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
1,223 questions at Bloomberg · all time
- Number of Ways to Assign Edge Weights IIhardArrayMathDynamic ProgrammingBit Manipulation+2frequency 13.4
- Number of ZigZag Arrays IIhardMathDynamic Programmingfrequency 13.4
- Online ElectionmediumArrayHash TableBinary SearchDesignfrequency 13.4
- Pacific Atlantic Water FlowmediumArrayDepth-First SearchBreadth-First SearchMatrixfrequency 13.4
- Painting a Grid With Three Different ColorshardDynamic ProgrammingGraph Coloringfrequency 13.4
- Palindrome Partitioning IIhardStringDynamic Programmingfrequency 13.4
- Parsing A Boolean ExpressionhardStringStackRecursionfrequency 13.4
- Path Existence Queries in a Graph ImediumArrayHash TableBinary SearchUnion-Find+1frequency 13.4
- Path Sum IIImediumTreeDepth-First SearchBinary Treefrequency 13.4
- Percentage of Users Attended a ContesteasyDatabasefrequency 13.4
- Process String with Special Operations ImediumStringSimulationfrequency 13.4
- Product of the Last K NumbersmediumArrayMathDesignData Stream+1frequency 13.4
- Range Product Queries of PowersmediumArrayBit ManipulationPrefix Sumfrequency 13.4
- Range Sum Query - MutablemediumArrayDivide and ConquerDesignBinary Indexed Tree+2frequency 13.4
- Range Sum of BSTeasyTreeDepth-First SearchBinary Search TreeBinary Treefrequency 13.4
- Recover a Tree From Preorder TraversalhardStringTreeDepth-First SearchBinary Treefrequency 13.4
- Relative Sort ArrayeasyArrayHash TableSortingCounting Sort+2frequency 13.4
- Remove Covered IntervalsmediumArraySortingfrequency 13.4
- Remove K-Balanced SubstringsmediumStringStackSimulationfrequency 13.4
- Remove Methods From ProjectmediumDepth-First SearchBreadth-First SearchGraph Theoryfrequency 13.4
- Repeated String MatchmediumStringString MatchingZ AlgorithmKnuth–Morris–Pratt Algorithm+1frequency 13.4
- Reschedule Meetings for Maximum Free Time IImediumArrayGreedyEnumerationfrequency 13.4
- Reshape Data: Melteasyfrequency 13.4
- Reveal Cards In Increasing OrdermediumArrayQueueSortingSimulationfrequency 13.4
- Reverse Nodes in Even Length GroupsmediumLinked Listfrequency 13.4
- Reverse Prefix of WordeasyTwo PointersStringStackfrequency 13.4
- Separate Squares ImediumArrayBinary Searchfrequency 13.4
- Shift 2D GrideasyArrayMatrixSimulationfrequency 13.4
- Shortest Distance from All BuildingshardArrayBreadth-First SearchMatrixfrequency 13.4
- Shortest Path in a Grid with Obstacles EliminationhardArrayBreadth-First SearchMatrixfrequency 13.4
- Shortest Subarray with Sum at Least KhardArrayBinary SearchQueueSliding Window+3frequency 13.4
- Shortest Unsorted Continuous SubarraymediumArrayTwo PointersStackGreedy+2frequency 13.4
- Simple Bank SystemmediumArrayHash TableDesignSimulationfrequency 13.4
- Smallest Divisible Digit Product IeasyMathEnumerationfrequency 13.4
- Smallest Even MultipleeasyMathNumber Theoryfrequency 13.4
- Smallest Missing Integer Greater Than Sequential Prefix SumeasyArrayHash TableSortingfrequency 13.4
- Smallest Subsequence of Distinct CharactersmediumStringStackGreedyMonotonic Stackfrequency 13.4
- Smallest Subtree with all the Deepest NodesmediumHash TableTreeDepth-First SearchBreadth-First Search+4frequency 13.4
- Soup ServingsmediumMathDynamic ProgrammingProbability and Statisticsfrequency 13.4
- Special Array IeasyArrayfrequency 13.4
- Special Binary StringhardStringDivide and ConquerSortingfrequency 13.4
- Spiral Matrix IIImediumArrayMatrixSimulationfrequency 13.4
- Subtract the Product and Sum of Digits of an IntegereasyMathfrequency 13.4
- Sum of Left LeaveseasyTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 13.4
- Sum of Subarray RangesmediumArrayStackMonotonic Stackfrequency 13.4
- Super Egg DrophardMathBinary SearchDynamic Programmingfrequency 13.4
- Swap Sex of EmployeeseasyDatabasefrequency 13.4
- Take K of Each Character From Left and RightmediumHash TableStringSliding Windowfrequency 13.4
- The Skyline ProblemhardArrayDivide and ConquerBinary Indexed TreeSegment Tree+4frequency 13.4
- Three Consecutive OddseasyArrayfrequency 13.4
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.