Array
507 problems · 338 with full explanations
78 Easy199 Medium52 Hard
Array problems involve manipulating elements stored in a contiguous block of memory. Key techniques include two-pointer traversal, prefix sums, sliding windows, and in-place partitioning. In C#, arrays are zero-indexed and fixed in size — use List<T> when you need dynamic resizing.
How to practice
To practice Array problems effectively, start with the Easy problems listed below, trace through each solution on paper, then re-implement without looking. When you can recognise the array pattern within 30 seconds of reading a new problem, move on to Medium difficulty. Use the related topic pages and our study guide for a structured progression.
Start here (Easy + explained)
All Array problems
- 4.Median of Two Sorted ArraysHard
- 11.Container With Most WaterMedium
- 15.3SumMedium
- 16.3Sum ClosestMedium
- 26.Remove Duplicates from Sorted ArrayEasy
- 27.Remove ElementEasy
- 33.Search in Rotated Sorted ArrayMedium
- 36.Valid SudokuMedium
- 37.Sudoku SolverHard
- 40.Combination Sum IIMedium
- 51.N-QueensHard
- 52.N-Queens IIHard
- 56.Merge IntervalsMedium
- 58.Length of Last WordEasy
- 63.Unique Paths IIMedium
- 66.Plus OneEasy
- 73.Set Matrix ZeroesMedium
- 75.Sort ColorsMedium
- 85.Maximal RectangleHard
- 106.Construct Binary Tree from Inorder and Postorder TraversalMedium
- 108.Convert Sorted Array to Binary Search TreeEasy
- 118.Pascal's TriangleEasy
- 120.TriangleMedium
- 122.Best Time to Buy and Sell Stock IIMedium
- 135.CandyHard
- 137.Single Number IIMedium
- 154.Find Minimum in Rotated Sorted Array IIHard
- 162.Find Peak ElementMedium
- 174.Dungeon GameHard
- 179.Largest NumberMedium
- 189.Rotate ArrayMedium
- 198.House RobberMedium
- 212.Word Search IIHard
- 213.House Robber IIMedium
- 218.The Skyline ProblemHard
- 219.Contains Duplicate IIEasy
- 220.Contains Duplicate IIIHard
- 221.Maximal SquareMedium
- 239.Sliding Window MaximumHard
- 278.First Bad VersionEasy
- 303.Range Sum Query - ImmutableEasy
- 304.Range Sum Query 2D - ImmutableMedium
- 309.Best Time to Buy and Sell Stock with CooldownMedium
- 321.Create Maximum NumberUnknown
- 324.Wiggle Sort IIMedium
- 329.Longest Increasing Path in a MatrixHard
- 330.Patching ArrayHard
- 350.Intersection of Two Arrays IIEasy
- 352.Data Stream as Disjoint IntervalsUnknown
- 368.Largest Divisible SubsetMedium
- 407.Trapping Rain Water IIHard
- 416.Partition Equal Subset SumMedium
- 417.Pacific Atlantic Water FlowMedium
- 474.Ones and ZeroesMedium
- 477.Total Hamming DistanceMedium
- 494.Target SumMedium
- 498.Diagonal TraverseMedium
- 500.Keyboard RowEasy
- 502.IPOUnknown
- 539.Minimum Time DifferenceMedium
- 554.Brick WallMedium
- 593.Valid SquareMedium
- 594.Longest Harmonious SubsequenceEasy
- 605.Can Place FlowersEasy
- 611.Valid Triangle NumberMedium
- 624.Maximum Distance in ArraysUnknown
- 632.Smallest Range Covering Elements from K ListsHard
- 641.Design Circular DequeUnknown
- 646.Maximum Length of Pair ChainMedium
- 658.Find K Closest ElementsMedium
- 679.24 GameHard
- 689.Maximum Sum of 3 Non-Overlapping SubarraysUnknown
- 699.Falling SquaresHard
- 706.Design HashMapUnknown
- 717.1-bit and 2-bit CharactersEasy
- 719.Find K-th Smallest Pair DistanceHard
- 729.My Calendar IMedium
- 731.My Calendar IIUnknown
- 744.Find Smallest Letter Greater Than TargetEasy
- 752.Open the LockMedium
- 756.Pyramid Transition MatrixUnknown
- 757.Set Intersection Size At Least TwoUnknown
- 763.Partition LabelsMedium
- 769.Max Chunks To Make SortedMedium
- 773.Sliding PuzzleHard
- 778.Swim in Rising WaterHard
- 781.Rabbits in ForestMedium
- 799.Champagne TowerMedium
- 807.Max Increase to Keep City SkylineMedium
- 812.Largest Triangle AreaHard
- 820.Short Encoding of WordsMedium
- 821.Shortest Distance to a CharacterEasy
- 822.Card Flipping GameUnknown
- 825.Friends Of Appropriate AgesMedium
- 826.Most Profit Assigning WorkMedium
- 827.Making A Large IslandHard
- 832.Flipping an ImageEasy
- 838.Push DominoesMedium
- 840.Magic Squares In GridMedium
- 851.Loud and RichMedium
- 857.Minimum Cost to Hire K WorkersHard
- 860.Lemonade ChangeEasy
- 862.Shortest Subarray with Sum at Least KHard
- 873.Length of Longest Fibonacci SubsequenceMedium
- 874.Walking Robot SimulationMedium
- 880.Decoded String at IndexMedium
- 884.Uncommon Words from Two SentencesEasy
- 885.Spiral Matrix IIIMedium
- 890.Find and Replace PatternMedium
- 892.Surface Area of 3D ShapesMedium
- 898.Bitwise ORs of SubarraysMedium
- 902.Numbers At Most N Given Digit SetHard
- 904.Fruit Into BasketsMedium
- 905.Sort Array By ParityEasy
- 908.Smallest Range IEasy
- 909.Snakes and LaddersMedium
- 912.Sort an ArrayMedium
- 916.Word SubsetsMedium
- 928.Minimize Malware Spread IIUnknown
- 944.Delete Columns to Make SortedEasy
- 947.Most Stones Removed with Same Row or ColumnMedium
- 955.Delete Columns to Make Sorted IIMedium
- 959.Regions Cut By SlashesUnknown
- 960.Delete Columns to Make Sorted IIIHard
- 961.N-Repeated Element in Size 2N ArrayUnknown
- 962.Maximum Width RampMedium
- 966.Vowel SpellcheckerMedium
- 973.K Closest Points to OriginMedium
- 976.Largest Perimeter TriangleMedium
- 983.Minimum Cost For TicketsMedium
- 995.Minimum Number of K Consecutive Bit FlipsUnknown
- 1000.Minimum Cost to Merge StonesHard
- 1007.Minimum Domino Rotations For Equal RowMedium
- 1011.Capacity To Ship Packages Within D DaysMedium
- 1014.Best Sightseeing PairMedium
- 1018.Binary Prefix Divisible By 5Easy
- 1039.Minimum Score Triangulation of PolygonMedium
- 1052.Grumpy Bookstore OwnerMedium
- 1061.Lexicographically Smallest Equivalent StringMedium
- 1072.Flip Columns For Maximum Number of Equal RowsMedium
- 1105.Filling Bookcase ShelvesMedium
- 1128.Number of Equivalent Domino PairsEasy
- 1140.Stone Game IIMedium
- 1200.Minimum Absolute DifferenceEasy
- 1233.Remove Sub-Folders from the FilesystemMedium
- 1248.Count Number of Nice SubarraysMedium
- 1262.Greatest Sum Divisible by ThreeMedium
- 1266.Minimum Time Visiting All PointsEasy
- 1267.Count Servers that CommunicateMedium
- 1277.Count Square Submatrices with All OnesMedium
- 1287.Element Appearing More Than 25% In Sorted ArrayEasy
- 1295.Find Numbers with Even Number of DigitsEasy
- 1298.Maximum Candies You Can Get from BoxesUnknown
- 1304.Find N Unique Integers Sum up to ZeroUnknown
- 1310.XOR Queries of a SubarrayMedium
- 1331.Rank Transform of an ArrayUnknown
- 1346.Check If N and Its Double ExistUnknown
- 1352.Product of the Last K NumbersMedium
- 1353.Maximum Number of Events That Can Be AttendedMedium
- 1368.Minimum Cost to Make at Least One Valid Path in a GridHard
- 1380.Lucky Numbers in a MatrixEasy
- 1381.Design a Stack With Increment OperationUnknown
- 1394.Find Lucky Integer in an ArrayUnknown
- 1395.Count Number of TeamsUnknown
- 1408.String Matching in an ArrayUnknown
- 1437.Check If All 1's Are at Least Length K Places AwayMedium
- 1438.Longest Continuous Subarray With Absolute Diff Less Than or Equal to LimitMedium
- 1450.Number of Students Doing Homework at a Given TimeEasy
- 1455.Check If a Word Occurs As a Prefix of Any Word in a SentenceUnknown
- 1458.Max Dot Product of Two SubsequencesMedium
- 1460.Make Two Arrays Equal by Reversing SubarraysUnknown
- 1465.Maximum Area of a Piece of Cake After Horizontal and Vertical CutsUnknown
- 1475.Final Prices With a Special Discount in a ShopEasy
- 1482.Minimum Number of Days to Make m BouquetsMedium
- 1486.XOR Operation in an ArrayEasy
- 1488.Avoid Flood in The CityUnknown
- 1493.Longest Subarray of 1's After Deleting One ElementMedium
- 1497.Check If Array Pairs Are Divisible by kMedium
- 1498.Number of Subsequences That Satisfy the Given Sum ConditionMedium
- 1503.Last Moment Before All Ants Fall Out of a PlankUnknown
- 1504.Count Submatrices With All OnesUnknown
- 1508.Range Sum of Sorted Subarray SumsMedium
- 1509.Minimum Difference Between Largest and Smallest Value in Three MovesMedium
- 1514.Path with Maximum ProbabilityMedium
- 1524.Number of Sub-arrays With Odd SumMedium
- 1526.Minimum Number of Increments on Subarrays to Form a Target ArrayUnknown
- 1534.Count Good TripletsEasy
- 1536.Minimum Swaps to Arrange a Binary GridUnknown
- 1550.Three Consecutive OddsUnknown
- 1552.Magnetic Force Between Two BallsMedium
- 1568.Minimum Number of Days to Disconnect IslandUnknown
- 1574.Shortest Subarray to be Removed to Make Array SortedUnknown
- 1578.Minimum Time to Make Rope ColorfulMedium
- 1582.Special Positions in a Binary MatrixUnknown
- 1590.Make Sum Divisible by PMedium
- 1605.Find Valid Matrix Given Row and Column SumsUnknown
- 1622.Fancy SequenceUnknown
- 1636.Sort Array by Increasing FrequencyUnknown
- 1639.Number of Ways to Form a Target String Given a DictionaryHard
- 1652.Defuse the BombUnknown
- 1671.Minimum Number of Removals to Make Mountain ArrayHard
- 1684.Count the Number of Consistent StringsEasy
- 1695.Maximum Erasure ValueMedium
- 1700.Number of Students Unable to Eat LunchEasy
- 1701.Average Waiting TimeMedium
- 1718.Construct the Lexicographically Largest Valid SequenceUnknown
- 1726.Tuple with Same ProductMedium
- 1727.Largest Submatrix With RearrangementsUnknown
- 1733.Minimum Number of People to TeachUnknown
- 1749.Maximum Absolute Sum of Any SubarrayMedium
- 1751.Maximum Number of Events That Can Be Attended IIUnknown
- 1752.Check if Array Is Sorted and RotatedEasy
- 1760.Minimum Limit of Balls in a BagMedium
- 1765.Map of Highest PeakMedium
- 1766.Tree of CoprimesUnknown
- 1769.Minimum Number of Operations to Move All Balls to Each BoxMedium
- 1779.Find Nearest Point That Has the Same X or Y CoordinateUnknown
- 1799.Maximize Score After N OperationsUnknown
- 1800.Maximum Ascending Subarray SumUnknown
- 1823.Find the Winner of the Circular GameMedium
- 1829.Maximum XOR for Each QueryUnknown
- 1859.Sorting the SentenceUnknown
- 1861.Rotating the BoxEasy
- 1863.Sum of All Subset XOR TotalsUnknown
- 1865.Finding Pairs With a Certain SumUnknown
- 1877.Minimize Maximum Pair Sum in ArrayEasy
- 1878.Get Biggest Three Rhombus Sums in a GridUnknown
- 1886.Determine Whether Matrix Can Be Obtained By RotationUnknown
- 1894.Find the Student that Will Replace the ChalkUnknown
- 1895.Largest Magic SquareUnknown
- 1905.Count Sub IslandsUnknown
- 1911.Maximum Alternating Subsequence SumUnknown
- 1912.Design Movie Rental SystemUnknown
- 1920.Build Array from PermutationEasy
- 1937.Maximum Number of Points with CostUnknown
- 1938.Maximum Genetic Difference QueryUnknown
- 1942.The Number of the Smallest Unoccupied ChairUnknown
- 1970.Last Day Where You Can Still CrossUnknown
- 1975.Maximum Matrix SumUnknown
- 1980.Find Unique Binary StringMedium
- 1994.The Number of Good SubsetsUnknown
- 1995.Count Special QuadrupletsUnknown
- 2007.Find Original Array From Doubled ArrayUnknown
- 2008.Maximum Earnings From TaxiUnknown
- 2009.Minimum Number of Operations to Make Array ContinuousUnknown
- 2016.Maximum Difference Between Increasing ElementsEasy
- 2017.Grid GameUnknown
- 2022.Convert 1D Array Into 2D ArrayMedium
- 2028.Find Missing ObservationsUnknown
- 2033.Minimum Operations to Make a Uni-Value GridUnknown
- 2040.Kth Smallest Product of Two Sorted ArraysUnknown
- 2043.Simple Bank SystemUnknown
- 2044.Count Number of Maximum Bitwise-OR SubsetsMedium
- 2053.Kth Distinct String in an ArrayUnknown
- 2054.Two Best Non-Overlapping EventsUnknown
- 2058.Find the Minimum and Maximum Number of Nodes Between Critical PointsUnknown
- 2064.Minimized Maximum of Products Distributed to Any StoreUnknown
- 2070.Most Beautiful Item for Each QueryMedium
- 2071.Maximum Number of Tasks You Can AssignUnknown
- 2090.K Radius Subarray AveragesMedium
- 2091.Removing Minimum and Maximum From ArrayMedium
- 2094.Finding 3-Digit Even NumbersUnknown
- 2099.Find Subsequence of Length K With the Largest SumEasy
- 2106.Maximum Fruits Harvested After at Most K StepsUnknown
- 2109.Adding Spaces to a StringEasy
- 2110.Number of Smooth Descent Periods of a StockMedium
- 2115.Find All Possible Recipes from Given SuppliesUnknown
- 2125.Number of Laser Beams in a BankMedium
- 2131.Longest Palindrome by Concatenating Two Letter WordsMedium
- 2134.Minimum Swaps to Group All 1's Together IIMedium
- 2140.Solving Questions With BrainpowerMedium
- 2141.Maximum Running Time of N ComputersUnknown
- 2145.Count the Hidden SequencesUnknown
- 2154.Keep Multiplying Found Values by TwoEasy
- 2161.Partition Array According to Given PivotMedium
- 2163.Minimum Difference in Sums After Removal of ElementsUnknown
- 2176.Count Equal and Divisible Pairs in an ArrayUnknown
- 2179.Count Good Triplets in an ArrayUnknown
- 2185.Counting Words With a Given PrefixEasy
- 2191.Sort the Jumbled NumbersUnknown
- 2196.Create Binary Tree From DescriptionsMedium
- 2197.Replace Non-Coprime Numbers in ArrayUnknown
- 2200.Find All K-Distant Indices in an ArrayEasy
- 2206.Divide Array Into Equal PairsEasy
- 2210.Count Hills and Valleys in an ArrayUnknown
- 2211.Count Collisions on a RoadUnknown
- 2221.Find Triangular Sum of an ArrayMedium
- 2225.Find Players With Zero or One LossesMedium
- 2226.Maximum Candies Allocated to K ChildrenMedium
- 2257.Count Unguarded Cells in the GridUnknown
- 2270.Number of Ways to Split ArrayMedium
- 2271.Maximum White Tiles Covered by a CarpetUnknown
- 2273.Find Resultant Array After Removing AnagramsUnknown
- 2275.Largest Combination With Bitwise AND Greater Than ZeroMedium
- 2285.Maximum Total Importance of RoadsHard
- 2290.Minimum Obstacle Removal to Reach CornerHard
- 2294.Partition Array Such That Maximum Difference Is KHard
- 2300.Successful Pairs of Spells and PotionsMedium
- 2302.Count Subarrays With Score Less Than KHard
- 2311.Longest Binary Subsequence Less Than or Equal to KMedium
- 2322.Minimum Score After Removals on a TreeUnknown
- 2326.Spiral Matrix IVHard
- 2342.Max Sum of a Pair With Equal Sum of DigitsMedium
- 2344.Minimum Deletions to Make Array DivisibleHard
- 2348.Number of Zero-Filled SubarraysMedium
- 2364.Count Number of Bad PairsHard
- 2369.Check if There is a Valid Partition For The ArrayMedium
- 2370.Longest Ideal SubsequenceMedium
- 2381.Shifting Letters IIMedium
- 2389.Longest Subsequence With Limited SumEasy
- 2392.Build a Matrix With ConditionsHard
- 2401.Longest Nice SubarrayMedium
- 2402.Meeting Rooms IIIHard
- 2406.Divide Intervals Into Minimum Number of GroupsMedium
- 2410.Maximum Matching of Players With TrainersMedium
- 2411.Smallest Subarrays With Maximum Bitwise ORMedium
- 2416.Sum of Prefix Scores of StringsHard
- 2418.Sort the PeopleEasy
- 2419.Longest Subarray With Maximum Bitwise ANDMedium
- 2425.Bitwise XOR of All PairingsMedium
- 2435.Paths in Matrix Whose Sum Is Divisible by KHard
- 2438.Range Product Queries of PowersUnknown
- 2444.Count Subarrays With Fixed BoundsHard
- 2458.Height of Binary Tree After Subtree Removal QueriesUnknown
- 2460.Apply Operations to an ArrayEasy
- 2461.Maximum Sum of Distinct Subarrays With Length KMedium
- 2463.Minimum Total Distance TraveledHard
- 2467.Most Profitable Path in a TreeMedium
- 2491.Divide Players Into Teams of Equal SkillMedium
- 2501.Longest Square Streak in an ArrayMedium
- 2503.Maximum Number of Points From Grid QueriesHard
- 2528.Maximize the Minimum Powered CityHard
- 2529.Maximum Count of Positive Integer and Negative IntegerEasy
- 2530.Maximal Score After Applying K OperationsMedium
- 2536.Increment Submatrices by OneMedium
- 2537.Count the Number of Good SubarraysMedium
- 2551.Put Marbles in BagsHard
- 2553.Separate the Digits in an ArrayMedium
- 2554.Maximum Number of Integers to Choose From a Range IMedium
- 2558.Take Gifts From the Richest PileEasy
- 2559.Count Vowel Strings in RangesMedium
- 2560.House Robber IVMedium
- 2561.Rearranging FruitsHard
- 2563.Count the Number of Fair PairsMedium
- 2570.Merge Two 2D Arrays by Summing ValuesMedium
- 2572.Count the Number of Square-Free SubsetsUnknown
- 2577.Minimum Time to Visit a Cell In a GridHard
- 2582.Pass the PillowUnknown
- 2593.Find Score of an Array After Marking All ElementsMedium
- 2594.Minimum Time to Repair CarsUnknown
- 2598.Smallest Missing Non-negative Integer After OperationsUnknown
- 2601.Prime Subtraction OperationHard
- 2616.Minimize the Maximum Difference of PairsHard
- 2639.Find the Width of Columns of a GridUnknown
- 2640.Find the Score of All Prefixes of an ArrayMedium
- 2654.Minimum Number of Operations to Make All Array Elements Equal to 1Unknown
- 2657.Find the Prefix Common Array of Two ArraysMedium
- 2658.Maximum Number of Fish in a GridMedium
- 2661.First Completely Painted Row or ColumnMedium
- 2678.Number of Senior CitizensEasy
- 2683.Neighboring Bitwise XORMedium
- 2684.Maximum Number of Moves in a GridMedium
- 2707.Extra Characters in a StringMedium
- 2718.Sum of Matrix After QueriesUnknown
- 2749.Minimum Operations to Make the Integer ZeroUnknown
- 2751.Robot CollisionsUnknown
- 2762.Continuous SubarraysMedium
- 2765.Longest Alternating SubarrayEasy
- 2779.Maximum Beauty of an Array After Applying OperationUnknown
- 2780.Minimum Index of a Valid SplitMedium
- 2799.Count Complete Subarrays in an ArrayMedium
- 2807.Insert Greatest Common Divisors in Linked ListMedium
- 2818.Apply Operations to Maximize ScoreUnknown
- 2845.Count of Interesting SubarraysMedium
- 2873.Maximum Value of an Ordered Triplet IEasy
- 2874.Maximum Value of an Ordered Triplet IIMedium
- 2900.Longest Unequal Adjacent Groups Subsequence IEasy
- 2901.Longest Unequal Adjacent Groups Subsequence IIUnknown
- 2906.Construct Product MatrixEasy
- 2909.Minimum Sum of Mountain Triplets IIMedium
- 2916.Subarrays Distinct Element Sum of Squares IIUnknown
- 2918.Minimum Equal Sum of Two Arrays After Replacing ZerosUnknown
- 2938.Separate Black and White BallsMedium
- 2940.Find Building Where Alice and Bob Can MeetUnknown
- 2942.Find Words Containing CharacterEasy
- 2946.Matrix Similarity After Cyclic ShiftsEasy
- 2948.Make Lexicographically Smallest Array by Swapping ElementsUnknown
- 2962.Count Subarrays Where Max Element Appears at Least K TimesMedium
- 2965.Find Missing and Repeated ValuesUnknown
- 2966.Divide Array Into Arrays With Max DifferenceMedium
- 2975.Maximum Square Area by Removing Fences From a FieldUnknown
- 2976.Minimum Cost to Convert String IMedium
- 2977.Minimum Cost to Convert String IIUnknown
- 2980.Check if Bitwise OR Has Trailing ZerosEasy
- 3000.Maximum Area of Longest Diagonal RectangleMedium
- 3001.Minimum Moves to Capture The QueenUnknown
- 3005.Count Elements With Maximum FrequencyEasy
- 3010.Divide an Array Into Subarrays With Minimum Cost IEasy
- 3011.Find if Array Can Be SortedUnknown
- 3013.Divide an Array Into Subarrays With Minimum Cost IIUnknown
- 3025.Find the Number of Ways to Place People IUnknown
- 3027.Find the Number of Ways to Place People IIUnknown
- 3042.Count Prefix and Suffix Pairs IEasy
- 3043.Find the Length of the Longest Common PrefixEasy
- 3047.Find the Largest Area of Square Inside Two RectanglesEasy
- 3066.Minimum Operations to Exceed Threshold Value IIMedium
- 3068.Find the Maximum Sum of Node ValuesHard
- 3070.Count Submatrices with Top-Left Element and Sum Less Than kEasy
- 3074.Apple Redistribution into BoxesUnknown
- 3085.Minimum Deletions to Make String K-SpecialEasy
- 3097.Shortest Subarray With OR at Least K IIMedium
- 3105.Longest Strictly Increasing or Strictly Decreasing SubarrayEasy
- 3108.Minimum Cost Walk in Weighted GraphUnknown
- 3116.Kth Smallest Amount With Single Denomination CombinationMedium
- 3122.Minimum Number of Operations to Satisfy ConditionsUnknown
- 3129.Find All Possible Stable Binary Arrays IUnknown
- 3130.Find All Possible Stable Binary Arrays IIUnknown
- 3133.Minimum Array EndMedium
- 3147.Taking Maximum Energy From the Mystic DungeonUnknown
- 3149.Find the Minimum Cost Array PermutationMedium
- 3151.Special Array IUnknown
- 3152.Special Array IIMedium
- 3160.Find the Number of Distinct Colors Among the BallsMedium
- 3169.Count Days Without MeetingsMedium
- 3186.Maximum Total Damage With Spell CastingMedium
- 3190.Find Minimum Operations to Make All Elements Divisible by ThreeEasy
- 3191.Minimum Operations to Make Binary Array Elements Equal to One IMedium
- 3192.Minimum Operations to Make Binary Array Elements Equal to One IIEasy
- 3195.Find the Minimum Area to Cover All Ones IUnknown
- 3197.Find the Minimum Area to Cover All Ones IIUnknown
- 3201.Find the Maximum Length of Valid Subsequence IEasy
- 3202.Find the Maximum Length of Valid Subsequence IIUnknown
- 3208.Alternating Groups IIUnknown
- 3212.Count Submatrices With Equal Frequency of X and YUnknown
- 3217.Delete Nodes From Linked List Present in ArrayMedium
- 3228.Maximum Number of Operations to Move Ones to the EndUnknown
- 3234.Count the Number of Substrings With Dominant OnesEasy
- 3254.Find the Power of K-Size Subarrays IMedium
- 3264.Final Array State After K Multiplication Operations IEasy
- 3289.The Two Sneaky Numbers of DigitvilleMedium
- 3296.Minimum Number of Seconds to Make Mountain Height ZeroMedium
- 3310.Remove Methods From ProjectUnknown
- 3315.Construct the Minimum Bitwise Array IIUnknown
- 3318.Find X-Sum of All K-Long Subarrays IEasy
- 3321.Find X-Sum of All K-Long Subarrays IIUnknown
- 3341.Find Minimum Time to Reach Last Room IMedium
- 3342.Find Minimum Time to Reach Last Room IIMedium
- 3346.Maximum Frequency of an Element After Performing Operations IMedium
- 3347.Maximum Frequency of an Element After Performing Operations IIUnknown
- 3349.Adjacent Increasing Subarrays Detection IUnknown
- 3350.Adjacent Increasing Subarrays Detection IIMedium
- 3354.Make Array Elements Equal to ZeroUnknown
- 3355.Zero Array Transformation IUnknown
- 3356.Zero Array Transformation IIUnknown
- 3362.Zero Array Transformation IIIUnknown
- 3363.Find the Maximum Number of Fruits CollectedUnknown
- 3375.Minimum Operations to Make Array Values Equal to KMedium
- 3379.Transformed ArrayMedium
- 3381.Maximum Subarray Sum With Length Divisible by KMedium
- 3392.Count Subarrays of Length Three With a ConditionMedium
- 3394.Check if Grid can be Cut into SectionsUnknown
- 3396.Minimum Number of Operations to Make Elements in Array DistinctMedium
- 3397.Maximum Number of Distinct Elements After OperationsUnknown
- 3403.Find the Lexicographically Largest String From the Box IUnknown
- 3418.Maximum Amount of Money Robot Can EarnMedium
- 3423.Maximum Difference Between Adjacent Elements in a Circular ArrayUnknown
- 3432.Count Partitions with Even Sum DifferenceEasy
- 3433.Count Mentions Per UserMedium
- 3439.Reschedule Meetings for Maximum Free Time IEasy
- 3440.Reschedule Meetings for Maximum Free Time IIUnknown
- 3443.Maximum Manhattan Distance After K ChangesUnknown
- 3446.Sort Matrix by DiagonalsMedium
- 3459.Length of Longest V-Shaped Diagonal SegmentEasy
- 3477.Fruits Into Baskets IIMedium
- 3479.Fruits Into Baskets IIIUnknown
- 3480.Maximize Subarrays After Removing One Conflicting PairEasy
- 3484.Design SpreadsheetMedium
- 3487.Maximum Unique Subarray Sum After DeletionMedium
- 3494.Find the Minimum Amount of Time to Brew PotionsUnknown
- 3495.Minimum Operations to Make Array Elements ZeroEasy
- 3507.Minimum Pair Removal to Sort Array IUnknown
- 3508.Implement RouterUnknown
- 3510.Minimum Pair Removal to Sort Array IIUnknown
- 3512.Minimum Operations to Make Array Sum Divisible by KUnknown
- 3516.Find Closest PersonUnknown
- 3531.Count Covered Buildings+Unknown
- 3539.Find Sum of Array Product of Magical SequencesUnknown
- 3542.Minimum Operations to Convert All Elements to ZeroUnknown
- 3546.Equal Sum Grid Partition IUnknown
- 3548.Equal Sum Grid Partition IIUnknown
- 3562.Maximum Profit from Trading Stocks with DiscountsUnknown
- 3567.Minimum Absolute Difference in Sliding SubmatrixUnknown
- 3573.Best Time to Buy and Sell Stock VUnknown
- 3578.Count Partitions With Max-Min Difference at Most KUnknown
- 3583.Count Special TripletsUnknown
- 3606.Coupon Code ValidatorUnknown
- 3607.Power Grid MaintenanceUnknown
- 3623.Count Number of Trapezoids IUnknown
- 3625.Count Number of Trapezoids IIUnknown
- 3634.Minimum Removals to Balance ArrayUnknown
- 3637.Trionic Array IUnknown
- 3640.Trionic Array IIUnknown
- 3643.Flip Square Submatrix VerticallyUnknown
- 3652.Best Time to Buy and Sell Stock using StrategyUnknown
- 3661.Maximum Walls Destroyed by RobotsUnknown
- 3719.Longest Balanced Subarray IUnknown
- 3721.Longest Balanced Subarray IIUnknown