Problems
Callback's own problems and the LeetCode questions companies have been asking, in one place — pick a category, then filter by company, frequency, status, difficulty, topic, and language.
Asked on LeetCode
3,115 questions · all time
- Tuple with Same ProductmediumArrayHash TableCounting5 companies
- Find the Prefix Common Array of Two ArraysmediumArrayHash TableBit Manipulation5 companies
- N-th Tribonacci NumbereasyMathDynamic ProgrammingMemoization5 companies
- Search in a Binary Search TreeeasyTreeBinary Search TreeBinary Tree5 companies
- Check If Array Pairs Are Divisible by kmediumArrayHash TableCounting5 companies
- Count Pairs Whose Sum is Less than TargeteasyArrayTwo PointersBinary SearchSorting5 companies
- Find Kth Bit in Nth Binary StringmediumStringRecursionSimulation5 companies
- Find the Maximum Number of Elements in SubsetmediumArrayHash TableEnumeration5 companies
- Maximum Twin Sum of a Linked ListmediumLinked ListTwo PointersStack5 companies
- Number of Longest Increasing SubsequencemediumArrayDynamic ProgrammingBinary Indexed TreeSegment Tree+15 companies
- Find Minimum in Rotated Sorted Array IIhardArrayBinary Search5 companies
- Maximum Unique Subarray Sum After DeletioneasyArrayHash TableGreedy5 companies
- Word SubsetsmediumArrayHash TableString5 companies
- Binary Tree Postorder TraversaleasyStackTreeDepth-First SearchBinary Tree5 companies
- Count Symmetric IntegerseasyMathEnumeration5 companies
- Defuse the BombeasyArraySliding Window5 companies
- Guess Number Higher or LowereasyBinary SearchInteractive5 companies
- Longest Strictly Increasing or Strictly Decreasing SubarrayeasyArray5 companies
- Minimum Limit of Balls in a BagmediumArrayBinary Search5 companies
- Rabbits in ForestmediumArrayHash TableMathGreedy5 companies
- Binary WatcheasyBacktrackingBit Manipulation5 companies
- Count Servers that CommunicatemediumArrayDepth-First SearchBreadth-First SearchUnion-Find+25 companies
- Largest Submatrix With RearrangementsmediumArrayGreedySortingMatrix5 companies
- Maximum Product of Two Elements in an ArrayeasyArraySortingHeap (Priority Queue)5 companies
- Merge Two 2D Arrays by Summing ValueseasyArrayHash TableTwo Pointers5 companies
- Minimum Pair Removal to Sort Array IeasyArrayHash TableLinked ListHeap (Priority Queue)+35 companies
- Number of Ways to Arrive at DestinationmediumDynamic ProgrammingGraph TheoryTopological SortShortest Path+15 companies
- Percentage of Users Attended a ContesteasyDatabase5 companies
- Maximum Matrix SummediumArrayGreedyMatrix5 companies
- Minimized Maximum of Products Distributed to Any StoremediumArrayBinary SearchGreedy5 companies
- Movie RatingmediumDatabase5 companies
- Smallest Subarrays With Maximum Bitwise ORmediumArrayBinary SearchBit ManipulationSliding Window5 companies
- The K Weakest Rows in a MatrixeasyArrayBinary SearchSortingHeap (Priority Queue)+15 companies
- Trionic Array IIhardArrayDynamic Programming5 companies
- Construct the Lexicographically Largest Valid SequencemediumArrayBacktracking5 companies
- Convert a Number to HexadecimaleasyMathStringBit Manipulation5 companies
- Hand of StraightsmediumArrayHash TableGreedySorting5 companies
- Game Play Analysis IeasyDatabase5 companies
- Grid GamemediumArrayMatrixPrefix Sum5 companies
- Longest Nice SubarraymediumArrayBit ManipulationSliding Window5 companies
- Find the K-th Character in String Game IeasyMathBit ManipulationRecursionSimulation5 companies
- Not Boring MovieseasyDatabase5 companies
- Solving Questions With BrainpowermediumArrayDynamic Programming5 companies
- Special Array With X Elements Greater Than or Equal XeasyArrayBinary SearchSorting5 companies
- Determine if Two Strings Are ClosemediumHash TableStringSortingCounting5 companies
- Adding Spaces to a StringmediumArrayTwo PointersStringSimulation5 companies
- Count Elements With Maximum FrequencyeasyArrayHash TableCounting5 companies
- Count the Number of Substrings With Dominant OnesmediumStringEnumeration5 companies
- Find Words That Can Be Formed by CharacterseasyArrayHash TableStringCounting5 companies
- String Matching in an ArrayeasyArrayStringString Matching5 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.