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
175 questions at LinkedIn · all time
- Kth Smallest Product of Two Sorted ArrayshardArrayBinary Searchfrequency 55.0
- Maximize Subarrays After Removing One Conflicting PairhardArraySegment TreeEnumerationPrefix Sumfrequency 55.0
- Can I WinmediumMathDynamic ProgrammingBit ManipulationMemoization+2frequency 53.7
- Valid Perfect SquareeasyMathBinary Searchfrequency 53.7
- Find K Pairs with Smallest SumsmediumArrayHeap (Priority Queue)frequency 52.2
- Robot Room CleanerhardBacktrackingInteractivefrequency 52.2
- Evaluate Reverse Polish NotationmediumArrayMathStackfrequency 50.6
- Flatten Nested List IteratormediumStackTreeDepth-First SearchDesign+2frequency 50.6
- Lowest Common Ancestor of a Binary Tree IImediumTreeDepth-First SearchBinary TreeBinary Lifting+1frequency 50.6
- Merge Two Sorted ListseasyLinked ListRecursionfrequency 50.6
- Shortest Word Distance IIImediumArrayStringfrequency 50.6
- Two SumeasyArrayHash Tablefrequency 50.6
- Binary Tree Level Order TraversalmediumTreeBreadth-First SearchBinary Treefrequency 48.8
- Building H2OmediumConcurrencyfrequency 48.8
- Insert IntervalmediumArrayfrequency 48.8
- Merge Two Binary TreeseasyTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 48.8
- Merge k Sorted ListshardLinked ListDivide and ConquerHeap (Priority Queue)Merge Sort+1frequency 48.8
- Possible BipartitionmediumDepth-First SearchBreadth-First SearchUnion-FindGraph Theory+2frequency 48.8
- Sparse Matrix MultiplicationmediumArrayHash TableMatrixLinear Algebrafrequency 48.8
- Accounts MergemediumArrayHash TableStringDepth-First Search+3frequency 46.9
- Binary Tree Zigzag Level Order TraversalmediumTreeBreadth-First SearchBinary Treefrequency 46.9
- Course Schedule IImediumDepth-First SearchBreadth-First SearchGraph TheoryTopological Sortfrequency 46.9
- Edit DistancemediumStringDynamic Programmingfrequency 46.9
- House RobbermediumArrayDynamic Programmingfrequency 46.9
- Intersection of Two Linked ListseasyHash TableLinked ListTwo Pointersfrequency 46.9
- Palindromic SubstringsmediumTwo PointersStringDynamic Programmingfrequency 46.9
- Permutations IImediumArrayBacktrackingSortingfrequency 46.9
- Product of Array Except SelfmediumArrayPrefix Sumfrequency 46.9
- Text JustificationhardArrayStringSimulationfrequency 46.9
- Article Views IeasyDatabasefrequency 44.7
- Article Views IImediumDatabasefrequency 44.7
- Binary Search Tree IteratormediumStackTreeDesignBinary Search Tree+2frequency 44.7
- Count Different Palindromic SubsequenceshardStringDynamic Programmingfrequency 44.7
- Count Sequences to KhardArrayMathDynamic ProgrammingMemoization+1frequency 44.7
- Create Binary Tree From DescriptionsmediumArrayHash TableTreeBinary Treefrequency 44.7
- Find K Closest ElementsmediumArrayTwo PointersBinary SearchSliding Window+2frequency 44.7
- Find Largest Value in Each Tree RowmediumTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 44.7
- Graph Valid TreemediumDepth-First SearchBreadth-First SearchUnion-FindGraph Theoryfrequency 44.7
- Maximize Total Tastiness of Purchased FruitsmediumArrayDynamic Programmingfrequency 44.7
- Maximum Number of Non-overlapping Palindrome SubstringshardTwo PointersStringDynamic ProgrammingGreedyfrequency 44.7
- Minimum Deletions to Make Array DivisiblehardArrayMathSortingHeap (Priority Queue)+3frequency 44.7
- Minimum Increase to Maximize Special IndicesmediumArrayDynamic ProgrammingGreedyPrefix Sumfrequency 44.7
- New Users Daily CountmediumDatabasefrequency 44.7
- Number of Sub-arrays of Size K and Average Greater than or Equal to ThresholdmediumArraySliding Windowfrequency 44.7
- Rotate ListmediumLinked ListTwo Pointersfrequency 44.7
- Sqrt(x)easyMathBinary SearchNewton's Methodfrequency 44.7
- Sum of All Odd Length SubarrayseasyArrayMathPrefix Sumfrequency 44.7
- Sum of Square NumbersmediumMathTwo PointersBinary Searchfrequency 44.7
- Time to Cross a BridgehardArrayHeap (Priority Queue)Simulationfrequency 44.7
- Two Sum III - Data structure designeasyArrayHash TableTwo PointersDesign+1frequency 44.7
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.