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
2,011 questions at Amazon · all time
- Robot CollisionshardArrayStackSortingSimulationfrequency 7.2
- Score After Flipping MatrixmediumArrayGreedyBit ManipulationMatrixfrequency 7.2
- Shopping OffersmediumArrayDynamic ProgrammingBacktrackingBit Manipulation+4frequency 7.2
- Shortest Distance to Target String in a Circular ArrayeasyArrayStringfrequency 7.2
- Shuffle an ArraymediumArrayMathDesignRandomizedfrequency 7.2
- Sign of the Product of an ArrayeasyArrayMathfrequency 7.2
- Sleepeasyfrequency 7.2
- Sliding PuzzlehardArrayDynamic ProgrammingBacktrackingBreadth-First Search+5frequency 7.2
- Smallest Good BasehardMathBinary Searchfrequency 7.2
- Smallest Number With All Set BitseasyMathBit Manipulationfrequency 7.2
- Sort the Matrix DiagonallymediumArraySortingMatrixfrequency 7.2
- Sort the PeopleeasyArrayHash TableStringSortingfrequency 7.2
- Special Positions in a Binary MatrixeasyArrayMatrixfrequency 7.2
- Split a String Into the Max Number of Unique SubstringsmediumHash TableStringBacktrackingfrequency 7.2
- Stock Price FluctuationmediumHash TableDesignHeap (Priority Queue)Data Stream+1frequency 7.2
- Stone Game IIIhardArrayMathDynamic ProgrammingMinimax+2frequency 7.2
- Strange PrinterhardStringDynamic Programmingfrequency 7.2
- Stream of CharactershardArrayStringDesignTrie+2frequency 7.2
- String Without AAA or BBBmediumStringGreedyfrequency 7.2
- Strong Password CheckerhardStringGreedyHeap (Priority Queue)frequency 7.2
- Subtract the Product and Sum of Digits of an IntegereasyMathfrequency 7.2
- Super Egg DrophardMathBinary SearchDynamic Programmingfrequency 7.2
- Surface Area of 3D ShapeseasyArrayMathGeometryMatrixfrequency 7.2
- The Earliest and Latest Rounds Where Players CompetehardDynamic ProgrammingMemoizationfrequency 7.2
- Three Consecutive OddseasyArrayfrequency 7.2
- Time Needed to Inform All EmployeesmediumTreeDepth-First SearchBreadth-First Searchfrequency 7.2
- Tuple with Same ProductmediumArrayHash TableCountingfrequency 7.2
- Ugly Number IIImediumMathBinary SearchCombinatoricsNumber Theory+4frequency 7.2
- Unique Email AddresseseasyArrayHash TableStringfrequency 7.2
- Widest Vertical Area Between Two Points Containing No PointseasyArraySortingfrequency 7.2
- XOR After Range Multiplication Queries IIhardArrayDivide and ConquerPrefix Sumfrequency 7.2
- 1-bit and 2-bit CharacterseasyArrayfrequency 5.0
- Add Two Promiseseasyfrequency 5.0
- Advantage ShufflemediumArrayTwo PointersGreedySortingfrequency 5.0
- Alice and Bob Playing Flower GamemediumMathfrequency 5.0
- Ant on the BoundaryeasyArraySimulationPrefix Sumfrequency 5.0
- Array NestingmediumArrayDepth-First Searchfrequency 5.0
- Balanced K-Factor DecompositionmediumMathBacktrackingNumber Theoryfrequency 5.0
- Beautiful ArrangementmediumArrayDynamic ProgrammingBacktrackingBit Manipulation+1frequency 5.0
- Beautiful ArraymediumArrayMathDivide and Conquerfrequency 5.0
- Binary Prefix Divisible By 5easyArrayBit Manipulationfrequency 5.0
- Binary Tree Longest Consecutive SequencemediumTreeDepth-First SearchBinary TreeDP on Treesfrequency 5.0
- Binary Trees With FactorsmediumArrayHash TableDynamic ProgrammingSortingfrequency 5.0
- Block Placement QuerieshardArrayBinary SearchBinary Indexed TreeSegment Tree+1frequency 5.0
- Build an Array With Stack OperationsmediumArrayStackSimulationfrequency 5.0
- Button with Longest Push TimeeasyArrayfrequency 5.0
- Buy Two ChocolateseasyArrayGreedySortingfrequency 5.0
- Check Completeness of a Binary TreemediumTreeBreadth-First SearchBinary Treefrequency 5.0
- Check Distances Between Same LetterseasyArrayHash TableStringfrequency 5.0
- Check If a Word Occurs As a Prefix of Any Word in a SentenceeasyTwo PointersStringString Matchingfrequency 5.0
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.