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
348 questions at TikTok · all time
- Word Search IIhardArrayStringBacktrackingTrie+1frequency 61.4
- Binary Tree Maximum Path SumhardDynamic ProgrammingTreeDepth-First SearchBinary Tree+1frequency 59.3
- Construct Binary Tree from Preorder and Inorder TraversalmediumArrayHash TableDivide and ConquerTree+1frequency 59.3
- Count the Hidden SequencesmediumArrayPrefix Sumfrequency 59.3
- Edit DistancemediumStringDynamic Programmingfrequency 59.3
- Lexicographically Smallest Generated StringhardStringGreedyString Matchingfrequency 59.3
- Max Area of IslandmediumArrayDepth-First SearchBreadth-First SearchUnion-Find+1frequency 59.3
- Minimum Cost Good CaptionhardStringDynamic Programmingfrequency 59.3
- Minimum Operations to Make Character Frequencies EqualhardHash TableStringDynamic ProgrammingCounting+1frequency 59.3
- Reorder ListmediumLinked ListTwo PointersStackRecursionfrequency 59.3
- Serialize and Deserialize Binary TreehardStringTreeDepth-First SearchBreadth-First Search+2frequency 59.3
- Word Break IIhardArrayHash TableStringDynamic Programming+3frequency 59.3
- Basic CalculatorhardMathStringStackRecursionfrequency 57.0
- Binary Tree Right Side ViewmediumTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 57.0
- Find First and Last Position of Element in Sorted ArraymediumArrayBinary Searchfrequency 57.0
- Reverse Linked ListeasyLinked ListRecursionfrequency 57.0
- Simplify PathmediumStringStackfrequency 57.0
- Subarray Sums Divisible by KmediumArrayHash TablePrefix Sumfrequency 57.0
- Bus RouteshardArrayHash TableBreadth-First Searchfrequency 54.4
- Climbing StairseasyMathDynamic ProgrammingMemoizationfrequency 54.4
- Closest Prime Numbers in RangemediumMathNumber TheoryPrimality TestSieve Theory+1frequency 54.4
- Combination SummediumArrayBacktrackingfrequency 54.4
- Container With Most WatermediumArrayTwo PointersGreedyfrequency 54.4
- Count Complete Subarrays in an ArraymediumArrayHash TableSliding Windowfrequency 54.4
- Design Add and Search Words Data StructuremediumStringDepth-First SearchDesignTriefrequency 54.4
- Find Peak ElementmediumArrayBinary Searchfrequency 54.4
- Find the Score of All Prefixes of an ArraymediumArrayPrefix Sumfrequency 54.4
- Incremental Memory LeakmediumMathSimulationfrequency 54.4
- Jump GamemediumArrayDynamic ProgrammingGreedyfrequency 54.4
- Length of the Longest Alphabetical Continuous SubstringmediumStringfrequency 54.4
- Minimum Moves to Pick K OneshardArrayGreedySliding WindowPrefix Sumfrequency 54.4
- Most Popular Video CreatormediumArrayHash TableStringSorting+1frequency 54.4
- Pacific Atlantic Water FlowmediumArrayDepth-First SearchBreadth-First SearchMatrixfrequency 54.4
- Possible BipartitionmediumDepth-First SearchBreadth-First SearchUnion-FindGraph Theory+2frequency 54.4
- Remove Duplicate LettersmediumStringStackGreedyMonotonic Stackfrequency 54.4
- Rotting OrangesmediumArrayBreadth-First SearchMatrixfrequency 54.4
- Shortest BridgemediumArrayDepth-First SearchBreadth-First SearchMatrixfrequency 54.4
- Shortest Path in a Grid with Obstacles EliminationhardArrayBreadth-First SearchMatrixfrequency 54.4
- Word BreakmediumArrayHash TableStringDynamic Programming+3frequency 54.4
- Alien DictionaryhardArrayStringDepth-First SearchBreadth-First Search+3frequency 51.4
- Brightest Position on StreetmediumArraySortingPrefix SumOrdered Setfrequency 51.4
- Compare Version NumbersmediumTwo PointersStringfrequency 51.4
- Evaluate DivisionmediumArrayStringDepth-First SearchBreadth-First Search+5frequency 51.4
- Gas StationmediumArrayGreedyfrequency 51.4
- Greatest Common Divisor of StringseasyMathStringEuclidean AlgorithmGreatest Common Divisorfrequency 51.4
- Group AnagramsmediumArrayHash TableStringSortingfrequency 51.4
- Koko Eating BananasmediumArrayBinary Searchfrequency 51.4
- Longest Substring with At Least K Repeating CharactersmediumHash TableStringDivide and ConquerSliding Windowfrequency 51.4
- Lowest Common Ancestor of a Binary TreemediumTreeDepth-First SearchBinary TreeBinary Lifting+1frequency 51.4
- Meeting RoomseasyArraySortingQuicksortfrequency 51.4
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.