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Problems

985 problems

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Array578Dynamic Programming332String191Math187Binary Search136Hash Table134Sorting106Greedy104Bit Manipulation103Graph96Depth-First Search91Heap (Priority Queue)78Prefix Sum77Matrix75Breadth-First Search71All topics

Hard · 985 results

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TitleSolutionAcceptDifficultyTopics
2122. Recover the Original ArrayVideo
Solution42.0%Hard
Array, Enumeration +3· 1 company
2123. Minimum Operations to Remove Adjacent Ones in MatrixVideoPremium
Solution42.5%Hard
Array, Graph +1· 1 company
2127. Maximum Employees to Be Invited to a MeetingVideo
Solution61.8%Hard
Depth-First Search, Graph +1· 5 companies
2132. Stamping the GridVideo
Solution36.3%Hard
Array, Greedy +2· 1 company
2136. Earliest Possible Day of Full BloomVideo
Solution71.4%Hard
Array, Greedy +1· 1 company
2141. Maximum Running Time of N ComputersVideo
Solution56.4%Hard
Array, Binary Search +2· 6 companies
2143. Choose Numbers From Two Arrays in RangePremium
Solution51.4%Hard
Array, Dynamic Programming· 1 company
2147. Number of Ways to Divide a Long CorridorVideo
Solution54.6%Hard
Dynamic Programming, Math +1· 3 companies
2151. Maximum Good People Based on StatementsVideo
Solution52.9%Hard
Array, Backtracking +2· 3 companies
2153. The Number of Passengers in Each Bus IIVideoPremium
Solution40.6%Hard
Database
2156. Find Substring With Given Hash ValueVideo
Solution27.3%Hard
Hash Function, Rolling Hash +2· 1 company
2157. Groups of StringsVideo
Solution28.2%Hard
Bit Manipulation, String +1· 1 company
2158. Amount of New Area Painted Each DayVideoPremium
Solution55.3%Hard
Array, Ordered Set +1· 2 companies
2163. Minimum Difference in Sums After Removal of ElementsVideo
Solution69.8%Hard
Array, Dynamic Programming +1· 7 companies
2167. Minimum Time to Remove All Cars Containing Illegal GoodsVideo
Solution42.2%Hard
Dynamic Programming, String· 1 company
2172. Maximum AND Sum of ArrayVideo
Solution51.4%Hard
Array, Bit Manipulation +2· 1 company
2173. Longest Winning StreakVideoPremium
Solution54.7%Hard
Database· 1 company
2179. Count Good Triplets in an ArrayVideo
Solution65.2%Hard
Array, Binary Indexed Tree +5· 3 companies
2183. Count Array Pairs Divisible by KVideo
Solution30.7%Hard
Array, Math +1· 2 companies
2188. Minimum Time to Finish the RaceVideo
Solution43.4%Hard
Array, Dynamic Programming· 1 company
2193. Minimum Number of Moves to Make PalindromeVideo
Solution52.7%Hard
Binary Indexed Tree, Greedy +2· 5 companies
2197. Replace Non-Coprime Numbers in ArrayVideo
Solution57.7%Hard
Array, Math +2· 5 companies
2199. Finding the Topic of Each PostVideoPremium
Solution50.6%Hard
Database· 1 company
2203. Minimum Weighted Subgraph With the Required PathsVideo
Solution43.8%Hard
Graph, Shortest Path· 1 company
2204. Distance to a Cycle in Undirected GraphVideoPremium
Solution73.4%Hard
Breadth-First Search, Depth-First Search +2· 2 companies
2209. Minimum White Tiles After Covering With CarpetsVideo
Solution39.3%Hard
Dynamic Programming, Prefix Sum +1· 1 company
2213. Longest Substring of One Repeating CharacterVideo
Solution65.8%Hard
Array, Ordered Set +2· 1 company
2218. Maximum Value of K Coins From PilesVideo
Solution60.5%Hard
Array, Dynamic Programming +1· 1 company
2223. Sum of Scores of Built StringsVideo
Solution51.0%Hard
Binary Search, Hash Function +4· 1 company
2227. Encrypt and Decrypt StringsVideo
Solution38.8%Hard
Array, Design +3· 3 companies
2234. Maximum Total Beauty of the GardensVideo
Solution30.4%Hard
Array, Binary Search +3· 1 company
2242. Maximum Score of a Node SequenceVideo
Solution40.5%Hard
Array, Enumeration +2· 1 company
2246. Longest Path With Different Adjacent CharactersVideo
Solution54.2%Hard
Array, Depth-First Search +4· 5 companies
2247. Maximum Cost of Trip With K HighwaysPremium
Solution50.2%Hard
Bit Manipulation, Bitmask +2
2251. Number of Flowers in Full BloomVideo
Solution57.8%Hard
Array, Binary Search +4· 7 companies
2252. Dynamic Pivoting of a TablePremium
Solution57.8%Hard
Database
2253. Dynamic Unpivoting of a TablePremium
Solution69.8%Hard
Database
2254. Design Video Sharing PlatformVideoPremium
–64.1%Hard
Design, Hash Table +2· 1 company
2258. Escape the Spreading FireVideo
Solution39.7%Hard
Array, Binary Search +2· 4 companies
2262. Total Appeal of A StringVideo
Solution56.4%Hard
Dynamic Programming, Hash Table +1· 2 companies
2263. Make Array Non-decreasing or Non-increasingVideoPremium
Solution64.7%Hard
Dynamic Programming, Greedy· 2 companies
2267. Check if There Is a Valid Parentheses String PathVideo
Solution57.2%Hard
Array, Dynamic Programming +1· 1 company
2272. Substring With Largest VarianceVideo
Solution46.1%Hard
Array, Dynamic Programming· 1 company
2276. Count Integers in IntervalsVideo
Solution36.1%Hard
Design, Ordered Set +1· 4 companies
2277. Closest Node to Path in TreeVideoPremium
–62.1%Hard
Array, Breadth-First Search +2· 1 company
2281. Sum of Total Strength of WizardsVideo
Solution29.8%Hard
Array, Monotonic Stack +2· 1 company
2286. Booking Concert Tickets in GroupsVideo
Solution20.1%Hard
Binary Indexed Tree, Binary Search +2· 1 company
2290. Minimum Obstacle Removal to Reach CornerVideo
Solution71.1%Hard
Array, Breadth-First Search +4· 2 companies
2296. Design a Text EditorVideo
Solution52.1%Hard
Design, Doubly-Linked List +4· 10 companies
2301. Match Substring After ReplacementVideo
Solution43.3%Hard
Array, Hash Table +2· 1 company
Showing 451–500 of 985