Prefix Sum

215 LeetCode questions

Difficulty Distribution

Easy
18
8%
Medium
138
64%
Hard
59
27%

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Questions

TitleDifficulty
Find the Student that Will Replace the ChalkMedium
Random Pick with WeightMedium
Subarray Sum Equals KMedium
Count Partitions with Even Sum DifferenceEasy
Product of Array Except SelfMedium
Ant on the BoundaryEasy
Contiguous ArrayMedium
Find Pivot IndexEasy
Divide Intervals Into Minimum Number of GroupsMedium
Meeting Rooms IIMedium
Plates Between CandlesMedium
Increment Submatrices by OneMedium
Max Consecutive Ones IIIMedium
Threshold Majority QueriesHard
Subarray Product Less Than KMedium
Minimum Array Changes to Make Differences EqualMedium
XOR Queries of a SubarrayMedium
Find Polygon With the Largest PerimeterMedium
Can Make Palindrome from SubstringMedium
Split Array with Equal SumHard
Maximum Coins From K Consecutive BagsMedium
Sum of Total Strength of WizardsHard
Number of ZigZag Arrays IHard
Find the Highest AltitudeEasy
Minimum Moves to Make Array ComplementaryMedium
Running Sum of 1d ArrayEasy
Split Array Largest SumHard
Maximum Score From Grid OperationsHard
Jump Game VIIMedium
Minimum Size Subarray SumMedium
Maximum Good Subarray SumMedium
Range Sum Query 2D - ImmutableMedium
Minimum Operations to Reduce X to ZeroMedium
Left and Right Sum DifferencesEasy
Range Sum Query - ImmutableEasy
Count Subarrays With Median KHard
Frequency of the Most Frequent ElementMedium
Maximum Frequency After Subarray OperationMedium
Maximum Points You Can Obtain from CardsMedium
Binary Subarrays With SumMedium
Maximum Side Length of a Square with Sum Less than or Equal to ThresholdMedium
Longest Balanced Subarray IIHard
Maximum Subarray Min-ProductMedium
XOR After Range Multiplication Queries IIHard
Sum of Absolute Differences in a Sorted ArrayMedium
Sum of DistancesMedium
Max Sum of Rectangle No Larger Than KHard
Largest Magic SquareMedium
Longest Balanced Subarray IMedium
Longest Balanced Substring IIMedium
Find All Possible Stable Binary Arrays IMedium
Find All Possible Stable Binary Arrays IIHard
Count Submatrices With Equal Frequency of X and YMedium
Minimum Cost to Make Array EqualHard
Continuous Subarray SumMedium
Count Number of Nice SubarraysMedium
Minimum Cost to Merge StonesHard
Unique Length-3 Palindromic SubsequencesMedium
Shortest Subarray with Sum at Least KHard
Subarray Sums Divisible by KMedium
Make Sum Divisible by PMedium
Car PoolingMedium
Count Vowel Strings in RangesMedium
Number of Ways to Split ArrayMedium
Maximize Subarrays After Removing One Conflicting PairHard
Minimum Number of Operations to Move All Balls to Each BoxMedium
Number of Ways to Select BuildingsMedium
Maximum Number of Robots Within BudgetHard
Maximum Sum of 3 Non-Overlapping SubarraysHard
Number of Sub-arrays With Odd SumMedium
Maximum Subarray Sum With Length Divisible by KMedium
Range Product Queries of PowersMedium
Minimum Penalty for a ShopMedium
Stone Game IIMedium
Maximum Score After Splitting a StringEasy
Maximum Population YearEasy
Minimum Operations to Make Binary Array Elements Equal to One IMedium
Find the Longest Substring Containing Vowels in Even CountsMedium
Count Beautiful Substrings IMedium
Count the Hidden SequencesMedium
Zero Array Transformation IIMedium
Shifting Letters IIMedium
Zero Array Transformation IMedium
Find the Original Typed String IIHard
Taking Maximum Energy From the Mystic DungeonMedium
Product of the Last K NumbersMedium
Minimum Average DifferenceMedium
Find Maximum Non-decreasing Array LengthHard
Minimum Operations to Make All Array Elements EqualMedium
Rearrange Array to Maximize Prefix ScoreMedium
Apply Operations to Make All Array Elements Equal to ZeroMedium
Count Partitions With Max-Min Difference at Most KMedium
Maximum Frequency of an Element After Performing Operations IMedium
Get Biggest Three Rhombus Sums in a GridMedium
Find the Minimum Amount of Time to Brew PotionsMedium
Best Time to Buy and Sell Stock using StrategyMedium
Maximum Size Subarray Sum Equals kMedium
Minimize Maximum of ArrayMedium
Maximize Number of Subsequences in a StringMedium
Number of Good Ways to Split a StringMedium

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