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
- Separate Squares IIhardArrayBinary SearchSegment TreeSweep Line2 companies
- Find the Winner of an Array GamemediumArraySimulation2 companies
- Lexicographically Smallest String After Substring OperationmediumStringGreedy2 companies
- Amount of New Area Painted Each DayhardArraySegment TreeOrdered Set2 companies
- Bomb EnemymediumArrayDynamic ProgrammingMatrix2 companies
- Minimize the Maximum Edge Weight of GraphmediumBinary SearchDepth-First SearchBreadth-First SearchGraph Theory+12 companies
- Number of Distinct Substrings in a StringmediumStringTrieRolling HashSuffix Array+12 companies
- Number of Wonderful SubstringsmediumHash TableStringBit ManipulationPrefix Sum2 companies
- Process Restricted Friend RequestshardUnion-FindGraph Theory2 companies
- Append K Integers With Minimal SummediumArrayMathGreedySorting2 companies
- Complex Number MultiplicationmediumMathStringSimulation2 companies
- Find the Number of Subarrays Where Boundary Elements Are MaximumhardArrayBinary SearchStackMonotonic Stack2 companies
- Kth Distinct String in an ArrayeasyArrayHash TableStringCounting2 companies
- Maximum Subarray Sum After MultipliermediumArrayDynamic Programming2 companies
- Minimize the Difference Between Target and Chosen ElementsmediumArrayDynamic ProgrammingMatrix2 companies
- Minimum Average of Smallest and Largest ElementseasyArrayTwo PointersSorting2 companies
- Paint House IIIhardArrayDynamic Programming2 companies
- Prime Number of Set Bits in Binary RepresentationeasyMathBit ManipulationPrimality Test2 companies
- Ant on the BoundaryeasyArraySimulationPrefix Sum2 companies
- Construct String With Repeat LimitmediumHash TableStringGreedyHeap (Priority Queue)+12 companies
- Delete Columns to Make Sorted IIIhardArrayStringDynamic Programming2 companies
- Erect the FencehardArrayMathGeometryConvex Hull+12 companies
- Find Champion IImediumGraph Theory2 companies
- Guess Number Higher or Lower IImediumMathDynamic ProgrammingMinimaxGame Theory2 companies
- K-Similar StringshardHash TableStringBreadth-First Search2 companies
- Largest Sum of AveragesmediumArrayDynamic ProgrammingPrefix Sum2 companies
- Longest Common Suffix QuerieshardArrayStringTrie2 companies
- Number of BoomerangsmediumArrayHash TableMath2 companies
- Number of Unique Good SubsequenceshardStringDynamic Programming2 companies
- Profitable SchemeshardArrayDynamic ProgrammingKnapsack Problem0-1 Knapsack2 companies
- Range AdditionmediumArrayPrefix Sum2 companies
- Split Array into Consecutive SubsequencesmediumArrayHash TableGreedyHeap (Priority Queue)2 companies
- Sum of Mutated Array Closest to TargetmediumArrayBinary SearchSorting2 companies
- Sum of Prefix Scores of StringshardArrayStringTrieCounting2 companies
- Valid BoomerangeasyArrayMathGeometry2 companies
- Beautiful Arrangement IImediumArrayMath2 companies
- Counter IIeasy2 companies
- Divide ChocolatehardArrayBinary Search2 companies
- Lexicographically Smallest Permutation Greater Than TargetmediumHash TableStringGreedyCounting+12 companies
- Minimum Operations to Make a SubsequencehardArrayHash TableBinary SearchGreedy+12 companies
- Most Beautiful Item for Each QuerymediumArrayBinary SearchSorting2 companies
- Operations on TreemediumArrayHash TableTreeDepth-First Search+22 companies
- Plus One Linked ListmediumLinked ListMath2 companies
- Range Sum of Sorted Subarray SumsmediumArrayTwo PointersBinary SearchSorting+12 companies
- Rearrange Spaces Between WordseasyString2 companies
- Total Waviness of Numbers in Range ImediumMathDynamic ProgrammingEnumeration2 companies
- Distribute CandieseasyArrayHash Table2 companies
- Minimum Swaps to Arrange a Binary GridmediumArrayGreedyMatrix2 companies
- Additive NumbermediumStringBacktracking2 companies
- All People Report to the Given ManagermediumDatabase2 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.