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Array447 String248 Hash Table189 Math173 Database113 Sorting100 Simulation93 Two Pointers70 Counting69 Bit Manipulation54 Greedy51 Matrix41 Tree40 Depth-First Search39 Binary Tree37 All topics

Easy · With video · 70 results

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TitleSolutionAcceptDifficultyTopics

26. Remove Duplicates from Sorted ArrayVideo

Solution63.7%Easy

Array, Two Pointers· 26 companies

27. Remove ElementVideo

Solution62.2%Easy

Array, Two Pointers· 10 companies

28. Find the Index of the First Occurrence in a StringVideo

Solution47.0%Easy

String, String Matching +1· 16 companies

88. Merge Sorted ArrayVideo

Solution55.7%Easy

Array, Sorting +1· 37 companies

125. Valid PalindromeVideo

Solution54.2%Easy

String, Two Pointers· 39 companies

141. Linked List CycleVideo

Solution55.2%Easy

Hash Table, Linked List +1· 24 companies

160. Intersection of Two Linked ListsVideo

Solution64.6%Easy

Hash Table, Linked List +1· 13 companies

170. Two Sum III - Data structure designVideoPremium

Solution39.1%Easy

Array, Data Stream +3· 2 companies

202. Happy NumberVideo

Solution60.0%Easy

Hash Table, Math +1· 27 companies

234. Palindrome Linked ListVideo

Solution58.8%Easy

Linked List, Recursion +2· 17 companies

246. Strobogrammatic NumberVideoPremium

Solution47.6%Easy

Hash Table, String +1· 2 companies

283. Move ZeroesVideo

Solution64.3%Easy

Array, Two Pointers· 46 companies

344. Reverse StringVideo

Solution81.2%Easy

String, Two Pointers· 16 companies

345. Reverse Vowels of a StringVideo

Solution62.1%Easy

String, Two Pointers· 13 companies

349. Intersection of Two ArraysVideo

Solution78.2%Easy

Array, Binary Search +3· 16 companies

350. Intersection of Two Arrays IIVideo

Solution60.4%Easy

Array, Binary Search +3· 9 companies

392. Is SubsequenceVideo

Solution49.5%Easy

Dynamic Programming, String +1· 16 companies

408. Valid Word AbbreviationVideoPremium

Solution37.0%Easy

String, Two Pointers· 7 companies

455. Assign CookiesVideo

Solution55.4%Easy

Array, Greedy +2· 9 companies

541. Reverse String IIVideo

Solution54.7%Easy

String, Two Pointers· 7 companies

557. Reverse Words in a String IIIVideo

Solution84.0%Easy

String, Two Pointers· 7 companies

653. Two Sum IV - Input is a BSTVideo

Solution63.7%Easy

Binary Search Tree, Binary Tree +5· 8 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

821. Shortest Distance to a CharacterVideo

Solution72.7%Easy

Array, String +1· 4 companies

832. Flipping an ImageVideo

Solution83.6%Easy

Array, Bit Manipulation +3· 6 companies

844. Backspace String CompareVideo

Solution49.9%Easy

Simulation, Stack +2· 14 companies

876. Middle of the Linked ListVideo

Solution82.3%Easy

Linked List, Two Pointers· 13 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

925. Long Pressed NameVideo

Solution32.8%Easy

String, Two Pointers· 7 companies

942. DI String MatchVideo

Solution81.0%Easy

Array, Greedy +2· 3 companies

977. Squares of a Sorted ArrayVideo

Solution73.7%Easy

Array, Sorting +1· 17 companies

1089. Duplicate ZerosVideo

Solution54.1%Easy

Array, Two Pointers· 4 companies

1099. Two Sum Less Than KVideoPremium

Solution61.9%Easy

Array, Binary Search +2· 1 company

1332. Remove Palindromic SubsequencesVideo

Solution77.1%Easy

String, Two Pointers· 1 company

1346. Check If N and Its Double ExistVideo

Solution41.7%Easy

Array, Binary Search +3· 5 companies

1385. Find the Distance Value Between Two ArraysVideo

Solution72.1%Easy

Array, Binary Search +2· 5 companies

1455. Check If a Word Occurs As a Prefix of Any Word in a SentenceVideo

Solution68.8%Easy

String, String Matching +1· 4 companies

1768. Merge Strings AlternatelyVideo

Solution82.1%Easy

String, Two Pointers· 11 companies

1826. Faulty SensorVideoPremium

Solution50.2%Easy

Array, Two Pointers· 1 company

1961. Check If String Is a Prefix of ArrayVideo

Solution52.7%Easy

Array, String +1· 1 company

2000. Reverse Prefix of WordVideo

Solution86.3%Easy

Stack, String +1· 5 companies

2108. Find First Palindromic String in the ArrayVideo

Solution83.9%Easy

Array, String +1

2200. Find All K-Distant Indices in an ArrayVideo

Solution77.4%Easy

Array, Two Pointers· 4 companies

2367. Number of Arithmetic TripletsVideo

Solution85.4%Easy

Array, Enumeration +2· 2 companies

2441. Largest Positive Integer That Exists With Its NegativeVideo

Solution74.9%Easy

Array, Hash Table +2· 5 companies

2460. Apply Operations to an ArrayVideo

Solution74.7%Easy

Array, Simulation +1· 4 companies

2465. Number of Distinct AveragesVideo

Solution58.9%Easy

Array, Hash Table +2· 1 company

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