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
136 questions at Nvidia · all time
- Rotate ImagemediumArrayMathMatrixfrequency 52.3
- Serialize and Deserialize Binary TreehardStringTreeDepth-First SearchBreadth-First Search+2frequency 52.3
- Sort ColorsmediumArrayTwo PointersSortingQuicksort+1frequency 52.3
- String CompressionmediumTwo PointersStringfrequency 52.3
- String to Integer (atoi)mediumStringfrequency 52.3
- Subarray Sum Equals KmediumArrayHash TablePrefix Sumfrequency 52.3
- Valid AnagrameasyHash TableStringSortingfrequency 52.3
- Count the Number of Good SubsequencesmediumHash TableMathStringCombinatorics+1frequency 45.9
- Counting BitseasyDynamic ProgrammingBit Manipulationfrequency 45.9
- Course SchedulemediumDepth-First SearchBreadth-First SearchGraph TheoryTopological Sort+1frequency 45.9
- Course Schedule IImediumDepth-First SearchBreadth-First SearchGraph TheoryTopological Sortfrequency 45.9
- Decode StringmediumStringStackRecursionfrequency 45.9
- Design Circular QueuemediumArrayLinked ListDesignQueuefrequency 45.9
- Find Peak ElementmediumArrayBinary Searchfrequency 45.9
- Find the CelebritymediumTwo PointersGraph TheoryInteractivefrequency 45.9
- First Unique Character in a StringeasyHash TableStringQueueCountingfrequency 45.9
- Insert Delete GetRandom O(1)mediumArrayHash TableMathDesign+1frequency 45.9
- Integer to English WordshardMathStringRecursionfrequency 45.9
- Jump GamemediumArrayDynamic ProgrammingGreedyfrequency 45.9
- Kth Largest Element in an ArraymediumArrayDivide and ConquerSortingHeap (Priority Queue)+1frequency 45.9
- Longest Increasing SubsequencemediumArrayBinary SearchDynamic ProgrammingLongest Increasing Subsequencefrequency 45.9
- Max Sum of a Pair With Equal Sum of DigitsmediumArrayHash TableSortingHeap (Priority Queue)frequency 45.9
- Maximal SquaremediumArrayDynamic ProgrammingMatrixfrequency 45.9
- Min StackmediumStackDesignfrequency 45.9
- Minimum Path SummediumArrayDynamic ProgrammingMatrixfrequency 45.9
- Move ZeroeseasyArrayTwo Pointersfrequency 45.9
- Palindrome Linked ListeasyLinked ListTwo PointersStackRecursionfrequency 45.9
- Reverse Linked List IImediumLinked Listfrequency 45.9
- Rotting OrangesmediumArrayBreadth-First SearchMatrixfrequency 45.9
- Set Matrix ZeroesmediumArrayHash TableMatrixfrequency 45.9
- Sliding PuzzlehardArrayDynamic ProgrammingBacktrackingBreadth-First Search+5frequency 45.9
- Spiral MatrixmediumArrayMatrixSimulationfrequency 45.9
- Task Scheduler IImediumArrayHash TableSimulationfrequency 45.9
- Unique PathsmediumMathDynamic ProgrammingCombinatoricsfrequency 45.9
- Add Two Numbers IImediumLinked ListMathStackfrequency 37.0
- All Nodes Distance K in Binary TreemediumHash TableTreeDepth-First SearchBreadth-First Search+1frequency 37.0
- All Possible Full Binary TreesmediumDynamic ProgrammingTreeRecursionMemoization+1frequency 37.0
- Best Time to Buy and Sell Stock IImediumArrayDynamic ProgrammingGreedyfrequency 37.0
- Binary Subarrays With SummediumArrayHash TableSliding WindowPrefix Sumfrequency 37.0
- Clone GraphmediumHash TableDepth-First SearchBreadth-First SearchGraph Theoryfrequency 37.0
- Compare Version NumbersmediumTwo PointersStringfrequency 37.0
- Contains DuplicateeasyArrayHash TableSortingfrequency 37.0
- Count PrimesmediumArrayMathEnumerationNumber Theory+3frequency 37.0
- Daily TemperaturesmediumArrayStackMonotonic Stackfrequency 37.0
- Delete Duplicate Folders in SystemhardArrayHash TableStringDepth-First Search+3frequency 37.0
- Design Memory AllocatormediumArrayHash TableDesignSimulationfrequency 37.0
- Diameter of Binary TreeeasyTreeDepth-First SearchBinary TreeDP on Treesfrequency 37.0
- Find K Closest ElementsmediumArrayTwo PointersBinary SearchSliding Window+2frequency 37.0
- First Missing PositivehardArrayHash Tablefrequency 37.0
- Fizz Buzz MultithreadedmediumConcurrencyfrequency 37.0
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.