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
359 questions at Uber · all time
- Add DigitseasyMathSimulationNumber Theoryfrequency 33.5
- Cheapest Flights Within K StopsmediumDynamic ProgrammingDepth-First SearchBreadth-First SearchGraph Theory+2frequency 33.5
- Count Nice Pairs in an ArraymediumArrayHash TableMathCountingfrequency 33.5
- Detonate the Maximum BombsmediumArrayMathDepth-First SearchBreadth-First Search+2frequency 33.5
- Exam RoommediumDesignHeap (Priority Queue)Ordered Setfrequency 33.5
- Find Critical and Pseudo-Critical Edges in Minimum Spanning TreehardUnion-FindGraph TheorySortingMinimum Spanning Tree+4frequency 33.5
- Is Graph Bipartite?mediumDepth-First SearchBreadth-First SearchUnion-FindGraph Theory+2frequency 33.5
- Longest Common PrefixeasyArrayStringTriefrequency 33.5
- Longest Increasing Path in a MatrixhardArrayDynamic ProgrammingDepth-First SearchBreadth-First Search+5frequency 33.5
- Longest Valid ParentheseshardStringDynamic ProgrammingStackBracket Sequencesfrequency 33.5
- Maximum Earnings From TaximediumArrayHash TableBinary SearchDynamic Programming+1frequency 33.5
- Maximum Number of AlloysmediumArrayBinary Searchfrequency 33.5
- Maximum Number of Events That Can Be AttendedmediumArrayGreedySortingHeap (Priority Queue)frequency 33.5
- Maximum Profit in Job SchedulinghardArrayBinary SearchDynamic ProgrammingSortingfrequency 33.5
- Maximum SubarraymediumArrayDivide and ConquerDynamic Programmingfrequency 33.5
- Minimum Path SummediumArrayDynamic ProgrammingMatrixfrequency 33.5
- Next PermutationmediumArrayTwo Pointersfrequency 33.5
- PermutationsmediumArrayBacktrackingfrequency 33.5
- Replace Non-Coprime Numbers in ArrayhardArrayMathStackNumber Theory+2frequency 33.5
- Rotated DigitsmediumMathDynamic Programmingfrequency 33.5
- Shortest PalindromehardStringRolling HashString MatchingHash Function+3frequency 33.5
- Shortest Path to Get All KeyshardArrayBit ManipulationBreadth-First SearchMatrixfrequency 33.5
- Simplify PathmediumStringStackfrequency 33.5
- Sliding PuzzlehardArrayDynamic ProgrammingBacktrackingBreadth-First Search+5frequency 33.5
- Subarray Sum Equals KmediumArrayHash TablePrefix Sumfrequency 33.5
- Subarrays with K Different IntegershardArrayHash TableSliding WindowCountingfrequency 33.5
- Water and Jug ProblemmediumMathDepth-First SearchBreadth-First SearchBézout's Lemma+3frequency 33.5
- Word Ladder IIhardHash TableStringBacktrackingBreadth-First Search+1frequency 33.5
- Accounts MergemediumArrayHash TableStringDepth-First Search+3frequency 27.8
- Add StringseasyMathStringSimulationfrequency 27.8
- Analyze User Website Visit PatternmediumArrayHash TableStringSortingfrequency 27.8
- Binary Searchable Numbers in an Unsorted ArraymediumArrayBinary SearchStackMonotonic Stackfrequency 27.8
- Capacity To Ship Packages Within D DaysmediumArrayBinary Searchfrequency 27.8
- Count PrimesmediumArrayMathEnumerationNumber Theory+3frequency 27.8
- Count the Number of Infection SequenceshardArrayMathCombinatoricsFermat's Little Theoremfrequency 27.8
- Design A LeaderboardmediumHash TableDesignSortingfrequency 27.8
- Design Browser HistorymediumArrayLinked ListStackDesign+2frequency 27.8
- Design File SystemmediumHash TableStringDesignTriefrequency 27.8
- Design Search Autocomplete SystemhardStringDepth-First SearchDesignTrie+3frequency 27.8
- Design a Text EditorhardLinked ListStringStackDesign+2frequency 27.8
- Find Eventual Safe StatesmediumDepth-First SearchBreadth-First SearchGraph TheoryTopological Sort+2frequency 27.8
- Find Minimum in Rotated Sorted ArraymediumArrayBinary Searchfrequency 27.8
- Find the Length of the Longest Common PrefixmediumArrayHash TableStringTriefrequency 27.8
- Frequency of the Most Frequent ElementmediumArrayBinary SearchGreedySliding Window+2frequency 27.8
- Furthest Building You Can ReachmediumArrayGreedyHeap (Priority Queue)frequency 27.8
- Graph Connectivity With ThresholdhardArrayMathUnion-FindNumber Theoryfrequency 27.8
- IPOhardArrayGreedySortingHeap (Priority Queue)frequency 27.8
- Largest 1-Bordered SquaremediumArrayDynamic ProgrammingMatrixfrequency 27.8
- Maximize Sum of Weights after Edge RemovalshardDynamic ProgrammingTreeDepth-First SearchSortingfrequency 27.8
- Maximum Frequency StackhardHash TableStackDesignOrdered Setfrequency 27.8
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.