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
- Sum of Variable Length SubarrayseasyArrayPrefix Sum2 companies
- Longest Even Odd Subarray With ThresholdeasyArraySliding Window2 companies
- Number of Ways to Assign Edge Weights ImediumMathTreeDepth-First Search2 companies
- Shortest Cycle in a GraphhardBreadth-First SearchGraph Theory2 companies
- Timeout Cancellationeasy2 companies
- Array Reduce Transformationeasy2 companies
- Best Team With No ConflictsmediumArrayDynamic ProgrammingSortingLongest Increasing Subsequence2 companies
- Check if Strings Can be Made Equal With Operations IeasyString2 companies
- Coloring A BordermediumArrayDepth-First SearchBreadth-First SearchMatrix2 companies
- Count Residue PrefixeseasyHash TableString2 companies
- Count Subarrays With Majority Element IIhardArrayHash TableDivide and ConquerSegment Tree+22 companies
- Fill Missing Dataeasy2 companies
- Find the Distinct Difference ArrayeasyArrayHash Table2 companies
- Longest ZigZag Path in a Binary TreemediumDynamic ProgrammingTreeDepth-First SearchBinary Tree+12 companies
- Maximum Distance Between a Pair of ValuesmediumArrayTwo PointersBinary Search2 companies
- Maximum Number of Coins You Can GetmediumArrayMathGreedySorting+12 companies
- Minimum Additions to Make Valid StringmediumStringDynamic ProgrammingStackGreedy2 companies
- Minimum Suffix FlipsmediumStringGreedy2 companies
- Number of Employees Who Met the TargeteasyArray2 companies
- Partition Array into Disjoint IntervalsmediumArray2 companies
- Range Frequency QueriesmediumArrayHash TableBinary SearchDesign+12 companies
- Rearrange Words in a SentencemediumStringSorting2 companies
- Reducing DisheshardArrayDynamic ProgrammingGreedySorting2 companies
- Sort Even and Odd Indices IndependentlyeasyArraySorting2 companies
- Transform Array to All Equal ElementsmediumArrayGreedy2 companies
- Binary Tree TilteasyTreeDepth-First SearchBinary TreeDP on Trees2 companies
- Dinner Plate StackshardHash TableStackDesignHeap (Priority Queue)2 companies
- Divide an Array Into Subarrays With Minimum Cost IIhardArrayHash TableSliding WindowHeap (Priority Queue)2 companies
- Get Maximum in Generated ArrayeasyArraySimulation2 companies
- Grid Teleportation TraversalmediumArrayHash TableBreadth-First SearchMatrix2 companies
- Maximum and Minimum Sums of at Most Size K SubsequencesmediumArrayMathDynamic ProgrammingSorting+12 companies
- N-ary Tree Preorder TraversaleasyStackTreeDepth-First Search2 companies
- Non-negative Integers without Consecutive OneshardDynamic Programming2 companies
- Score After Flipping MatrixmediumArrayGreedyBit ManipulationMatrix2 companies
- Sort the Matrix DiagonallymediumArraySortingMatrix2 companies
- Coupon Code ValidatoreasyArrayHash TableStringSorting2 companies
- Delete Greatest Value in Each RoweasyArraySortingHeap (Priority Queue)Matrix+12 companies
- Flip Square Submatrix VerticallyeasyArrayTwo PointersMatrix2 companies
- HTML Entity ParsermediumHash TableString2 companies
- K Items With the Maximum SumeasyMathGreedy2 companies
- Maximum Odd Binary NumbereasyMathStringGreedy2 companies
- Maximum Possible Number by Binary ConcatenationmediumArrayBit ManipulationEnumeration2 companies
- Maximum Profit from Trading Stocks with DiscountshardArrayDynamic ProgrammingTreeDepth-First Search2 companies
- Number of Even and Odd BitseasyBit Manipulation2 companies
- Promise Time Limitmedium2 companies
- Two-Letter Card GamemediumArrayHash TableStringCounting+12 companies
- Unique Morse Code WordseasyArrayHash TableString2 companies
- Zigzag Grid Traversal With SkipeasyArrayMatrixSimulation2 companies
- Zuma GamehardStringDynamic ProgrammingStackBreadth-First Search+12 companies
- Balanced K-Factor DecompositionmediumMathBacktrackingNumber Theory2 companies
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.