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
2,011 questions at Amazon · all time
- Employees Earning More Than Their ManagerseasyDatabasefrequency 44.6
- Frequency of the Most Frequent ElementmediumArrayBinary SearchGreedySliding Window+2frequency 44.6
- House Robber IIImediumDynamic ProgrammingTreeDepth-First SearchBinary Tree+1frequency 44.6
- Lowest Common Ancestor of a Binary Tree IIImediumHash TableTwo PointersTreeBinary Tree+2frequency 44.6
- Minimum Path SummediumArrayDynamic ProgrammingMatrixfrequency 44.6
- Minimum Time to Complete All DeliveriesmediumMathBinary Searchfrequency 44.6
- Online Stock SpanmediumStackDesignMonotonic StackData Streamfrequency 44.6
- Rearrange Array Elements by SignmediumArrayTwo PointersSimulationfrequency 44.6
- Reverse PairshardArrayBinary SearchDivide and ConquerBinary Indexed Tree+4frequency 44.6
- Squares of a Sorted ArrayeasyArrayTwo PointersSortingfrequency 44.6
- Cheapest Flights Within K StopsmediumDynamic ProgrammingDepth-First SearchBreadth-First SearchGraph Theory+2frequency 44.1
- Contiguous ArraymediumArrayHash TablePrefix Sumfrequency 44.1
- Divide Two IntegersmediumMathBit Manipulationfrequency 44.1
- Simplify PathmediumStringStackfrequency 44.1
- Target SummediumArrayDynamic ProgrammingBacktrackingKnapsack Problem+1frequency 44.1
- Word Ladder IIhardHash TableStringBacktrackingBreadth-First Search+1frequency 44.1
- Binary SearcheasyArrayBinary Searchfrequency 43.6
- Length of Last WordeasyStringfrequency 43.6
- Linked List Cycle IImediumHash TableLinked ListTwo PointersFloyd's Cycle Finding Algorithmfrequency 43.6
- Minimum Health to Beat GamemediumArrayGreedyfrequency 43.6
- The kth Factor of nmediumMathNumber TheoryPrime Factorizationfrequency 43.6
- Top K Frequent WordsmediumArrayHash TableStringTrie+4frequency 43.6
- Min Cost Climbing StairseasyArrayDynamic Programmingfrequency 43.1
- Non-overlapping IntervalsmediumArrayDynamic ProgrammingGreedySortingfrequency 43.1
- Remove Duplicates from Sorted ListeasyLinked Listfrequency 43.1
- Subsets IImediumArrayBacktrackingBit Manipulationfrequency 43.1
- Average Time of Process per MachineeasyDatabasefrequency 42.5
- Majority Element IImediumArrayHash TableSortingCounting+1frequency 42.5
- Managers with at Least 5 Direct ReportsmediumDatabasefrequency 42.5
- Maximum Average Subarray IeasyArraySliding Windowfrequency 42.5
- Minimum Number of Days to Make m BouquetsmediumArrayBinary Searchfrequency 42.5
- Running Sum of 1d ArrayeasyArrayPrefix Sumfrequency 42.5
- Valid Palindrome IIeasyTwo PointersStringGreedyfrequency 42.5
- Accounts MergemediumArrayHash TableStringDepth-First Search+3frequency 42.0
- Boats to Save PeoplemediumArrayTwo PointersGreedySorting+1frequency 42.0
- Fizz BuzzeasyMathStringSimulationfrequency 42.0
- Power of TwoeasyMathBit ManipulationRecursionfrequency 42.0
- Remove K DigitsmediumStringStackGreedyMonotonic Stackfrequency 42.0
- Add Two IntegerseasyMathfrequency 41.4
- Design Parking SystemeasyDesignSimulationCountingfrequency 41.4
- Invert Binary TreeeasyTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 41.4
- Is SubsequenceeasyTwo PointersStringDynamic Programmingfrequency 41.4
- Open the LockmediumArrayHash TableStringBreadth-First Search+1frequency 41.4
- Partition LabelsmediumHash TableTwo PointersStringGreedyfrequency 41.4
- Rising TemperatureeasyDatabasefrequency 41.4
- Set MismatcheasyArrayHash TableBit ManipulationSortingfrequency 41.4
- Snakes and LaddersmediumArrayBreadth-First SearchMatrixfrequency 41.4
- Sort Characters By FrequencymediumHash TableStringSortingHeap (Priority Queue)+2frequency 41.4
- Binary Tree Inorder TraversaleasyStackTreeDepth-First SearchBinary Treefrequency 40.8
- Count and SaymediumStringfrequency 40.8
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.