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
2,344 questions at Google · all time
- Minimum Initial Energy to Finish TaskshardArrayGreedySortingfrequency 12.6
- Minimum Insertion Steps to Make a String PalindromehardStringDynamic Programmingfrequency 12.6
- Minimum Moves to Equal Array Elements IImediumArrayMathSortingfrequency 12.6
- Minimum Number of Steps to Make Two Strings AnagrammediumHash TableStringCountingfrequency 12.6
- Minimum Operations to Make Array Elements ZerohardArrayMathBit Manipulationfrequency 12.6
- Minimum Operations to Make the Integer ZeromediumBit ManipulationBrainteaserEnumerationfrequency 12.6
- Minimum Replacements to Sort the ArrayhardArrayMathGreedyfrequency 12.6
- Next Greater Node In Linked ListmediumArrayLinked ListStackMonotonic Stackfrequency 12.6
- Nth Magical NumberhardMathBinary SearchLeast Common MultipleInclusion-Exclusion Principlefrequency 12.6
- Number of Steps to Reduce a Number in Binary Representation to OnemediumStringBit ManipulationSimulationfrequency 12.6
- Number of Sub-arrays With Odd SummediumArrayMathDynamic ProgrammingPrefix Sumfrequency 12.6
- Open the LockmediumArrayHash TableStringBreadth-First Search+1frequency 12.6
- Painting the WallshardArrayDynamic Programmingfrequency 12.6
- Prime PalindromemediumMathNumber TheoryPrimality Testfrequency 12.6
- Print Binary TreemediumTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 12.6
- Put Marbles in BagshardArrayGreedySortingHeap (Priority Queue)frequency 12.6
- Remove All Adjacent Duplicates in String IImediumStringStackfrequency 12.6
- Reorder Routes to Make All Paths Lead to the City ZeromediumDepth-First SearchBreadth-First SearchGraph Theoryfrequency 12.6
- Reshape the MatrixeasyArrayMatrixSimulationfrequency 12.6
- Reverse Odd Levels of Binary TreemediumTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 12.6
- Reverse Prefix of WordeasyTwo PointersStringStackfrequency 12.6
- Second Minimum Time to Reach DestinationhardBreadth-First SearchGraph TheoryShortest PathDijkstra's Algorithm+1frequency 12.6
- Set Intersection Size At Least TwohardArrayGreedySortingfrequency 12.6
- Simple Bank SystemmediumArrayHash TableDesignSimulationfrequency 12.6
- Smallest Divisible Digit Product IIhardMathStringBacktrackingGreedy+1frequency 12.6
- Smallest Number in Infinite SetmediumHash TableDesignHeap (Priority Queue)Ordered Setfrequency 12.6
- Sort Array By Parity IIeasyArrayTwo PointersSortingfrequency 12.6
- Sort Integers by The Number of 1 BitseasyArrayBit ManipulationSortingCountingfrequency 12.6
- String Compression IIImediumStringfrequency 12.6
- Sum of All Subset XOR TotalseasyArrayMathBacktrackingBit Manipulation+2frequency 12.6
- Take K of Each Character From Left and RightmediumHash TableStringSliding Windowfrequency 12.6
- The Two Sneaky Numbers of DigitvilleeasyArrayHash TableMathfrequency 12.6
- To Lower CaseeasyStringfrequency 12.6
- Trionic Array IIhardArrayDynamic Programmingfrequency 12.6
- Two Furthest Houses With Different ColorseasyArrayGreedyfrequency 12.6
- Valid SquaremediumMathGeometryfrequency 12.6
- Validate Stack SequencesmediumArrayStackSimulationfrequency 12.6
- 1-bit and 2-bit CharacterseasyArrayfrequency 10.5
- 4Sum IImediumArrayHash Tablefrequency 10.5
- Add to Array-Form of IntegereasyArrayMathfrequency 10.5
- Alice and Bob Playing Flower GamemediumMathfrequency 10.5
- Allow One Function Calleasyfrequency 10.5
- Apply Operations to Maximize ScorehardArrayMathStackGreedy+3frequency 10.5
- Available Captures for RookeasyArrayMatrixSimulationfrequency 10.5
- Average of Levels in Binary TreeeasyTreeDepth-First SearchBreadth-First SearchBinary Treefrequency 10.5
- Balance a Binary Search TreemediumDivide and ConquerGreedyTreeDepth-First Search+2frequency 10.5
- Binary Tree CamerashardDynamic ProgrammingTreeDepth-First SearchBinary Tree+1frequency 10.5
- Binary Tree Level Order Traversal IImediumTreeBreadth-First SearchBinary Treefrequency 10.5
- Brick WallmediumArrayHash Tablefrequency 10.5
- Can I WinmediumMathDynamic ProgrammingBit ManipulationMemoization+2frequency 10.5
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.