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
1,399 questions at Meta · all time
- Shortest Way to Form StringmediumTwo PointersStringBinary SearchGreedyfrequency 5.0
- Similar String GroupshardArrayHash TableStringDepth-First Search+2frequency 5.0
- Sliding Subarray BeautymediumArrayHash TableSliding Windowfrequency 5.0
- Smallest Divisible Digit Product IIhardMathStringBacktrackingGreedy+1frequency 5.0
- Smallest Even MultipleeasyMathNumber Theoryfrequency 5.0
- Smallest Integer Divisible by KmediumHash TableMathPigeonhole Principlefrequency 5.0
- Smallest Palindromic Rearrangement IIhardHash TableMathStringCombinatorics+1frequency 5.0
- Smallest Range IImediumArrayMathGreedySortingfrequency 5.0
- Smallest Subarrays With Maximum Bitwise ORmediumArrayBinary SearchBit ManipulationSliding Windowfrequency 5.0
- Smallest Subsequence of Distinct CharactersmediumStringStackGreedyMonotonic Stackfrequency 5.0
- Snapshot ArraymediumArrayHash TableBinary SearchDesign+1frequency 5.0
- Solving Questions With BrainpowermediumArrayDynamic Programmingfrequency 5.0
- Sort Array By Parity IIeasyArrayTwo PointersSortingfrequency 5.0
- Sort Items by Groups Respecting DependencieshardDepth-First SearchBreadth-First SearchGraph TheoryTopological Sort+1frequency 5.0
- Sort Matrix by DiagonalsmediumArraySortingMatrixfrequency 5.0
- Sort Transformed ArraymediumArrayMathTwo PointersSortingfrequency 5.0
- Special Array With X Elements Greater Than or Equal XeasyArrayBinary SearchSortingfrequency 5.0
- Split a String Into the Max Number of Unique SubstringsmediumHash TableStringBacktrackingfrequency 5.0
- Split and Merge Array TransformationmediumArrayHash TableBreadth-First Searchfrequency 5.0
- Split the ArrayeasyArrayHash TableCountingfrequency 5.0
- Step-By-Step Directions From a Binary Tree Node to AnothermediumStringTreeDepth-First SearchBinary Tree+2frequency 5.0
- Strong Password CheckerhardStringGreedyHeap (Priority Queue)frequency 5.0
- Sum MultipleseasyMathfrequency 5.0
- Sum of DistancesmediumArrayHash TablePrefix Sumfrequency 5.0
- Sum of Distances in TreehardDynamic ProgrammingTreeDepth-First SearchGraph Theory+1frequency 5.0
- Sum of Nodes with Even-Valued GrandparentmediumTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 5.0
- Super PowmediumMathDivide and ConquerEuler's Totient FunctionEuler's Theoremfrequency 5.0
- Super Ugly NumbermediumArrayMathDynamic Programmingfrequency 5.0
- Swap Sex of EmployeeseasyDatabasefrequency 5.0
- Take Gifts From the Richest PileeasyArrayHeap (Priority Queue)Simulationfrequency 5.0
- The Earliest and Latest Rounds Where Players CompetehardDynamic ProgrammingMemoizationfrequency 5.0
- The K Weakest Rows in a MatrixeasyArrayBinary SearchSortingHeap (Priority Queue)+1frequency 5.0
- The Latest Time to Catch a BusmediumArrayTwo PointersBinary SearchSortingfrequency 5.0
- The kth Factor of nmediumMathNumber TheoryPrime Factorizationfrequency 5.0
- Total Characters in String After Transformations ImediumHash TableMathStringDynamic Programming+1frequency 5.0
- Total Distance TraveledeasyMathSimulationfrequency 5.0
- Transform Array to All Equal ElementsmediumArrayGreedyfrequency 5.0
- Transformed ArrayeasyArraySimulationfrequency 5.0
- Transpose FilemediumShellfrequency 5.0
- Trionic Array IeasyArrayfrequency 5.0
- Truncate SentenceeasyArrayStringfrequency 5.0
- Two Best Non-Overlapping EventsmediumArrayBinary SearchDynamic ProgrammingSorting+1frequency 5.0
- Type of TriangleeasyArrayMathSortingPolygonsfrequency 5.0
- Using a Robot to Print the Lexicographically Smallest StringmediumHash TableStringStackGreedyfrequency 5.0
- Vowels Game in a StringmediumMathStringBrainteaserGame Theoryfrequency 5.0
- Water Bottles IImediumMathSimulationfrequency 5.0
- Ways to Express an Integer as Sum of PowersmediumDynamic Programmingfrequency 5.0
- Ways to Make a Fair ArraymediumArrayPrefix Sumfrequency 5.0
- Zigzag Grid Traversal With SkipeasyArrayMatrixSimulationfrequency 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.