11.Container With Most Water
MediumArrayGreedyTwo Pointers60.9% acceptance57 companiesVideo
462 results
44.Wildcard Matching
HardDynamic ProgrammingGreedyRecursion32.8% acceptance17 companiesVideo
45.Jump Game II
MediumArrayDynamic ProgrammingGreedy43.2% acceptance26 companiesVideo
55.Jump Game
MediumArrayDynamic ProgrammingGreedy41.2% acceptance33 companiesVideo
122.Best Time to Buy and Sell Stock II
MediumArrayDynamic ProgrammingGreedy71.4% acceptance28 companiesVideo
134.Gas Station
MediumArrayGreedy48.4% acceptance29 companiesVideo
135.Candy
HardArrayGreedy49.3% acceptance24 companiesVideo
179.Largest Number
MediumArrayGreedySorting43.9% acceptance23 companiesVideo
253.Meeting Rooms II
MediumArrayGreedyHeap (Priority Queue)52.6% acceptance42 companiesPremium elsewhere, free hereVideo
280.Wiggle Sort
MediumArrayGreedySorting68.5% acceptance4 companiesPremium elsewhere, free hereVideo
316.Remove Duplicate Letters
MediumGreedyMonotonic StackStack54.7% acceptance13 companiesVideo
321.Create Maximum Number
HardArrayGreedyMonotonic Stack37.3% acceptance7 companiesVideo
324.Wiggle Sort II
MediumArrayDivide and ConquerGreedy38.4% acceptance4 companiesVideo
330.Patching Array
HardArrayGreedy54.7% acceptance4 companiesVideo
334.Increasing Triplet Subsequence
MediumArrayGreedy39.3% acceptance7 companiesVideo
358.Rearrange String k Distance Apart
HardCountingGreedyHash Table39.9% acceptance4 companiesPremium elsewhere, free hereVideo
376.Wiggle Subsequence
MediumArrayDynamic ProgrammingGreedy49.9% acceptance1 companyVideo
397.Integer Replacement
MediumBit ManipulationDynamic ProgrammingGreedy37.9% acceptance4 companiesVideo
402.Remove K Digits
MediumGreedyMonotonic StackStack37.7% acceptance21 companiesVideo
409.Longest Palindrome
EasyGreedyHash TableString55.9% acceptance8 companiesVideo
410.Split Array Largest Sum
HardArrayBinary SearchDynamic Programming61.2% acceptance20 companiesVideo
420.Strong Password Checker
HardGreedyHeap (Priority Queue)String16.7% acceptance7 companiesVideo
435.Non-overlapping Intervals
MediumArrayDynamic ProgrammingGreedy57.5% acceptance18 companiesVideo
452.Minimum Number of Arrows to Burst Balloons
MediumArrayGreedySorting61.9% acceptance8 companiesVideo
455.Assign Cookies
EasyArrayGreedySorting55.4% acceptance9 companiesVideo
484.Find Permutation
MediumArrayGreedyStack67.0% acceptance1 companyPremium elsewhere, free hereVideo
502.IPO
HardArrayGreedyHeap (Priority Queue)53.6% acceptance9 companiesVideo
517.Super Washing Machines
HardArrayGreedy45.9% acceptance2 companiesVideo
527.Word Abbreviation
HardArrayGreedySorting62.7% acceptance4 companiesPremium elsewhere, free hereVideo
555.Split Concatenated Strings
MediumArrayGreedyString43.4% acceptance1 companyPremium elsewhere, free hereVideo
561.Array Partition
EasyArrayCounting SortGreedy82.2% acceptance5 companiesVideo
581.Shortest Unsorted Continuous Subarray
MediumArrayGreedyMonotonic Stack38.7% acceptance9 companiesVideo
605.Can Place Flowers
EasyArrayGreedy28.8% acceptance16 companiesVideo
611.Valid Triangle Number
MediumArrayBinary SearchGreedy57.4% acceptance9 companiesVideo
621.Task Scheduler
MediumArrayCountingGreedy64.0% acceptance24 companiesVideo
624.Maximum Distance in Arrays
MediumArrayGreedy45.7% acceptance5 companiesVideo
625.Minimum Factorization
MediumGreedyMath34.2% acceptance1 companyPremium elsewhere, free hereVideo
630.Course Schedule III
HardArrayGreedyHeap (Priority Queue)42.1% acceptance4 companiesVideo
632.Smallest Range Covering Elements from K Lists
HardArrayGreedyHash Table70.3% acceptance10 companiesVideo
646.Maximum Length of Pair Chain
MediumArrayDynamic ProgrammingGreedy62.2% acceptance2 companiesVideo
649.Dota2 Senate
MediumGreedyQueueString50.3% acceptance6 companiesVideo
659.Split Array into Consecutive Subsequences
MediumArrayGreedyHash Table52.7% acceptance2 companiesVideo
670.Maximum Swap
MediumGreedyMath51.6% acceptance9 companiesVideo
678.Valid Parenthesis String
MediumDynamic ProgrammingGreedyStack42.8% acceptance15 companiesVideo
680.Valid Palindrome II
EasyGreedyStringTwo Pointers44.7% acceptance16 companiesVideo
714.Best Time to Buy and Sell Stock with Transaction Fee
MediumArrayDynamic ProgrammingGreedy72.4% acceptance8 companiesVideo
738.Monotone Increasing Digits
MediumGreedyMath50.1% acceptance3 companiesVideo
757.Set Intersection Size At Least Two
HardArrayGreedySorting58.0% acceptance6 companiesVideo
763.Partition Labels
MediumGreedyHash TableString81.8% acceptance9 companiesVideo
765.Couples Holding Hands
HardBreadth-First SearchDepth-First SearchGraph59.8% acceptance5 companiesVideo
Showing 1–50 of 462
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.