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
3,110 questions · all time
- Final Array State After K Multiplication Operations IeasyArrayMathHeap (Priority Queue)Simulation3 companies
- Maximum Count of Positive Integer and Negative IntegereasyArrayBinary SearchCounting3 companies
- Minimum Moves to Equal Array Elements IImediumArrayMathSorting3 companies
- Select Dataeasy3 companies
- Shortest Distance After Road Addition Queries ImediumArrayBreadth-First SearchGraph Theory3 companies
- Smallest Number With All Set BitseasyMathBit Manipulation3 companies
- Sorting the SentenceeasyStringSortingBubble Sort3 companies
- Maximum Tastiness of Candy BasketmediumArrayBinary SearchGreedySorting3 companies
- Minimum Cost of Buying Candies With DiscounteasyArrayGreedySorting3 companies
- Minimum Pair Removal to Sort Array IIhardArrayHash TableLinked ListHeap (Priority Queue)+33 companies
- Sum of Absolute Differences in a Sorted ArraymediumArrayMathPrefix Sum3 companies
- Check If All 1's Are at Least Length K Places AwayeasyArray3 companies
- Extra Characters in a StringmediumArrayHash TableStringDynamic Programming+13 companies
- Find a Safe Walk Through a GridmediumArrayBreadth-First SearchGraph TheoryHeap (Priority Queue)+23 companies
- Get the Maximum ScorehardArrayTwo PointersDynamic ProgrammingGreedy3 companies
- Maximum Number of Operations to Move Ones to the EndmediumStringGreedyCounting3 companies
- Minimum Recolors to Get K Consecutive Black BlockseasyStringSliding Window3 companies
- Satisfiability of Equality EquationsmediumArrayStringUnion-FindGraph Theory3 companies
- Find Most Frequent Vowel and ConsonanteasyHash TableStringCounting3 companies
- To Lower CaseeasyString3 companies
- Count of Substrings Containing Every Vowel and K Consonants IImediumHash TableStringSliding Window3 companies
- Find the K-th Character in String Game IIhardMathBit ManipulationRecursion3 companies
- Find the Middle Index in ArrayeasyArrayPrefix Sum3 companies
- Find the Number of Distinct Colors Among the BallsmediumArrayHash TableSimulation3 companies
- Market Analysis ImediumDatabase3 companies
- Minimum Index Sum of Two ListseasyArrayHash TableString3 companies
- Minimum Operations to Make Array Elements ZerohardArrayMathBit Manipulation3 companies
- Minimum Operations to Make Array Values Equal to KeasyArrayHash Table3 companies
- N-ary Tree Postorder TraversaleasyStackTreeDepth-First Search3 companies
- Number of Paths with Max ScorehardArrayDynamic ProgrammingMatrix3 companies
- Number of Ways to Assign Edge Weights IIhardArrayMathDynamic ProgrammingBit Manipulation+23 companies
- Number of ZigZag Arrays IIhardMathDynamic Programming3 companies
- Remove Methods From ProjectmediumDepth-First SearchBreadth-First SearchGraph Theory3 companies
- Reverse Nodes in Even Length GroupsmediumLinked List3 companies
- Take K of Each Character From Left and RightmediumHash TableStringSliding Window3 companies
- Find Closest Node to Given Two NodesmediumDepth-First SearchGraph Theory3 companies
- Maximize Area of Square Hole in GridmediumArraySorting3 companies
- Maximum Height by Stacking CuboidshardArrayDynamic ProgrammingSorting3 companies
- Minimum Cost Path with TeleportationshardArrayDynamic ProgrammingMatrix3 companies
- Count the Number of Ideal ArrayshardMathDynamic ProgrammingCombinatoricsNumber Theory+23 companies
- Group Sold Products By The DateeasyDatabase3 companies
- Maximum Fruits Harvested After at Most K StepshardArrayBinary SearchSliding WindowPrefix Sum3 companies
- Painting the WallshardArrayDynamic Programming3 companies
- Find if Array Can Be SortedmediumArrayBit ManipulationSorting3 companies
- Maximum Number of Words You Can TypeeasyHash TableString3 companies
- Merge BSTs to Create Single BSThardArrayHash TableTreeDepth-First Search+23 companies
- Minimum Cost to Make Array EqualhardArrayBinary SearchGreedySorting+13 companies
- Minimum Element After Replacement With Digit SumeasyArrayMath3 companies
- Minimum Operations to Equalize Binary StringhardMathStringBreadth-First SearchUnion-Find+13 companies
- N-ary Tree Level Order TraversalmediumTreeBreadth-First Search3 companies
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.