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
264 questions at Goldman Sachs · all time
- K-th Symbol in GrammarmediumMathBit ManipulationRecursionfrequency 20.4
- Kth Ancestor of a Tree NodehardBinary SearchDynamic ProgrammingBit ManipulationTree+4frequency 20.4
- Kth Smallest Element in a Sorted MatrixmediumArrayBinary SearchSortingHeap (Priority Queue)+1frequency 20.4
- LFU CachehardHash TableLinked ListDesignDoubly-Linked Listfrequency 20.4
- Largest NumbermediumArrayStringGreedySortingfrequency 20.4
- Length of Longest Fibonacci SubsequencemediumArrayHash TableDynamic Programmingfrequency 20.4
- Lexicographically Smallest String After Substring OperationmediumStringGreedyfrequency 20.4
- Longest Duplicate SubstringhardStringBinary SearchSliding WindowRolling Hash+6frequency 20.4
- Longest Increasing SubsequencemediumArrayBinary SearchDynamic ProgrammingLongest Increasing Subsequencefrequency 20.4
- Longest Substring with At Most K Distinct CharactersmediumHash TableStringSliding Windowfrequency 20.4
- Lowest Common Ancestor of a Binary TreemediumTreeDepth-First SearchBinary TreeBinary Lifting+1frequency 20.4
- Maximum Average Subarray IeasyArraySliding Windowfrequency 20.4
- Maximum Number of Events That Can Be AttendedmediumArrayGreedySortingHeap (Priority Queue)frequency 20.4
- Maximum Sum Circular SubarraymediumArrayDivide and ConquerDynamic ProgrammingQueue+1frequency 20.4
- Meeting Rooms IImediumArrayTwo PointersGreedySorting+2frequency 20.4
- Meeting Rooms IIIhardArrayHash TableSortingHeap (Priority Queue)+1frequency 20.4
- Merge Two Sorted ListseasyLinked ListRecursionfrequency 20.4
- Minimum Cost to Reach City With DiscountsmediumGraph TheoryHeap (Priority Queue)Shortest PathDijkstra's Algorithmfrequency 20.4
- Minimum Insertion Steps to Make a String PalindromehardStringDynamic Programmingfrequency 20.4
- Minimum Swaps to Make Strings EqualmediumMathStringGreedyfrequency 20.4
- Missing NumbereasyArrayHash TableMathBinary Search+2frequency 20.4
- Monotone Increasing DigitsmediumMathGreedyfrequency 20.4
- Next Greater Element IeasyArrayHash TableStackMonotonic Stackfrequency 20.4
- Next Greater Element IImediumArrayStackMonotonic Stackfrequency 20.4
- Non-overlapping IntervalsmediumArrayDynamic ProgrammingGreedySortingfrequency 20.4
- Parallel Courses IIIhardArrayDynamic ProgrammingGraph TheoryTopological Sort+1frequency 20.4
- Parsing A Boolean ExpressionhardStringStackRecursionfrequency 20.4
- Pascal's Triangle IIeasyArrayDynamic Programmingfrequency 20.4
- Perfect SquaresmediumMathDynamic ProgrammingBreadth-First SearchKnapsack Problem+1frequency 20.4
- PermutationsmediumArrayBacktrackingfrequency 20.4
- Permutations IImediumArrayBacktrackingSortingfrequency 20.4
- Power of TwoeasyMathBit ManipulationRecursionfrequency 20.4
- Remove All Occurrences of a SubstringmediumStringStackSimulationfrequency 20.4
- Remove CommentsmediumArrayStringfrequency 20.4
- Remove Duplicates from Sorted ArrayeasyArrayTwo Pointersfrequency 20.4
- Reorder ListmediumLinked ListTwo PointersStackRecursionfrequency 20.4
- Reorganize StringmediumHash TableStringGreedySorting+2frequency 20.4
- Restore IP AddressesmediumStringBacktrackingfrequency 20.4
- Reverse Words in a StringmediumTwo PointersStringfrequency 20.4
- Rotate ImagemediumArrayMathMatrixfrequency 20.4
- Shortest BridgemediumArrayDepth-First SearchBreadth-First SearchMatrixfrequency 20.4
- Shortest Path in Binary MatrixmediumArrayBreadth-First SearchMatrixfrequency 20.4
- Simple Bank SystemmediumArrayHash TableDesignSimulationfrequency 20.4
- Single NumbereasyArrayBit Manipulationfrequency 20.4
- Single-Threaded CPUmediumArraySortingHeap (Priority Queue)frequency 20.4
- Smallest String With SwapsmediumArrayHash TableStringDepth-First Search+3frequency 20.4
- Snapshot ArraymediumArrayHash TableBinary SearchDesign+1frequency 20.4
- Split Array Largest SumhardArrayBinary SearchDynamic ProgrammingGreedy+1frequency 20.4
- Subarray Product Less Than KmediumArrayBinary SearchSliding WindowPrefix Sumfrequency 20.4
- SubsetsmediumArrayBacktrackingBit Manipulationfrequency 20.4
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.