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
1,223 questions at Bloomberg · all time
- Shuffle the ArrayeasyArrayfrequency 31.9
- Single Number IImediumArrayBit Manipulationfrequency 31.9
- Subarray Product Less Than KmediumArrayBinary SearchSliding WindowPrefix Sumfrequency 31.9
- Subarrays with K Different IntegershardArrayHash TableSliding WindowCountingfrequency 31.9
- Sum of Two IntegersmediumMathBit Manipulationfrequency 31.9
- Summary RangeseasyArrayfrequency 31.9
- Task SchedulermediumArrayHash TableGreedySorting+2frequency 31.9
- Allocate MailboxeshardArrayMathDynamic ProgrammingSortingfrequency 29.7
- Can Place FlowerseasyArrayGreedyfrequency 29.7
- Cheapest Flights Within K StopsmediumDynamic ProgrammingDepth-First SearchBreadth-First SearchGraph Theory+2frequency 29.7
- Check if All the Integers in a Range Are CoveredeasyArrayHash TablePrefix Sumfrequency 29.7
- Check if the Sentence Is PangrameasyHash TableStringfrequency 29.7
- Complement of Base 10 IntegereasyBit Manipulationfrequency 29.7
- Contain VirushardArrayDepth-First SearchBreadth-First SearchMatrix+1frequency 29.7
- Count of Smaller Numbers After SelfhardArrayBinary SearchDivide and ConquerBinary Indexed Tree+4frequency 29.7
- Customer Who Visited but Did Not Make Any TransactionseasyDatabasefrequency 29.7
- Delete Duplicate EmailseasyDatabasefrequency 29.7
- Elimination GamemediumMathRecursionfrequency 29.7
- Find All Duplicates in an ArraymediumArrayHash TableSortingfrequency 29.7
- Find All Numbers Disappeared in an ArrayeasyArrayHash Tablefrequency 29.7
- Find Numbers with Even Number of DigitseasyArrayMathfrequency 29.7
- Friend Requests II: Who Has the Most FriendsmediumDatabasefrequency 29.7
- Largest Divisible SubsetmediumArrayMathDynamic ProgrammingSortingfrequency 29.7
- Last Person to Fit in the BusmediumDatabasefrequency 29.7
- Max Area of IslandmediumArrayDepth-First SearchBreadth-First SearchUnion-Find+1frequency 29.7
- Maximum Number of Accepted InvitationsmediumArrayDepth-First SearchGraph TheoryMatrix+9frequency 29.7
- Number of Good PairseasyArrayHash TableMathCountingfrequency 29.7
- Number of Students Unable to Eat LuncheasyArrayStackQueueSimulationfrequency 29.7
- Palindrome PermutationeasyHash TableStringBit Manipulationfrequency 29.7
- Path In Zigzag Labelled Binary TreemediumMathTreeBinary Treefrequency 29.7
- Rank ScoresmediumDatabasefrequency 29.7
- Read N Characters Given read4 II - Call Multiple TimeshardArraySimulationInteractivefrequency 29.7
- Redundant ConnectionmediumDepth-First SearchBreadth-First SearchUnion-FindGraph Theoryfrequency 29.7
- Reorganize StringmediumHash TableStringGreedySorting+2frequency 29.7
- Restaurant GrowthmediumDatabasefrequency 29.7
- Serialize and Deserialize N-ary TreehardStringTreeDepth-First SearchBreadth-First Searchfrequency 29.7
- Shortest Distance to Target String in a Circular ArrayeasyArrayStringfrequency 29.7
- Sum of Beauty of All SubstringsmediumHash TableStringCountingfrequency 29.7
- Sum of Square NumbersmediumMathTwo PointersBinary Searchfrequency 29.7
- Text JustificationhardArrayStringSimulationfrequency 29.7
- Third Maximum NumbereasyArraySortingfrequency 29.7
- Truncate SentenceeasyArrayStringfrequency 29.7
- Ugly NumbereasyMathfrequency 29.7
- Valid Palindrome IIeasyTwo PointersStringGreedyfrequency 29.7
- 01 MatrixmediumArrayDynamic ProgrammingBreadth-First SearchMatrixfrequency 27.3
- 132 PatternmediumArrayBinary SearchStackMonotonic Stack+1frequency 27.3
- Best Time to Buy and Sell Stock IIIhardArrayDynamic Programmingfrequency 27.3
- Can Make Arithmetic Progression From SequenceeasyArraySortingfrequency 27.3
- Candy CrushmediumArrayTwo PointersMatrixSimulationfrequency 27.3
- Clone GraphmediumHash TableDepth-First SearchBreadth-First SearchGraph Theoryfrequency 27.3
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.