
952. Largest Component Size by Common FactorVideo
Solution43.8%Hard
Array, Hash Table +3· 2 companies
982. Triples with Bitwise AND Equal To ZeroVideo
Solution60.7%Hard
Array, Bit Manipulation +1· 2 companies
987. Vertical Order Traversal of a Binary TreeVideo
Solution54.6%Hard
Binary Tree, Breadth-First Search +4· 15 companies
992. Subarrays with K Different IntegersVideo
Solution69.0%Hard
Array, Counting +2· 18 companies
996. Number of Squareful ArraysVideo
Solution51.9%Hard
Array, Backtracking +5· 2 companies
1001. Grid IlluminationVideo
Solution39.7%Hard
Array, Hash Table· 1 company
1036. Escape a Large MazeVideo
Solution37.0%Hard
Array, Breadth-First Search +2· 4 companies
1074. Number of Submatrices That Sum to TargetVideo
Solution74.4%Hard
Array, Hash Table +2· 4 companies
1153. String Transforms Into Another StringVideoPremium
Solution34.9%Hard
Hash Table, String· 1 company
1172. Dinner Plate StacksVideo
Solution34.2%Hard
Design, Hash Table +2· 2 companies
1178. Number of Valid Words for Each PuzzleVideo
Solution47.8%Hard
Array, Bit Manipulation +3· 1 company
1224. Maximum Equal FrequencyVideo
Solution38.8%Hard
Array, Hash Table· 1 company
1284. Minimum Number of Flips to Convert Binary Matrix to Zero MatrixVideo
Solution72.9%Hard
Array, Bit Manipulation +3· 1 company
1345. Jump Game IVVideo
Solution50.9%Hard
Array, Breadth-First Search +1· 4 companies
1542. Find Longest Awesome SubstringVideo
Solution47.4%Hard
Bit Manipulation, Hash Table +1· 1 company
1713. Minimum Operations to Make a SubsequenceVideo
Solution50.3%Hard
Array, Binary Search +2· 2 companies
1788. Maximize the Beauty of the GardenVideoPremium
Solution62.8%Hard
Array, Greedy +2· 1 company
1857. Largest Color Value in a Directed GraphVideo
Solution57.3%Hard
Counting, Dynamic Programming +4· 5 companies
1912. Design Movie Rental SystemVideo
Solution62.5%Hard
Array, Design +3· 2 companies
1932. Merge BSTs to Create Single BSTVideo
Solution40.3%Hard
Binary Search, Binary Tree +3· 3 companies
Showing 1–50 of 132