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
56 questions at Roblox · all time
- Candy CrushmediumArrayTwo PointersMatrixSimulationfrequency 100.0
- Reorganize StringmediumHash TableStringGreedySorting+2frequency 92.2
- Number of Ways to Wear Different Hats to Each OtherhardArrayDynamic ProgrammingBit ManipulationBitmask+3frequency 91.5
- Text JustificationhardArrayStringSimulationfrequency 87.7
- Maximize Distance to Closest PersonmediumArrayfrequency 85.0
- Task SchedulermediumArrayHash TableGreedySorting+2frequency 84.0
- Course Schedule IImediumDepth-First SearchBreadth-First SearchGraph TheoryTopological Sortfrequency 82.9
- Design Hit CountermediumArrayBinary SearchDesignQueue+1frequency 76.7
- Design Search Autocomplete SystemhardStringDepth-First SearchDesignTrie+3frequency 71.8
- Integer to English WordshardMathStringRecursionfrequency 71.8
- Count Number of Nice SubarraysmediumArrayHash TableMathSliding Window+1frequency 67.7
- Group the People Given the Group Size They Belong TomediumArrayHash TableGreedyfrequency 67.7
- Rotate ImagemediumArrayMathMatrixfrequency 67.7
- Convert Binary Number in a Linked List to IntegereasyLinked ListMathfrequency 65.3
- Logger Rate LimitereasyHash TableDesignData Streamfrequency 65.3
- Magnetic Force Between Two BallsmediumArrayBinary SearchSortingfrequency 65.3
- Maximum Number of Occurrences of a SubstringmediumHash TableStringSliding Windowfrequency 65.3
- Minimum Operations to Write the Letter Y on a GridmediumArrayHash TableMatrixCountingfrequency 65.3
- Number of Trusted Contacts of a CustomermediumDatabasefrequency 65.3
- Students and ExaminationseasyDatabasefrequency 65.3
- Subdomain Visit CountmediumArrayHash TableStringCountingfrequency 65.3
- Course SchedulemediumDepth-First SearchBreadth-First SearchGraph TheoryTopological Sort+1frequency 62.6
- Implement Trie (Prefix Tree)mediumHash TableStringDesignTriefrequency 62.6
- Minimum Absolute Difference Between Elements With ConstraintmediumArrayBinary SearchOrdered Setfrequency 62.6
- Number of Black BlocksmediumArrayHash TableEnumerationfrequency 62.6
- Valid ParentheseseasyStringStackBracket Sequencesfrequency 62.6
- Find the Length of the Longest Common PrefixmediumArrayHash TableStringTriefrequency 59.5
- Block Placement QuerieshardArrayBinary SearchBinary Indexed TreeSegment Tree+1frequency 55.8
- Brightest Position on StreetmediumArraySortingPrefix SumOrdered Setfrequency 55.8
- Merge IntervalsmediumArraySortingQuicksortfrequency 55.8
- Number of Adjacent Elements With the Same ColormediumArrayfrequency 55.8
- Rotating the BoxmediumArrayTwo PointersMatrixfrequency 55.8
- Subarrays with K Different IntegershardArrayHash TableSliding WindowCountingfrequency 55.8
- Largest Rectangle in HistogramhardArrayStackMonotonic StackRange Minimum/Maximum Queryfrequency 51.3
- Number of Flowers in Full BloomhardArrayHash TableBinary SearchSorting+2frequency 51.3
- Number of Recent CallseasyDesignQueueData Streamfrequency 51.3
- Spiral MatrixmediumArrayMatrixSimulationfrequency 51.3
- Trapping Rain WaterhardArrayTwo PointersDynamic ProgrammingStack+1frequency 51.3
- Two SumeasyArrayHash Tablefrequency 51.3
- Count the Number of Good SubarraysmediumArrayHash TableSliding Windowfrequency 45.5
- Length of Longest V-Shaped Diagonal SegmenthardArrayDynamic ProgrammingMemoizationMatrixfrequency 45.5
- Longest Common PrefixeasyArrayStringTriefrequency 45.5
- Basic Calculator IVhardHash TableMathStringStack+1frequency 37.4
- Count Nice Pairs in an ArraymediumArrayHash TableMathCountingfrequency 37.4
- Design Browser HistorymediumArrayLinked ListStackDesign+2frequency 37.4
- Design Memory AllocatormediumArrayHash TableDesignSimulationfrequency 37.4
- Employee Free TimehardArraySweep LineSortingHeap (Priority Queue)frequency 37.4
- Image SmoothereasyArrayMatrixfrequency 37.4
- Insert Delete GetRandom O(1)mediumArrayHash TableMathDesign+1frequency 37.4
- Longest Consecutive SequencemediumArrayHash TableUnion-Findfrequency 37.4
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.