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3181. Maximum Total Reward Using Operations IIHard
LeetCodeArrayDynamic ProgrammingBit ManipulationSorting
3187. Peaks in ArrayHard
LeetCodeArrayBinary Indexed TreeSegment Tree
3188. Find Top Scoring Students IIHard
LeetCodeDatabase
3193. Count the Number of InversionsHard
LeetCodeArrayDynamic Programming
3197. Find the Minimum Area to Cover All Ones IIHard
LeetCodeArrayMatrixEnumeration
32. Longest Valid ParenthesesHard
LeetCodeStringDynamic ProgrammingStack
3203. Find Minimum Diameter After Merging Two TreesHard
LeetCodeTreeDepth-First SearchBreadth-First SearchGraph Theory
3209. Number of Subarrays With AND Value of KHard
LeetCodeArrayBinary SearchBit ManipulationSegment Tree
321. Create Maximum NumberHard
LeetCodeArrayTwo PointersStackGreedy
3213. Construct String with Minimum CostHard
LeetCodeArrayStringDynamic ProgrammingSuffix Array
3214. Year on Year Growth RateHard
LeetCodeDatabase
3219. Minimum Cost for Cutting Cake IIHard
LeetCodeArrayGreedySorting
3225. Maximum Score From Grid OperationsHard
LeetCodeArrayDynamic ProgrammingMatrixPrefix Sum
3229. Minimum Operations to Make Array Equal to TargetHard
LeetCodeArrayDynamic ProgrammingStackGreedy
3231. Minimum Number of Increasing Subsequence to Be RemovedHard
LeetCodeArrayBinary Search
3235. Check if the Rectangle Corner Is ReachableHard
LeetCodeArrayMathDepth-First SearchBreadth-First Search
3236. CEO Subordinate HierarchyHard
LeetCodeDatabase
3241. Time Taken to Mark All NodesHard
LeetCodeDynamic ProgrammingTreeDepth-First SearchGraph Theory
3244. Shortest Distance After Road Addition Queries IIHard
LeetCodeArrayGreedyGraph TheoryOrdered Set
3245. Alternating Groups IIIHard
LeetCodeArrayBinary Indexed TreeOrdered Set
3250. Find the Count of Monotonic Pairs IHard
LeetCodeArrayMathDynamic ProgrammingCombinatorics
3251. Find the Count of Monotonic Pairs IIHard
LeetCodeArrayMathDynamic ProgrammingCombinatorics
3256. Maximum Value Sum by Placing Three Rooks IHard
LeetCodeArrayDynamic ProgrammingMatrixEnumeration
3257. Maximum Value Sum by Placing Three Rooks IIHard
LeetCodeArrayDynamic ProgrammingMatrixEnumeration
3260. Find the Largest Palindrome Divisible by KHard
LeetCodeMathStringDynamic ProgrammingGreedy
3261. Count Substrings That Satisfy K-Constraint IIHard
LeetCodeArrayStringBinary SearchSliding Window
3266. Final Array State After K Multiplication Operations IIHard
LeetCodeArrayHeap (Priority Queue)Simulation
3267. Count Almost Equal Pairs IIHard
LeetCodeArrayHash TableSortingCounting
3268. Find Overlapping Shifts IIHard
LeetCodeDatabase
3269. Constructing Two Increasing ArraysHard
LeetCodeArrayDynamic Programming
327. Count of Range SumHard
LeetCodeArrayBinary SearchDivide and ConquerBinary Indexed Tree
3272. Find the Count of Good IntegersHard
LeetCodeHash TableMathCombinatoricsEnumeration
3273. Minimum Amount of Damage Dealt to BobHard
LeetCodeArrayGreedySorting
3276. Select Cells in Grid With Maximum ScoreHard
LeetCodeArrayDynamic ProgrammingBit ManipulationMatrix
3277. Maximum XOR Score Subarray QueriesHard
LeetCodeArrayDynamic Programming
3279. Maximum Total Area Occupied by PistonsHard
LeetCodeArrayHash TableStringSimulation
3283. Maximum Number of Moves to Kill All PawnsHard
LeetCodeArrayMathBit ManipulationBreadth-First Search
3287. Find the Maximum Sequence Value of ArrayHard
LeetCodeArrayDynamic ProgrammingBit Manipulation
3288. Length of the Longest Increasing PathHard
LeetCodeArrayBinary SearchSorting
329. Longest Increasing Path in a MatrixHard
LeetCodeArrayDynamic ProgrammingDepth-First SearchBreadth-First Search
3292. Minimum Number of Valid Strings to Form Target IIHard
LeetCodeArrayStringBinary SearchDynamic Programming
3298. Count Substrings That Can Be Rearranged to Contain a String IIHard
LeetCodeHash TableStringSliding Window
3299. Sum of Consecutive SubsequencesHard
LeetCodeArrayHash TableDynamic Programming
330. Patching ArrayHard
LeetCodeArrayGreedy
3303. Find the Occurrence of First Almost Equal SubstringHard
LeetCodeStringString Matching
3307. Find the K-th Character in String Game IIHard
LeetCodeMathBit ManipulationRecursion
3311. Construct 2D Grid Matching Graph LayoutHard
LeetCodeArrayHash TableGraph TheoryMatrix
3312. Sorted GCD Pair QueriesHard
LeetCodeArrayHash TableMathBinary Search
3313. Find the Last Marked Nodes in TreeHard
LeetCodeTreeDepth-First Search
3317. Find the Number of Possible Ways for an EventHard
LeetCodeMathDynamic ProgrammingCombinatorics
332. Reconstruct ItineraryHard
LeetCodeArrayStringDepth-First SearchGraph Theory
3320. Count The Number of Winning SequencesHard
LeetCodeStringDynamic Programming
3321. Find X-Sum of All K-Long Subarrays IIHard
LeetCodeArrayHash TableSliding WindowHeap (Priority Queue)
3327. Check if DFS Strings Are PalindromesHard
LeetCodeArrayHash TableStringTree
3329. Count Substrings With K-Frequency Characters IIHard
LeetCodeHash TableStringSliding Window
3333. Find the Original Typed String IIHard
LeetCodeStringDynamic ProgrammingPrefix Sum
3336. Find the Number of Subsequences With Equal GCDHard
LeetCodeArrayMathDynamic ProgrammingNumber Theory
3337. Total Characters in String After Transformations IIHard
LeetCodeHash TableMathStringDynamic Programming
3343. Count Number of Balanced PermutationsHard
LeetCodeMathStringDynamic ProgrammingCombinatorics
3347. Maximum Frequency of an Element After Performing Operations IIHard
LeetCodeArrayBinary SearchSliding WindowSorting

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