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
- Maximum Distance in ArraysmediumArrayGreedy2 companies
- Maximum Students Taking ExamhardArrayDynamic ProgrammingBit ManipulationMatrix+112 companies
- Second Minimum Time to Reach DestinationhardBreadth-First SearchGraph TheoryShortest PathDijkstra's Algorithm+12 companies
- Check if Object Instance of Classmedium2 companies
- Count Mentions Per UsermediumArrayMathSortingSimulation2 companies
- Egg Drop With 2 Eggs and N FloorsmediumMathDynamic Programming2 companies
- Find the PeakseasyArrayEnumeration2 companies
- Find the XOR of Numbers Which Appear TwiceeasyArrayHash TableBit Manipulation2 companies
- Apply Operations to Maximize ScorehardArrayMathStackGreedy+32 companies
- Construct the RectangleeasyMath2 companies
- Find Minimum Diameter After Merging Two TreeshardTreeDepth-First SearchBreadth-First SearchGraph Theory2 companies
- Increasing Order Search TreeeasyStackTreeDepth-First SearchBinary Search Tree+12 companies
- Minimum ASCII Delete Sum for Two StringsmediumStringDynamic ProgrammingLongest Common Subsequence2 companies
- Reach End of Array With Max ScoremediumArrayGreedy2 companies
- Smallest Palindromic Rearrangement IIhardHash TableMathStringCombinatorics+12 companies
- Uncommon Words from Two SentenceseasyHash TableStringCounting2 companies
- Check if Binary String Has at Most One Segment of OneseasyString2 companies
- Count Univalue SubtreesmediumTreeDepth-First SearchBinary TreeDP on Trees2 companies
- Count the Digits That Divide a NumbereasyMath2 companies
- Destination CityeasyArrayHash TableString2 companies
- Distinct Subsequences IIhardStringDynamic Programming2 companies
- Largest Magic SquaremediumArrayMatrixPrefix Sum2 companies
- Length of the Longest Subsequence That Sums to TargetmediumArrayDynamic ProgrammingKnapsack Problem0-1 Knapsack2 companies
- Maximum Number of Jumps to Reach the Last IndexmediumArrayDynamic Programming2 companies
- Minimum Operations to Make All Array Elements EqualmediumArrayBinary SearchSortingPrefix Sum2 companies
- Neighboring Bitwise XORmediumArrayBit Manipulation2 companies
- Network Recovery PathwayshardArrayBinary SearchDynamic ProgrammingGraph Theory+32 companies
- Number of Pairs of Interchangeable RectanglesmediumArrayHash TableMathCounting+12 companies
- Sliding Subarray BeautymediumArrayHash TableSliding Window2 companies
- Add One Row to TreemediumTreeDepth-First SearchBreadth-First SearchBinary Tree2 companies
- Calculator with Method Chainingeasy2 companies
- Find Subarrays With Equal SumeasyArrayHash Table2 companies
- Find X-Sum of All K-Long Subarrays IIhardArrayHash TableSliding WindowHeap (Priority Queue)2 companies
- Find the Largest Almost Missing IntegereasyArrayHash Table2 companies
- Generate Fibonacci Sequenceeasy2 companies
- Longest Subsequence With Non-Zero Bitwise XORmediumArrayBit Manipulation2 companies
- Maximize the Distance Between Points on a SquarehardArrayMathBinary SearchGeometry+12 companies
- Minimize String LengtheasyHash TableString2 companies
- Minimum Jumps to Reach HomemediumArrayHash TableBreadth-First Search2 companies
- Minimum One Bit Operations to Make Integers ZerohardMathDynamic ProgrammingBit ManipulationRecursion+12 companies
- Number of Unique XOR Triplets IImediumArrayMathBit ManipulationEnumeration2 companies
- Number of Ways to Divide a Long CorridorhardMathStringDynamic Programming2 companies
- Paint House IVmediumArrayDynamic Programming2 companies
- Pass the PilloweasyMathSimulation2 companies
- Range Addition IIeasyArrayMath2 companies
- Weighted Word MappingeasyArrayStringSimulation2 companies
- Check if Matrix Is X-MatrixeasyArrayMatrix2 companies
- Data Stream as Disjoint IntervalshardHash TableBinary SearchUnion-FindDesign+22 companies
- Equal Sum Grid Partition IIhardArrayHash TableMatrixEnumeration+12 companies
- Max Increase to Keep City SkylinemediumArrayGreedyMatrix2 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.