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
- Time Needed to Buy TicketseasyArrayQueueSimulationfrequency 13.4
- Total Cost to Hire K WorkersmediumArrayTwo PointersHeap (Priority Queue)Simulationfrequency 13.4
- Two Furthest Houses With Different ColorseasyArrayGreedyfrequency 13.4
- Unique Binary Search TreesmediumMathDynamic ProgrammingTreeBinary Search Tree+1frequency 13.4
- Unique Paths IIIhardArrayBacktrackingBit ManipulationMatrix+1frequency 13.4
- Valid Mountain ArrayeasyArrayfrequency 13.4
- Verifying an Alien DictionaryeasyArrayHash TableStringfrequency 13.4
- Walls and GatesmediumArrayBreadth-First SearchMatrixfrequency 13.4
- Wiggle Sort IImediumArrayDivide and ConquerGreedySorting+1frequency 13.4
- Words Within Two Edits of DictionarymediumArrayStringTriefrequency 13.4
- 1-bit and 2-bit CharacterseasyArrayfrequency 8.2
- A Number After a Double ReversaleasyMathfrequency 8.2
- Actors and Directors Who Cooperated At Least Three TimeseasyDatabasefrequency 8.2
- Add One Row to TreemediumTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 8.2
- Add Two Promiseseasyfrequency 8.2
- Adding Spaces to a StringmediumArrayTwo PointersStringSimulationfrequency 8.2
- Adjacent Increasing Subarrays Detection IeasyArrayfrequency 8.2
- Alice and Bob Playing Flower GamemediumMathfrequency 8.2
- Analyze Subscription ConversionmediumDatabasefrequency 8.2
- Apple Redistribution into BoxeseasyArrayGreedySortingfrequency 8.2
- Arithmetic Slices II - SubsequencehardArrayDynamic Programmingfrequency 8.2
- Base 7easyMathStringfrequency 8.2
- Beautiful ArrangementmediumArrayDynamic ProgrammingBacktrackingBit Manipulation+1frequency 8.2
- Beautiful Arrangement IImediumArrayMathfrequency 8.2
- Binary GapeasyBit Manipulationfrequency 8.2
- Bitwise AND of Numbers RangemediumBit Manipulationfrequency 8.2
- Broken CalculatormediumMathGreedyfrequency 8.2
- Build an Array With Stack OperationsmediumArrayStackSimulationfrequency 8.2
- Bulb SwitchermediumMathBrainteaserfrequency 8.2
- Calculator with Method Chainingeasyfrequency 8.2
- Check Digitorial PermutationmediumMathCountingfrequency 8.2
- Check If All 1's Are at Least Length K Places AwayeasyArrayfrequency 8.2
- Check If Array Pairs Are Divisible by kmediumArrayHash TableCountingfrequency 8.2
- Check if All A's Appears Before All B'seasyStringfrequency 8.2
- Check if Array is GoodeasyArrayHash TableSortingfrequency 8.2
- Check if Two Chessboard Squares Have the Same ColoreasyMathStringfrequency 8.2
- Choose K Elements With Maximum SummediumArraySortingHeap (Priority Queue)frequency 8.2
- Cinema Seat AllocationmediumArrayHash TableGreedyBit Manipulationfrequency 8.2
- Circular Array LoopmediumArrayHash TableTwo PointersFloyd's Cycle Finding Algorithmfrequency 8.2
- Classes With at Least 5 StudentseasyDatabasefrequency 8.2
- Closest Binary Search Tree ValueeasyBinary SearchTreeDepth-First SearchBinary Search Tree+1frequency 8.2
- Clumsy FactorialmediumMathStackSimulationfrequency 8.2
- Concatenate Non-Zero Digits and Multiply by Sum IImediumMathStringPrefix Sumfrequency 8.2
- Construct K Palindrome StringsmediumHash TableStringGreedyCountingfrequency 8.2
- Construct Product MatrixmediumArrayMatrixPrefix Sumfrequency 8.2
- Construct the Lexicographically Largest Valid SequencemediumArrayBacktrackingfrequency 8.2
- Construct the Minimum Bitwise Array IeasyArrayBit Manipulationfrequency 8.2
- Convert Binary Number in a Linked List to IntegereasyLinked ListMathfrequency 8.2
- Count Equal and Divisible Pairs in an ArrayeasyArrayfrequency 8.2
- Count Good Triplets in an ArrayhardArrayBinary SearchDivide and ConquerBinary Indexed Tree+3frequency 8.2
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.