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
2,344 questions at Google · all time
- Target SummediumArrayDynamic ProgrammingBacktrackingKnapsack Problem+1frequency 41.0
- Greatest Common Divisor of StringseasyMathStringEuclidean AlgorithmGreatest Common Divisorfrequency 40.6
- Longest Valid ParentheseshardStringDynamic ProgrammingStackBracket Sequencesfrequency 40.6
- Odd Even Linked ListmediumLinked Listfrequency 40.6
- Copy List with Random PointermediumHash TableLinked Listfrequency 40.2
- Delete Nodes And Return ForestmediumArrayHash TableTreeDepth-First Search+1frequency 40.2
- First Bad VersioneasyBinary SearchInteractivefrequency 40.2
- Longest Common SubsequencemediumStringDynamic ProgrammingLongest Common Subsequencefrequency 40.2
- Minimum Number of Days to Make m BouquetsmediumArrayBinary Searchfrequency 40.2
- Reverse Linked List IImediumLinked Listfrequency 40.2
- Swap Adjacent in LR StringmediumTwo PointersStringfrequency 40.2
- Can Place FlowerseasyArrayGreedyfrequency 39.8
- Frequency of the Most Frequent ElementmediumArrayBinary SearchGreedySliding Window+2frequency 39.8
- Rotate StringeasyStringString Matchingfrequency 39.8
- Single Number IImediumArrayBit Manipulationfrequency 39.8
- Binary Tree Zigzag Level Order TraversalmediumTreeBreadth-First SearchBinary Treefrequency 39.5
- Can Make Arithmetic Progression From SequenceeasyArraySortingfrequency 39.5
- Clone GraphmediumHash TableDepth-First SearchBreadth-First SearchGraph Theoryfrequency 39.5
- Finding MK AveragehardDesignQueueHeap (Priority Queue)Data Stream+2frequency 39.5
- Intersection of Two Linked ListseasyHash TableLinked ListTwo Pointersfrequency 39.5
- Largest Divisible SubsetmediumArrayMathDynamic ProgrammingSortingfrequency 39.5
- Maximum Depth of Binary TreeeasyTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 39.5
- Task SchedulermediumArrayHash TableGreedySorting+2frequency 39.5
- 24 GamehardArrayMathBacktrackingfrequency 39.0
- Fizz BuzzeasyMathStringSimulationfrequency 39.0
- Is SubsequenceeasyTwo PointersStringDynamic Programmingfrequency 39.0
- Maximum Width RampmediumArrayTwo PointersStackMonotonic Stackfrequency 39.0
- Reorder ListmediumLinked ListTwo PointersStackRecursionfrequency 39.0
- Zero Array Transformation IImediumArrayTwo PointersBinary SearchPrefix Sumfrequency 39.0
- Count Good NumbersmediumMathRecursionfrequency 38.6
- Find Minimum in Rotated Sorted ArraymediumArrayBinary Searchfrequency 38.6
- Gas StationmediumArrayGreedyfrequency 38.6
- Summary RangeseasyArrayfrequency 38.6
- Swim in Rising WaterhardArrayBinary SearchDepth-First SearchBreadth-First Search+5frequency 38.6
- Add StringseasyMathStringSimulationfrequency 38.2
- Find Missing and Repeated ValueseasyArrayHash TableMathMatrixfrequency 38.2
- Implement Stack using QueueseasyStackDesignQueuefrequency 38.2
- Perfect SquaresmediumMathDynamic ProgrammingBreadth-First SearchKnapsack Problem+1frequency 38.2
- Ransom NoteeasyHash TableStringCountingfrequency 38.2
- Search in Rotated Sorted Array IImediumArrayBinary Searchfrequency 38.2
- Shortest PalindromehardStringRolling HashString MatchingHash Function+3frequency 38.2
- Valid Palindrome IIeasyTwo PointersStringGreedyfrequency 38.2
- Asteroid CollisionmediumArrayStackSimulationfrequency 37.8
- Coin Change IImediumArrayDynamic ProgrammingKnapsack ProblemComplete Knapsackfrequency 37.8
- Evaluate Reverse Polish NotationmediumArrayMathStackfrequency 37.8
- Find All Duplicates in an ArraymediumArrayHash TableSortingfrequency 37.8
- Find K Closest ElementsmediumArrayTwo PointersBinary SearchSliding Window+2frequency 37.8
- Serialize and Deserialize Binary TreehardStringTreeDepth-First SearchBreadth-First Search+2frequency 37.8
- Average Time of Process per MachineeasyDatabasefrequency 37.3
- Cheapest Flights Within K StopsmediumDynamic ProgrammingDepth-First SearchBreadth-First SearchGraph Theory+2frequency 37.3
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.