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Problems

252 problems

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Two PointersArray2,237String877Hash Table797Math691Dynamic Programming673Sorting508Greedy485Binary Search357Depth-First Search338Database308Bit Manipulation286Matrix279Tree264Breadth-First Search257Prefix Sum252All topics

252 results

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TitleSolutionAcceptDifficultyTopics
443. String CompressionVideo
Solution60.9%Medium
String, Two Pointers· 41 companies
455. Assign CookiesVideo
Solution55.4%Easy
Array, Greedy +2· 9 companies
457. Circular Array LoopVideo
Solution38.3%Medium
Array, Hash Table +1· 4 companies
475. HeatersVideo
Solution42.3%Medium
Array, Binary Search +2· 12 companies
481. Magical StringVideo
Solution56.6%Medium
String, Two Pointers· 3 companies
522. Longest Uncommon Subsequence IIVideo
Solution45.8%Medium
Array, Hash Table +3· 1 company
524. Longest Word in Dictionary through DeletingVideo
Solution53.2%Medium
Array, Sorting +2· 2 companies
532. K-diff Pairs in an ArrayVideo
Solution46.3%Medium
Array, Binary Search +3· 8 companies
541. Reverse String IIVideo
Solution54.7%Easy
String, Two Pointers· 7 companies
556. Next Greater Element IIIVideo
Solution35.2%Medium
Math, String +1· 11 companies
557. Reverse Words in a String IIIVideo
Solution84.0%Easy
String, Two Pointers· 7 companies
567. Permutation in StringVideo
Solution49.8%Medium
Hash Table, Sliding Window +2· 16 companies
581. Shortest Unsorted Continuous SubarrayVideo
Solution38.7%Medium
Array, Greedy +4· 9 companies
611. Valid Triangle NumberVideo
Solution56.8%Medium
Array, Binary Search +3· 9 companies
633. Sum of Square NumbersVideo
Solution37.0%Medium
Binary Search, Math +1· 6 companies
647. Palindromic SubstringsVideo
Solution73.2%Medium
Dynamic Programming, String +1· 25 companies
653. Two Sum IV - Input is a BSTVideo
Solution63.7%Easy
Binary Search Tree, Binary Tree +5· 8 companies
658. Find K Closest ElementsVideo
Solution50.1%Medium
Array, Binary Search +4· 18 companies
680. Valid Palindrome IIVideo
Solution44.7%Easy
Greedy, String +1· 16 companies
696. Count Binary SubstringsVideo
Solution70.3%Easy
String, Two Pointers· 18 companies
719. Find K-th Smallest Pair DistanceVideo
Solution46.4%Hard
Array, Binary Search +2· 5 companies
723. Candy CrushVideoPremium
Solution77.6%Medium
Array, Matrix +2· 11 companies
763. Partition LabelsVideo
Solution81.8%Medium
Greedy, Hash Table +2· 9 companies
777. Swap Adjacent in LR StringVideo
Solution38.5%Medium
String, Two Pointers· 3 companies
786. K-th Smallest Prime FractionVideo
Solution69.0%Medium
Array, Binary Search +3· 1 company
795. Number of Subarrays with Bounded MaximumVideo
Solution55.4%Medium
Array, Two Pointers· 4 companies
809. Expressive WordsVideo
Solution46.8%Medium
Array, String +1· 2 companies
821. Shortest Distance to a CharacterVideo
Solution72.7%Easy
Array, String +1· 4 companies
825. Friends Of Appropriate AgesVideo
Solution49.9%Medium
Array, Binary Search +2· 3 companies
826. Most Profit Assigning WorkVideo
Solution56.4%Medium
Array, Binary Search +3· 5 companies
832. Flipping an ImageVideo
Solution83.6%Easy
Array, Bit Manipulation +3· 6 companies
838. Push DominoesVideo
Solution63.0%Medium
Dynamic Programming, String +1· 6 companies
844. Backspace String CompareVideo
Solution49.9%Easy
Simulation, Stack +2· 14 companies
845. Longest Mountain in ArrayVideo
Solution42.6%Medium
Array, Dynamic Programming +2· 10 companies
870. Advantage ShuffleVideo
Solution55.0%Medium
Array, Greedy +2· 3 companies
876. Middle of the Linked ListVideo
Solution82.3%Easy
Linked List, Two Pointers· 13 companies
881. Boats to Save PeopleVideo
Solution62.7%Medium
Array, Greedy +2· 11 companies
905. Sort Array By ParityVideo
Solution76.2%Easy
Array, Sorting +1· 8 companies
917. Reverse Only LettersVideo
Solution68.9%Easy
String, Two Pointers· 5 companies
922. Sort Array By Parity IIVideo
Solution71.4%Easy
Array, Sorting +1· 6 companies
923. 3Sum With MultiplicityVideo
Solution46.2%Medium
Array, Counting +3· 4 companies
925. Long Pressed NameVideo
Solution32.8%Easy
String, Two Pointers· 7 companies
942. DI String MatchVideo
Solution81.0%Easy
Array, Greedy +2· 3 companies
948. Bag of TokensVideo
Solution59.5%Medium
Array, Greedy +2· 4 companies
969. Pancake SortingVideo
Solution71.7%Medium
Array, Greedy +2· 3 companies
977. Squares of a Sorted ArrayVideo
Solution73.7%Easy
Array, Sorting +1· 17 companies
986. Interval List IntersectionsVideo
Solution73.0%Medium
Array, Two Pointers· 12 companies
1023. Camelcase MatchingVideo
Solution65.8%Medium
Array, String +3· 2 companies
1040. Moving Stones Until Consecutive IIVideo
Solution59.4%Medium
Array, Math +2· 1 company
1048. Longest String ChainVideo
Solution63.5%Medium
Array, Dynamic Programming +4· 16 companies
Showing 51–100 of 252