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
- Find the Winning Player in Coin GameeasyMathSimulationGame Theory1 company
- Flower Planting With No AdjacentmediumDepth-First SearchBreadth-First SearchGraph TheoryGraph Coloring1 company
- Generate Tag for Video CaptioneasyStringSimulation1 company
- Maximum Number of Integers to Choose From a Range ImediumArrayHash TableBinary SearchGreedy+11 company
- Maximum Sum of Edge Values in a GraphhardMathGreedyGraph Theory1 company
- Minimum Moves to Balance Circular ArraymediumArrayGreedySorting1 company
- Minimum Moves to Clean the ClassroommediumArrayHash TableBit ManipulationBreadth-First Search+11 company
- Minimum Moves to Reach Target in GridhardMath1 company
- Naming a CompanyhardArrayHash TableStringBit Manipulation+11 company
- Self CrossinghardArrayMathGeometry1 company
- Closest Subsequence SumhardArrayTwo PointersDynamic ProgrammingBit Manipulation+31 company
- Constrained Subsequence SumhardArrayDynamic ProgrammingQueueSliding Window+21 company
- Count Submatrices with Top-Left Element and Sum Less Than kmediumArrayMatrixPrefix Sum1 company
- Find Indices of Stable MountainseasyArray1 company
- Find Nth Smallest Integer With K One BitshardMathBit ManipulationCombinatorics1 company
- Find Weighted Median Node in TreehardArrayBinary SearchDynamic ProgrammingBit Manipulation+21 company
- Find the String with LCPhardArrayStringDynamic ProgrammingGreedy+21 company
- Find the Student that Will Replace the ChalkmediumArrayBinary SearchSimulationPrefix Sum1 company
- Make Array Non-decreasingmediumArrayStackGreedyMonotonic Stack1 company
- Maximize the Number of Target Nodes After Connecting Trees IIhardTreeDepth-First SearchBreadth-First Search1 company
- Maximum Subarray With Equal ProductseasyArrayMathSliding WindowEnumeration+11 company
- Minimum Swaps to Sort by Digit SummediumArrayHash TableSorting1 company
- Rectangle Area IIhardArraySegment TreeSweep LineOrdered Set1 company
- Subsequence Sum After Capping ElementsmediumArrayTwo PointersDynamic ProgrammingSorting1 company
- The Latest Login in 2020easyDatabase1 company
- Total Characters in String After Transformations IIhardHash TableMathStringDynamic Programming+11 company
- Concatenated DivisibilityhardArrayDynamic ProgrammingBit ManipulationBitmask1 company
- Number of Valid Words in a SentenceeasyString1 company
- Resulting String After Adjacent RemovalsmediumStringStackSimulation1 company
- Construct the Longest New StringmediumMathDynamic ProgrammingGreedyBrainteaser1 company
- Count Routes to Climb a Rectangular GridhardArrayDynamic ProgrammingMatrixPrefix Sum1 company
- Distance to a Cycle in Undirected GraphhardDepth-First SearchBreadth-First SearchGraph TheoryTopological Sort1 company
- Find the Count of Numbers Which Are Not SpecialmediumArrayMathNumber Theory1 company
- Find the Longest Equal SubarraymediumArrayHash TableBinary SearchSliding Window1 company
- Harshad NumbereasyMath1 company
- Largest Substring Between Two Equal CharacterseasyHash TableString1 company
- Largest Time for Given DigitsmediumArrayStringBacktrackingEnumeration1 company
- Longest Ideal SubsequencemediumHash TableStringDynamic Programming1 company
- Maximum Good People Based on StatementshardArrayBacktrackingBit ManipulationEnumeration1 company
- Maximum Number of Items From Sale ImediumArrayDynamic ProgrammingGreedy1 company
- Minimum Sum of Mountain Triplets IeasyArray1 company
- Number of Spaces Cleaning Robot CleanedmediumArrayMatrixSimulation1 company
- Smallest Value of the Rearranged NumbermediumMathSorting1 company
- Strong Password Checker IIeasyString1 company
- Valid Subarrays With Matching Sum Digits ImediumArrayHash TableSliding WindowEnumeration+11 company
- Vowels of All SubstringsmediumMathStringDynamic ProgrammingCombinatorics1 company
- Analyze Organization HierarchyhardDatabase1 company
- Check Balanced StringeasyString1 company
- Check If It Is a Straight LineeasyArrayMathGeometry1 company
- Count Unique Characters of All Substrings of a Given StringhardHash TableStringDynamic Programming1 company
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.