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3056. Snaps AnalysisMedium
LeetCodeDatabase
3058. Friends With No Mutual FriendsMedium
LeetCodeDatabase
306. Additive NumberMedium
LeetCodeStringBacktracking
3064. Guess the Number Using Bitwise Questions IMedium
LeetCodeBit ManipulationInteractive
3066. Minimum Operations to Exceed Threshold Value IIMedium
LeetCodeArrayHeap (Priority Queue)Simulation
3067. Count Pairs of Connectable Servers in a Weighted Tree NetworkMedium
LeetCodeArrayTreeDepth-First Search
307. Range Sum Query - MutableMedium
LeetCodeArrayDivide and ConquerDesignBinary Indexed Tree
3070. Count Submatrices with Top-Left Element and Sum Less Than kMedium
LeetCodeArrayMatrixPrefix Sum
3071. Minimum Operations to Write the Letter Y on a GridMedium
LeetCodeArrayHash TableMatrixCounting
3073. Maximum Increasing Triplet ValueMedium
LeetCodeArrayOrdered Set
3075. Maximize Happiness of Selected ChildrenMedium
LeetCodeArrayGreedySorting
3076. Shortest Uncommon Substring in an ArrayMedium
LeetCodeArrayHash TableStringTrie
3078. Match Alphanumerical Pattern in Matrix IMedium
LeetCodeArrayHash TableStringMatrix
308. Range Sum Query 2D - MutableMedium
LeetCodeArrayDesignBinary Indexed TreeSegment Tree
3080. Mark Elements on Array by Performing QueriesMedium
LeetCodeArrayHash TableSortingHeap (Priority Queue)
3081. Replace Question Marks in String to Minimize Its ValueMedium
LeetCodeHash TableStringGreedySorting
3084. Count Substrings Starting and Ending with Given CharacterMedium
LeetCodeMathStringCounting
3085. Minimum Deletions to Make String K-SpecialMedium
LeetCodeHash TableStringGreedySorting
3087. Find Trending HashtagsMedium
LeetCodeDatabase
3089. Find Bursty BehaviorMedium
LeetCodeDatabase
309. Best Time to Buy and Sell Stock with CooldownMedium
LeetCodeArrayDynamic Programming
3091. Apply Operations to Make Sum of Array Greater Than or Equal to kMedium
LeetCodeMathGreedyEnumeration
3092. Most Frequent IDsMedium
LeetCodeArrayHash TableHeap (Priority Queue)Ordered Set
3094. Guess the Number Using Bitwise Questions IIMedium
LeetCodeBit ManipulationInteractive
3096. Minimum Levels to Gain More PointsMedium
LeetCodeArrayPrefix Sum
3097. Shortest Subarray With OR at Least K IIMedium
LeetCodeArrayBit ManipulationSliding Window
31. Next PermutationMedium
LeetCodeArrayTwo Pointers
310. Minimum Height TreesMedium
LeetCodeDepth-First SearchBreadth-First SearchGraph TheoryTopological Sort
3100. Water Bottles IIMedium
LeetCodeMathSimulation
3101. Count Alternating SubarraysMedium
LeetCodeArrayMath
3106. Lexicographically Smallest String After Operations With ConstraintMedium
LeetCodeStringGreedy
3107. Minimum Operations to Make Median of Array Equal to KMedium
LeetCodeArrayGreedySorting
3109. Find the Index of PermutationMedium
LeetCodeArrayBinary SearchDivide and ConquerBinary Indexed Tree
311. Sparse Matrix MultiplicationMedium
LeetCodeArrayHash TableMatrix
3111. Minimum Rectangles to Cover PointsMedium
LeetCodeArrayGreedySorting
3112. Minimum Time to Visit Disappearing NodesMedium
LeetCodeArrayGraph TheoryHeap (Priority Queue)Shortest Path
3115. Maximum Prime DifferenceMedium
LeetCodeArrayMathNumber Theory
3118. Friday Purchase III Medium
LeetCodeDatabase
3119. Maximum Number of Potholes That Can Be FixedMedium
LeetCodeStringGreedySorting
3121. Count the Number of Special Characters IIMedium
LeetCodeHash TableString
3122. Minimum Number of Operations to Satisfy ConditionsMedium
LeetCodeArrayDynamic ProgrammingMatrix
3124. Find Longest CallsMedium
LeetCodeDatabase
3125. Maximum Number That Makes Result of Bitwise AND ZeroMedium
LeetCodeStringGreedySorting
3126. Server Utilization TimeMedium
LeetCodeDatabase
3128. Right TrianglesMedium
LeetCodeArrayHash TableMathCombinatorics
3129. Find All Possible Stable Binary Arrays IMedium
LeetCodeDynamic ProgrammingPrefix Sum
313. Super Ugly NumberMedium
LeetCodeArrayMathDynamic Programming
3132. Find the Integer Added to Array IIMedium
LeetCodeArrayTwo PointersSortingEnumeration
3133. Minimum Array EndMedium
LeetCodeBit Manipulation
3135. Equalize Strings by Adding or Removing Characters at EndsMedium
LeetCodeStringBinary SearchDynamic ProgrammingSliding Window
3137. Minimum Number of Operations to Make Word K-PeriodicMedium
LeetCodeHash TableStringCounting
3138. Minimum Length of Anagram ConcatenationMedium
LeetCodeHash TableStringCounting
314. Binary Tree Vertical Order TraversalMedium
LeetCodeHash TableTreeDepth-First SearchBreadth-First Search
3140. Consecutive Available Seats IIMedium
LeetCodeDatabase
3143. Maximum Points Inside the SquareMedium
LeetCodeArrayHash TableStringBinary Search
3144. Minimum Substring Partition of Equal Character FrequencyMedium
LeetCodeHash TableStringDynamic ProgrammingCounting
3147. Taking Maximum Energy From the Mystic DungeonMedium
LeetCodeArrayDynamic ProgrammingPrefix Sum
3148. Maximum Difference Score in a GridMedium
LeetCodeArrayDynamic ProgrammingMatrix
3152. Special Array IIMedium
LeetCodeArrayBinary SearchPrefix Sum
3153. Sum of Digit Differences of All PairsMedium
LeetCodeArrayHash TableMathCounting

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