Problems
Callback's own problems and the LeetCode questions companies have been asking, in one place — filter by category, company, topic, difficulty, and how recently a question showed up.
Asked on LeetCode
3,110 questions · all time
- Minimum Rectangles to Cover PointsmediumArrayGreedySorting1 company
- Number of Distinct Binary Strings After Applying OperationsmediumMathString1 company
- Number of Ways to Split a StringmediumMathString1 company
- Palindrome RemovalhardArrayDynamic Programming1 company
- Reformat The StringeasyString1 company
- Replace All ?'s to Avoid Consecutive Repeating CharacterseasyString1 company
- Smallest Number With Given Digit ProductmediumMathGreedy1 company
- Statistics from a Large SamplemediumArrayMathProbability and Statistics1 company
- The Number of Full Rounds You Have PlayedmediumMathString1 company
- Widest Pair of Indices With Equal Range SummediumArrayHash TablePrefix Sum1 company
- Find a Corresponding Node of a Binary Tree in a Clone of That TreeeasyTreeDepth-First SearchBreadth-First SearchBinary Tree1 company
- Find the Most Common ResponsemediumArrayHash TableStringCounting1 company
- GCD Sort of an ArrayhardArrayMathUnion-FindSorting+41 company
- Maximize Fixed Points After DeletionshardArrayBinary SearchSorting1 company
- Maximum Number of Robots Within BudgethardArrayBinary SearchQueueSliding Window+31 company
- Substring Matching PatterneasyStringString Matching1 company
- Check if Word Can Be Placed In CrosswordmediumArrayMatrixEnumeration1 company
- Count Special SubsequencesmediumArrayHash TableMathEnumeration1 company
- Expressive WordsmediumArrayTwo PointersString1 company
- Maximum Score of a Node SequencehardArrayGraph TheorySortingEnumeration1 company
- Number of Ways to Build Sturdy Brick WallmediumArrayDynamic ProgrammingBit ManipulationBitmask1 company
- Binary Search Tree Iterator IImediumStackTreeDesignBinary Search Tree+21 company
- Design an Array Statistics TrackerhardHash TableBinary SearchDesignQueue+31 company
- Fair Distribution of CookiesmediumArrayDynamic ProgrammingBacktrackingBit Manipulation+11 company
- Friend Requests I: Overall Acceptance RateeasyDatabase1 company
- Lexicographically Maximum MEX ArrayhardArrayHash TableGreedyQueue1 company
- Maximize Y‑Sum by Picking a Triplet of Distinct X‑ValuesmediumArrayHash TableGreedySorting+11 company
- Maximum Bitwise AND After Increment OperationshardArrayGreedyBit ManipulationSorting1 company
- Minimum Operations to Sort a PermutationmediumArray1 company
- Minimum Operations to Sort a StringmediumString1 company
- Minimum Sum of Four Digit Number After Splitting DigitseasyMathGreedySorting1 company
- Page RecommendationsmediumDatabase1 company
- Page Recommendations IIhardDatabase1 company
- Maximum Spending After Buying ItemshardArrayGreedySortingHeap (Priority Queue)+11 company
- Unit Conversion IImediumArrayMathDepth-First SearchBreadth-First Search+11 company
- Fill a Special GridmediumArrayDivide and ConquerMatrix1 company
- Count Beautiful Substrings ImediumHash TableMathStringEnumeration+21 company
- Cut Off Trees for Golf EventhardArrayBreadth-First SearchHeap (Priority Queue)Matrix1 company
- Longest Common SubpathhardArrayBinary SearchRolling HashSuffix Array+31 company
- Maximize Number of Subsequences in a StringmediumStringGreedyPrefix Sum1 company
- Maximize the Profit as the SalesmanmediumArrayHash TableBinary SearchDynamic Programming+11 company
- Maximum Alternating Subarray SummediumArrayDynamic Programming1 company
- Maximum Bags With Full Capacity of RocksmediumArrayGreedySorting1 company
- Maximum Consecutive Floors Without Special FloorsmediumArraySorting1 company
- Minimize Array Sum Using Divisible ReplacementsmediumArrayHash TableMathGreedy+11 company
- Minimum Adjacent Swaps to Make a Valid ArraymediumArrayGreedy1 company
- Minimum Stability Factor of ArrayhardArrayMathBinary SearchGreedy+21 company
- Most Frequent IDsmediumArrayHash TableHeap (Priority Queue)Ordered Set1 company
- Next Palindrome Using Same DigitshardTwo PointersString1 company
- Product Sales Analysis IVmediumDatabase1 company
Listings only — titles, difficulty, and tags link out to LeetCode. Imported from the leetcode-company-wise-problems snapshot dated 1 June 2025. Frequency is that dataset's own relative score within a company and time range.