Problems
Callback's own problems and the LeetCode questions companies have been asking, in one place — pick a category, then filter by company, frequency, status, difficulty, topic, and language.
Asked on LeetCode
3,115 questions · all time
- Maximum Total Value of Covered IndicesmediumArrayStringDynamic ProgrammingGreedy1 company
- Maximum of Minimum Values in All SubarraysmediumArrayStackMonotonic StackCartesian Tree1 company
- Minimum Cost to Partition a Binary StringhardStringDivide and ConquerPrefix Sum1 company
- Minimum Degree of a Connected Trio in a GraphhardGraph TheoryEnumeration1 company
- Minimum Garden Perimeter to Collect Enough ApplesmediumMathBinary Search1 company
- Minimum Money Required Before TransactionshardArrayGreedySorting1 company
- Minimum Numbers of Function Calls to Make Target ArraymediumArrayGreedyBit Manipulation1 company
- Minimum Operations to Make the Array K-IncreasinghardArrayBinary SearchLongest Increasing Subsequence1 company
- Minimum Operations to Remove Adjacent Ones in MatrixhardArrayDepth-First SearchGraph TheoryMatrix+51 company
- Minimum Right Shifts to Sort the ArrayeasyArray1 company
- Number of Calls Between Two PersonsmediumDatabase1 company
- Number of Days in a MontheasyMath1 company
- Number of Sets of K Non-Overlapping Line SegmentsmediumMathDynamic ProgrammingCombinatoricsPrefix Sum1 company
- Number of Times a Driver Was a PassengermediumDatabase1 company
- Number of Unique CategoriesmediumUnion-FindInteractiveCounting1 company
- Prime ArrangementseasyMathPrimality TestSieve TheoryPrime Number Sieve1 company
- Product Sales Analysis IIeasyDatabase1 company
- Product Sales Analysis VeasyDatabase1 company
- Product's Price for Each StoreeasyDatabase1 company
- Products With Three or More Orders in Two Consecutive YearsmediumDatabase1 company
- Pseudo-Palindromic Paths in a Binary TreemediumBit ManipulationTreeDepth-First SearchBreadth-First Search+11 company
- Queries on a Permutation With KeymediumArrayBinary Indexed TreeSimulationSqrt Decomposition1 company
- Rearrange Characters to Make Target StringeasyHash TableStringCounting1 company
- Relocate MarblesmediumArrayHash TableSortingSimulation1 company
- Remove Vowels from a StringeasyString1 company
- Reverse String PrefixeasyTwo PointersString1 company
- Sales Analysis IeasyDatabase1 company
- Sales Analysis IIeasyDatabase1 company
- Sequentially Ordinal Rank TrackerhardDesignHeap (Priority Queue)Data StreamOrdered Set1 company
- Sort Features by PopularitymediumArrayHash TableStringSorting1 company
- Split BSTmediumTreeBinary Search TreeRecursionBinary Tree1 company
- Students With Invalid DepartmentseasyDatabase1 company
- Subarrays Distinct Element Sum of Squares IIhardArrayHash TableBinary Indexed TreeSegment Tree1 company
- Sum of Digits in the Minimum NumbereasyArrayMath1 company
- Sum of Number and Its ReversemediumMathEnumeration1 company
- Sum of Scores of Built StringshardStringBinary SearchRolling HashSuffix Array+41 company
- Users With Two Purchases Within Seven DaysmediumDatabase1 company
- Valid Palindrome IVmediumTwo PointersString1 company
- Warehouse ManagereasyDatabase1 company
- All Paths from Source Lead to DestinationmediumGraph TheoryTopological SortKosaraju's AlgorithmTarjan's SCC Algorithm1 company
- Alphabet Board PathmediumHash TableString1 company
- Binary String With Substrings Representing 1 To NmediumHash TableStringBit ManipulationSliding Window1 company
- Binary Tree NodesmediumDatabase1 company
- Calculate Compressed MeaneasyDatabase1 company
- Check if Number Has Equal Digit Count and Digit ValueeasyHash TableStringCounting1 company
- Class PerformancemediumDatabase1 company
- Count Caesar Cipher PairsmediumArrayHash TableMathString+11 company
- Count Cells in Overlapping Horizontal and Vertical SubstringsmediumArrayStringRolling HashString Matching+21 company
- Count Fertile Pyramids in a LandhardArrayDynamic ProgrammingMatrix1 company
- Count K-Subsequences of a String With Maximum BeautyhardHash TableMathStringGreedy+31 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.