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
- Sentence Similarity IImediumArrayHash TableStringDepth-First Search+2frequency 5.0
- Sentence Similarity IIImediumArrayTwo PointersStringfrequency 5.0
- Sequence ReconstructionmediumArrayGraph TheoryTopological SortDirected Acyclic Graphfrequency 5.0
- Shortest Distance After Road Addition Queries ImediumArrayBreadth-First SearchGraph Theoryfrequency 5.0
- Shortest Path to Get All KeyshardArrayBit ManipulationBreadth-First SearchMatrixfrequency 5.0
- Similar String GroupshardArrayHash TableStringDepth-First Search+2frequency 5.0
- Simple Bank SystemmediumArrayHash TableDesignSimulationfrequency 5.0
- Smallest Divisible Digit Product IeasyMathEnumerationfrequency 5.0
- Smallest Divisible Digit Product IIhardMathStringBacktrackingGreedy+1frequency 5.0
- Smallest Index With Equal ValueeasyArrayfrequency 5.0
- Smallest String With SwapsmediumArrayHash TableStringDepth-First Search+3frequency 5.0
- Smallest Subtree with all the Deepest NodesmediumHash TableTreeDepth-First SearchBreadth-First Search+4frequency 5.0
- Sort Items by Groups Respecting DependencieshardDepth-First SearchBreadth-First SearchGraph TheoryTopological Sort+1frequency 5.0
- Sort the Students by Their Kth ScoremediumArraySortingMatrixfrequency 5.0
- Sorting the SentenceeasyStringSortingBubble Sortfrequency 5.0
- Sparse Matrix MultiplicationmediumArrayHash TableMatrixLinear Algebrafrequency 5.0
- Special Array IImediumArrayBinary SearchPrefix Sumfrequency 5.0
- Special Array With X Elements Greater Than or Equal XeasyArrayBinary SearchSortingfrequency 5.0
- Split Array into Consecutive SubsequencesmediumArrayHash TableGreedyHeap (Priority Queue)frequency 5.0
- Split Message Based on LimithardStringEnumerationfrequency 5.0
- Split Strings by SeparatoreasyArrayStringfrequency 5.0
- Stable Subarrays With Equal Boundary and Interior SummediumArrayHash TablePrefix Sumfrequency 5.0
- Stone GamemediumArrayMathDynamic ProgrammingMinimax+2frequency 5.0
- String Compression IIhardStringDynamic Programmingfrequency 5.0
- Student Attendance Record IeasyStringfrequency 5.0
- Sum MultipleseasyMathfrequency 5.0
- Sum of All Odd Length SubarrayseasyArrayMathPrefix Sumfrequency 5.0
- Sum of Digits of String After ConverteasyStringSimulationfrequency 5.0
- Sum of Distances in TreehardDynamic ProgrammingTreeDepth-First SearchGraph Theory+1frequency 5.0
- Sum of Perfect Square AncestorshardArrayHash TableMathTree+3frequency 5.0
- Sum of Variable Length SubarrayseasyArrayPrefix Sumfrequency 5.0
- Take Gifts From the Richest PileeasyArrayHeap (Priority Queue)Simulationfrequency 5.0
- Tallest BillboardhardArrayDynamic ProgrammingMeet in the MiddleKnapsack Problem+1frequency 5.0
- The Maze IImediumArrayDepth-First SearchBreadth-First SearchGraph Theory+6frequency 5.0
- The Most Recent Orders for Each ProductmediumDatabasefrequency 5.0
- The Number of Beautiful SubsetsmediumArrayHash TableMathDynamic Programming+3frequency 5.0
- The Time When the Network Becomes IdlemediumArrayBreadth-First SearchGraph Theoryfrequency 5.0
- Three DivisorseasyMathEnumerationNumber TheoryPrime Factorization+1frequency 5.0
- Tiling a Rectangle with the Fewest SquareshardBacktrackingfrequency 5.0
- Total Distance TraveledeasyMathSimulationfrequency 5.0
- Two Sum III - Data structure designeasyArrayHash TableTwo PointersDesign+1frequency 5.0
- Two-Letter Card GamemediumArrayHash TableStringCounting+1frequency 5.0
- Uncommon Words from Two SentenceseasyHash TableStringCountingfrequency 5.0
- Unique Morse Code WordseasyArrayHash TableStringfrequency 5.0
- Univalued Binary TreeeasyTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 5.0
- Valid Arrangement of PairshardArrayDepth-First SearchGraph TheoryEulerian Circuit+2frequency 5.0
- Validate IP AddressmediumStringfrequency 5.0
- Video StitchingmediumArrayDynamic ProgrammingGreedyfrequency 5.0
- Vowels Game in a StringmediumMathStringBrainteaserGame Theoryfrequency 5.0
- Water Bottles IImediumMathSimulationfrequency 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.