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.
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1 problem asked at Airbnb — full prompts you can work right here.
Asked on LeetCode
63 questions at Airbnb · all time
- Text JustificationhardArrayStringSimulationfrequency 100.0
- Maximum Profit in Job SchedulinghardArrayBinary SearchDynamic ProgrammingSortingfrequency 93.0
- Flatten 2D VectormediumArrayTwo PointersDesignIteratorfrequency 85.6
- Maximum Candies You Can Get from BoxeshardArrayBreadth-First SearchGraph Theoryfrequency 82.4
- Smallest Common RegionmediumArrayHash TableStringTree+4frequency 82.4
- Design Excel Sum FormulahardArrayHash TableStringGraph Theory+3frequency 78.6
- Palindrome PairshardArrayHash TableStringTrie+1frequency 78.6
- Pour WatermediumArraySimulationfrequency 77.1
- Sliding PuzzlehardArrayDynamic ProgrammingBacktrackingBreadth-First Search+5frequency 75.6
- Intersection of Two Linked ListseasyHash TableLinked ListTwo Pointersfrequency 73.9
- Alien DictionaryhardArrayStringDepth-First SearchBreadth-First Search+3frequency 72.1
- Simple Bank SystemmediumArrayHash TableDesignSimulationfrequency 72.1
- Contains Duplicate IIeasyArrayHash TableSliding Windowfrequency 70.1
- Trapping Rain WaterhardArrayTwo PointersDynamic ProgrammingStack+1frequency 70.1
- Add Two NumbersmediumLinked ListMathRecursionfrequency 67.9
- Employee Free TimehardArraySweep LineSortingHeap (Priority Queue)frequency 67.9
- IP to CIDRmediumStringBit Manipulationfrequency 67.9
- Shortest Uncommon Substring in an ArraymediumArrayHash TableStringTriefrequency 67.9
- Word Search IIhardArrayStringBacktrackingTrie+1frequency 67.9
- Add StringseasyMathStringSimulationfrequency 65.5
- Basic Calculator IImediumMathStringStackfrequency 65.5
- Cheapest Flights Within K StopsmediumDynamic ProgrammingDepth-First SearchBreadth-First SearchGraph Theory+2frequency 65.5
- Contains DuplicateeasyArrayHash TableSortingfrequency 65.5
- Contains Duplicate IIIhardArraySliding WindowSortingBucket Sort+1frequency 65.5
- Convert Sorted Array to Binary Search TreeeasyArrayDivide and ConquerTreeBinary Search Tree+1frequency 65.5
- Convert to Base -2mediumMathfrequency 65.5
- Design File SystemmediumHash TableStringDesignTriefrequency 65.5
- Happy NumbereasyHash TableMathTwo PointersFloyd's Cycle Finding Algorithmfrequency 65.5
- House RobbermediumArrayDynamic Programmingfrequency 65.5
- Maximal SquaremediumArrayDynamic ProgrammingMatrixfrequency 65.5
- Merge k Sorted ListshardLinked ListDivide and ConquerHeap (Priority Queue)Merge Sort+1frequency 65.5
- Mini ParsermediumStringStackDepth-First Searchfrequency 65.5
- Minimize Rounding Error to Meet TargetmediumArrayMathStringGreedy+1frequency 65.5
- Minimum Number of Flips to Convert Binary Matrix to Zero MatrixhardArrayHash TableBit ManipulationBreadth-First Search+1frequency 65.5
- Minimum Number of Vertices to Reach All NodesmediumGraph TheoryDirected Acyclic Graphfrequency 65.5
- Number of Ways to Build House of CardsmediumMathDynamic Programmingfrequency 65.5
- Pyramid Transition MatrixmediumHash TableStringBacktrackingBit Manipulationfrequency 65.5
- Regular Expression MatchinghardStringDynamic ProgrammingRecursionfrequency 65.5
- Reverse BitseasyDivide and ConquerBit Manipulationfrequency 65.5
- Robot Bounded In CirclemediumMathStringSimulationfrequency 65.5
- Shopping OffersmediumArrayDynamic ProgrammingBacktrackingBit Manipulation+4frequency 65.5
- Single NumbereasyArrayBit Manipulationfrequency 65.5
- Strings Differ by One CharactermediumHash TableStringRolling HashHash Functionfrequency 65.5
- Two SumeasyArrayHash Tablefrequency 65.5
- Valid ParentheseseasyStringStackBracket Sequencesfrequency 65.5
- Minimum Window SubstringhardHash TableStringSliding Windowfrequency 62.7
- Combination SummediumArrayBacktrackingfrequency 59.5
- Accounts MergemediumArrayHash TableStringDepth-First Search+3frequency 55.7
- Subarray Product Less Than KmediumArrayBinary SearchSliding WindowPrefix Sumfrequency 55.7
- Design Tic-Tac-ToemediumArrayHash TableDesignMatrix+1frequency 45.2
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.