691.Stickers to Spell Word
HardArrayBacktrackingBit Manipulation51.3% acceptance4 companiesVideo
2,120 results
695.Max Area of Island
MediumArrayBreadth-First SearchDepth-First Search73.9% acceptance20 companiesVideo
697.Degree of an Array
EasyArrayHash Table58.8% acceptance12 companiesVideo
698.Partition to K Equal Sum Subsets
MediumArrayBacktrackingBit Manipulation38.6% acceptance8 companiesVideo
699.Falling Squares
HardArrayOrdered SetSegment Tree48.9% acceptance2 companiesVideo
702.Search in a Sorted Array of Unknown Size
MediumArrayBinary SearchInteractive73.1% acceptance1 companyPremium elsewhere, free hereVideo
704.Binary Search
EasyArrayBinary Search61.2% acceptance11 companiesVideo
705.Design HashSet
EasyArrayDesignHash Function67.9% acceptance6 companiesVideo
706.Design HashMap
EasyArrayDesignHash Function66.5% acceptance13 companiesVideo
710.Random Pick with Blacklist
HardArrayBinary SearchHash Table35.4% acceptance3 companiesVideo
713.Subarray Product Less Than K
MediumArrayBinary SearchPrefix Sum54.8% acceptance20 companiesVideo
714.Best Time to Buy and Sell Stock with Transaction Fee
MediumArrayDynamic ProgrammingGreedy72.4% acceptance8 companiesVideo
717.1-bit and 2-bit Characters
EasyArray49.5% acceptance4 companiesVideo
718.Maximum Length of Repeated Subarray
MediumArrayBinary SearchDynamic Programming51.5% acceptance7 companiesVideo
719.Find K-th Smallest Pair Distance
HardArrayBinary SearchSorting46.4% acceptance5 companiesVideo
720.Longest Word in Dictionary
MediumArrayHash TableSorting55.2% acceptance3 companiesVideo
721.Accounts Merge
MediumArrayBreadth-First SearchDepth-First Search62.2% acceptance17 companiesVideo
722.Remove Comments
MediumArrayString40.1% acceptance4 companiesVideo
723.Candy Crush
MediumArrayMatrixSimulation77.6% acceptance11 companiesPremium elsewhere, free hereVideo
724.Find Pivot Index
EasyArrayPrefix Sum64.2% acceptance18 companiesVideo
729.My Calendar I
MediumArrayBinary SearchDesign58.4% acceptance12 companiesVideo
731.My Calendar II
MediumArrayBinary SearchDesign63.3% acceptance3 companiesVideo
733.Flood Fill
EasyArrayBreadth-First SearchDepth-First Search68.6% acceptance12 companiesVideo
734.Sentence Similarity
EasyArrayHash TableString44.5% acceptance1 companyPremium elsewhere, free hereVideo
735.Asteroid Collision
MediumArraySimulationStack49.2% acceptance32 companiesVideo
737.Sentence Similarity II
MediumArrayBreadth-First SearchDepth-First Search51.2% acceptance4 companiesPremium elsewhere, free hereVideo
739.Daily Temperatures
MediumArrayMonotonic StackStack69.1% acceptance32 companiesVideo
740.Delete and Earn
MediumArrayDynamic ProgrammingHash Table57.7% acceptance12 companiesVideo
741.Cherry Pickup
HardArrayDynamic ProgrammingMatrix40.4% acceptance10 companiesVideo
744.Find Smallest Letter Greater Than Target
EasyArrayBinary Search59.6% acceptance7 companiesVideo
745.Prefix and Suffix Search
HardArrayDesignHash Table41.2% acceptance3 companiesVideo
746.Min Cost Climbing Stairs
EasyArrayDynamic Programming68.7% acceptance7 companiesVideo
747.Largest Number At Least Twice of Others
EasyArraySorting53.4% acceptance4 companiesVideo
748.Shortest Completing Word
EasyArrayHash TableString63.5% acceptance1 companyVideo
749.Contain Virus
HardArrayBreadth-First SearchDepth-First Search56.5% acceptance3 companiesVideo
750.Number Of Corner Rectangles
MediumArrayDynamic ProgrammingMath67.8% acceptance1 companyPremium elsewhere, free hereVideo
752.Open the Lock
MediumArrayBreadth-First SearchHash Table61.2% acceptance15 companiesVideo
755.Pour Water
MediumArraySimulation49.1% acceptance2 companiesPremium elsewhere, free hereVideo
757.Set Intersection Size At Least Two
HardArrayGreedySorting58.0% acceptance6 companiesVideo
758.Bold Words in String
MediumArrayHash TableString53.2% acceptance1 companyPremium elsewhere, free hereVideo
759.Employee Free Time
HardArrayHeap (Priority Queue)Sorting72.9% acceptance12 companiesPremium elsewhere, free hereVideo
760.Find Anagram Mappings
EasyArrayHash Table83.8% acceptance1 companyPremium elsewhere, free hereVideo
764.Largest Plus Sign
MediumArrayDynamic Programming49.7% acceptance2 companiesVideo
766.Toeplitz Matrix
EasyArrayMatrix69.8% acceptance4 companiesVideo
768.Max Chunks To Make Sorted II
HardArrayGreedyMonotonic Stack54.7% acceptance5 companiesVideo
769.Max Chunks To Make Sorted
MediumArrayGreedyMonotonic Stack64.1% acceptance7 companiesVideo
773.Sliding Puzzle
HardArrayBacktrackingBreadth-First Search74.3% acceptance7 companiesVideo
774.Minimize Max Distance to Gas Station
HardArrayBinary Search53.9% acceptance2 companiesPremium elsewhere, free hereVideo
775.Global and Local Inversions
MediumArrayMath42.9% acceptance1 companyVideo
778.Swim in Rising Water
HardArrayBinary SearchBreadth-First Search68.3% acceptance8 companiesVideo
Showing 301–350 of 2,120
How to use these solutions
Each solution breaks the problem into approaches, usually from brute force to the best one, and explains why each works. Code comes in Python, Java, C++ and other languages. Knowing why an approach works matters more in an interview than remembering the code.
- Try the problem first. Give it at least 20 minutes before you open the solution.
- Read every approach. The brute force shows you the problem; the faster ones show the pattern.
- Check the complexity. Note the time and space of each approach and what makes the difference.
- Write it yourself. Close the solution and code it from memory in the editor.
- Come back in a week. Solving it again later is what makes the pattern stick.