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
- Minimum Operations to Make the Integer ZeromediumBit ManipulationBrainteaserEnumerationfrequency 17.7
- Minimum Pair Removal to Sort Array IeasyArrayHash TableLinked ListHeap (Priority Queue)+3frequency 17.7
- Minimum Score of a Path Between Two CitiesmediumDepth-First SearchBreadth-First SearchUnion-FindGraph Theoryfrequency 17.7
- Minimum Swaps to Arrange a Binary GridmediumArrayGreedyMatrixfrequency 17.7
- Minimum Total Distance TraveledhardArrayDynamic ProgrammingSortingfrequency 17.7
- N-th Tribonacci NumbereasyMathDynamic ProgrammingMemoizationfrequency 17.7
- Number of Matching SubsequencesmediumArrayHash TableStringBinary Search+3frequency 17.7
- Number of Operations to Make Network ConnectedmediumDepth-First SearchBreadth-First SearchUnion-FindGraph Theoryfrequency 17.7
- Number of Ways to Arrive at DestinationmediumDynamic ProgrammingGraph TheoryTopological SortShortest Path+1frequency 17.7
- Number of Ways to Paint N × 3 GridhardDynamic ProgrammingGraph Coloringfrequency 17.7
- Ones and ZeroesmediumArrayStringDynamic ProgrammingKnapsack Problem+1frequency 17.7
- Open the LockmediumArrayHash TableStringBreadth-First Search+1frequency 17.7
- Partition LabelsmediumHash TableTwo PointersStringGreedyfrequency 17.7
- Pascal's Triangle IIeasyArrayDynamic Programmingfrequency 17.7
- Power of FoureasyMathBit ManipulationRecursionfrequency 17.7
- Predict the WinnermediumArrayMathDynamic ProgrammingRecursion+3frequency 17.7
- Product Sales Analysis IeasyDatabasefrequency 17.7
- Project Employees IeasyDatabasefrequency 17.7
- Push DominoesmediumTwo PointersStringDynamic Programmingfrequency 17.7
- Random Pick with WeightmediumArrayMathBinary SearchPrefix Sum+1frequency 17.7
- Range Sum Query 2D - ImmutablemediumArrayDesignMatrixPrefix Sumfrequency 17.7
- Remove Zero Sum Consecutive Nodes from Linked ListmediumHash TableLinked Listfrequency 17.7
- Restore IP AddressesmediumStringBacktrackingfrequency 17.7
- Return Length of Arguments Passedeasyfrequency 17.7
- Reverse BitseasyDivide and ConquerBit Manipulationfrequency 17.7
- Richest Customer WealtheasyArrayMatrixfrequency 17.7
- Row With Maximum OneseasyArrayMatrixfrequency 17.7
- Sales PersoneasyDatabasefrequency 17.7
- Search Suggestions SystemmediumArrayStringBinary SearchTrie+2frequency 17.7
- Search in a Binary Search TreeeasyTreeBinary Search TreeBinary Treefrequency 17.7
- Sequential DigitsmediumEnumerationfrequency 17.7
- Shortest Distance to a CharactereasyArrayTwo PointersStringfrequency 17.7
- Smallest Palindromic Rearrangement ImediumStringSortingCounting Sortfrequency 17.7
- Smallest Subarrays With Maximum Bitwise ORmediumArrayBinary SearchBit ManipulationSliding Windowfrequency 17.7
- Special Array With X Elements Greater Than or Equal XeasyArrayBinary SearchSortingfrequency 17.7
- Stone Game IVhardMathDynamic ProgrammingMinimaxGame Theory+3frequency 17.7
- Strange PrinterhardStringDynamic Programmingfrequency 17.7
- String Matching in an ArrayeasyArrayStringString Matchingfrequency 17.7
- Successful Pairs of Spells and PotionsmediumArrayTwo PointersBinary SearchSortingfrequency 17.7
- Sum of Mutated Array Closest to TargetmediumArrayBinary SearchSortingfrequency 17.7
- Taking Maximum Energy From the Mystic DungeonmediumArrayDynamic ProgrammingPrefix Sumfrequency 17.7
- To Be Or Not To Beeasyfrequency 17.7
- Total Waviness of Numbers in Range IIhardMathDynamic Programmingfrequency 17.7
- Trapping Rain Water IIhardArrayBreadth-First SearchHeap (Priority Queue)Matrixfrequency 17.7
- Tuple with Same ProductmediumArrayHash TableCountingfrequency 17.7
- Vowel SpellcheckermediumArrayHash TableStringfrequency 17.7
- Word Search IIhardArrayStringBacktrackingTrie+1frequency 17.7
- Zero Array Transformation IImediumArrayTwo PointersBinary SearchPrefix Sumfrequency 17.7
- Zero Array Transformation IIImediumArrayTwo PointersGreedySorting+2frequency 17.7
- 2 Keys KeyboardmediumMathDynamic Programmingfrequency 13.4
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.